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[PATCH kernel-4.19] fs/buffer.c: add checking buffer head stat before clear
by Yang Yingliang 15 Jun '21

15 Jun '21

From: Yang Guo <guoyang2(a)huawei.com> mainline inclusion from mainline-v5.12-rc1 commit 4ebd3aec3842662300979dacd6fb38e3e8edf7f4 category: performance bugzilla: NA CVE: NA -------------------------------- clear_buffer_new() is used to clear buffer new stat. When PAGE_SIZE is 64K, most buffer heads in the list are not needed to clear. clear_buffer_new() has an enpensive atomic modification operation, Let's add checking buffer head before clear it as __block_write_begin_int does which is good for performance. Link: https://lkml.kernel.org/r/1612332890-57918-1-git-send-email-zhangshaokun@hi… Signed-off-by: Yang Guo <guoyang2(a)huawei.com> Signed-off-by: Shaokun Zhang <zhangshaokun(a)hisilicon.com> Cc: Alexander Viro <viro(a)zeniv.linux.org.uk> Cc: Nick Piggin <npiggin(a)suse.de> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/buffer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/buffer.c b/fs/buffer.c index 10e7389786d33..2a213e8bb97c7 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -2050,7 +2050,8 @@ static int __block_commit_write(struct inode *inode, struct page *page, set_buffer_uptodate(bh); mark_buffer_dirty(bh); } - clear_buffer_new(bh); + if (buffer_new(bh)) + clear_buffer_new(bh); block_start = block_end; bh = bh->b_this_page; -- 2.25.1

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[PATCH openEuler-1.0-LTS] Bluetooth: SMP: Fail if remote and local public keys are identical
by Yang Yingliang 15 Jun '21

15 Jun '21

From: Luiz Augusto von Dentz <luiz.von.dentz(a)intel.com> stable inclusion from linux-4.19.192 commit 30126d4ba73119565f1748b116b9869ac6bbda6b CVE: CVE-2021-0129 -------------------------------- commit 6d19628f539fccf899298ff02ee4c73e4bf6df3f upstream. This fails the pairing procedure when both remote and local non-debug public keys are identical. Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz(a)intel.com> Signed-off-by: Marcel Holtmann <marcel(a)holtmann.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- net/bluetooth/smp.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index cc2f7ca91ccdd..719ae1dff7b4e 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -2703,6 +2703,15 @@ static int smp_cmd_public_key(struct l2cap_conn *conn, struct sk_buff *skb) if (skb->len < sizeof(*key)) return SMP_INVALID_PARAMS; + /* Check if remote and local public keys are the same and debug key is + * not in use. + */ + if (!test_bit(SMP_FLAG_DEBUG_KEY, &smp->flags) && + !crypto_memneq(key, smp->local_pk, 64)) { + bt_dev_err(hdev, "Remote and local public keys are identical"); + return SMP_UNSPECIFIED; + } + memcpy(smp->remote_pk, key, 64); if (test_bit(SMP_FLAG_REMOTE_OOB, &smp->flags)) { -- 2.25.1

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Re: [PATCH] make btrfs_truncate_block check NOCOW attribute
by Xie XiuQi 15 Jun '21

15 Jun '21

Hi， Thanks for your patch. Please subscribe the kernel(a)openeuler.org mailing list first before sending patch, or your patch would be pending by the mailing list service. Other people can not receive your email. Follow the tips to subscribe kernel(a)openeuler.org and kernel-discuss(a)openeuler.org list. https://openeuler.org/zh/community/mailing-list/ --- Xie XiuQi On 2021/6/15 11:10, Gou Hao wrote: > From: gouhao <gouhao(a)uniontech.com> > > make btrfs_truncate_block check NOCOW attribute > > mainline inclusion > from https://patchwork.kernel.org/project/linux-btrfs/patch/20200130052822.11765… > category: bugfix > bugzilla: https://gitee.com/openeuler/kernel/issues/I39MZM > CVE: NA > ------------------------------------------------------ > > ltp fallocate06 testcase failed > > Signed-off-by: gouhao <gouhao(a)uniontech.com> > --- > fs/btrfs/ctree.h | 3 ++- > fs/btrfs/file.c | 8 ++++---- > fs/btrfs/inode.c | 39 +++++++++++++++++++++++++++++++++------ > 3 files changed, 39 insertions(+), 11 deletions(-) > > diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h > index 4d1c12faada8..4f5c58d40a79 100644 > --- a/fs/btrfs/ctree.h > +++ b/fs/btrfs/ctree.h > @@ -3271,7 +3271,8 @@ int btrfs_dirty_pages(struct inode *inode, struct page **pages, > int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); > int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, > struct file *file_out, loff_t pos_out, u64 len); > - > +int btrfs_check_can_nocow(struct btrfs_inode *inode, loff_t pos, > + size_t *write_bytes); > /* tree-defrag.c */ > int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, > struct btrfs_root *root); > diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c > index a202f2f12b1c..c204fbe512b7 100644 > --- a/fs/btrfs/file.c > +++ b/fs/btrfs/file.c > @@ -1536,8 +1536,8 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct page **pages, > return ret; > } > > -static noinline int check_can_nocow(struct btrfs_inode *inode, loff_t pos, > - size_t *write_bytes) > +int btrfs_check_can_nocow(struct btrfs_inode *inode, loff_t pos, > + size_t *write_bytes) > { > struct btrfs_fs_info *fs_info = inode->root->fs_info; > struct btrfs_root *root = inode->root; > @@ -1647,7 +1647,7 @@ static noinline ssize_t btrfs_buffered_write(struct kiocb *iocb, > if (ret < 0) { > if ((BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW | > BTRFS_INODE_PREALLOC)) && > - check_can_nocow(BTRFS_I(inode), pos, > + btrfs_check_can_nocow(BTRFS_I(inode), pos, > &write_bytes) > 0) { > /* > * For nodata cow case, no need to reserve > @@ -1925,7 +1925,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb, > */ > if (!(BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW | > BTRFS_INODE_PREALLOC)) || > - check_can_nocow(BTRFS_I(inode), pos, &count) <= 0) { > + btrfs_check_can_nocow(BTRFS_I(inode), pos, &count) <= 0) { > inode_unlock(inode); > return -EAGAIN; > } > diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c > index 8c6f619c9ee6..6641fa77d4f9 100644 > --- a/fs/btrfs/inode.c > +++ b/fs/btrfs/inode.c > @@ -4946,11 +4946,13 @@ int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, > struct extent_state *cached_state = NULL; > struct extent_changeset *data_reserved = NULL; > char *kaddr; > + bool only_release_metadata = false; > u32 blocksize = fs_info->sectorsize; > pgoff_t index = from >> PAGE_SHIFT; > unsigned offset = from & (blocksize - 1); > struct page *page; > gfp_t mask = btrfs_alloc_write_mask(mapping); > + size_t write_bytes = blocksize; > int ret = 0; > u64 block_start; > u64 block_end; > @@ -4962,10 +4964,26 @@ int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, > block_start = round_down(from, blocksize); > block_end = block_start + blocksize - 1; > > - ret = btrfs_delalloc_reserve_space(inode, &data_reserved, > - block_start, blocksize); > - if (ret) > + ret = btrfs_check_data_free_space(inode, &data_reserved, > + block_start, blocksize); > + if (ret < 0) { > + if ((BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW | > + BTRFS_INODE_PREALLOC)) && > + btrfs_check_can_nocow(BTRFS_I(inode), block_start, > + &write_bytes) > 0) { > + /* For nocow case, no need to reserve data space */ > + only_release_metadata = true; > + } else { > + goto out; > + } > + } > + ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), blocksize); > + if (ret < 0) { > + if (!only_release_metadata) > + btrfs_free_reserved_data_space(inode, data_reserved, > + block_start, blocksize); > goto out; > + } > > again: > page = find_or_create_page(mapping, index, mask); > @@ -5036,10 +5054,19 @@ int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, > set_page_dirty(page); > unlock_extent_cached(io_tree, block_start, block_end, &cached_state); > > + if (only_release_metadata) > + set_extent_bit(&BTRFS_I(inode)->io_tree, block_start, > + block_end, EXTENT_NORESERVE, NULL, NULL, > + GFP_NOFS); > out_unlock: > - if (ret) > - btrfs_delalloc_release_space(inode, data_reserved, block_start, > - blocksize, true); > + if (ret) { > + if (only_release_metadata) > + btrfs_delalloc_release_metadata(BTRFS_I(inode), > + blocksize, true); > + else > + btrfs_delalloc_release_space(inode, data_reserved, > + block_start, blocksize, true); > + } > btrfs_delalloc_release_extents(BTRFS_I(inode), blocksize); > unlock_page(page); > put_page(page); >

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[PATCH kernel-4.19 1/3] irqchip: phytium-2500: Add interrupt controller driver
by Yang Yingliang 15 Jun '21

15 Jun '21

From: Mao HongBo <maohongbo(a)phytium.com.cn> hulk inclusion category: Feature bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=52 CVE: NA ------------------------------------------------- To enable support for Phytium ARMv8 S2500/FT-2500 SoC and 2-Processor server, add phytium-2500 specific interrupt controller driver based on ARM original irq-gic-v3.c and irq-gic-v3-its.c Signed-off-by: Mao HongBo <maohongbo(a)phytium.com.cn> Signed-off-by: Zheng Zengkai <zhengzengkai(a)huawei.com> Reviewed-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- arch/arm64/Kconfig.platforms | 6 + drivers/irqchip/Kconfig | 9 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-gic-phytium-2500-its.c | 4111 ++++++++++++++++++ drivers/irqchip/irq-gic-phytium-2500.c | 2136 +++++++++ include/acpi/actbl2.h | 3 +- include/linux/irqchip/arm-gic-phytium-2500.h | 640 +++ 7 files changed, 6905 insertions(+), 1 deletion(-) create mode 100644 drivers/irqchip/irq-gic-phytium-2500-its.c create mode 100644 drivers/irqchip/irq-gic-phytium-2500.c create mode 100644 include/linux/irqchip/arm-gic-phytium-2500.h diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms index 91c7ffad85413..3b6f6bc923434 100644 --- a/arch/arm64/Kconfig.platforms +++ b/arch/arm64/Kconfig.platforms @@ -140,6 +140,12 @@ config ARCH_MVEBU - Armada 7K SoC Family - Armada 8K SoC Family +config ARCH_PHYTIUM + bool "Phytium SoC Family" + help + This enables support for Phytium ARMv8 SoC family. + select ARM_GIC_PHYTIUM_2500 + config ARCH_QCOM bool "Qualcomm Platforms" select GPIOLIB diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index bc34ee8c35c12..edca328960de2 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -57,6 +57,15 @@ config ARM_GIC_V3_ITS_FSL_MC depends on FSL_MC_BUS default ARM_GIC_V3_ITS +config ARM_GIC_PHYTIUM_2500 + bool + select IRQ_DOMAIN + select GENERIC_IRQ_MULTI_HANDLER + select IRQ_DOMAIN_HIERARCHY + select PARTITION_PERCPU + select GENERIC_IRQ_EFFECTIVE_AFF_MASK + select GENERIC_MSI_IRQ_DOMAIN + config ARM_NVIC bool select IRQ_DOMAIN diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index fbd1ec8070efa..7ee4db82d9839 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_ARM_GIC_V3) += irq-gic-v3.o irq-gic-v3-mbi.o irq-gic-common.o obj-$(CONFIG_ARM_GIC_V3_ITS) += irq-gic-v3-its.o irq-gic-v3-its-platform-msi.o irq-gic-v4.o obj-$(CONFIG_ARM_GIC_V3_ITS_PCI) += irq-gic-v3-its-pci-msi.o obj-$(CONFIG_ARM_GIC_V3_ITS_FSL_MC) += irq-gic-v3-its-fsl-mc-msi.o +obj-$(CONFIG_ARM_GIC_PHYTIUM_2500) += irq-gic-phytium-2500.o irq-gic-phytium-2500-its.o obj-$(CONFIG_PARTITION_PERCPU) += irq-partition-percpu.o obj-$(CONFIG_HISILICON_IRQ_MBIGEN) += irq-mbigen.o obj-$(CONFIG_ARM_NVIC) += irq-nvic.o diff --git a/drivers/irqchip/irq-gic-phytium-2500-its.c b/drivers/irqchip/irq-gic-phytium-2500-its.c new file mode 100644 index 0000000000000..cdb58bf99c7c3 --- /dev/null +++ b/drivers/irqchip/irq-gic-phytium-2500-its.c @@ -0,0 +1,4111 @@ +/* + * Copyright (C) 2020 Phytium Corporation. + * Author: Wang Yinfeng <wangyinfeng(a)phytium.com.cn> + * Chen Baozi <chenbaozi(a)phytium.com.cn> + * Mao Honngbo <maohongbo(a)phytium.com.cn> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/acpi.h> +#include <linux/acpi_iort.h> +#include <linux/bitfield.h> +#include <linux/bitmap.h> +#include <linux/cpu.h> +#include <linux/crash_dump.h> +#include <linux/delay.h> +#include <linux/dma-iommu.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/list.h> +#include <linux/list_sort.h> +#include <linux/log2.h> +#include <linux/mm.h> +#include <linux/msi.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_pci.h> +#include <linux/of_platform.h> +#include <linux/percpu.h> +#include <linux/slab.h> +#include <linux/suspend.h> +#include <linux/syscore_ops.h> + +#include <linux/irqchip.h> +#include <linux/irqchip/arm-gic-phytium-2500.h> +#include <linux/irqchip/arm-gic-v4.h> + +#include <asm/cputype.h> +#include <asm/exception.h> +#include <asm/smp_plat.h> + +#include "irq-gic-common.h" + +#define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0) +#define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1) +#define ITS_FLAGS_WORKAROUND_CAVIUM_23144 (1ULL << 2) + +#define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0) +#define RDIST_FLAGS_RD_TABLES_PREALLOCATED (1 << 1) + +static u32 lpi_id_bits; + +/* + * We allocate memory for PROPBASE to cover 2 ^ lpi_id_bits LPIs to + * deal with (one configuration byte per interrupt). PENDBASE has to + * be 64kB aligned (one bit per LPI, plus 8192 bits for SPI/PPI/SGI). + */ +#define LPI_NRBITS lpi_id_bits +#define LPI_PROPBASE_SZ ALIGN(BIT(LPI_NRBITS), SZ_64K) +#define LPI_PENDBASE_SZ ALIGN(BIT(LPI_NRBITS) / 8, SZ_64K) + +#define LPI_PROP_DEFAULT_PRIO GICD_INT_DEF_PRI + +/* + * Collection structure - just an ID, and a redistributor address to + * ping. We use one per CPU as a bag of interrupts assigned to this + * CPU. + */ +struct its_collection { + u64 target_address; + u16 col_id; +}; + +/* + * The ITS_BASER structure - contains memory information, cached + * value of BASER register configuration and ITS page size. + */ +struct its_baser { + void *base; + u64 val; + u32 order; + u32 psz; +}; + +struct its_device; + +/* + * The ITS structure - contains most of the infrastructure, with the + * top-level MSI domain, the command queue, the collections, and the + * list of devices writing to it. + * + * dev_alloc_lock has to be taken for device allocations, while the + * spinlock must be taken to parse data structures such as the device + * list. + */ +struct its_node { + raw_spinlock_t lock; + struct mutex dev_alloc_lock; + struct list_head entry; + void __iomem *base; + phys_addr_t phys_base; + struct its_cmd_block *cmd_base; + struct its_cmd_block *cmd_write; + struct its_baser tables[GITS_BASER_NR_REGS]; + struct its_collection *collections; + struct fwnode_handle *fwnode_handle; + u64 (*get_msi_base)(struct its_device *its_dev); + u64 cbaser_save; + u32 ctlr_save; + struct list_head its_device_list; + u64 flags; + unsigned long list_nr; + u32 ite_size; + u32 device_ids; + int numa_node; + unsigned int msi_domain_flags; + u32 pre_its_base; /* for Socionext Synquacer */ + bool is_v4; + int vlpi_redist_offset; +}; + +#define ITS_ITT_ALIGN SZ_256 + +/* The maximum number of VPEID bits supported by VLPI commands */ +#define ITS_MAX_VPEID_BITS (16) +#define ITS_MAX_VPEID (1 << (ITS_MAX_VPEID_BITS)) + +/* Convert page order to size in bytes */ +#define PAGE_ORDER_TO_SIZE(o) (PAGE_SIZE << (o)) + +struct event_lpi_map { + unsigned long *lpi_map; + u16 *col_map; + irq_hw_number_t lpi_base; + int nr_lpis; + raw_spinlock_t vlpi_lock; + struct its_vm *vm; + struct its_vlpi_map *vlpi_maps; + int nr_vlpis; +}; + +/* + * The ITS view of a device - belongs to an ITS, owns an interrupt + * translation table, and a list of interrupts. If it some of its + * LPIs are injected into a guest (GICv4), the event_map.vm field + * indicates which one. + */ +struct its_device { + struct list_head entry; + struct its_node *its; + struct event_lpi_map event_map; + void *itt; + u32 nr_ites; + u32 device_id; + bool shared; +}; + +static struct { + raw_spinlock_t lock; + struct its_device *dev; + struct its_vpe **vpes; + int next_victim; +} vpe_proxy; + +static LIST_HEAD(its_nodes); +static DEFINE_RAW_SPINLOCK(its_lock); +static struct rdists *gic_rdists; +static struct irq_domain *its_parent; + +static unsigned long its_list_map; +static u16 vmovp_seq_num; +static DEFINE_RAW_SPINLOCK(vmovp_lock); + +static DEFINE_IDA(its_vpeid_ida); + +#define gic_data_rdist() (raw_cpu_ptr(gic_rdists->rdist)) +#define gic_data_rdist_cpu(cpu) (per_cpu_ptr(gic_rdists->rdist, cpu)) +#define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) +#define gic_data_rdist_vlpi_base() (gic_data_rdist_rd_base() + SZ_128K) + +static u16 get_its_list(struct its_vm *vm) +{ + struct its_node *its; + unsigned long its_list = 0; + + list_for_each_entry(its, &its_nodes, entry) { + if (!its->is_v4) + continue; + + if (vm->vlpi_count[its->list_nr]) + __set_bit(its->list_nr, &its_list); + } + + return (u16)its_list; +} + +static struct its_collection *dev_event_to_col(struct its_device *its_dev, + u32 event) +{ + struct its_node *its = its_dev->its; + + return its->collections + its_dev->event_map.col_map[event]; +} + +static struct its_collection *valid_col(struct its_collection *col) +{ + if (WARN_ON_ONCE(col->target_address & GENMASK_ULL(15, 0))) + return NULL; + + return col; +} + +static struct its_vpe *valid_vpe(struct its_node *its, struct its_vpe *vpe) +{ + if (valid_col(its->collections + vpe->col_idx)) + return vpe; + + return NULL; +} + +/* + * ITS command descriptors - parameters to be encoded in a command + * block. + */ +struct its_cmd_desc { + union { + struct { + struct its_device *dev; + u32 event_id; + } its_inv_cmd; + + struct { + struct its_device *dev; + u32 event_id; + } its_clear_cmd; + + struct { + struct its_device *dev; + u32 event_id; + } its_int_cmd; + + struct { + struct its_device *dev; + int valid; + } its_mapd_cmd; + + struct { + struct its_collection *col; + int valid; + } its_mapc_cmd; + + struct { + struct its_device *dev; + u32 phys_id; + u32 event_id; + } its_mapti_cmd; + + struct { + struct its_device *dev; + struct its_collection *col; + u32 event_id; + } its_movi_cmd; + + struct { + struct its_device *dev; + u32 event_id; + } its_discard_cmd; + + struct { + struct its_collection *col; + } its_invall_cmd; + + struct { + struct its_vpe *vpe; + } its_vinvall_cmd; + + struct { + struct its_vpe *vpe; + struct its_collection *col; + bool valid; + } its_vmapp_cmd; + + struct { + struct its_vpe *vpe; + struct its_device *dev; + u32 virt_id; + u32 event_id; + bool db_enabled; + } its_vmapti_cmd; + + struct { + struct its_vpe *vpe; + struct its_device *dev; + u32 event_id; + bool db_enabled; + } its_vmovi_cmd; + + struct { + struct its_vpe *vpe; + struct its_collection *col; + u16 seq_num; + u16 its_list; + } its_vmovp_cmd; + }; +}; + +/* + * The ITS command block, which is what the ITS actually parses. + */ +struct its_cmd_block { + u64 raw_cmd[4]; +}; + +#define ITS_CMD_QUEUE_SZ SZ_64K +#define ITS_CMD_QUEUE_NR_ENTRIES (ITS_CMD_QUEUE_SZ / sizeof(struct its_cmd_block)) + +typedef struct its_collection *(*its_cmd_builder_t)(struct its_node *, + struct its_cmd_block *, + struct its_cmd_desc *); + +typedef struct its_vpe *(*its_cmd_vbuilder_t)(struct its_node *, + struct its_cmd_block *, + struct its_cmd_desc *); + +static void its_mask_encode(u64 *raw_cmd, u64 val, int h, int l) +{ + u64 mask = GENMASK_ULL(h, l); + *raw_cmd &= ~mask; + *raw_cmd |= (val << l) & mask; +} + +static void its_encode_cmd(struct its_cmd_block *cmd, u8 cmd_nr) +{ + its_mask_encode(&cmd->raw_cmd[0], cmd_nr, 7, 0); +} + +static void its_encode_devid(struct its_cmd_block *cmd, u32 devid) +{ + its_mask_encode(&cmd->raw_cmd[0], devid, 63, 32); +} + +static void its_encode_event_id(struct its_cmd_block *cmd, u32 id) +{ + its_mask_encode(&cmd->raw_cmd[1], id, 31, 0); +} + +static void its_encode_phys_id(struct its_cmd_block *cmd, u32 phys_id) +{ + its_mask_encode(&cmd->raw_cmd[1], phys_id, 63, 32); +} + +static void its_encode_size(struct its_cmd_block *cmd, u8 size) +{ + its_mask_encode(&cmd->raw_cmd[1], size, 4, 0); +} + +static void its_encode_itt(struct its_cmd_block *cmd, u64 itt_addr) +{ + its_mask_encode(&cmd->raw_cmd[2], itt_addr >> 8, 51, 8); +} + +static void its_encode_valid(struct its_cmd_block *cmd, int valid) +{ + its_mask_encode(&cmd->raw_cmd[2], !!valid, 63, 63); +} + +static void its_encode_target(struct its_cmd_block *cmd, u64 target_addr) +{ + its_mask_encode(&cmd->raw_cmd[2], target_addr >> 16, 51, 16); +} + +static void its_encode_collection(struct its_cmd_block *cmd, u16 col) +{ + its_mask_encode(&cmd->raw_cmd[2], col, 15, 0); +} + +static void its_encode_vpeid(struct its_cmd_block *cmd, u16 vpeid) +{ + its_mask_encode(&cmd->raw_cmd[1], vpeid, 47, 32); +} + +static void its_encode_virt_id(struct its_cmd_block *cmd, u32 virt_id) +{ + its_mask_encode(&cmd->raw_cmd[2], virt_id, 31, 0); +} + +static void its_encode_db_phys_id(struct its_cmd_block *cmd, u32 db_phys_id) +{ + its_mask_encode(&cmd->raw_cmd[2], db_phys_id, 63, 32); +} + +static void its_encode_db_valid(struct its_cmd_block *cmd, bool db_valid) +{ + its_mask_encode(&cmd->raw_cmd[2], db_valid, 0, 0); +} + +static void its_encode_seq_num(struct its_cmd_block *cmd, u16 seq_num) +{ + its_mask_encode(&cmd->raw_cmd[0], seq_num, 47, 32); +} + +static void its_encode_its_list(struct its_cmd_block *cmd, u16 its_list) +{ + its_mask_encode(&cmd->raw_cmd[1], its_list, 15, 0); +} + +static void its_encode_vpt_addr(struct its_cmd_block *cmd, u64 vpt_pa) +{ + its_mask_encode(&cmd->raw_cmd[3], vpt_pa >> 16, 51, 16); +} + +static void its_encode_vpt_size(struct its_cmd_block *cmd, u8 vpt_size) +{ + its_mask_encode(&cmd->raw_cmd[3], vpt_size, 4, 0); +} + +static inline void its_fixup_cmd(struct its_cmd_block *cmd) +{ + /* Let's fixup BE commands */ + cmd->raw_cmd[0] = cpu_to_le64(cmd->raw_cmd[0]); + cmd->raw_cmd[1] = cpu_to_le64(cmd->raw_cmd[1]); + cmd->raw_cmd[2] = cpu_to_le64(cmd->raw_cmd[2]); + cmd->raw_cmd[3] = cpu_to_le64(cmd->raw_cmd[3]); +} + +static struct its_collection *its_build_mapd_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + unsigned long itt_addr; + u8 size = ilog2(desc->its_mapd_cmd.dev->nr_ites); + + itt_addr = virt_to_phys(desc->its_mapd_cmd.dev->itt); + itt_addr = ALIGN(itt_addr, ITS_ITT_ALIGN); + + its_encode_cmd(cmd, GITS_CMD_MAPD); + its_encode_devid(cmd, desc->its_mapd_cmd.dev->device_id); + its_encode_size(cmd, size - 1); + its_encode_itt(cmd, itt_addr); + its_encode_valid(cmd, desc->its_mapd_cmd.valid); + + its_fixup_cmd(cmd); + + return NULL; +} + +static struct its_collection *its_build_mapc_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + its_encode_cmd(cmd, GITS_CMD_MAPC); + its_encode_collection(cmd, desc->its_mapc_cmd.col->col_id); + its_encode_target(cmd, desc->its_mapc_cmd.col->target_address); + its_encode_valid(cmd, desc->its_mapc_cmd.valid); + + its_fixup_cmd(cmd); + + return desc->its_mapc_cmd.col; +} + +static struct its_collection *its_build_mapti_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_mapti_cmd.dev, + desc->its_mapti_cmd.event_id); + col->col_id = col->col_id % 64; + + its_encode_cmd(cmd, GITS_CMD_MAPTI); + its_encode_devid(cmd, desc->its_mapti_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_mapti_cmd.event_id); + its_encode_phys_id(cmd, desc->its_mapti_cmd.phys_id); + its_encode_collection(cmd, col->col_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_movi_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_movi_cmd.dev, + desc->its_movi_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_MOVI); + its_encode_devid(cmd, desc->its_movi_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_movi_cmd.event_id); + its_encode_collection(cmd, desc->its_movi_cmd.col->col_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_discard_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_discard_cmd.dev, + desc->its_discard_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_DISCARD); + its_encode_devid(cmd, desc->its_discard_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_discard_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_inv_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_inv_cmd.dev, + desc->its_inv_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_INV); + its_encode_devid(cmd, desc->its_inv_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_inv_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_int_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_int_cmd.dev, + desc->its_int_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_INT); + its_encode_devid(cmd, desc->its_int_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_int_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_clear_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + struct its_collection *col; + + col = dev_event_to_col(desc->its_clear_cmd.dev, + desc->its_clear_cmd.event_id); + + its_encode_cmd(cmd, GITS_CMD_CLEAR); + its_encode_devid(cmd, desc->its_clear_cmd.dev->device_id); + its_encode_event_id(cmd, desc->its_clear_cmd.event_id); + + its_fixup_cmd(cmd); + + return valid_col(col); +} + +static struct its_collection *its_build_invall_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + its_encode_cmd(cmd, GITS_CMD_INVALL); + its_encode_collection(cmd, desc->its_invall_cmd.col->col_id); + + its_fixup_cmd(cmd); + + return NULL; +} + +static struct its_vpe *its_build_vinvall_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + its_encode_cmd(cmd, GITS_CMD_VINVALL); + its_encode_vpeid(cmd, desc->its_vinvall_cmd.vpe->vpe_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vinvall_cmd.vpe); +} + +static struct its_vpe *its_build_vmapp_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + unsigned long vpt_addr; + u64 target; + + vpt_addr = virt_to_phys(page_address(desc->its_vmapp_cmd.vpe->vpt_page)); + target = desc->its_vmapp_cmd.col->target_address + its->vlpi_redist_offset; + + its_encode_cmd(cmd, GITS_CMD_VMAPP); + its_encode_vpeid(cmd, desc->its_vmapp_cmd.vpe->vpe_id); + its_encode_valid(cmd, desc->its_vmapp_cmd.valid); + its_encode_target(cmd, target); + its_encode_vpt_addr(cmd, vpt_addr); + its_encode_vpt_size(cmd, LPI_NRBITS - 1); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vmapp_cmd.vpe); +} + +static struct its_vpe *its_build_vmapti_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + u32 db; + + if (desc->its_vmapti_cmd.db_enabled) + db = desc->its_vmapti_cmd.vpe->vpe_db_lpi; + else + db = 1023; + + its_encode_cmd(cmd, GITS_CMD_VMAPTI); + its_encode_devid(cmd, desc->its_vmapti_cmd.dev->device_id); + its_encode_vpeid(cmd, desc->its_vmapti_cmd.vpe->vpe_id); + its_encode_event_id(cmd, desc->its_vmapti_cmd.event_id); + its_encode_db_phys_id(cmd, db); + its_encode_virt_id(cmd, desc->its_vmapti_cmd.virt_id); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vmapti_cmd.vpe); +} + +static struct its_vpe *its_build_vmovi_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + u32 db; + + if (desc->its_vmovi_cmd.db_enabled) + db = desc->its_vmovi_cmd.vpe->vpe_db_lpi; + else + db = 1023; + + its_encode_cmd(cmd, GITS_CMD_VMOVI); + its_encode_devid(cmd, desc->its_vmovi_cmd.dev->device_id); + its_encode_vpeid(cmd, desc->its_vmovi_cmd.vpe->vpe_id); + its_encode_event_id(cmd, desc->its_vmovi_cmd.event_id); + its_encode_db_phys_id(cmd, db); + its_encode_db_valid(cmd, true); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vmovi_cmd.vpe); +} + +static struct its_vpe *its_build_vmovp_cmd(struct its_node *its, + struct its_cmd_block *cmd, + struct its_cmd_desc *desc) +{ + u64 target; + + target = desc->its_vmovp_cmd.col->target_address + its->vlpi_redist_offset; + its_encode_cmd(cmd, GITS_CMD_VMOVP); + its_encode_seq_num(cmd, desc->its_vmovp_cmd.seq_num); + its_encode_its_list(cmd, desc->its_vmovp_cmd.its_list); + its_encode_vpeid(cmd, desc->its_vmovp_cmd.vpe->vpe_id); + its_encode_target(cmd, target); + + its_fixup_cmd(cmd); + + return valid_vpe(its, desc->its_vmovp_cmd.vpe); +} + +static u64 its_cmd_ptr_to_offset(struct its_node *its, + struct its_cmd_block *ptr) +{ + return (ptr - its->cmd_base) * sizeof(*ptr); +} + +static int its_queue_full(struct its_node *its) +{ + int widx; + int ridx; + + widx = its->cmd_write - its->cmd_base; + ridx = readl_relaxed(its->base + GITS_CREADR) / sizeof(struct its_cmd_block); + + /* This is incredibly unlikely to happen, unless the ITS locks up. */ + if (((widx + 1) % ITS_CMD_QUEUE_NR_ENTRIES) == ridx) + return 1; + + return 0; +} + +static struct its_cmd_block *its_allocate_entry(struct its_node *its) +{ + struct its_cmd_block *cmd; + u32 count = 1000000; /* 1s! */ + + while (its_queue_full(its)) { + count--; + if (!count) { + pr_err_ratelimited("ITS queue not draining\n"); + return NULL; + } + cpu_relax(); + udelay(1); + } + + cmd = its->cmd_write++; + + /* Handle queue wrapping */ + if (its->cmd_write == (its->cmd_base + ITS_CMD_QUEUE_NR_ENTRIES)) + its->cmd_write = its->cmd_base; + + /* Clear command */ + cmd->raw_cmd[0] = 0; + cmd->raw_cmd[1] = 0; + cmd->raw_cmd[2] = 0; + cmd->raw_cmd[3] = 0; + + return cmd; +} + +static struct its_cmd_block *its_post_commands(struct its_node *its) +{ + u64 wr = its_cmd_ptr_to_offset(its, its->cmd_write); + + writel_relaxed(wr, its->base + GITS_CWRITER); + + return its->cmd_write; +} + +static void its_flush_cmd(struct its_node *its, struct its_cmd_block *cmd) +{ + /* + * Make sure the commands written to memory are observable by + * the ITS. + */ + if (its->flags & ITS_FLAGS_CMDQ_NEEDS_FLUSHING) + gic_flush_dcache_to_poc(cmd, sizeof(*cmd)); + else + dsb(ishst); +} + +static int its_wait_for_range_completion(struct its_node *its, + u64 prev_idx, + struct its_cmd_block *to) +{ + u64 rd_idx, to_idx, linear_idx; + u32 count = 1000000; /* 1s! */ + + /* Linearize to_idx if the command set has wrapped around */ + to_idx = its_cmd_ptr_to_offset(its, to); + if (to_idx < prev_idx) + to_idx += ITS_CMD_QUEUE_SZ; + + linear_idx = prev_idx; + + while (1) { + s64 delta; + + rd_idx = readl_relaxed(its->base + GITS_CREADR); + + /* + * Compute the read pointer progress, taking the + * potential wrap-around into account. + */ + delta = rd_idx - prev_idx; + if (rd_idx < prev_idx) + delta += ITS_CMD_QUEUE_SZ; + + linear_idx += delta; + if (linear_idx >= to_idx) + break; + + count--; + if (!count) { + pr_err_ratelimited("ITS queue timeout (%llu %llu)\n", + to_idx, linear_idx); + return -1; + } + prev_idx = rd_idx; + cpu_relax(); + udelay(1); + } + + return 0; +} + +/* Warning, macro hell follows */ +#define BUILD_SINGLE_CMD_FUNC(name, buildtype, synctype, buildfn) \ +void name(struct its_node *its, \ + buildtype builder, \ + struct its_cmd_desc *desc) \ +{ \ + struct its_cmd_block *cmd, *sync_cmd, *next_cmd; \ + synctype *sync_obj; \ + unsigned long flags; \ + u64 rd_idx; \ + \ + raw_spin_lock_irqsave(&its->lock, flags); \ + \ + cmd = its_allocate_entry(its); \ + if (!cmd) { /* We're soooooo screewed... */ \ + raw_spin_unlock_irqrestore(&its->lock, flags); \ + return; \ + } \ + sync_obj = builder(its, cmd, desc); \ + its_flush_cmd(its, cmd); \ + \ + if (sync_obj) { \ + sync_cmd = its_allocate_entry(its); \ + if (!sync_cmd) \ + goto post; \ + \ + buildfn(its, sync_cmd, sync_obj); \ + its_flush_cmd(its, sync_cmd); \ + } \ + \ +post: \ + rd_idx = readl_relaxed(its->base + GITS_CREADR); \ + next_cmd = its_post_commands(its); \ + raw_spin_unlock_irqrestore(&its->lock, flags); \ + \ + if (its_wait_for_range_completion(its, rd_idx, next_cmd)) \ + pr_err_ratelimited("ITS cmd %ps failed\n", builder); \ +} + +static void its_build_sync_cmd(struct its_node *its, + struct its_cmd_block *sync_cmd, + struct its_collection *sync_col) +{ + its_encode_cmd(sync_cmd, GITS_CMD_SYNC); + its_encode_target(sync_cmd, sync_col->target_address); + + its_fixup_cmd(sync_cmd); +} + +static BUILD_SINGLE_CMD_FUNC(its_send_single_command, its_cmd_builder_t, + struct its_collection, its_build_sync_cmd) + +static void its_build_vsync_cmd(struct its_node *its, + struct its_cmd_block *sync_cmd, + struct its_vpe *sync_vpe) +{ + its_encode_cmd(sync_cmd, GITS_CMD_VSYNC); + its_encode_vpeid(sync_cmd, sync_vpe->vpe_id); + + its_fixup_cmd(sync_cmd); +} + +static BUILD_SINGLE_CMD_FUNC(its_send_single_vcommand, its_cmd_vbuilder_t, + struct its_vpe, its_build_vsync_cmd) + +static void its_send_int(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + desc.its_int_cmd.dev = dev; + desc.its_int_cmd.event_id = event_id; + + its_send_single_command(dev->its, its_build_int_cmd, &desc); +} + +static void its_send_clear(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + desc.its_clear_cmd.dev = dev; + desc.its_clear_cmd.event_id = event_id; + + its_send_single_command(dev->its, its_build_clear_cmd, &desc); +} + +static void its_send_inv(struct its_device *dev, u32 event_id) +{ + struct its_cmd_desc desc; + + desc.its_inv_cmd.dev = dev; + desc.its_inv_cmd.event_id = event_id; + + its_send_single_command(dev->its, its_build_inv_cmd, &desc); +} + +static void its_send_mapd(struct its_device *dev, int valid) +{ + struct its_cmd_desc desc; + + desc.its_mapd_cmd.dev = dev; + desc.its_mapd_cmd.valid = !!valid; + + its_send_single_command(dev->its, its_build_mapd_cmd, &desc); +} + +static void its_send_mapc(struct its_node *its, struct its_collection *col, + int valid) +{ + struct its_cmd_desc desc; + + desc.its_mapc_cmd.col = col; + desc.its_mapc_cmd.valid = !!valid; + + its_send_single_command(its, its_build_mapc_cmd, &desc); +} + +static void its_send_mapti(struct its_device *dev, u32 irq_id, u32 id) +{ + struct its_cmd_desc desc; + + desc.its_mapti_cmd.dev = dev; + desc.its_mapti_cmd.phys_id = irq_id; + desc.its_mapti_cmd.event_id = id; + + its_send_single_command(dev->its, its_build_mapti_cmd, &desc); +} + +static void its_send_movi(struct its_device *dev, + struct its_collection *col, u32 id) +{ + struct its_cmd_desc desc; + + desc.its_movi_cmd.dev = dev; + desc.its_movi_cmd.col = col; + desc.its_movi_cmd.event_id = id; + + its_send_single_command(dev->its, its_build_movi_cmd, &desc); +} + +static void its_send_discard(struct its_device *dev, u32 id) +{ + struct its_cmd_desc desc; + + desc.its_discard_cmd.dev = dev; + desc.its_discard_cmd.event_id = id; + + its_send_single_command(dev->its, its_build_discard_cmd, &desc); +} + +static void its_send_invall(struct its_node *its, struct its_collection *col) +{ + struct its_cmd_desc desc; + + desc.its_invall_cmd.col = col; + + its_send_single_command(its, its_build_invall_cmd, &desc); +} + +static void its_send_vmapti(struct its_device *dev, u32 id) +{ + struct its_vlpi_map *map = &dev->event_map.vlpi_maps[id]; + struct its_cmd_desc desc; + + desc.its_vmapti_cmd.vpe = map->vpe; + desc.its_vmapti_cmd.dev = dev; + desc.its_vmapti_cmd.virt_id = map->vintid; + desc.its_vmapti_cmd.event_id = id; + desc.its_vmapti_cmd.db_enabled = map->db_enabled; + + its_send_single_vcommand(dev->its, its_build_vmapti_cmd, &desc); +} + +static void its_send_vmovi(struct its_device *dev, u32 id) +{ + struct its_vlpi_map *map = &dev->event_map.vlpi_maps[id]; + struct its_cmd_desc desc; + + desc.its_vmovi_cmd.vpe = map->vpe; + desc.its_vmovi_cmd.dev = dev; + desc.its_vmovi_cmd.event_id = id; + desc.its_vmovi_cmd.db_enabled = map->db_enabled; + + its_send_single_vcommand(dev->its, its_build_vmovi_cmd, &desc); +} + +static void its_send_vmapp(struct its_node *its, + struct its_vpe *vpe, bool valid) +{ + struct its_cmd_desc desc; + + desc.its_vmapp_cmd.vpe = vpe; + desc.its_vmapp_cmd.valid = valid; + desc.its_vmapp_cmd.col = &its->collections[vpe->col_idx]; + + its_send_single_vcommand(its, its_build_vmapp_cmd, &desc); +} + +static void its_send_vmovp(struct its_vpe *vpe) +{ + struct its_cmd_desc desc = {}; + struct its_node *its; + unsigned long flags; + int col_id = vpe->col_idx; + + desc.its_vmovp_cmd.vpe = vpe; + + if (!its_list_map) { + its = list_first_entry(&its_nodes, struct its_node, entry); + desc.its_vmovp_cmd.col = &its->collections[col_id]; + its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); + return; + } + + /* + * Yet another marvel of the architecture. If using the + * its_list "feature", we need to make sure that all ITSs + * receive all VMOVP commands in the same order. The only way + * to guarantee this is to make vmovp a serialization point. + * + * Wall <-- Head. + */ + raw_spin_lock_irqsave(&vmovp_lock, flags); + + desc.its_vmovp_cmd.seq_num = vmovp_seq_num++; + desc.its_vmovp_cmd.its_list = get_its_list(vpe->its_vm); + + /* Emit VMOVPs */ + list_for_each_entry(its, &its_nodes, entry) { + if (!its->is_v4) + continue; + + if (!vpe->its_vm->vlpi_count[its->list_nr]) + continue; + + desc.its_vmovp_cmd.col = &its->collections[col_id]; + its_send_single_vcommand(its, its_build_vmovp_cmd, &desc); + } + + raw_spin_unlock_irqrestore(&vmovp_lock, flags); +} + +static void its_send_vinvall(struct its_node *its, struct its_vpe *vpe) +{ + struct its_cmd_desc desc; + + desc.its_vinvall_cmd.vpe = vpe; + its_send_single_vcommand(its, its_build_vinvall_cmd, &desc); +} + +/* + * irqchip functions - assumes MSI, mostly. + */ + +static inline u32 its_get_event_id(struct irq_data *d) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + return d->hwirq - its_dev->event_map.lpi_base; +} + +static void lpi_write_config(struct irq_data *d, u8 clr, u8 set) +{ + irq_hw_number_t hwirq; + void *va; + u8 *cfg; + + if (irqd_is_forwarded_to_vcpu(d)) { + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + struct its_vlpi_map *map; + + va = page_address(its_dev->event_map.vm->vprop_page); + map = &its_dev->event_map.vlpi_maps[event]; + hwirq = map->vintid; + + /* Remember the updated property */ + map->properties &= ~clr; + map->properties |= set | LPI_PROP_GROUP1; + } else { + va = gic_rdists->prop_table_va; + hwirq = d->hwirq; + } + + cfg = va + hwirq - 8192; + *cfg &= ~clr; + *cfg |= set | LPI_PROP_GROUP1; + + /* + * Make the above write visible to the redistributors. + * And yes, we're flushing exactly: One. Single. Byte. + * Humpf... + */ + if (gic_rdists->flags & RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING) + gic_flush_dcache_to_poc(cfg, sizeof(*cfg)); + else + dsb(ishst); +} + +static void lpi_update_config(struct irq_data *d, u8 clr, u8 set) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + + lpi_write_config(d, clr, set); + its_send_inv(its_dev, its_get_event_id(d)); +} + +static void its_vlpi_set_doorbell(struct irq_data *d, bool enable) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + + if (its_dev->event_map.vlpi_maps[event].db_enabled == enable) + return; + + its_dev->event_map.vlpi_maps[event].db_enabled = enable; + + /* + * More fun with the architecture: + * + * Ideally, we'd issue a VMAPTI to set the doorbell to its LPI + * value or to 1023, depending on the enable bit. But that + * would be issueing a mapping for an /existing/ DevID+EventID + * pair, which is UNPREDICTABLE. Instead, let's issue a VMOVI + * to the /same/ vPE, using this opportunity to adjust the + * doorbell. Mouahahahaha. We loves it, Precious. + */ + its_send_vmovi(its_dev, event); +} + +static void its_mask_irq(struct irq_data *d) +{ + if (irqd_is_forwarded_to_vcpu(d)) + its_vlpi_set_doorbell(d, false); + + lpi_update_config(d, LPI_PROP_ENABLED, 0); +} + +static void its_unmask_irq(struct irq_data *d) +{ + if (irqd_is_forwarded_to_vcpu(d)) + its_vlpi_set_doorbell(d, true); + + lpi_update_config(d, 0, LPI_PROP_ENABLED); +} + +#define MAX_MARS3_SKT_COUNT 8 + +static int its_cpumask_select(struct its_device *its_dev, + const struct cpumask *mask_val, + const struct cpumask *cpu_mask) +{ + unsigned int skt, skt_id, i; + phys_addr_t its_phys_base; + unsigned int cpu, cpus = 0; + + unsigned int skt_cpu_cnt[MAX_MARS3_SKT_COUNT] = {0}; + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SKT_COUNT)) + skt_cpu_cnt[skt]++; + else if (skt != 0xff) + pr_err("socket address: %d is out of range.", skt); + } + + its_phys_base = its_dev->its->phys_base; + skt_id = (its_phys_base >> 41) & 0x7; + + if (0 != skt_id) { + for (i = 0; i < skt_id; i++) + cpus += skt_cpu_cnt[i]; + } + + cpu = cpumask_any_and(mask_val, cpu_mask); + if ((cpu > cpus) && (cpu < (cpus + skt_cpu_cnt[skt_id]))) + cpus = cpu; + + if (is_kdump_kernel()) { + skt = (cpu_logical_map(cpu) >> 16) & 0xff; + if (skt_id == skt) { + return cpu; + } + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SKT_COUNT)) { + if (skt_id == skt) { + return i; + } + } else if (0xff != skt) { + pr_err("socket address: %d is out of range.", skt); + } + } + } + + return cpus; +} + + +static int its_set_affinity(struct irq_data *d, const struct cpumask *mask_val, + bool force) +{ + unsigned int cpu; + const struct cpumask *cpu_mask = cpu_online_mask; + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_collection *target_col; + u32 id = its_get_event_id(d); + + /* A forwarded interrupt should use irq_set_vcpu_affinity */ + if (irqd_is_forwarded_to_vcpu(d)) + return -EINVAL; + + /* lpi cannot be routed to a redistributor that is on a foreign node */ + if (its_dev->its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { + if (its_dev->its->numa_node >= 0) { + cpu_mask = cpumask_of_node(its_dev->its->numa_node); + if (!cpumask_intersects(mask_val, cpu_mask)) + return -EINVAL; + } + } + + cpu = its_cpumask_select(its_dev, mask_val, cpu_mask); + + if (cpu >= nr_cpu_ids) + return -EINVAL; + + /* don't set the affinity when the target cpu is same as current one */ + if (cpu != its_dev->event_map.col_map[id]) { + target_col = &its_dev->its->collections[cpu]; + its_send_movi(its_dev, target_col, id); + its_dev->event_map.col_map[id] = cpu; + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + } + + return IRQ_SET_MASK_OK_DONE; +} + +static u64 its_irq_get_msi_base(struct its_device *its_dev) +{ + struct its_node *its = its_dev->its; + + return its->phys_base + GITS_TRANSLATER; +} + +static void its_irq_compose_msi_msg(struct irq_data *d, struct msi_msg *msg) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_node *its; + u64 addr; + + its = its_dev->its; + addr = its->get_msi_base(its_dev); + + msg->address_lo = lower_32_bits(addr); + msg->address_hi = upper_32_bits(addr); + msg->data = its_get_event_id(d); +} + +static int its_irq_set_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, + bool state) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + + if (which != IRQCHIP_STATE_PENDING) + return -EINVAL; + + if (state) + its_send_int(its_dev, event); + else + its_send_clear(its_dev, event); + + return 0; +} + +static void its_map_vm(struct its_node *its, struct its_vm *vm) +{ + unsigned long flags; + + /* Not using the ITS list? Everything is always mapped. */ + if (!its_list_map) + return; + + raw_spin_lock_irqsave(&vmovp_lock, flags); + + /* + * If the VM wasn't mapped yet, iterate over the vpes and get + * them mapped now. + */ + vm->vlpi_count[its->list_nr]++; + + if (vm->vlpi_count[its->list_nr] == 1) { + int i; + + for (i = 0; i < vm->nr_vpes; i++) { + struct its_vpe *vpe = vm->vpes[i]; + struct irq_data *d = irq_get_irq_data(vpe->irq); + + /* Map the VPE to the first possible CPU */ + vpe->col_idx = cpumask_first(cpu_online_mask); + its_send_vmapp(its, vpe, true); + its_send_vinvall(its, vpe); + irq_data_update_effective_affinity(d, cpumask_of(vpe->col_idx)); + } + } + + raw_spin_unlock_irqrestore(&vmovp_lock, flags); +} + +static void its_unmap_vm(struct its_node *its, struct its_vm *vm) +{ + unsigned long flags; + + /* Not using the ITS list? Everything is always mapped. */ + if (!its_list_map) + return; + + raw_spin_lock_irqsave(&vmovp_lock, flags); + + if (!--vm->vlpi_count[its->list_nr]) { + int i; + + for (i = 0; i < vm->nr_vpes; i++) + its_send_vmapp(its, vm->vpes[i], false); + } + + raw_spin_unlock_irqrestore(&vmovp_lock, flags); +} + +static int its_vlpi_map(struct irq_data *d, struct its_cmd_info *info) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + int ret = 0; + + if (!info->map) + return -EINVAL; + + raw_spin_lock(&its_dev->event_map.vlpi_lock); + + if (!its_dev->event_map.vm) { + struct its_vlpi_map *maps; + + maps = kcalloc(its_dev->event_map.nr_lpis, sizeof(*maps), + GFP_ATOMIC); + if (!maps) { + ret = -ENOMEM; + goto out; + } + + its_dev->event_map.vm = info->map->vm; + its_dev->event_map.vlpi_maps = maps; + } else if (its_dev->event_map.vm != info->map->vm) { + ret = -EINVAL; + goto out; + } + + /* Get our private copy of the mapping information */ + its_dev->event_map.vlpi_maps[event] = *info->map; + + if (irqd_is_forwarded_to_vcpu(d)) { + /* Already mapped, move it around */ + its_send_vmovi(its_dev, event); + } else { + /* Ensure all the VPEs are mapped on this ITS */ + its_map_vm(its_dev->its, info->map->vm); + + /* + * Flag the interrupt as forwarded so that we can + * start poking the virtual property table. + */ + irqd_set_forwarded_to_vcpu(d); + + /* Write out the property to the prop table */ + lpi_write_config(d, 0xff, info->map->properties); + + /* Drop the physical mapping */ + its_send_discard(its_dev, event); + + /* and install the virtual one */ + its_send_vmapti(its_dev, event); + + /* Increment the number of VLPIs */ + its_dev->event_map.nr_vlpis++; + } + +out: + raw_spin_unlock(&its_dev->event_map.vlpi_lock); + return ret; +} + +static int its_vlpi_get(struct irq_data *d, struct its_cmd_info *info) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + int ret = 0; + + raw_spin_lock(&its_dev->event_map.vlpi_lock); + + if (!its_dev->event_map.vm || + !its_dev->event_map.vlpi_maps[event].vm) { + ret = -EINVAL; + goto out; + } + + /* Copy our mapping information to the incoming request */ + *info->map = its_dev->event_map.vlpi_maps[event]; + +out: + raw_spin_unlock(&its_dev->event_map.vlpi_lock); + return ret; +} + +static int its_vlpi_unmap(struct irq_data *d) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + int ret = 0; + + raw_spin_lock(&its_dev->event_map.vlpi_lock); + + if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) { + ret = -EINVAL; + goto out; + } + + /* Drop the virtual mapping */ + its_send_discard(its_dev, event); + + /* and restore the physical one */ + irqd_clr_forwarded_to_vcpu(d); + its_send_mapti(its_dev, d->hwirq, event); + lpi_update_config(d, 0xff, (LPI_PROP_DEFAULT_PRIO | + LPI_PROP_ENABLED | + LPI_PROP_GROUP1)); + + /* Potentially unmap the VM from this ITS */ + its_unmap_vm(its_dev->its, its_dev->event_map.vm); + + /* + * Drop the refcount and make the device available again if + * this was the last VLPI. + */ + if (!--its_dev->event_map.nr_vlpis) { + its_dev->event_map.vm = NULL; + kfree(its_dev->event_map.vlpi_maps); + } + +out: + raw_spin_unlock(&its_dev->event_map.vlpi_lock); + return ret; +} + +static int its_vlpi_prop_update(struct irq_data *d, struct its_cmd_info *info) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + + if (!its_dev->event_map.vm || !irqd_is_forwarded_to_vcpu(d)) + return -EINVAL; + + if (info->cmd_type == PROP_UPDATE_AND_INV_VLPI) + lpi_update_config(d, 0xff, info->config); + else + lpi_write_config(d, 0xff, info->config); + its_vlpi_set_doorbell(d, !!(info->config & LPI_PROP_ENABLED)); + + return 0; +} + +static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_cmd_info *info = vcpu_info; + + /* Need a v4 ITS */ + if (!its_dev->its->is_v4) + return -EINVAL; + + /* Unmap request? */ + if (!info) + return its_vlpi_unmap(d); + + switch (info->cmd_type) { + case MAP_VLPI: + return its_vlpi_map(d, info); + + case GET_VLPI: + return its_vlpi_get(d, info); + + case PROP_UPDATE_VLPI: + case PROP_UPDATE_AND_INV_VLPI: + return its_vlpi_prop_update(d, info); + + default: + return -EINVAL; + } +} + +static int its_irq_retrigger(struct irq_data *d) +{ + return !its_irq_set_irqchip_state(d, IRQCHIP_STATE_PENDING, true); +} + +static struct irq_chip its_irq_chip = { + .name = "ITS", + .irq_mask = its_mask_irq, + .irq_unmask = its_unmask_irq, + .irq_eoi = irq_chip_eoi_parent, + .irq_set_affinity = its_set_affinity, + .irq_compose_msi_msg = its_irq_compose_msi_msg, + .irq_set_irqchip_state = its_irq_set_irqchip_state, + .irq_retrigger = its_irq_retrigger, + .irq_set_vcpu_affinity = its_irq_set_vcpu_affinity, +}; + + +/* + * How we allocate LPIs: + * + * lpi_range_list contains ranges of LPIs that are to available to + * allocate from. To allocate LPIs, just pick the first range that + * fits the required allocation, and reduce it by the required + * amount. Once empty, remove the range from the list. + * + * To free a range of LPIs, add a free range to the list, sort it and + * merge the result if the new range happens to be adjacent to an + * already free block. + * + * The consequence of the above is that allocation is cost is low, but + * freeing is expensive. We assumes that freeing rarely occurs. + */ +#define ITS_MAX_LPI_NRBITS 16 /* 64K LPIs */ + +static DEFINE_MUTEX(lpi_range_lock); +static LIST_HEAD(lpi_range_list); + +struct lpi_range { + struct list_head entry; + u32 base_id; + u32 span; +}; + +static struct lpi_range *mk_lpi_range(u32 base, u32 span) +{ + struct lpi_range *range; + + range = kzalloc(sizeof(*range), GFP_KERNEL); + if (range) { + INIT_LIST_HEAD(&range->entry); + range->base_id = base; + range->span = span; + } + + return range; +} + +static int lpi_range_cmp(void *priv, struct list_head *a, struct list_head *b) +{ + struct lpi_range *ra, *rb; + + ra = container_of(a, struct lpi_range, entry); + rb = container_of(b, struct lpi_range, entry); + + return ra->base_id - rb->base_id; +} + +static void merge_lpi_ranges(void) +{ + struct lpi_range *range, *tmp; + + list_for_each_entry_safe(range, tmp, &lpi_range_list, entry) { + if (!list_is_last(&range->entry, &lpi_range_list) && + (tmp->base_id == (range->base_id + range->span))) { + tmp->base_id = range->base_id; + tmp->span += range->span; + list_del(&range->entry); + kfree(range); + } + } +} + +static int alloc_lpi_range(u32 nr_lpis, u32 *base) +{ + struct lpi_range *range, *tmp; + int err = -ENOSPC; + + mutex_lock(&lpi_range_lock); + + list_for_each_entry_safe(range, tmp, &lpi_range_list, entry) { + if (range->span >= nr_lpis) { + *base = range->base_id; + range->base_id += nr_lpis; + range->span -= nr_lpis; + + if (range->span == 0) { + list_del(&range->entry); + kfree(range); + } + + err = 0; + break; + } + } + + mutex_unlock(&lpi_range_lock); + + pr_debug("ITS: alloc %u:%u\n", *base, nr_lpis); + return err; +} + +static int free_lpi_range(u32 base, u32 nr_lpis) +{ + struct lpi_range *new; + int err = 0; + + mutex_lock(&lpi_range_lock); + + new = mk_lpi_range(base, nr_lpis); + if (!new) { + err = -ENOMEM; + goto out; + } + + list_add(&new->entry, &lpi_range_list); + list_sort(NULL, &lpi_range_list, lpi_range_cmp); + merge_lpi_ranges(); +out: + mutex_unlock(&lpi_range_lock); + return err; +} + +static int __init its_lpi_init(u32 id_bits) +{ + u32 lpis = (1UL << id_bits) - 8192; + u32 numlpis; + int err; + + numlpis = 1UL << GICD_TYPER_NUM_LPIS(gic_rdists->gicd_typer); + + if (numlpis > 2 && !WARN_ON(numlpis > lpis)) { + lpis = numlpis; + pr_info("ITS: Using hypervisor restricted LPI range [%u]\n", + lpis); + } + + /* + * Initializing the allocator is just the same as freeing the + * full range of LPIs. + */ + err = free_lpi_range(8192, lpis); + pr_debug("ITS: Allocator initialized for %u LPIs\n", lpis); + return err; +} + +static unsigned long *its_lpi_alloc(int nr_irqs, u32 *base, int *nr_ids) +{ + unsigned long *bitmap = NULL; + int err = 0; + + do { + err = alloc_lpi_range(nr_irqs, base); + if (!err) + break; + + nr_irqs /= 2; + } while (nr_irqs > 0); + + if (!nr_irqs) + err = -ENOSPC; + + if (err) + goto out; + + bitmap = kcalloc(BITS_TO_LONGS(nr_irqs), sizeof (long), GFP_ATOMIC); + if (!bitmap) + goto out; + + *nr_ids = nr_irqs; + +out: + if (!bitmap) + *base = *nr_ids = 0; + + return bitmap; +} + +static void its_lpi_free(unsigned long *bitmap, u32 base, u32 nr_ids) +{ + WARN_ON(free_lpi_range(base, nr_ids)); + kfree(bitmap); +} + +static void gic_reset_prop_table(void *va) +{ + /* Priority 0xa0, Group-1, disabled */ + memset(va, LPI_PROP_DEFAULT_PRIO | LPI_PROP_GROUP1, LPI_PROPBASE_SZ); + + /* Make sure the GIC will observe the written configuration */ + gic_flush_dcache_to_poc(va, LPI_PROPBASE_SZ); +} + +static struct page *its_allocate_prop_table(gfp_t gfp_flags) +{ + struct page *prop_page; + + prop_page = alloc_pages(gfp_flags, get_order(LPI_PROPBASE_SZ)); + if (!prop_page) + return NULL; + + gic_reset_prop_table(page_address(prop_page)); + + return prop_page; +} + +static void its_free_prop_table(struct page *prop_page) +{ + free_pages((unsigned long)page_address(prop_page), + get_order(LPI_PROPBASE_SZ)); +} + +static int __init its_setup_lpi_prop_table(void) +{ + if (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) { + u64 val; + + val = gicr_read_propbaser(gic_data_rdist_rd_base() + GICR_PROPBASER); + lpi_id_bits = (val & GICR_PROPBASER_IDBITS_MASK) + 1; + + gic_rdists->prop_table_pa = val & GENMASK_ULL(51, 12); + gic_rdists->prop_table_va = memremap(gic_rdists->prop_table_pa, + LPI_PROPBASE_SZ, + MEMREMAP_WB); + gic_reset_prop_table(gic_rdists->prop_table_va); + } else { + struct page *page; + + lpi_id_bits = min_t(u32, + GICD_TYPER_ID_BITS(gic_rdists->gicd_typer), + ITS_MAX_LPI_NRBITS); + page = its_allocate_prop_table(GFP_NOWAIT); + if (!page) { + pr_err("Failed to allocate PROPBASE\n"); + return -ENOMEM; + } + + gic_rdists->prop_table_pa = page_to_phys(page); + gic_rdists->prop_table_va = page_address(page); + } + + pr_info("GIC-2500: using LPI property table @%pa\n", + &gic_rdists->prop_table_pa); + + return its_lpi_init(lpi_id_bits); +} + +static const char *its_base_type_string[] = { + [GITS_BASER_TYPE_DEVICE] = "Devices", + [GITS_BASER_TYPE_VCPU] = "Virtual CPUs", + [GITS_BASER_TYPE_RESERVED3] = "Reserved (3)", + [GITS_BASER_TYPE_COLLECTION] = "Interrupt Collections", + [GITS_BASER_TYPE_RESERVED5] = "Reserved (5)", + [GITS_BASER_TYPE_RESERVED6] = "Reserved (6)", + [GITS_BASER_TYPE_RESERVED7] = "Reserved (7)", +}; + +static u64 its_read_baser(struct its_node *its, struct its_baser *baser) +{ + u32 idx = baser - its->tables; + + return gits_read_baser(its->base + GITS_BASER + (idx << 3)); +} + +static void its_write_baser(struct its_node *its, struct its_baser *baser, + u64 val) +{ + u32 idx = baser - its->tables; + + gits_write_baser(val, its->base + GITS_BASER + (idx << 3)); + baser->val = its_read_baser(its, baser); +} + +static int its_setup_baser(struct its_node *its, struct its_baser *baser, + u64 cache, u64 shr, u32 order, bool indirect) +{ + u64 val = its_read_baser(its, baser); + u64 esz = GITS_BASER_ENTRY_SIZE(val); + u64 type = GITS_BASER_TYPE(val); + u64 baser_phys, tmp; + u32 alloc_pages, psz; + void *base; + + psz = baser->psz; + alloc_pages = (PAGE_ORDER_TO_SIZE(order) / psz); + if (alloc_pages > GITS_BASER_PAGES_MAX) { + pr_warn("ITS@%pa: %s too large, reduce ITS pages %u->%u\n", + &its->phys_base, its_base_type_string[type], + alloc_pages, GITS_BASER_PAGES_MAX); + alloc_pages = GITS_BASER_PAGES_MAX; + order = get_order(GITS_BASER_PAGES_MAX * psz); + } + + base = (void *)page_address(alloc_pages_node(its->numa_node, + GFP_KERNEL | __GFP_ZERO, order)); + if (!base) + return -ENOMEM; + + baser_phys = virt_to_phys(base); + + /* Check if the physical address of the memory is above 48bits */ + if (IS_ENABLED(CONFIG_ARM64_64K_PAGES) && (baser_phys >> 48)) { + + /* 52bit PA is supported only when PageSize=64K */ + if (psz != SZ_64K) { + pr_err("ITS: no 52bit PA support when psz=%d\n", psz); + free_pages((unsigned long)base, order); + return -ENXIO; + } + + /* Convert 52bit PA to 48bit field */ + baser_phys = GITS_BASER_PHYS_52_to_48(baser_phys); + } + +retry_baser: + val = (baser_phys | + (type << GITS_BASER_TYPE_SHIFT) | + ((esz - 1) << GITS_BASER_ENTRY_SIZE_SHIFT) | + ((alloc_pages - 1) << GITS_BASER_PAGES_SHIFT) | + cache | + shr | + GITS_BASER_VALID); + + val |= indirect ? GITS_BASER_INDIRECT : 0x0; + + switch (psz) { + case SZ_4K: + val |= GITS_BASER_PAGE_SIZE_4K; + break; + case SZ_16K: + val |= GITS_BASER_PAGE_SIZE_16K; + break; + case SZ_64K: + val |= GITS_BASER_PAGE_SIZE_64K; + break; + } + + its_write_baser(its, baser, val); + tmp = baser->val; + + if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) { + /* + * Shareability didn't stick. Just use + * whatever the read reported, which is likely + * to be the only thing this redistributor + * supports. If that's zero, make it + * non-cacheable as well. + */ + shr = tmp & GITS_BASER_SHAREABILITY_MASK; + if (!shr) { + cache = GITS_BASER_nC; + gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order)); + } + goto retry_baser; + } + + if (val != tmp) { + pr_err("ITS@%pa: %s doesn't stick: %llx %llx\n", + &its->phys_base, its_base_type_string[type], + val, tmp); + free_pages((unsigned long)base, order); + return -ENXIO; + } + + baser->order = order; + baser->base = base; + baser->psz = psz; + tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz; + + pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n", + &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp), + its_base_type_string[type], + (unsigned long)virt_to_phys(base), + indirect ? "indirect" : "flat", (int)esz, + psz / SZ_1K, (int)shr >> GITS_BASER_SHAREABILITY_SHIFT); + + return 0; +} + +static bool its_parse_indirect_baser(struct its_node *its, + struct its_baser *baser, + u32 *order, u32 ids) +{ + u64 tmp = its_read_baser(its, baser); + u64 type = GITS_BASER_TYPE(tmp); + u64 esz = GITS_BASER_ENTRY_SIZE(tmp); + u64 val = GITS_BASER_InnerShareable | GITS_BASER_RaWaWb; + u32 new_order = *order; + u32 psz = baser->psz; + bool indirect = false; + + /* No need to enable Indirection if memory requirement < (psz*2)bytes */ + if ((esz << ids) > (psz * 2)) { + /* + * Find out whether hw supports a single or two-level table by + * table by reading bit at offset '62' after writing '1' to it. + */ + its_write_baser(its, baser, val | GITS_BASER_INDIRECT); + indirect = !!(baser->val & GITS_BASER_INDIRECT); + + if (indirect) { + /* + * The size of the lvl2 table is equal to ITS page size + * which is 'psz'. For computing lvl1 table size, + * subtract ID bits that sparse lvl2 table from 'ids' + * which is reported by ITS hardware times lvl1 table + * entry size. + */ + ids -= ilog2(psz / (int)esz); + esz = GITS_LVL1_ENTRY_SIZE; + } + } + + /* + * Allocate as many entries as required to fit the + * range of device IDs that the ITS can grok... The ID + * space being incredibly sparse, this results in a + * massive waste of memory if two-level device table + * feature is not supported by hardware. + */ + new_order = max_t(u32, get_order(esz << ids), new_order); + if (new_order >= MAX_ORDER) { + new_order = MAX_ORDER - 1; + ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz); + pr_warn("ITS@%pa: %s Table too large, reduce ids %u->%u\n", + &its->phys_base, its_base_type_string[type], + its->device_ids, ids); + } + + *order = new_order; + + return indirect; +} + +static void its_free_tables(struct its_node *its) +{ + int i; + + for (i = 0; i < GITS_BASER_NR_REGS; i++) { + if (its->tables[i].base) { + free_pages((unsigned long)its->tables[i].base, + its->tables[i].order); + its->tables[i].base = NULL; + } + } +} + +static int its_probe_baser_psz(struct its_node *its, struct its_baser *baser) +{ + u64 psz = SZ_64K; + + while (psz) { + u64 val, gpsz; + + val = its_read_baser(its, baser); + val &= ~GITS_BASER_PAGE_SIZE_MASK; + + switch (psz) { + case SZ_64K: + gpsz = GITS_BASER_PAGE_SIZE_64K; + break; + case SZ_16K: + gpsz = GITS_BASER_PAGE_SIZE_16K; + break; + case SZ_4K: + default: + gpsz = GITS_BASER_PAGE_SIZE_4K; + break; + } + + gpsz >>= GITS_BASER_PAGE_SIZE_SHIFT; + + val |= FIELD_PREP(GITS_BASER_PAGE_SIZE_MASK, gpsz); + its_write_baser(its, baser, val); + + if (FIELD_GET(GITS_BASER_PAGE_SIZE_MASK, baser->val) == gpsz) + break; + + switch (psz) { + case SZ_64K: + psz = SZ_16K; + break; + case SZ_16K: + psz = SZ_4K; + break; + case SZ_4K: + default: + return -1; + } + } + + baser->psz = psz; + return 0; +} + +static int its_alloc_tables(struct its_node *its) +{ + u64 shr = GITS_BASER_InnerShareable; + u64 cache = GITS_BASER_RaWaWb; + int err, i; + + if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_22375) + /* erratum 24313: ignore memory access type */ + cache = GITS_BASER_nCnB; + + for (i = 0; i < GITS_BASER_NR_REGS; i++) { + struct its_baser *baser = its->tables + i; + u64 val = its_read_baser(its, baser); + u64 type = GITS_BASER_TYPE(val); + bool indirect = false; + u32 order; + + if (type == GITS_BASER_TYPE_NONE) + continue; + + if (its_probe_baser_psz(its, baser)) { + its_free_tables(its); + return -ENXIO; + } + + order = get_order(baser->psz); + + switch (type) { + case GITS_BASER_TYPE_DEVICE: + indirect = its_parse_indirect_baser(its, baser, &order, + its->device_ids); + break; + + case GITS_BASER_TYPE_VCPU: + indirect = its_parse_indirect_baser(its, baser, &order, + ITS_MAX_VPEID_BITS); + break; + } + + err = its_setup_baser(its, baser, cache, shr, order, indirect); + if (err < 0) { + its_free_tables(its); + return err; + } + + /* Update settings which will be used for next BASERn */ + cache = baser->val & GITS_BASER_CACHEABILITY_MASK; + shr = baser->val & GITS_BASER_SHAREABILITY_MASK; + } + + return 0; +} + +static int its_alloc_collections(struct its_node *its) +{ + int i; + + its->collections = kcalloc(nr_cpu_ids, sizeof(*its->collections), + GFP_KERNEL); + if (!its->collections) + return -ENOMEM; + + for (i = 0; i < nr_cpu_ids; i++) + its->collections[i].target_address = ~0ULL; + + return 0; +} + +static struct page *its_allocate_pending_table(gfp_t gfp_flags) +{ + struct page *pend_page; + + pend_page = alloc_pages(gfp_flags | __GFP_ZERO, + get_order(LPI_PENDBASE_SZ)); + if (!pend_page) + return NULL; + + /* Make sure the GIC will observe the zero-ed page */ + gic_flush_dcache_to_poc(page_address(pend_page), LPI_PENDBASE_SZ); + + return pend_page; +} + +static void its_free_pending_table(struct page *pt) +{ + free_pages((unsigned long)page_address(pt), get_order(LPI_PENDBASE_SZ)); +} + +/* + * Booting with kdump and LPIs enabled is generally fine. + */ +static bool enabled_lpis_allowed(void) +{ + /* Allow a kdump kernel */ + if (is_kdump_kernel()) + return true; + + return false; +} + +static int __init allocate_lpi_tables(void) +{ + u64 val; + int err, cpu; + + /* + * If LPIs are enabled while we run this from the boot CPU, + * flag the RD tables as pre-allocated if the stars do align. + */ + val = readl_relaxed(gic_data_rdist_rd_base() + GICR_CTLR); + if ((val & GICR_CTLR_ENABLE_LPIS) && enabled_lpis_allowed()) { + gic_rdists->flags |= (RDIST_FLAGS_RD_TABLES_PREALLOCATED | + RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING); + pr_info("GIC-2500: Using preallocated redistributor tables\n"); + } + + err = its_setup_lpi_prop_table(); + if (err) + return err; + + /* + * We allocate all the pending tables anyway, as we may have a + * mix of RDs that have had LPIs enabled, and some that + * don't. We'll free the unused ones as each CPU comes online. + */ + for_each_possible_cpu(cpu) { + struct page *pend_page; + + pend_page = its_allocate_pending_table(GFP_NOWAIT); + if (!pend_page) { + pr_err("Failed to allocate PENDBASE for CPU%d\n", cpu); + return -ENOMEM; + } + + gic_data_rdist_cpu(cpu)->pend_page = pend_page; + } + + return 0; +} + +static u64 its_clear_vpend_valid(void __iomem *vlpi_base) +{ + u32 count = 1000000; /* 1s! */ + bool clean; + u64 val; + + val = gits_read_vpendbaser(vlpi_base + GICR_VPENDBASER); + val &= ~GICR_VPENDBASER_Valid; + gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); + + do { + val = gits_read_vpendbaser(vlpi_base + GICR_VPENDBASER); + clean = !(val & GICR_VPENDBASER_Dirty); + if (!clean) { + count--; + cpu_relax(); + udelay(1); + } + } while (!clean && count); + + return val; +} + +static void its_cpu_init_lpis(void) +{ + void __iomem *rbase = gic_data_rdist_rd_base(); + struct page *pend_page; + phys_addr_t paddr; + u64 val, tmp; + + if (gic_data_rdist()->lpi_enabled) + return; + + val = readl_relaxed(rbase + GICR_CTLR); + if ((gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) && + (val & GICR_CTLR_ENABLE_LPIS)) { + + paddr = gicr_read_pendbaser(rbase + GICR_PENDBASER); + paddr &= GENMASK_ULL(51, 16); + + its_free_pending_table(gic_data_rdist()->pend_page); + gic_data_rdist()->pend_page = NULL; + + goto out; + } + + pend_page = gic_data_rdist()->pend_page; + paddr = page_to_phys(pend_page); + + /* set PROPBASE */ + val = (gic_rdists->prop_table_pa | + GICR_PROPBASER_InnerShareable | + GICR_PROPBASER_RaWaWb | + ((LPI_NRBITS - 1) & GICR_PROPBASER_IDBITS_MASK)); + + gicr_write_propbaser(val, rbase + GICR_PROPBASER); + tmp = gicr_read_propbaser(rbase + GICR_PROPBASER); + + if ((tmp ^ val) & GICR_PROPBASER_SHAREABILITY_MASK) { + if (!(tmp & GICR_PROPBASER_SHAREABILITY_MASK)) { + /* + * The HW reports non-shareable, we must + * remove the cacheability attributes as + * well. + */ + val &= ~(GICR_PROPBASER_SHAREABILITY_MASK | + GICR_PROPBASER_CACHEABILITY_MASK); + val |= GICR_PROPBASER_nC; + gicr_write_propbaser(val, rbase + GICR_PROPBASER); + } + pr_info_once("GIC: using cache flushing for LPI property table\n"); + gic_rdists->flags |= RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING; + } + + /* set PENDBASE */ + val = (page_to_phys(pend_page) | + GICR_PENDBASER_InnerShareable | + GICR_PENDBASER_RaWaWb); + + gicr_write_pendbaser(val, rbase + GICR_PENDBASER); + tmp = gicr_read_pendbaser(rbase + GICR_PENDBASER); + + if (!(tmp & GICR_PENDBASER_SHAREABILITY_MASK)) { + /* + * The HW reports non-shareable, we must remove the + * cacheability attributes as well. + */ + val &= ~(GICR_PENDBASER_SHAREABILITY_MASK | + GICR_PENDBASER_CACHEABILITY_MASK); + val |= GICR_PENDBASER_nC; + gicr_write_pendbaser(val, rbase + GICR_PENDBASER); + } + + /* Enable LPIs */ + val = readl_relaxed(rbase + GICR_CTLR); + val |= GICR_CTLR_ENABLE_LPIS; + writel_relaxed(val, rbase + GICR_CTLR); + + if (gic_rdists->has_vlpis) { + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + + /* + * It's possible for CPU to receive VLPIs before it is + * sheduled as a vPE, especially for the first CPU, and the + * VLPI with INTID larger than 2^(IDbits+1) will be considered + * as out of range and dropped by GIC. + * So we initialize IDbits to known value to avoid VLPI drop. + */ + val = (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; + pr_debug("GICv4: CPU%d: Init IDbits to 0x%llx for GICR_VPROPBASER\n", + smp_processor_id(), val); + gits_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); + + /* + * Also clear Valid bit of GICR_VPENDBASER, in case some + * ancient programming gets left in and has possibility of + * corrupting memory. + */ + val = its_clear_vpend_valid(vlpi_base); + WARN_ON(val & GICR_VPENDBASER_Dirty); + } + + /* Make sure the GIC has seen the above */ + dsb(sy); +out: + gic_data_rdist()->lpi_enabled = true; + pr_info("GIC-2500: CPU%d: using %s LPI pending table @%pa\n", + smp_processor_id(), + gic_data_rdist()->pend_page ? "allocated" : "reserved", + &paddr); +} + +static void its_cpu_init_collection(struct its_node *its) +{ + int cpu = smp_processor_id(); + unsigned long mpid, skt_id; + phys_addr_t its_phys_base; + u64 target; + + /* avoid cross node collections and its mapping */ + if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_23144) { + struct device_node *cpu_node; + + cpu_node = of_get_cpu_node(cpu, NULL); + if (its->numa_node != NUMA_NO_NODE && + its->numa_node != of_node_to_nid(cpu_node)) + return; + } + mpid = cpu_logical_map(cpu); + its_phys_base = its->phys_base; + skt_id = (its_phys_base >> 41) & 0x7; + + /* + * We now have to bind each collection to its target + * redistributor. + */ + if (gic_read_typer(its->base + GITS_TYPER) & GITS_TYPER_PTA) { + /* + * This ITS wants the physical address of the + * redistributor. + */ + target = gic_data_rdist()->phys_base; + } else { + /* This ITS wants a linear CPU number. */ + target = gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER); + target = GICR_TYPER_CPU_NUMBER(target) << 16; + } + + /* Perform collection mapping */ + its->collections[cpu].target_address = target; + its->collections[cpu].col_id = cpu % 64; + + its_send_mapc(its, &its->collections[cpu], 1); + its_send_invall(its, &its->collections[cpu]); +} + +static void its_cpu_init_collections(void) +{ + struct its_node *its; + + raw_spin_lock(&its_lock); + + list_for_each_entry(its, &its_nodes, entry) + its_cpu_init_collection(its); + + raw_spin_unlock(&its_lock); +} + +static struct its_device *its_find_device(struct its_node *its, u32 dev_id) +{ + struct its_device *its_dev = NULL, *tmp; + unsigned long flags; + + raw_spin_lock_irqsave(&its->lock, flags); + + list_for_each_entry(tmp, &its->its_device_list, entry) { + if (tmp->device_id == dev_id) { + its_dev = tmp; + break; + } + } + + raw_spin_unlock_irqrestore(&its->lock, flags); + + return its_dev; +} + +static struct its_baser *its_get_baser(struct its_node *its, u32 type) +{ + int i; + + for (i = 0; i < GITS_BASER_NR_REGS; i++) { + if (GITS_BASER_TYPE(its->tables[i].val) == type) + return &its->tables[i]; + } + + return NULL; +} + +static bool its_alloc_table_entry(struct its_node *its, + struct its_baser *baser, u32 id) +{ + struct page *page; + u32 esz, idx; + __le64 *table; + + /* Don't allow device id that exceeds single, flat table limit */ + esz = GITS_BASER_ENTRY_SIZE(baser->val); + if (!(baser->val & GITS_BASER_INDIRECT)) + return (id < (PAGE_ORDER_TO_SIZE(baser->order) / esz)); + + /* Compute 1st level table index & check if that exceeds table limit */ + idx = id >> ilog2(baser->psz / esz); + if (idx >= (PAGE_ORDER_TO_SIZE(baser->order) / GITS_LVL1_ENTRY_SIZE)) + return false; + + table = baser->base; + + /* Allocate memory for 2nd level table */ + if (!table[idx]) { + page = alloc_pages_node(its->numa_node, GFP_KERNEL | __GFP_ZERO, + get_order(baser->psz)); + if (!page) + return false; + + /* Flush Lvl2 table to PoC if hw doesn't support coherency */ + if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) + gic_flush_dcache_to_poc(page_address(page), baser->psz); + + table[idx] = cpu_to_le64(page_to_phys(page) | GITS_BASER_VALID); + + /* Flush Lvl1 entry to PoC if hw doesn't support coherency */ + if (!(baser->val & GITS_BASER_SHAREABILITY_MASK)) + gic_flush_dcache_to_poc(table + idx, GITS_LVL1_ENTRY_SIZE); + + /* Ensure updated table contents are visible to ITS hardware */ + dsb(sy); + } + + return true; +} + +static bool its_alloc_device_table(struct its_node *its, u32 dev_id) +{ + struct its_baser *baser; + + baser = its_get_baser(its, GITS_BASER_TYPE_DEVICE); + + /* Don't allow device id that exceeds ITS hardware limit */ + if (!baser) + return (ilog2(dev_id) < its->device_ids); + + return its_alloc_table_entry(its, baser, dev_id); +} + +static bool its_alloc_vpe_table(u32 vpe_id) +{ + struct its_node *its; + + /* + * Make sure the L2 tables are allocated on *all* v4 ITSs. We + * could try and only do it on ITSs corresponding to devices + * that have interrupts targeted at this VPE, but the + * complexity becomes crazy (and you have tons of memory + * anyway, right?). + */ + list_for_each_entry(its, &its_nodes, entry) { + struct its_baser *baser; + + if (!its->is_v4) + continue; + + baser = its_get_baser(its, GITS_BASER_TYPE_VCPU); + if (!baser) + return false; + + if (!its_alloc_table_entry(its, baser, vpe_id)) + return false; + } + + return true; +} + +static struct its_device *its_create_device(struct its_node *its, u32 dev_id, + int nvecs, bool alloc_lpis) +{ + struct its_device *dev; + unsigned long *lpi_map = NULL; + unsigned long flags; + u16 *col_map = NULL; + void *itt; + int lpi_base; + int nr_lpis; + int nr_ites; + int sz; + + if (!its_alloc_device_table(its, dev_id)) + return NULL; + + if (WARN_ON(!is_power_of_2(nvecs))) + nvecs = roundup_pow_of_two(nvecs); + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + /* + * Even if the device wants a single LPI, the ITT must be + * sized as a power of two (and you need at least one bit...). + */ + nr_ites = max(2, nvecs); + sz = nr_ites * its->ite_size; + sz = max(sz, ITS_ITT_ALIGN) + ITS_ITT_ALIGN - 1; + itt = kzalloc_node(sz, GFP_KERNEL, its->numa_node); + if (alloc_lpis) { + lpi_map = its_lpi_alloc(nvecs, &lpi_base, &nr_lpis); + if (lpi_map) + col_map = kcalloc(nr_lpis, sizeof(*col_map), + GFP_KERNEL); + } else { + col_map = kcalloc(nr_ites, sizeof(*col_map), GFP_KERNEL); + nr_lpis = 0; + lpi_base = 0; + } + + if (!dev || !itt || !col_map || (!lpi_map && alloc_lpis)) { + kfree(dev); + kfree(itt); + kfree(lpi_map); + kfree(col_map); + return NULL; + } + + gic_flush_dcache_to_poc(itt, sz); + + dev->its = its; + dev->itt = itt; + dev->nr_ites = nr_ites; + dev->event_map.lpi_map = lpi_map; + dev->event_map.col_map = col_map; + dev->event_map.lpi_base = lpi_base; + dev->event_map.nr_lpis = nr_lpis; + raw_spin_lock_init(&dev->event_map.vlpi_lock); + dev->device_id = dev_id; + INIT_LIST_HEAD(&dev->entry); + + raw_spin_lock_irqsave(&its->lock, flags); + list_add(&dev->entry, &its->its_device_list); + raw_spin_unlock_irqrestore(&its->lock, flags); + + /* Map device to its ITT */ + its_send_mapd(dev, 1); + + return dev; +} + +static void its_free_device(struct its_device *its_dev) +{ + unsigned long flags; + + raw_spin_lock_irqsave(&its_dev->its->lock, flags); + list_del(&its_dev->entry); + raw_spin_unlock_irqrestore(&its_dev->its->lock, flags); + kfree(its_dev->itt); + kfree(its_dev); +} + +static int its_alloc_device_irq(struct its_device *dev, int nvecs, irq_hw_number_t *hwirq) +{ + int idx; + + idx = bitmap_find_free_region(dev->event_map.lpi_map, + dev->event_map.nr_lpis, + get_count_order(nvecs)); + if (idx < 0) + return -ENOSPC; + + *hwirq = dev->event_map.lpi_base + idx; + set_bit(idx, dev->event_map.lpi_map); + + return 0; +} + +static int its_msi_prepare(struct irq_domain *domain, struct device *dev, + int nvec, msi_alloc_info_t *info) +{ + struct its_node *its; + struct its_device *its_dev; + struct msi_domain_info *msi_info; + u32 dev_id; + int err = 0; + + /* + * We ignore "dev" entierely, and rely on the dev_id that has + * been passed via the scratchpad. This limits this domain's + * usefulness to upper layers that definitely know that they + * are built on top of the ITS. + */ + dev_id = info->scratchpad[0].ul; + + msi_info = msi_get_domain_info(domain); + its = msi_info->data; + + if (!gic_rdists->has_direct_lpi && + vpe_proxy.dev && + vpe_proxy.dev->its == its && + dev_id == vpe_proxy.dev->device_id) { + /* Bad luck. Get yourself a better implementation */ + WARN_ONCE(1, "DevId %x clashes with GICv4 VPE proxy device\n", + dev_id); + return -EINVAL; + } + + mutex_lock(&its->dev_alloc_lock); + its_dev = its_find_device(its, dev_id); + if (its_dev) { + /* + * We already have seen this ID, probably through + * another alias (PCI bridge of some sort). No need to + * create the device. + */ + its_dev->shared = true; + pr_debug("Reusing ITT for devID %x\n", dev_id); + goto out; + } + + its_dev = its_create_device(its, dev_id, nvec, true); + if (!its_dev) { + err = -ENOMEM; + goto out; + } + + pr_debug("ITT %d entries, %d bits\n", nvec, ilog2(nvec)); +out: + mutex_unlock(&its->dev_alloc_lock); + info->scratchpad[0].ptr = its_dev; + return err; +} + +static struct msi_domain_ops its_msi_domain_ops = { + .msi_prepare = its_msi_prepare, +}; + +static int its_irq_gic_domain_alloc(struct irq_domain *domain, + unsigned int virq, + irq_hw_number_t hwirq) +{ + struct irq_fwspec fwspec; + + if (irq_domain_get_of_node(domain->parent)) { + fwspec.fwnode = domain->parent->fwnode; + fwspec.param_count = 3; + fwspec.param[0] = GIC_IRQ_TYPE_LPI; + fwspec.param[1] = hwirq; + fwspec.param[2] = IRQ_TYPE_EDGE_RISING; + } else if (is_fwnode_irqchip(domain->parent->fwnode)) { + fwspec.fwnode = domain->parent->fwnode; + fwspec.param_count = 2; + fwspec.param[0] = hwirq; + fwspec.param[1] = IRQ_TYPE_EDGE_RISING; + } else { + return -EINVAL; + } + + return irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec); +} + +static int its_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *args) +{ + msi_alloc_info_t *info = args; + struct its_device *its_dev = info->scratchpad[0].ptr; + struct irq_data *irqd; + irq_hw_number_t hwirq; + int err; + int i; + + err = its_alloc_device_irq(its_dev, nr_irqs, &hwirq); + if (err) + return err; + + for (i = 0; i < nr_irqs; i++) { + err = its_irq_gic_domain_alloc(domain, virq + i, hwirq + i); + if (err) + return err; + + irq_domain_set_hwirq_and_chip(domain, virq + i, + hwirq + i, &its_irq_chip, its_dev); + irqd = irq_get_irq_data(virq + i); + irqd_set_single_target(irqd); + irqd_set_affinity_on_activate(irqd); + pr_debug("ID:%d pID:%d vID:%d\n", + (int)(hwirq + i - its_dev->event_map.lpi_base), + (int)(hwirq + i), virq + i); + } + + return 0; +} +static int its_cpumask_first(struct its_device *its_dev, + const struct cpumask *cpu_mask) +{ + unsigned int skt, skt_id, i; + phys_addr_t its_phys_base; + unsigned int cpu, cpus = 0; + unsigned int skt_cpu_cnt[MAX_MARS3_SKT_COUNT] = {0}; + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SKT_COUNT)) + skt_cpu_cnt[skt]++; + else if (0xff != skt) + pr_err("socket address: %d is out of range.", skt); + } + + its_phys_base = its_dev->its->phys_base; + skt_id = (its_phys_base >> 41) & 0x7; + + if (0 != skt_id) { + for (i = 0; i < skt_id; i++) + cpus += skt_cpu_cnt[i]; + } + + cpu = cpumask_first(cpu_mask); + if ((cpu > cpus) && (cpu < (cpus + skt_cpu_cnt[skt_id]))) + cpus = cpu; + + if (is_kdump_kernel()) { + skt = (cpu_logical_map(cpu) >> 16) & 0xff; + if (skt_id == skt) { + return cpu; + } + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SKT_COUNT)) { + if (skt_id == skt) { + return i; + } + } else if (0xff != skt) { + pr_err("socket address: %d is out of range.", skt); + } + } + } + + return cpus; +} + +static int its_irq_domain_activate(struct irq_domain *domain, + struct irq_data *d, bool reserve) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + const struct cpumask *cpu_mask = cpu_online_mask; + int cpu; + + /* get the cpu_mask of local node */ + if (its_dev->its->numa_node >= 0) + cpu_mask = cpumask_of_node(its_dev->its->numa_node); + + /* Bind the LPI to the first possible CPU */ + cpu = its_cpumask_first(its_dev, cpu_mask); + + its_dev->event_map.col_map[event] = cpu; + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + + /* Map the GIC IRQ and event to the device */ + its_send_mapti(its_dev, d->hwirq, event); + return 0; +} + +static void its_irq_domain_deactivate(struct irq_domain *domain, + struct irq_data *d) +{ + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + u32 event = its_get_event_id(d); + + /* Stop the delivery of interrupts */ + its_send_discard(its_dev, event); +} + +static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) +{ + struct irq_data *d = irq_domain_get_irq_data(domain, virq); + struct its_device *its_dev = irq_data_get_irq_chip_data(d); + struct its_node *its = its_dev->its; + int i; + + bitmap_release_region(its_dev->event_map.lpi_map, + its_get_event_id(irq_domain_get_irq_data(domain, virq)), + get_count_order(nr_irqs)); + + for (i = 0; i < nr_irqs; i++) { + struct irq_data *data = irq_domain_get_irq_data(domain, + virq + i); + /* Nuke the entry in the domain */ + irq_domain_reset_irq_data(data); + } + + mutex_lock(&its->dev_alloc_lock); + + /* + * If all interrupts have been freed, start mopping the + * floor. This is conditionned on the device not being shared. + */ + if (!its_dev->shared && + bitmap_empty(its_dev->event_map.lpi_map, + its_dev->event_map.nr_lpis)) { + its_lpi_free(its_dev->event_map.lpi_map, + its_dev->event_map.lpi_base, + its_dev->event_map.nr_lpis); + kfree(its_dev->event_map.col_map); + + /* Unmap device/itt */ + its_send_mapd(its_dev, 0); + its_free_device(its_dev); + } + + mutex_unlock(&its->dev_alloc_lock); + + irq_domain_free_irqs_parent(domain, virq, nr_irqs); +} + +static const struct irq_domain_ops its_domain_ops = { + .alloc = its_irq_domain_alloc, + .free = its_irq_domain_free, + .activate = its_irq_domain_activate, + .deactivate = its_irq_domain_deactivate, +}; + +/* + * This is insane. + * + * If a GICv4 doesn't implement Direct LPIs (which is extremely + * likely), the only way to perform an invalidate is to use a fake + * device to issue an INV command, implying that the LPI has first + * been mapped to some event on that device. Since this is not exactly + * cheap, we try to keep that mapping around as long as possible, and + * only issue an UNMAP if we're short on available slots. + * + * Broken by design(tm). + */ +static void its_vpe_db_proxy_unmap_locked(struct its_vpe *vpe) +{ + /* Already unmapped? */ + if (vpe->vpe_proxy_event == -1) + return; + + its_send_discard(vpe_proxy.dev, vpe->vpe_proxy_event); + vpe_proxy.vpes[vpe->vpe_proxy_event] = NULL; + + /* + * We don't track empty slots at all, so let's move the + * next_victim pointer if we can quickly reuse that slot + * instead of nuking an existing entry. Not clear that this is + * always a win though, and this might just generate a ripple + * effect... Let's just hope VPEs don't migrate too often. + */ + if (vpe_proxy.vpes[vpe_proxy.next_victim]) + vpe_proxy.next_victim = vpe->vpe_proxy_event; + + vpe->vpe_proxy_event = -1; +} + +static void its_vpe_db_proxy_unmap(struct its_vpe *vpe) +{ + if (!gic_rdists->has_direct_lpi) { + unsigned long flags; + + raw_spin_lock_irqsave(&vpe_proxy.lock, flags); + its_vpe_db_proxy_unmap_locked(vpe); + raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); + } +} + +static void its_vpe_db_proxy_map_locked(struct its_vpe *vpe) +{ + /* Already mapped? */ + if (vpe->vpe_proxy_event != -1) + return; + + /* This slot was already allocated. Kick the other VPE out. */ + if (vpe_proxy.vpes[vpe_proxy.next_victim]) + its_vpe_db_proxy_unmap_locked(vpe_proxy.vpes[vpe_proxy.next_victim]); + + /* Map the new VPE instead */ + vpe_proxy.vpes[vpe_proxy.next_victim] = vpe; + vpe->vpe_proxy_event = vpe_proxy.next_victim; + vpe_proxy.next_victim = (vpe_proxy.next_victim + 1) % vpe_proxy.dev->nr_ites; + + vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = vpe->col_idx; + its_send_mapti(vpe_proxy.dev, vpe->vpe_db_lpi, vpe->vpe_proxy_event); +} + +static void its_vpe_db_proxy_move(struct its_vpe *vpe, int from, int to) +{ + unsigned long flags; + struct its_collection *target_col; + + if (gic_rdists->has_direct_lpi) { + void __iomem *rdbase; + + rdbase = per_cpu_ptr(gic_rdists->rdist, from)->rd_base; + gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); + while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) + cpu_relax(); + + return; + } + + raw_spin_lock_irqsave(&vpe_proxy.lock, flags); + + its_vpe_db_proxy_map_locked(vpe); + + target_col = &vpe_proxy.dev->its->collections[to]; + its_send_movi(vpe_proxy.dev, target_col, vpe->vpe_proxy_event); + vpe_proxy.dev->event_map.col_map[vpe->vpe_proxy_event] = to; + + raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); +} + +static int its_vpe_set_affinity(struct irq_data *d, + const struct cpumask *mask_val, + bool force) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + int cpu = cpumask_first(mask_val); + + /* + * Changing affinity is mega expensive, so let's be as lazy as + * we can and only do it if we really have to. Also, if mapped + * into the proxy device, we need to move the doorbell + * interrupt to its new location. + */ + if (vpe->col_idx != cpu) { + int from = vpe->col_idx; + + vpe->col_idx = cpu; + its_send_vmovp(vpe); + its_vpe_db_proxy_move(vpe, from, cpu); + } + + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + + return IRQ_SET_MASK_OK_DONE; +} + +static void its_vpe_schedule(struct its_vpe *vpe) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val; + + /* Schedule the VPE */ + val = virt_to_phys(page_address(vpe->its_vm->vprop_page)) & + GENMASK_ULL(51, 12); + val |= (LPI_NRBITS - 1) & GICR_VPROPBASER_IDBITS_MASK; + val |= GICR_VPROPBASER_RaWb; + val |= GICR_VPROPBASER_InnerShareable; + gits_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); + + val = virt_to_phys(page_address(vpe->vpt_page)) & + GENMASK_ULL(51, 16); + val |= GICR_VPENDBASER_RaWaWb; + val |= GICR_VPENDBASER_InnerShareable; + /* + * There is no good way of finding out if the pending table is + * empty as we can race against the doorbell interrupt very + * easily. So in the end, vpe->pending_last is only an + * indication that the vcpu has something pending, not one + * that the pending table is empty. A good implementation + * would be able to read its coarse map pretty quickly anyway, + * making this a tolerable issue. + */ + val |= GICR_VPENDBASER_PendingLast; + val |= vpe->idai ? GICR_VPENDBASER_IDAI : 0; + val |= GICR_VPENDBASER_Valid; + gits_write_vpendbaser(val, vlpi_base + GICR_VPENDBASER); +} + +static void its_vpe_deschedule(struct its_vpe *vpe) +{ + void __iomem *vlpi_base = gic_data_rdist_vlpi_base(); + u64 val; + + val = its_clear_vpend_valid(vlpi_base); + + if (unlikely(val & GICR_VPENDBASER_Dirty)) { + pr_err_ratelimited("ITS virtual pending table not cleaning\n"); + vpe->idai = false; + vpe->pending_last = true; + } else { + vpe->idai = !!(val & GICR_VPENDBASER_IDAI); + vpe->pending_last = !!(val & GICR_VPENDBASER_PendingLast); + } +} + +static void its_vpe_invall(struct its_vpe *vpe) +{ + struct its_node *its; + + list_for_each_entry(its, &its_nodes, entry) { + if (!its->is_v4) + continue; + + if (its_list_map && !vpe->its_vm->vlpi_count[its->list_nr]) + continue; + + /* + * Sending a VINVALL to a single ITS is enough, as all + * we need is to reach the redistributors. + */ + its_send_vinvall(its, vpe); + return; + } +} + +static int its_vpe_set_vcpu_affinity(struct irq_data *d, void *vcpu_info) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_cmd_info *info = vcpu_info; + + switch (info->cmd_type) { + case SCHEDULE_VPE: + its_vpe_schedule(vpe); + return 0; + + case DESCHEDULE_VPE: + its_vpe_deschedule(vpe); + return 0; + + case INVALL_VPE: + its_vpe_invall(vpe); + return 0; + + default: + return -EINVAL; + } +} + +static void its_vpe_send_cmd(struct its_vpe *vpe, + void (*cmd)(struct its_device *, u32)) +{ + unsigned long flags; + + raw_spin_lock_irqsave(&vpe_proxy.lock, flags); + + its_vpe_db_proxy_map_locked(vpe); + cmd(vpe_proxy.dev, vpe->vpe_proxy_event); + + raw_spin_unlock_irqrestore(&vpe_proxy.lock, flags); +} + +static void its_vpe_send_inv(struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + if (gic_rdists->has_direct_lpi) { + void __iomem *rdbase; + + rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; + gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_INVLPIR); + while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) + cpu_relax(); + } else { + its_vpe_send_cmd(vpe, its_send_inv); + } +} + +static void its_vpe_mask_irq(struct irq_data *d) +{ + /* + * We need to unmask the LPI, which is described by the parent + * irq_data. Instead of calling into the parent (which won't + * exactly do the right thing, let's simply use the + * parent_data pointer. Yes, I'm naughty. + */ + lpi_write_config(d->parent_data, LPI_PROP_ENABLED, 0); + its_vpe_send_inv(d); +} + +static void its_vpe_unmask_irq(struct irq_data *d) +{ + /* Same hack as above... */ + lpi_write_config(d->parent_data, 0, LPI_PROP_ENABLED); + its_vpe_send_inv(d); +} + +static int its_vpe_set_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, + bool state) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + + if (which != IRQCHIP_STATE_PENDING) + return -EINVAL; + + if (gic_rdists->has_direct_lpi) { + void __iomem *rdbase; + + rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base; + if (state) { + gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_SETLPIR); + } else { + gic_write_lpir(vpe->vpe_db_lpi, rdbase + GICR_CLRLPIR); + while (gic_read_lpir(rdbase + GICR_SYNCR) & 1) + cpu_relax(); + } + } else { + if (state) + its_vpe_send_cmd(vpe, its_send_int); + else + its_vpe_send_cmd(vpe, its_send_clear); + } + + return 0; +} + +static int its_vpe_retrigger(struct irq_data *d) +{ + return !its_vpe_set_irqchip_state(d, IRQCHIP_STATE_PENDING, true); +} + +static struct irq_chip its_vpe_irq_chip = { + .name = "GICv4-vpe", + .irq_mask = its_vpe_mask_irq, + .irq_unmask = its_vpe_unmask_irq, + .irq_eoi = irq_chip_eoi_parent, + .irq_set_affinity = its_vpe_set_affinity, + .irq_retrigger = its_vpe_retrigger, + .irq_set_irqchip_state = its_vpe_set_irqchip_state, + .irq_set_vcpu_affinity = its_vpe_set_vcpu_affinity, +}; + +static int its_vpe_id_alloc(void) +{ + return ida_simple_get(&its_vpeid_ida, 0, ITS_MAX_VPEID, GFP_KERNEL); +} + +static void its_vpe_id_free(u16 id) +{ + ida_simple_remove(&its_vpeid_ida, id); +} + +static int its_vpe_init(struct its_vpe *vpe) +{ + struct page *vpt_page; + int vpe_id; + + /* Allocate vpe_id */ + vpe_id = its_vpe_id_alloc(); + if (vpe_id < 0) + return vpe_id; + + /* Allocate VPT */ + vpt_page = its_allocate_pending_table(GFP_KERNEL); + if (!vpt_page) { + its_vpe_id_free(vpe_id); + return -ENOMEM; + } + + if (!its_alloc_vpe_table(vpe_id)) { + its_vpe_id_free(vpe_id); + its_free_pending_table(vpt_page); + return -ENOMEM; + } + + vpe->vpe_id = vpe_id; + vpe->vpt_page = vpt_page; + vpe->vpe_proxy_event = -1; + + return 0; +} + +static void its_vpe_teardown(struct its_vpe *vpe) +{ + its_vpe_db_proxy_unmap(vpe); + its_vpe_id_free(vpe->vpe_id); + its_free_pending_table(vpe->vpt_page); +} + +static void its_vpe_irq_domain_free(struct irq_domain *domain, + unsigned int virq, + unsigned int nr_irqs) +{ + struct its_vm *vm = domain->host_data; + int i; + + irq_domain_free_irqs_parent(domain, virq, nr_irqs); + + for (i = 0; i < nr_irqs; i++) { + struct irq_data *data = irq_domain_get_irq_data(domain, + virq + i); + struct its_vpe *vpe = irq_data_get_irq_chip_data(data); + + BUG_ON(vm != vpe->its_vm); + + clear_bit(data->hwirq, vm->db_bitmap); + its_vpe_teardown(vpe); + irq_domain_reset_irq_data(data); + } + + if (bitmap_empty(vm->db_bitmap, vm->nr_db_lpis)) { + its_lpi_free(vm->db_bitmap, vm->db_lpi_base, vm->nr_db_lpis); + its_free_prop_table(vm->vprop_page); + } +} + +static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *args) +{ + struct its_vm *vm = args; + unsigned long *bitmap; + struct page *vprop_page; + int base, nr_ids, i, err = 0; + + BUG_ON(!vm); + + bitmap = its_lpi_alloc(roundup_pow_of_two(nr_irqs), &base, &nr_ids); + if (!bitmap) + return -ENOMEM; + + if (nr_ids < nr_irqs) { + its_lpi_free(bitmap, base, nr_ids); + return -ENOMEM; + } + + vprop_page = its_allocate_prop_table(GFP_KERNEL); + if (!vprop_page) { + its_lpi_free(bitmap, base, nr_ids); + return -ENOMEM; + } + + vm->db_bitmap = bitmap; + vm->db_lpi_base = base; + vm->nr_db_lpis = nr_ids; + vm->vprop_page = vprop_page; + + for (i = 0; i < nr_irqs; i++) { + vm->vpes[i]->vpe_db_lpi = base + i; + err = its_vpe_init(vm->vpes[i]); + if (err) + break; + err = its_irq_gic_domain_alloc(domain, virq + i, + vm->vpes[i]->vpe_db_lpi); + if (err) + break; + irq_domain_set_hwirq_and_chip(domain, virq + i, i, + &its_vpe_irq_chip, vm->vpes[i]); + set_bit(i, bitmap); + } + + if (err) { + if (i > 0) + its_vpe_irq_domain_free(domain, virq, i - 1); + + its_lpi_free(bitmap, base, nr_ids); + its_free_prop_table(vprop_page); + } + + return err; +} + +static int its_vpe_irq_domain_activate(struct irq_domain *domain, + struct irq_data *d, bool reserve) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_node *its; + + /* If we use the list map, we issue VMAPP on demand... */ + if (its_list_map) + return 0; + + /* Map the VPE to the first possible CPU */ + vpe->col_idx = cpumask_first(cpu_online_mask); + + list_for_each_entry(its, &its_nodes, entry) { + if (!its->is_v4) + continue; + + its_send_vmapp(its, vpe, true); + its_send_vinvall(its, vpe); + } + + irq_data_update_effective_affinity(d, cpumask_of(vpe->col_idx)); + + return 0; +} + +static void its_vpe_irq_domain_deactivate(struct irq_domain *domain, + struct irq_data *d) +{ + struct its_vpe *vpe = irq_data_get_irq_chip_data(d); + struct its_node *its; + + /* + * If we use the list map, we unmap the VPE once no VLPIs are + * associated with the VM. + */ + if (its_list_map) + return; + + list_for_each_entry(its, &its_nodes, entry) { + if (!its->is_v4) + continue; + + its_send_vmapp(its, vpe, false); + } +} + +static const struct irq_domain_ops its_vpe_domain_ops = { + .alloc = its_vpe_irq_domain_alloc, + .free = its_vpe_irq_domain_free, + .activate = its_vpe_irq_domain_activate, + .deactivate = its_vpe_irq_domain_deactivate, +}; + +static int its_force_quiescent(void __iomem *base) +{ + u32 count = 1000000; /* 1s */ + u32 val; + + val = readl_relaxed(base + GITS_CTLR); + /* + * GIC architecture specification requires the ITS to be both + * disabled and quiescent for writes to GITS_BASER<n> or + * GITS_CBASER to not have UNPREDICTABLE results. + */ + if ((val & GITS_CTLR_QUIESCENT) && !(val & GITS_CTLR_ENABLE)) + return 0; + + /* Disable the generation of all interrupts to this ITS */ + val &= ~(GITS_CTLR_ENABLE | GITS_CTLR_ImDe); + writel_relaxed(val, base + GITS_CTLR); + + /* Poll GITS_CTLR and wait until ITS becomes quiescent */ + while (1) { + val = readl_relaxed(base + GITS_CTLR); + if (val & GITS_CTLR_QUIESCENT) + return 0; + + count--; + if (!count) + return -EBUSY; + + cpu_relax(); + udelay(1); + } +} + +static bool __maybe_unused its_enable_quirk_cavium_22375(void *data) +{ + struct its_node *its = data; + + /* erratum 22375: only alloc 8MB table size */ + its->device_ids = 0x14; /* 20 bits, 8MB */ + its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375; + + return true; +} + +static bool __maybe_unused its_enable_quirk_cavium_23144(void *data) +{ + struct its_node *its = data; + + its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_23144; + + return true; +} + +static bool __maybe_unused its_enable_quirk_qdf2400_e0065(void *data) +{ + struct its_node *its = data; + + /* On QDF2400, the size of the ITE is 16Bytes */ + its->ite_size = 16; + + return true; +} + +static u64 its_irq_get_msi_base_pre_its(struct its_device *its_dev) +{ + struct its_node *its = its_dev->its; + + /* + * The Socionext Synquacer SoC has a so-called 'pre-ITS', + * which maps 32-bit writes targeted at a separate window of + * size '4 << device_id_bits' onto writes to GITS_TRANSLATER + * with device ID taken from bits [device_id_bits + 1:2] of + * the window offset. + */ + return its->pre_its_base + (its_dev->device_id << 2); +} + +static bool __maybe_unused its_enable_quirk_socionext_synquacer(void *data) +{ + struct its_node *its = data; + u32 pre_its_window[2]; + u32 ids; + + if (!fwnode_property_read_u32_array(its->fwnode_handle, + "socionext,synquacer-pre-its", + pre_its_window, + ARRAY_SIZE(pre_its_window))) { + + its->pre_its_base = pre_its_window[0]; + its->get_msi_base = its_irq_get_msi_base_pre_its; + + ids = ilog2(pre_its_window[1]) - 2; + if (its->device_ids > ids) + its->device_ids = ids; + + /* the pre-ITS breaks isolation, so disable MSI remapping */ + its->msi_domain_flags &= ~IRQ_DOMAIN_FLAG_MSI_REMAP; + return true; + } + return false; +} + +static bool __maybe_unused its_enable_quirk_hip07_161600802(void *data) +{ + struct its_node *its = data; + + /* + * Hip07 insists on using the wrong address for the VLPI + * page. Trick it into doing the right thing... + */ + its->vlpi_redist_offset = SZ_128K; + return true; +} + +static const struct gic_quirk its_quirks[] = { +#ifdef CONFIG_CAVIUM_ERRATUM_22375 + { + .desc = "ITS: Cavium errata 22375, 24313", + .iidr = 0xa100034c, /* ThunderX pass 1.x */ + .mask = 0xffff0fff, + .init = its_enable_quirk_cavium_22375, + }, +#endif +#ifdef CONFIG_CAVIUM_ERRATUM_23144 + { + .desc = "ITS: Cavium erratum 23144", + .iidr = 0xa100034c, /* ThunderX pass 1.x */ + .mask = 0xffff0fff, + .init = its_enable_quirk_cavium_23144, + }, +#endif +#ifdef CONFIG_QCOM_QDF2400_ERRATUM_0065 + { + .desc = "ITS: QDF2400 erratum 0065", + .iidr = 0x00001070, /* QDF2400 ITS rev 1.x */ + .mask = 0xffffffff, + .init = its_enable_quirk_qdf2400_e0065, + }, +#endif +#ifdef CONFIG_SOCIONEXT_SYNQUACER_PREITS + { + /* + * The Socionext Synquacer SoC incorporates ARM's own GIC-500 + * implementation, but with a 'pre-ITS' added that requires + * special handling in software. + */ + .desc = "ITS: Socionext Synquacer pre-ITS", + .iidr = 0x0001143b, + .mask = 0xffffffff, + .init = its_enable_quirk_socionext_synquacer, + }, +#endif +#ifdef CONFIG_HISILICON_ERRATUM_161600802 + { + .desc = "ITS: Hip07 erratum 161600802", + .iidr = 0x00000004, + .mask = 0xffffffff, + .init = its_enable_quirk_hip07_161600802, + }, +#endif + { + } +}; + +static void its_enable_quirks(struct its_node *its) +{ + u32 iidr = readl_relaxed(its->base + GITS_IIDR); + + gic_enable_quirks(iidr, its_quirks, its); +} + +static int its_save_disable(void) +{ + struct its_node *its; + int err = 0; + + raw_spin_lock(&its_lock); + list_for_each_entry(its, &its_nodes, entry) { + void __iomem *base; + + base = its->base; + its->ctlr_save = readl_relaxed(base + GITS_CTLR); + err = its_force_quiescent(base); + if (err) { + pr_err("ITS@%pa: failed to quiesce: %d\n", + &its->phys_base, err); + writel_relaxed(its->ctlr_save, base + GITS_CTLR); + goto err; + } + + its->cbaser_save = gits_read_cbaser(base + GITS_CBASER); + } + +err: + if (err) { + list_for_each_entry_continue_reverse(its, &its_nodes, entry) { + void __iomem *base; + + base = its->base; + writel_relaxed(its->ctlr_save, base + GITS_CTLR); + } + } + raw_spin_unlock(&its_lock); + + return err; +} + +static void its_restore_enable(void) +{ + struct its_node *its; + int ret; + + raw_spin_lock(&its_lock); + list_for_each_entry(its, &its_nodes, entry) { + void __iomem *base; + int i; + + base = its->base; + + /* + * Make sure that the ITS is disabled. If it fails to quiesce, + * don't restore it since writing to CBASER or BASER<n> + * registers is undefined according to the GIC v3 ITS + * Specification. + * + * Firmware resuming with the ITS enabled is terminally broken. + */ + WARN_ON(readl_relaxed(base + GITS_CTLR) & GITS_CTLR_ENABLE); + ret = its_force_quiescent(base); + if (ret) { + pr_err("ITS@%pa: failed to quiesce on resume: %d\n", + &its->phys_base, ret); + continue; + } + + gits_write_cbaser(its->cbaser_save, base + GITS_CBASER); + + /* + * Writing CBASER resets CREADR to 0, so make CWRITER and + * cmd_write line up with it. + */ + its->cmd_write = its->cmd_base; + gits_write_cwriter(0, base + GITS_CWRITER); + + /* Restore GITS_BASER from the value cache. */ + for (i = 0; i < GITS_BASER_NR_REGS; i++) { + struct its_baser *baser = &its->tables[i]; + + if (!(baser->val & GITS_BASER_VALID)) + continue; + + its_write_baser(its, baser, baser->val); + } + writel_relaxed(its->ctlr_save, base + GITS_CTLR); + + /* + * Reinit the collection if it's stored in the ITS. This is + * indicated by the col_id being less than the HCC field. + * CID < HCC as specified in the GIC v3 Documentation. + */ + if (its->collections[smp_processor_id()].col_id < + GITS_TYPER_HCC(gic_read_typer(base + GITS_TYPER))) + its_cpu_init_collection(its); + } + raw_spin_unlock(&its_lock); +} + +static struct syscore_ops its_syscore_ops = { + .suspend = its_save_disable, + .resume = its_restore_enable, +}; + +static int its_init_domain(struct fwnode_handle *handle, struct its_node *its) +{ + struct irq_domain *inner_domain; + struct msi_domain_info *info; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + inner_domain = irq_domain_create_tree(handle, &its_domain_ops, its); + if (!inner_domain) { + kfree(info); + return -ENOMEM; + } + + inner_domain->parent = its_parent; + irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS); + inner_domain->flags |= its->msi_domain_flags; + info->ops = &its_msi_domain_ops; + info->data = its; + inner_domain->host_data = info; + + return 0; +} + +static int its_init_vpe_domain(void) +{ + struct its_node *its; + u32 devid; + int entries; + + if (gic_rdists->has_direct_lpi) { + pr_info("ITS: Using DirectLPI for VPE invalidation\n"); + return 0; + } + + /* Any ITS will do, even if not v4 */ + its = list_first_entry(&its_nodes, struct its_node, entry); + + entries = roundup_pow_of_two(nr_cpu_ids); + vpe_proxy.vpes = kcalloc(entries, sizeof(*vpe_proxy.vpes), + GFP_KERNEL); + if (!vpe_proxy.vpes) { + pr_err("ITS: Can't allocate GICv4 proxy device array\n"); + return -ENOMEM; + } + + /* Use the last possible DevID */ + devid = GENMASK(its->device_ids - 1, 0); + vpe_proxy.dev = its_create_device(its, devid, entries, false); + if (!vpe_proxy.dev) { + kfree(vpe_proxy.vpes); + pr_err("ITS: Can't allocate GICv4 proxy device\n"); + return -ENOMEM; + } + + BUG_ON(entries > vpe_proxy.dev->nr_ites); + + raw_spin_lock_init(&vpe_proxy.lock); + vpe_proxy.next_victim = 0; + pr_info("ITS: Allocated DevID %x as GICv4 proxy device (%d slots)\n", + devid, vpe_proxy.dev->nr_ites); + + return 0; +} + +static int __init its_compute_its_list_map(struct resource *res, + void __iomem *its_base) +{ + int its_number; + u32 ctlr; + + /* + * This is assumed to be done early enough that we're + * guaranteed to be single-threaded, hence no + * locking. Should this change, we should address + * this. + */ + its_number = find_first_zero_bit(&its_list_map, GICv4_ITS_LIST_MAX); + if (its_number >= GICv4_ITS_LIST_MAX) { + pr_err("ITS@%pa: No ITSList entry available!\n", + &res->start); + return -EINVAL; + } + + ctlr = readl_relaxed(its_base + GITS_CTLR); + ctlr &= ~GITS_CTLR_ITS_NUMBER; + ctlr |= its_number << GITS_CTLR_ITS_NUMBER_SHIFT; + writel_relaxed(ctlr, its_base + GITS_CTLR); + ctlr = readl_relaxed(its_base + GITS_CTLR); + if ((ctlr & GITS_CTLR_ITS_NUMBER) != (its_number << GITS_CTLR_ITS_NUMBER_SHIFT)) { + its_number = ctlr & GITS_CTLR_ITS_NUMBER; + its_number >>= GITS_CTLR_ITS_NUMBER_SHIFT; + } + + if (test_and_set_bit(its_number, &its_list_map)) { + pr_err("ITS@%pa: Duplicate ITSList entry %d\n", + &res->start, its_number); + return -EINVAL; + } + + return its_number; +} + +static int __init its_probe_one(struct resource *res, + struct fwnode_handle *handle, int numa_node) +{ + struct its_node *its; + void __iomem *its_base; + u32 val, ctlr; + u64 baser, tmp, typer; + int err; + + its_base = ioremap(res->start, resource_size(res)); + if (!its_base) { + pr_warn("ITS@%pa: Unable to map ITS registers\n", &res->start); + return -ENOMEM; + } + + val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK; + if (val != 0x30 && val != 0x40) { + pr_warn("ITS@%pa: No ITS detected, giving up\n", &res->start); + err = -ENODEV; + goto out_unmap; + } + + err = its_force_quiescent(its_base); + if (err) { + pr_warn("ITS@%pa: Failed to quiesce, giving up\n", &res->start); + goto out_unmap; + } + + pr_info("ITS %pR\n", res); + + its = kzalloc(sizeof(*its), GFP_KERNEL); + if (!its) { + err = -ENOMEM; + goto out_unmap; + } + + raw_spin_lock_init(&its->lock); + mutex_init(&its->dev_alloc_lock); + INIT_LIST_HEAD(&its->entry); + INIT_LIST_HEAD(&its->its_device_list); + typer = gic_read_typer(its_base + GITS_TYPER); + its->base = its_base; + its->phys_base = res->start; + its->ite_size = GITS_TYPER_ITT_ENTRY_SIZE(typer); + its->device_ids = GITS_TYPER_DEVBITS(typer); + its->is_v4 = !!(typer & GITS_TYPER_VLPIS); + if (its->is_v4) { + if (!(typer & GITS_TYPER_VMOVP)) { + err = its_compute_its_list_map(res, its_base); + if (err < 0) + goto out_free_its; + + its->list_nr = err; + + pr_info("ITS@%pa: Using ITS number %d\n", + &res->start, err); + } else { + pr_info("ITS@%pa: Single VMOVP capable\n", &res->start); + } + } + + its->numa_node = numa_node; + + its->cmd_base = (void *)page_address(alloc_pages_node(its->numa_node, + GFP_KERNEL | __GFP_ZERO, + get_order(ITS_CMD_QUEUE_SZ))); + if (!its->cmd_base) { + err = -ENOMEM; + goto out_free_its; + } + its->cmd_write = its->cmd_base; + its->fwnode_handle = handle; + its->get_msi_base = its_irq_get_msi_base; + its->msi_domain_flags = IRQ_DOMAIN_FLAG_MSI_REMAP; + + its_enable_quirks(its); + + err = its_alloc_tables(its); + if (err) + goto out_free_cmd; + + err = its_alloc_collections(its); + if (err) + goto out_free_tables; + + baser = (virt_to_phys(its->cmd_base) | + GITS_CBASER_RaWaWb | + GITS_CBASER_InnerShareable | + (ITS_CMD_QUEUE_SZ / SZ_4K - 1) | + GITS_CBASER_VALID); + + gits_write_cbaser(baser, its->base + GITS_CBASER); + tmp = gits_read_cbaser(its->base + GITS_CBASER); + + if ((tmp ^ baser) & GITS_CBASER_SHAREABILITY_MASK) { + if (!(tmp & GITS_CBASER_SHAREABILITY_MASK)) { + /* + * The HW reports non-shareable, we must + * remove the cacheability attributes as + * well. + */ + baser &= ~(GITS_CBASER_SHAREABILITY_MASK | + GITS_CBASER_CACHEABILITY_MASK); + baser |= GITS_CBASER_nC; + gits_write_cbaser(baser, its->base + GITS_CBASER); + } + pr_info("ITS: using cache flushing for cmd queue\n"); + its->flags |= ITS_FLAGS_CMDQ_NEEDS_FLUSHING; + } + + gits_write_cwriter(0, its->base + GITS_CWRITER); + ctlr = readl_relaxed(its->base + GITS_CTLR); + ctlr |= GITS_CTLR_ENABLE; + if (its->is_v4) + ctlr |= GITS_CTLR_ImDe; + writel_relaxed(ctlr, its->base + GITS_CTLR); + + err = its_init_domain(handle, its); + if (err) + goto out_free_tables; + + raw_spin_lock(&its_lock); + list_add(&its->entry, &its_nodes); + raw_spin_unlock(&its_lock); + + return 0; + +out_free_tables: + its_free_tables(its); +out_free_cmd: + free_pages((unsigned long)its->cmd_base, get_order(ITS_CMD_QUEUE_SZ)); +out_free_its: + kfree(its); +out_unmap: + iounmap(its_base); + pr_err("ITS@%pa: failed probing (%d)\n", &res->start, err); + return err; +} + +static bool gic_rdists_supports_plpis(void) +{ + return !!(gic_read_typer(gic_data_rdist_rd_base() + GICR_TYPER) & GICR_TYPER_PLPIS); +} + +static int redist_disable_lpis(void) +{ + void __iomem *rbase = gic_data_rdist_rd_base(); + u64 timeout = USEC_PER_SEC; + u64 val; + + if (!gic_rdists_supports_plpis()) { + pr_info("CPU%d: LPIs not supported\n", smp_processor_id()); + return -ENXIO; + } + + val = readl_relaxed(rbase + GICR_CTLR); + if (!(val & GICR_CTLR_ENABLE_LPIS)) + return 0; + + /* + * If coming via a CPU hotplug event, we don't need to disable + * LPIs before trying to re-enable them. They are already + * configured and all is well in the world. + * + * If running with preallocated tables, there is nothing to do. + */ + if (gic_data_rdist()->lpi_enabled || + (gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED)) + return 0; + + /* + * From that point on, we only try to do some damage control. + */ + pr_warn("GIC-2500: CPU%d: Booted with LPIs enabled, memory probably corrupted\n", + smp_processor_id()); + add_taint(TAINT_CRAP, LOCKDEP_STILL_OK); + + /* Disable LPIs */ + val &= ~GICR_CTLR_ENABLE_LPIS; + writel_relaxed(val, rbase + GICR_CTLR); + + /* Make sure any change to GICR_CTLR is observable by the GIC */ + dsb(sy); + + /* + * Software must observe RWP==0 after clearing GICR_CTLR.EnableLPIs + * from 1 to 0 before programming GICR_PEND{PROP}BASER registers. + * Error out if we time out waiting for RWP to clear. + */ + while (readl_relaxed(rbase + GICR_CTLR) & GICR_CTLR_RWP) { + if (!timeout) { + pr_err("CPU%d: Timeout while disabling LPIs\n", + smp_processor_id()); + return -ETIMEDOUT; + } + udelay(1); + timeout--; + } + + /* + * After it has been written to 1, it is IMPLEMENTATION + * DEFINED whether GICR_CTLR.EnableLPI becomes RES1 or can be + * cleared to 0. Error out if clearing the bit failed. + */ + if (readl_relaxed(rbase + GICR_CTLR) & GICR_CTLR_ENABLE_LPIS) { + pr_err("CPU%d: Failed to disable LPIs\n", smp_processor_id()); + return -EBUSY; + } + + return 0; +} + +int phytium_its_cpu_init(void) +{ + if (!list_empty(&its_nodes)) { + int ret; + + ret = redist_disable_lpis(); + if (ret) + return ret; + + its_cpu_init_lpis(); + its_cpu_init_collections(); + } + + return 0; +} + +static const struct of_device_id its_device_id[] = { + { .compatible = "arm,gic-phytium-2500-its", }, + {}, +}; + +static int __init its_of_probe(struct device_node *node) +{ + struct device_node *np; + struct resource res; + + for (np = of_find_matching_node(node, its_device_id); np; + np = of_find_matching_node(np, its_device_id)) { + if (!of_device_is_available(np)) + continue; + if (!of_property_read_bool(np, "msi-controller")) { + pr_warn("%pOF: no msi-controller property, ITS ignored\n", + np); + continue; + } + + if (of_address_to_resource(np, 0, &res)) { + pr_warn("%pOF: no regs?\n", np); + continue; + } + + its_probe_one(&res, &np->fwnode, of_node_to_nid(np)); + } + return 0; +} + +#ifdef CONFIG_ACPI + +#define ACPI_GICV3_ITS_MEM_SIZE (SZ_128K) + +#ifdef CONFIG_ACPI_NUMA +struct its_srat_map { + /* numa node id */ + u32 numa_node; + /* GIC ITS ID */ + u32 its_id; +}; + +static struct its_srat_map *its_srat_maps __initdata; +static int its_in_srat __initdata; + +static int __init acpi_get_its_numa_node(u32 its_id) +{ + int i; + + for (i = 0; i < its_in_srat; i++) { + if (its_id == its_srat_maps[i].its_id) + return its_srat_maps[i].numa_node; + } + return NUMA_NO_NODE; +} + +static int __init gic_acpi_match_srat_its(struct acpi_subtable_header *header, + const unsigned long end) +{ + return 0; +} + +static int __init gic_acpi_parse_srat_its(struct acpi_subtable_header *header, + const unsigned long end) +{ + int node; + struct acpi_srat_gic_its_affinity *its_affinity; + + its_affinity = (struct acpi_srat_gic_its_affinity *)header; + if (!its_affinity) + return -EINVAL; + + if (its_affinity->header.length < sizeof(*its_affinity)) { + pr_err("SRAT: Invalid header length %d in ITS affinity\n", + its_affinity->header.length); + return -EINVAL; + } + + node = acpi_map_pxm_to_node(its_affinity->proximity_domain); + + if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) { + pr_err("SRAT: Invalid NUMA node %d in ITS affinity\n", node); + return 0; + } + + its_srat_maps[its_in_srat].numa_node = node; + its_srat_maps[its_in_srat].its_id = its_affinity->its_id; + its_in_srat++; + pr_info("SRAT: PXM %d -> ITS %d -> Node %d\n", + its_affinity->proximity_domain, its_affinity->its_id, node); + + return 0; +} + +static void __init acpi_table_parse_srat_its(void) +{ + int count; + + count = acpi_table_parse_entries(ACPI_SIG_SRAT, + sizeof(struct acpi_table_srat), + ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, + gic_acpi_match_srat_its, 0); + if (count <= 0) + return; + + its_srat_maps = kmalloc_array(count, sizeof(struct its_srat_map), + GFP_KERNEL); + if (!its_srat_maps) { + pr_warn("SRAT: Failed to allocate memory for its_srat_maps!\n"); + return; + } + + acpi_table_parse_entries(ACPI_SIG_SRAT, + sizeof(struct acpi_table_srat), + ACPI_SRAT_TYPE_GIC_ITS_AFFINITY, + gic_acpi_parse_srat_its, 0); +} + +/* free the its_srat_maps after ITS probing */ +static void __init acpi_its_srat_maps_free(void) +{ + kfree(its_srat_maps); +} +#else +static void __init acpi_table_parse_srat_its(void) { } +static int __init acpi_get_its_numa_node(u32 its_id) { return NUMA_NO_NODE; } +static void __init acpi_its_srat_maps_free(void) { } +#endif + +static int __init gic_acpi_parse_madt_its(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_translator *its_entry; + struct fwnode_handle *dom_handle; + struct resource res; + int err; + + its_entry = (struct acpi_madt_generic_translator *)header; + memset(&res, 0, sizeof(res)); + res.start = its_entry->base_address; + res.end = its_entry->base_address + ACPI_GICV3_ITS_MEM_SIZE - 1; + res.flags = IORESOURCE_MEM; + + dom_handle = irq_domain_alloc_fwnode((void *)its_entry->base_address); + if (!dom_handle) { + pr_err("ITS@%pa: Unable to allocate GIC-Phytium-2500 ITS domain token\n", + &res.start); + return -ENOMEM; + } + + err = iort_register_domain_token(its_entry->translation_id, res.start, + dom_handle); + if (err) { + pr_err("ITS@%pa: Unable to register GIC-Phytium-2500 ITS domain token (ITS ID %d) to IORT\n", + &res.start, its_entry->translation_id); + goto dom_err; + } + + err = its_probe_one(&res, dom_handle, + acpi_get_its_numa_node(its_entry->translation_id)); + if (!err) + return 0; + + iort_deregister_domain_token(its_entry->translation_id); +dom_err: + irq_domain_free_fwnode(dom_handle); + return err; +} + +static void __init its_acpi_probe(void) +{ + acpi_table_parse_srat_its(); + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, + gic_acpi_parse_madt_its, 0); + acpi_its_srat_maps_free(); +} +#else +static void __init its_acpi_probe(void) { } +#endif + +int __init phytium_its_init(struct fwnode_handle *handle, struct rdists *rdists, + struct irq_domain *parent_domain) +{ + struct device_node *of_node; + struct its_node *its; + bool has_v4 = false; + int err; + + its_parent = parent_domain; + of_node = to_of_node(handle); + if (of_node) + its_of_probe(of_node); + else + its_acpi_probe(); + + if (list_empty(&its_nodes)) { + pr_warn("ITS: No ITS available, not enabling LPIs\n"); + return -ENXIO; + } + + gic_rdists = rdists; + + err = allocate_lpi_tables(); + if (err) + return err; + + list_for_each_entry(its, &its_nodes, entry) + has_v4 |= its->is_v4; + + if (has_v4 & rdists->has_vlpis) { + if (its_init_vpe_domain() || + its_init_v4(parent_domain, &its_vpe_domain_ops)) { + rdists->has_vlpis = false; + pr_err("ITS: Disabling GICv4 support\n"); + } + } + + register_syscore_ops(&its_syscore_ops); + + return 0; +} diff --git a/drivers/irqchip/irq-gic-phytium-2500.c b/drivers/irqchip/irq-gic-phytium-2500.c new file mode 100644 index 0000000000000..fc69057e53f68 --- /dev/null +++ b/drivers/irqchip/irq-gic-phytium-2500.c @@ -0,0 +1,2136 @@ +/* + * Copyright (C) 2020 Phytium Corporation. + * Author: Wang Yinfeng <wangyinfeng(a)phytium.com.cn> + * Chen Baozi <chenbaozi(a)phytium.com.cn> + * Mao hongbo <maohongbo(a)phytium.com.cn> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#define pr_fmt(fmt) "GIC-2500: " fmt + +#include <linux/acpi.h> +#include <linux/cpu.h> +#include <linux/cpu_pm.h> +#include <linux/crash_dump.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/percpu.h> +#include <linux/refcount.h> +#include <linux/slab.h> + +#include <linux/irqchip.h> +#include <linux/irqchip/arm-gic-common.h> +#include <linux/irqchip/arm-gic-phytium-2500.h> +#include <linux/irqchip/irq-partition-percpu.h> + +#include <asm/cputype.h> +#include <asm/exception.h> +#include <asm/smp_plat.h> +#include <asm/virt.h> + +#include "irq-gic-common.h" + +#define MAX_MARS3_SOC_COUNT 8 +#define MARS3_ADDR_SKTID_SHIFT 41 + +struct gic_dist_desc { + void __iomem *dist_base; + phys_addr_t phys_base; + unsigned long size; +}; + +#define GICD_INT_NMI_PRI (GICD_INT_DEF_PRI & ~0x80) + +struct redist_region { + void __iomem *redist_base; + phys_addr_t phys_base; + bool single_redist; +}; + +static struct gic_dist_desc mars3_gic_dists[MAX_MARS3_SOC_COUNT] __read_mostly; + +static unsigned int mars3_sockets_bitmap = 0x1; + +#define mars3_irq_to_skt(hwirq) (((hwirq) - 32) % 8) + +struct gic_chip_data { + struct fwnode_handle *fwnode; + void __iomem *dist_base; + struct redist_region *redist_regions; + struct rdists rdists; + struct irq_domain *domain; + u64 redist_stride; + u32 nr_redist_regions; + bool has_rss; + unsigned int irq_nr; + struct partition_desc *ppi_descs[16]; +}; + +static struct gic_chip_data gic_data __read_mostly; +static DEFINE_STATIC_KEY_TRUE(supports_deactivate_key); + +/* + * The behaviours of RPR and PMR registers differ depending on the value of + * SCR_EL3.FIQ, and the behaviour of non-secure priority registers of the + * distributor and redistributors depends on whether security is enabled in the + * GIC. + * + * When security is enabled, non-secure priority values from the (re)distributor + * are presented to the GIC CPUIF as follow: + * (GIC_(R)DIST_PRI[irq] >> 1) | 0x80; + * + * If SCR_EL3.FIQ == 1, the values writen to/read from PMR and RPR at non-secure + * EL1 are subject to a similar operation thus matching the priorities presented + * from the (re)distributor when security is enabled. + * + * see GICv3/GICv4 Architecture Specification (IHI0069D): + * - section 4.8.1 Non-secure accesses to register fields for Secure interrupt + * priorities. + * - Figure 4-7 Secure read of the priority field for a Non-secure Group 1 + * interrupt. + * + * For now, we only support pseudo-NMIs if we have non-secure view of + * priorities. + */ +static DEFINE_STATIC_KEY_FALSE(supports_pseudo_nmis); + + +/* ppi_nmi_refs[n] == number of cpus having ppi[n + 16] set as NMI */ +static refcount_t ppi_nmi_refs[16]; + +static struct gic_kvm_info gic_v3_kvm_info; +static DEFINE_PER_CPU(bool, has_rss1); + +#define MPIDR_RS(mpidr) (((mpidr) & 0xF0UL) >> 4) +#define gic_data_rdist() (this_cpu_ptr(gic_data.rdists.rdist)) +#define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) +#define gic_data_rdist_sgi_base() (gic_data_rdist_rd_base() + SZ_64K) + +/* Our default, arbitrary priority value. Linux only uses one anyway. */ +#define DEFAULT_PMR_VALUE 0xf0 + +static inline unsigned int gic_irq(struct irq_data *d) +{ + return d->hwirq; +} + +static inline int gic_irq_in_rdist(struct irq_data *d) +{ + return gic_irq(d) < 32; +} + +static inline void __iomem *gic_dist_base(struct irq_data *d) +{ + if (gic_irq_in_rdist(d)) /* SGI+PPI -> SGI_base for this CPU */ + return gic_data_rdist_sgi_base(); + + if (d->hwirq <= 1023) /* SPI -> dist_base */ + return gic_data.dist_base; + + return NULL; +} + +static void gic_do_wait_for_rwp(void __iomem *base) +{ + u32 count = 1000000; /* 1s! */ + + while (readl_relaxed(base + GICD_CTLR) & GICD_CTLR_RWP) { + count--; + if (!count) { + pr_err_ratelimited("RWP timeout, gone fishing\n"); + return; + } + cpu_relax(); + udelay(1); + }; +} + +/* Wait for completion of a distributor change */ +static void gic_dist_wait_for_rwp(void) +{ + gic_do_wait_for_rwp(gic_data.dist_base); +} + +/* Wait for completion of a redistributor change */ +static void gic_redist_wait_for_rwp(void) +{ + gic_do_wait_for_rwp(gic_data_rdist_rd_base()); +} + +#ifdef CONFIG_ARM64 + +static u64 __maybe_unused gic_read_iar(void) +{ + if (cpus_have_const_cap(ARM64_WORKAROUND_CAVIUM_23154)) + return gic_read_iar_cavium_thunderx(); + else + return gic_read_iar_common(); +} +#endif + +static void gic_enable_redist(bool enable) +{ + void __iomem *rbase; + u32 count = 1000000; /* 1s! */ + u32 val; + unsigned long mpidr; + int i; + + rbase = gic_data_rdist_rd_base(); + + val = readl_relaxed(rbase + GICR_WAKER); + if (enable) + /* Wake up this CPU redistributor */ + val &= ~GICR_WAKER_ProcessorSleep; + else + val |= GICR_WAKER_ProcessorSleep; + writel_relaxed(val, rbase + GICR_WAKER); + + if (!enable) { /* Check that GICR_WAKER is writeable */ + val = readl_relaxed(rbase + GICR_WAKER); + if (!(val & GICR_WAKER_ProcessorSleep)) + return; /* No PM support in this redistributor */ + } + + while (--count) { + val = readl_relaxed(rbase + GICR_WAKER); + if (enable ^ (bool)(val & GICR_WAKER_ChildrenAsleep)) + break; + cpu_relax(); + udelay(1); + }; + if (!count) + pr_err_ratelimited("redistributor failed to %s...\n", + enable ? "wakeup" : "sleep"); + + mpidr = (unsigned long)cpu_logical_map(smp_processor_id()); + + /* Either Aff0 or Aff1 is not zero */ + if (mpidr & 0xffff) + return; + + /* Skip 64 Redistributors */ + rbase = rbase + 64 * SZ_128K; + + for (i = 0; i < 4; i++) { + val = readl_relaxed(rbase + GICR_WAKER); + if (enable) + val &= ~GICR_WAKER_ProcessorSleep; + else + val |= GICR_WAKER_ProcessorSleep; + writel_relaxed(val, rbase + GICR_WAKER); + + if (!enable) { + val = readl_relaxed(rbase + GICR_WAKER); + if (!(val & GICR_WAKER_ProcessorSleep)) + return; + } + + count = 1000000; /* 1s! */ + while (--count) { + val = readl_relaxed(rbase + GICR_WAKER); + if (enable ^ (bool)(val & GICR_WAKER_ChildrenAsleep)) + break; + cpu_relax(); + udelay(1); + }; + + if (!count) + pr_err_ratelimited("CPU MPIDR 0x%lx: redistributor %d failed to %s...\n", + mpidr, 64 + i, enable ? "wakeup" : "sleep"); + + rbase = rbase + SZ_128K; + } +} + +/* + * Routines to disable, enable, EOI and route interrupts + */ +static int gic_peek_irq(struct irq_data *d, u32 offset) +{ + u32 mask = 1 << (gic_irq(d) % 32); + void __iomem *base; + unsigned int skt; + + if (gic_irq_in_rdist(d)) + base = gic_data_rdist_sgi_base(); + else { + skt = mars3_irq_to_skt(gic_irq(d)); + base = mars3_gic_dists[skt].dist_base; + } + + return !!(readl_relaxed(base + offset + (gic_irq(d) / 32) * 4) & mask); +} + +static void gic_poke_irq(struct irq_data *d, u32 offset) +{ + u32 mask = 1 << (gic_irq(d) % 32); + void __iomem *base; + unsigned long mpidr; + void __iomem *rbase; + int i; + unsigned int skt; + + if (gic_irq_in_rdist(d)) { + base = gic_data_rdist_sgi_base(); + writel_relaxed(mask, base + offset + (gic_irq(d) / 32) * 4); + gic_redist_wait_for_rwp(); + + mpidr = (unsigned long)cpu_logical_map(smp_processor_id()); + + if ((mpidr & 0xffff) == 0) { + rbase = base + 64*SZ_128K; + + for (i = 0; i < 4; i++) { + writel_relaxed(mask, rbase + offset + (gic_irq(d) / 32) * 4); + gic_do_wait_for_rwp(rbase - SZ_64K); + rbase = rbase + SZ_128K; + } + } + } else { + skt = mars3_irq_to_skt(gic_irq(d)); + base = mars3_gic_dists[skt].dist_base; + writel_relaxed(mask, base + offset + (gic_irq(d) / 32) * 4); + gic_do_wait_for_rwp(base); + } + +} + +static void gic_mask_irq(struct irq_data *d) +{ + gic_poke_irq(d, GICD_ICENABLER); +} + +static void gic_eoimode1_mask_irq(struct irq_data *d) +{ + gic_mask_irq(d); + /* + * When masking a forwarded interrupt, make sure it is + * deactivated as well. + * + * This ensures that an interrupt that is getting + * disabled/masked will not get "stuck", because there is + * noone to deactivate it (guest is being terminated). + */ + if (irqd_is_forwarded_to_vcpu(d)) + gic_poke_irq(d, GICD_ICACTIVER); +} + +static void gic_unmask_irq(struct irq_data *d) +{ + gic_poke_irq(d, GICD_ISENABLER); +} + +static inline bool gic_supports_nmi(void) +{ + return IS_ENABLED(CONFIG_ARM64_PSEUDO_NMI) && + static_branch_likely(&supports_pseudo_nmis); +} + + +static int gic_irq_set_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, bool val) +{ + u32 reg; + + if (d->hwirq >= gic_data.irq_nr) /* PPI/SPI only */ + return -EINVAL; + + switch (which) { + case IRQCHIP_STATE_PENDING: + reg = val ? GICD_ISPENDR : GICD_ICPENDR; + break; + + case IRQCHIP_STATE_ACTIVE: + reg = val ? GICD_ISACTIVER : GICD_ICACTIVER; + break; + + case IRQCHIP_STATE_MASKED: + reg = val ? GICD_ICENABLER : GICD_ISENABLER; + break; + + default: + return -EINVAL; + } + + gic_poke_irq(d, reg); + return 0; +} + +static int gic_irq_get_irqchip_state(struct irq_data *d, + enum irqchip_irq_state which, bool *val) +{ + if (d->hwirq >= gic_data.irq_nr) /* PPI/SPI only */ + return -EINVAL; + + switch (which) { + case IRQCHIP_STATE_PENDING: + *val = gic_peek_irq(d, GICD_ISPENDR); + break; + + case IRQCHIP_STATE_ACTIVE: + *val = gic_peek_irq(d, GICD_ISACTIVER); + break; + + case IRQCHIP_STATE_MASKED: + *val = !gic_peek_irq(d, GICD_ISENABLER); + break; + + default: + return -EINVAL; + } + + return 0; +} + +static void gic_irq_set_prio(struct irq_data *d, u8 prio) +{ + void __iomem *base = gic_dist_base(d); + + writeb_relaxed(prio, base + GICD_IPRIORITYR + gic_irq(d)); +} + +static int gic_irq_nmi_setup(struct irq_data *d) +{ + struct irq_desc *desc = irq_to_desc(d->irq); + + if (!gic_supports_nmi()) + return -EINVAL; + + if (gic_peek_irq(d, GICD_ISENABLER)) { + pr_err("Cannot set NMI property of enabled IRQ %u\n", d->irq); + return -EINVAL; + } + + /* + * A secondary irq_chip should be in charge of LPI request, + * it should not be possible to get there + */ + if (WARN_ON(gic_irq(d) >= 8192)) + return -EINVAL; + + /* desc lock should already be held */ + if (gic_irq(d) < 32) { + /* Setting up PPI as NMI, only switch handler for first NMI */ + if (!refcount_inc_not_zero(&ppi_nmi_refs[gic_irq(d) - 16])) { + refcount_set(&ppi_nmi_refs[gic_irq(d) - 16], 1); + desc->handle_irq = handle_percpu_devid_fasteoi_nmi; + } + } else { + desc->handle_irq = handle_fasteoi_nmi; + } + + gic_irq_set_prio(d, GICD_INT_NMI_PRI); + + return 0; +} + +static void gic_irq_nmi_teardown(struct irq_data *d) +{ + struct irq_desc *desc = irq_to_desc(d->irq); + + if (WARN_ON(!gic_supports_nmi())) + return; + + if (gic_peek_irq(d, GICD_ISENABLER)) { + pr_err("Cannot set NMI property of enabled IRQ %u\n", d->irq); + return; + } + + /* + * A secondary irq_chip should be in charge of LPI request, + * it should not be possible to get there + */ + if (WARN_ON(gic_irq(d) >= 8192)) + return; + + /* desc lock should already be held */ + if (gic_irq(d) < 32) { + /* Tearing down NMI, only switch handler for last NMI */ + if (refcount_dec_and_test(&ppi_nmi_refs[gic_irq(d) - 16])) + desc->handle_irq = handle_percpu_devid_irq; + } else { + desc->handle_irq = handle_fasteoi_irq; + } + + gic_irq_set_prio(d, GICD_INT_DEF_PRI); +} + +static void gic_eoi_irq(struct irq_data *d) +{ + gic_write_eoir(gic_irq(d)); +} + +static void gic_eoimode1_eoi_irq(struct irq_data *d) +{ + /* + * No need to deactivate an LPI, or an interrupt that + * is is getting forwarded to a vcpu. + */ + if (gic_irq(d) >= 8192 || irqd_is_forwarded_to_vcpu(d)) + return; + gic_write_dir(gic_irq(d)); +} + +static int gic_set_type(struct irq_data *d, unsigned int type) +{ + unsigned int irq = gic_irq(d); + unsigned long mpidr; + int i; + void __iomem *base; + void __iomem *rbase; + unsigned int skt; + int ret; + + /* Interrupt configuration for SGIs can't be changed */ + if (irq < 16) + return -EINVAL; + + /* SPIs have restrictions on the supported types */ + if (irq >= 32 && type != IRQ_TYPE_LEVEL_HIGH && + type != IRQ_TYPE_EDGE_RISING) + return -EINVAL; + + if (gic_irq_in_rdist(d)) { + base = gic_data_rdist_sgi_base(); + ret = gic_configure_irq(irq, type, base, gic_redist_wait_for_rwp); + + mpidr = (unsigned long)cpu_logical_map(smp_processor_id()); + + if ((mpidr & 0xffff) == 0) { + rbase = base + 64*SZ_128K; + + for (i = 0; i < 4; i++) { + ret = gic_configure_irq(irq, type, rbase, NULL); + gic_do_wait_for_rwp(rbase - SZ_64K); + rbase = rbase + SZ_128K; + } + } + } else { + skt = mars3_irq_to_skt(gic_irq(d)); + base = mars3_gic_dists[skt].dist_base; + ret = gic_configure_irq(irq, type, base, NULL); + gic_do_wait_for_rwp(base); + } + + return ret; +} + +static int gic_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu) +{ + if (vcpu) + irqd_set_forwarded_to_vcpu(d); + else + irqd_clr_forwarded_to_vcpu(d); + return 0; +} + +static u64 gic_mpidr_to_affinity(unsigned long mpidr) +{ + u64 aff; + + aff = ((u64)MPIDR_AFFINITY_LEVEL(mpidr, 3) << 32 | + MPIDR_AFFINITY_LEVEL(mpidr, 2) << 16 | + MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 | + MPIDR_AFFINITY_LEVEL(mpidr, 0)); + + return aff; +} + +static void gic_deactivate_unhandled(u32 irqnr) +{ + if (static_branch_likely(&supports_deactivate_key)) { + if (irqnr < 8192) + gic_write_dir(irqnr); + } else { + gic_write_eoir(irqnr); + } +} + +static inline void gic_handle_nmi(u32 irqnr, struct pt_regs *regs) +{ + bool irqs_enabled = interrupts_enabled(regs); + int err; + + if (unlikely(irqnr < 16)) { + gic_write_eoir(irqnr); + if (static_branch_likely(&supports_deactivate_key)) + gic_write_dir(irqnr); +#ifdef CONFIG_SMP + handle_IPI(irqnr, regs); +#endif + return; + } + + if (irqs_enabled) + nmi_enter(); + + if (static_branch_likely(&supports_deactivate_key)) + gic_write_eoir(irqnr); + /* + * Leave the PSR.I bit set to prevent other NMIs to be + * received while handling this one. + * PSR.I will be restored when we ERET to the + * interrupted context. + */ + err = handle_domain_nmi(gic_data.domain, irqnr, regs); + if (err) + gic_deactivate_unhandled(irqnr); + + if (irqs_enabled) + nmi_exit(); +} + +static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs) +{ + u32 irqnr; + + irqnr = gic_read_iar(); + + /* Check for special IDs first */ + if ((irqnr >= 1020 && irqnr <= 1023)) + return; + + if (gic_supports_nmi() && + unlikely(gic_read_rpr() == GICD_INT_NMI_PRI)) { + gic_handle_nmi(irqnr, regs); + return; + } + + if (gic_prio_masking_enabled()) { + gic_pmr_mask_irqs(); + gic_arch_enable_irqs(); + } + + if (likely(irqnr > 15 && irqnr < 1020) || irqnr >= 8192) { + int err; + + if (static_branch_likely(&supports_deactivate_key)) + gic_write_eoir(irqnr); + else + isb(); + + err = handle_domain_irq(gic_data.domain, irqnr, regs); + if (err) { + WARN_ONCE(true, "Unexpected interrupt received!\n"); + gic_deactivate_unhandled(irqnr); + } + return; + } + if (irqnr < 16) { + gic_write_eoir(irqnr); + if (static_branch_likely(&supports_deactivate_key)) + gic_write_dir(irqnr); +#ifdef CONFIG_SMP + /* + * Unlike GICv2, we don't need an smp_rmb() here. + * The control dependency from gic_read_iar to + * the ISB in gic_write_eoir is enough to ensure + * that any shared data read by handle_IPI will + * be read after the ACK. + */ + handle_IPI(irqnr, regs); +#else + WARN_ONCE(true, "Unexpected SGI received!\n"); +#endif + } +} + +static u32 gic_get_pribits(void) +{ + u32 pribits; + + pribits = gic_read_ctlr(); + pribits &= ICC_CTLR_EL1_PRI_BITS_MASK; + pribits >>= ICC_CTLR_EL1_PRI_BITS_SHIFT; + pribits++; + + return pribits; +} + +static bool gic_has_group0(void) +{ + u32 val; + u32 old_pmr; + + old_pmr = gic_read_pmr(); + + /* + * Let's find out if Group0 is under control of EL3 or not by + * setting the highest possible, non-zero priority in PMR. + * + * If SCR_EL3.FIQ is set, the priority gets shifted down in + * order for the CPU interface to set bit 7, and keep the + * actual priority in the non-secure range. In the process, it + * looses the least significant bit and the actual priority + * becomes 0x80. Reading it back returns 0, indicating that + * we're don't have access to Group0. + */ + gic_write_pmr(BIT(8 - gic_get_pribits())); + val = gic_read_pmr(); + + gic_write_pmr(old_pmr); + + return val != 0; +} + +static void __init gic_dist_init(void) +{ + unsigned int i; + u64 affinity; + void __iomem *base; + unsigned int skt; + + for (skt = 0; skt < MAX_MARS3_SOC_COUNT; skt++) { + if ((((unsigned int)1 << skt) & mars3_sockets_bitmap) == 0) + continue; + + base = mars3_gic_dists[skt].dist_base; + + /* Disable the distributor */ + writel_relaxed(0, base + GICD_CTLR); + gic_do_wait_for_rwp(base); + + /* + * Configure SPIs as non-secure Group-1. This will only matter + * if the GIC only has a single security state. This will not + * do the right thing if the kernel is running in secure mode, + * but that's not the intended use case anyway. + */ + for (i = 32; i < gic_data.irq_nr; i += 32) + writel_relaxed(~0, base + GICD_IGROUPR + i / 8); + + gic_dist_config(base, gic_data.irq_nr, NULL); + gic_do_wait_for_rwp(base); + + /* Enable distributor with ARE, Group1 */ + writel_relaxed(GICD_CTLR_ARE_NS | GICD_CTLR_ENABLE_G1A | GICD_CTLR_ENABLE_G1, + base + GICD_CTLR); + + /* + * Set all global interrupts to the boot CPU only. ARE must be + * enabled. + */ + affinity = gic_mpidr_to_affinity(cpu_logical_map(smp_processor_id())); + for (i = 32; i < gic_data.irq_nr; i++) + gic_write_irouter(affinity, base + GICD_IROUTER + i * 8); + } +} + +static int gic_iterate_rdists(int (*fn)(struct redist_region *, void __iomem *)) +{ + int ret = -ENODEV; + int i; + + for (i = 0; i < gic_data.nr_redist_regions; i++) { + void __iomem *ptr = gic_data.redist_regions[i].redist_base; + u64 typer; + u32 reg; + + reg = readl_relaxed(ptr + GICR_PIDR2) & GIC_PIDR2_ARCH_MASK; + if (reg != GIC_PIDR2_ARCH_GICv3 && + reg != GIC_PIDR2_ARCH_GICv4) { /* We're in trouble... */ + pr_warn("No redistributor present @%p\n", ptr); + break; + } + + do { + typer = gic_read_typer(ptr + GICR_TYPER); + ret = fn(gic_data.redist_regions + i, ptr); + if (!ret) + return 0; + + if (gic_data.redist_regions[i].single_redist) + break; + + if (gic_data.redist_stride) { + ptr += gic_data.redist_stride; + } else { + ptr += SZ_64K * 2; /* Skip RD_base + SGI_base */ + if (typer & GICR_TYPER_VLPIS) + ptr += SZ_64K * 2; /* Skip VLPI_base + reserved page */ + } + } while (!(typer & GICR_TYPER_LAST)); + } + + return ret ? -ENODEV : 0; +} + +static int __gic_populate_rdist(struct redist_region *region, void __iomem *ptr) +{ + unsigned long mpidr = cpu_logical_map(smp_processor_id()); + u64 typer; + u32 aff, aff2_skt, rdist_skt; + + /* + * Convert affinity to a 32bit value that can be matched to + * GICR_TYPER bits [63:32]. + */ + aff = (MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 | + MPIDR_AFFINITY_LEVEL(mpidr, 0)); + + aff2_skt = MPIDR_AFFINITY_LEVEL(mpidr, 2) & 0x7; + rdist_skt = (((u64)region->phys_base >> MARS3_ADDR_SKTID_SHIFT) & 0x7); + + if (aff2_skt != rdist_skt) + return 1; + + typer = gic_read_typer(ptr + GICR_TYPER); + if ((typer >> 32) == aff) { + u64 offset = ptr - region->redist_base; + gic_data_rdist_rd_base() = ptr; + gic_data_rdist()->phys_base = region->phys_base + offset; + + pr_info("CPU%d: found redistributor %lx region %d:%pa\n", + smp_processor_id(), mpidr, + (int)(region - gic_data.redist_regions), + &gic_data_rdist()->phys_base); + return 0; + } + + /* Try next one */ + return 1; +} + +static int gic_populate_rdist(void) +{ + if (gic_iterate_rdists(__gic_populate_rdist) == 0) + return 0; + + /* We couldn't even deal with ourselves... */ + WARN(true, "CPU%d: mpidr %lx has no re-distributor!\n", + smp_processor_id(), + (unsigned long)cpu_logical_map(smp_processor_id())); + return -ENODEV; +} + +static int __gic_update_vlpi_properties(struct redist_region *region, + void __iomem *ptr) +{ + u64 typer = gic_read_typer(ptr + GICR_TYPER); + gic_data.rdists.has_vlpis &= !!(typer & GICR_TYPER_VLPIS); + gic_data.rdists.has_direct_lpi &= !!(typer & GICR_TYPER_DirectLPIS); + + return 1; +} + +static void gic_update_vlpi_properties(void) +{ + gic_iterate_rdists(__gic_update_vlpi_properties); + pr_info("%sVLPI support, %sdirect LPI support\n", + !gic_data.rdists.has_vlpis ? "no " : "", + !gic_data.rdists.has_direct_lpi ? "no " : ""); +} + +/* Check whether it's single security state view */ +static inline bool gic_dist_security_disabled(void) +{ + return readl_relaxed(gic_data.dist_base + GICD_CTLR) & GICD_CTLR_DS; +} + +static void gic_cpu_sys_reg_init(void) +{ + int i, cpu = smp_processor_id(); + u64 mpidr = cpu_logical_map(cpu); + u64 need_rss = MPIDR_RS(mpidr); + bool group0; + u32 pribits; + + /* + * Need to check that the SRE bit has actually been set. If + * not, it means that SRE is disabled at EL2. We're going to + * die painfully, and there is nothing we can do about it. + * + * Kindly inform the luser. + */ + if (!gic_enable_sre()) + pr_err("GIC: unable to set SRE (disabled at EL2), panic ahead\n"); + + pribits = gic_get_pribits(); + + group0 = gic_has_group0(); + + /* Set priority mask register */ + if (!gic_prio_masking_enabled()) { + write_gicreg(DEFAULT_PMR_VALUE, ICC_PMR_EL1); + } else { + /* + * Mismatch configuration with boot CPU, the system is likely + * to die as interrupt masking will not work properly on all + * CPUs + */ + WARN_ON(gic_supports_nmi() && group0 && + !gic_dist_security_disabled()); + } + + /* + * Some firmwares hand over to the kernel with the BPR changed from + * its reset value (and with a value large enough to prevent + * any pre-emptive interrupts from working at all). Writing a zero + * to BPR restores is reset value. + */ + gic_write_bpr1(0); + + if (static_branch_likely(&supports_deactivate_key)) { + /* EOI drops priority only (mode 1) */ + gic_write_ctlr(ICC_CTLR_EL1_EOImode_drop); + } else { + /* EOI deactivates interrupt too (mode 0) */ + gic_write_ctlr(ICC_CTLR_EL1_EOImode_drop_dir); + } + + /* Always whack Group0 before Group1 */ + if (group0) { + switch (pribits) { + case 8: + case 7: + write_gicreg(0, ICC_AP0R3_EL1); + write_gicreg(0, ICC_AP0R2_EL1); + case 6: + write_gicreg(0, ICC_AP0R1_EL1); + case 5: + case 4: + write_gicreg(0, ICC_AP0R0_EL1); + } + + isb(); + } + + switch (pribits) { + case 8: + case 7: + write_gicreg(0, ICC_AP1R3_EL1); + write_gicreg(0, ICC_AP1R2_EL1); + case 6: + write_gicreg(0, ICC_AP1R1_EL1); + case 5: + case 4: + write_gicreg(0, ICC_AP1R0_EL1); + } + + isb(); + + /* ... and let's hit the road... */ + gic_write_grpen1(1); + + /* Keep the RSS capability status in per_cpu variable */ + per_cpu(has_rss1, cpu) = !!(gic_read_ctlr() & ICC_CTLR_EL1_RSS); + + /* Check all the CPUs have capable of sending SGIs to other CPUs */ + for_each_online_cpu(i) { + bool have_rss = per_cpu(has_rss1, i) && per_cpu(has_rss1, cpu); + + need_rss |= MPIDR_RS(cpu_logical_map(i)); + if (need_rss && (!have_rss)) + pr_crit("CPU%d (%lx) can't SGI CPU%d (%lx), no RSS\n", + cpu, (unsigned long)mpidr, + i, (unsigned long)cpu_logical_map(i)); + } + + /** + * GIC spec says, when ICC_CTLR_EL1.RSS==1 and GICD_TYPER.RSS==0, + * writing ICC_ASGI1R_EL1 register with RS != 0 is a CONSTRAINED + * UNPREDICTABLE choice of : + * - The write is ignored. + * - The RS field is treated as 0. + */ + if (need_rss && (!gic_data.has_rss)) + pr_crit_once("RSS is required but GICD doesn't support it\n"); +} + +static bool gicv3_nolpi; + +static int __init gicv3_nolpi_cfg(char *buf) +{ + return strtobool(buf, &gicv3_nolpi); +} +early_param("irqchip.gicv3_nolpi", gicv3_nolpi_cfg); + +static int gic_dist_supports_lpis(void) +{ + return (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) && + !!(readl_relaxed(gic_data.dist_base + GICD_TYPER) & GICD_TYPER_LPIS) && + !gicv3_nolpi); +} + +static void gic_cpu_init(void) +{ + void __iomem *rbase; + unsigned long mpidr; + int i; + + /* Register ourselves with the rest of the world */ + if (gic_populate_rdist()) + return; + + gic_enable_redist(true); + + rbase = gic_data_rdist_sgi_base(); + + /* Configure SGIs/PPIs as non-secure Group-1 */ + writel_relaxed(~0, rbase + GICR_IGROUPR0); + + gic_cpu_config(rbase, gic_redist_wait_for_rwp); + + mpidr = (unsigned long)cpu_logical_map(smp_processor_id()); + + if ((mpidr & 0xFFFF) == 0) { + rbase = rbase + 64*SZ_128K; + + for (i = 0; i < 4; i++) { + /* Configure SGIs/PPIs as non-secure Group-1 */ + writel_relaxed(~0, rbase + GICR_IGROUPR0); + + gic_cpu_config(rbase, NULL); + gic_do_wait_for_rwp(rbase - SZ_64K); + + rbase = rbase + SZ_128K; + } + } + + /* initialise system registers */ + gic_cpu_sys_reg_init(); +} + +#ifdef CONFIG_SMP + +#define MPIDR_TO_SGI_RS(mpidr) (MPIDR_RS(mpidr) << ICC_SGI1R_RS_SHIFT) +#define MPIDR_TO_SGI_CLUSTER_ID(mpidr) ((mpidr) & ~0xFUL) + +static int gic_starting_cpu(unsigned int cpu) +{ + gic_cpu_init(); + + if (gic_dist_supports_lpis()) + phytium_its_cpu_init(); + + return 0; +} + +static u16 gic_compute_target_list(int *base_cpu, const struct cpumask *mask, + unsigned long cluster_id) +{ + int next_cpu, cpu = *base_cpu; + unsigned long mpidr = cpu_logical_map(cpu); + u16 tlist = 0; + + while (cpu < nr_cpu_ids) { + tlist |= 1 << (mpidr & 0xf); + + next_cpu = cpumask_next(cpu, mask); + if (next_cpu >= nr_cpu_ids) + goto out; + cpu = next_cpu; + + mpidr = cpu_logical_map(cpu); + + if (cluster_id != MPIDR_TO_SGI_CLUSTER_ID(mpidr)) { + cpu--; + goto out; + } + } +out: + *base_cpu = cpu; + return tlist; +} + +#define MPIDR_TO_SGI_AFFINITY(cluster_id, level) \ + (MPIDR_AFFINITY_LEVEL(cluster_id, level) \ + << ICC_SGI1R_AFFINITY_## level ##_SHIFT) + +static void gic_send_sgi(u64 cluster_id, u16 tlist, unsigned int irq) +{ + u64 val; + + val = (MPIDR_TO_SGI_AFFINITY(cluster_id, 3) | + MPIDR_TO_SGI_AFFINITY(cluster_id, 2) | + irq << ICC_SGI1R_SGI_ID_SHIFT | + MPIDR_TO_SGI_AFFINITY(cluster_id, 1) | + MPIDR_TO_SGI_RS(cluster_id) | + tlist << ICC_SGI1R_TARGET_LIST_SHIFT); + + pr_devel("CPU%d: ICC_SGI1R_EL1 %llx\n", smp_processor_id(), val); + gic_write_sgi1r(val); +} + +static void gic_raise_softirq(const struct cpumask *mask, unsigned int irq) +{ + int cpu; + + if (WARN_ON(irq >= 16)) + return; + + /* + * Ensure that stores to Normal memory are visible to the + * other CPUs before issuing the IPI. + */ + wmb(); + + for_each_cpu(cpu, mask) { + u64 cluster_id = MPIDR_TO_SGI_CLUSTER_ID(cpu_logical_map(cpu)); + u16 tlist; + + tlist = gic_compute_target_list(&cpu, mask, cluster_id); + gic_send_sgi(cluster_id, tlist, irq); + } + + /* Force the above writes to ICC_SGI1R_EL1 to be executed */ + isb(); +} + +static void gic_smp_init(void) +{ + set_smp_cross_call(gic_raise_softirq); + cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_GIC_STARTING, + "irqchip/arm/gic_phytium_2500:starting", + gic_starting_cpu, NULL); +} + +static int gic_cpumask_select(struct irq_data *d, const struct cpumask *mask_val) +{ + unsigned int skt, irq_skt, i; + unsigned int cpu, cpus = 0; + unsigned int skt_cpu_cnt[MAX_MARS3_SOC_COUNT] = {0}; + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SOC_COUNT)) + skt_cpu_cnt[skt]++; + else if (skt != 0xff) + pr_err("socket address: %d is out of range.", skt); + } + + irq_skt = mars3_irq_to_skt(gic_irq(d)); + + if (0 != irq_skt) { + for (i = 0; i < irq_skt; i++) + cpus += skt_cpu_cnt[i]; + } + + cpu = cpumask_any_and(mask_val, cpu_online_mask); + if ((cpu > cpus) && (cpu < (cpus + skt_cpu_cnt[irq_skt]))) + cpus = cpu; + + if (is_kdump_kernel()) { + skt = (cpu_logical_map(cpu) >> 16) & 0xff; + if (irq_skt == skt) { + return cpu; + } + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SOC_COUNT)) { + if (irq_skt == skt) { + return i; + } + } else if (0xff != skt) { + pr_err("socket address: %d is out of range.", skt); + } + } + } + return cpus; +} + +static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val, + bool force) +{ + unsigned int cpu, skt; + void __iomem *reg; + int enabled; + u64 val; + + if (force) + cpu = cpumask_first(mask_val); + else + cpu = gic_cpumask_select(d, mask_val); + + if (cpu >= nr_cpu_ids) + return -EINVAL; + + if (gic_irq_in_rdist(d)) + return -EINVAL; + + /* If interrupt was enabled, disable it first */ + enabled = gic_peek_irq(d, GICD_ISENABLER); + if (enabled) + gic_mask_irq(d); + + skt = mars3_irq_to_skt(gic_irq(d)); + reg = mars3_gic_dists[skt].dist_base + GICD_IROUTER + (gic_irq(d) * 8); + val = gic_mpidr_to_affinity(cpu_logical_map(cpu)); + + gic_write_irouter(val, reg); + + /* + * If the interrupt was enabled, enabled it again. Otherwise, + * just wait for the distributor to have digested our changes. + */ + if (enabled) + gic_unmask_irq(d); + else + gic_dist_wait_for_rwp(); + + irq_data_update_effective_affinity(d, cpumask_of(cpu)); + + return IRQ_SET_MASK_OK_DONE; +} +#else +#define gic_set_affinity NULL +#define gic_smp_init() do { } while (0) +#endif + +static int gic_retrigger(struct irq_data *data) +{ + return !gic_irq_set_irqchip_state(data, IRQCHIP_STATE_PENDING, true); +} + +#ifdef CONFIG_CPU_PM +static int gic_cpu_pm_notifier(struct notifier_block *self, + unsigned long cmd, void *v) +{ + if (cmd == CPU_PM_EXIT) { + if (gic_dist_security_disabled()) + gic_enable_redist(true); + gic_cpu_sys_reg_init(); + } else if (cmd == CPU_PM_ENTER && gic_dist_security_disabled()) { + gic_write_grpen1(0); + gic_enable_redist(false); + } + return NOTIFY_OK; +} + +static struct notifier_block gic_cpu_pm_notifier_block = { + .notifier_call = gic_cpu_pm_notifier, +}; + +static void gic_cpu_pm_init(void) +{ + cpu_pm_register_notifier(&gic_cpu_pm_notifier_block); +} + +#else +static inline void gic_cpu_pm_init(void) { } +#endif /* CONFIG_CPU_PM */ + +static struct irq_chip gic_chip = { + .name = "GIC-Phytium-2500", + .irq_mask = gic_mask_irq, + .irq_unmask = gic_unmask_irq, + .irq_eoi = gic_eoi_irq, + .irq_set_type = gic_set_type, + .irq_set_affinity = gic_set_affinity, + .irq_retrigger = gic_retrigger, + .irq_get_irqchip_state = gic_irq_get_irqchip_state, + .irq_set_irqchip_state = gic_irq_set_irqchip_state, + .irq_nmi_setup = gic_irq_nmi_setup, + .irq_nmi_teardown = gic_irq_nmi_teardown, + .flags = IRQCHIP_SET_TYPE_MASKED | + IRQCHIP_SKIP_SET_WAKE | + IRQCHIP_MASK_ON_SUSPEND, +}; + +static struct irq_chip gic_eoimode1_chip = { + .name = "GIC-Phytium-2500", + .irq_mask = gic_eoimode1_mask_irq, + .irq_unmask = gic_unmask_irq, + .irq_eoi = gic_eoimode1_eoi_irq, + .irq_set_type = gic_set_type, + .irq_set_affinity = gic_set_affinity, + .irq_retrigger = gic_retrigger, + .irq_get_irqchip_state = gic_irq_get_irqchip_state, + .irq_set_irqchip_state = gic_irq_set_irqchip_state, + .irq_set_vcpu_affinity = gic_irq_set_vcpu_affinity, + .irq_nmi_setup = gic_irq_nmi_setup, + .irq_nmi_teardown = gic_irq_nmi_teardown, + .flags = IRQCHIP_SET_TYPE_MASKED | + IRQCHIP_SKIP_SET_WAKE | + IRQCHIP_MASK_ON_SUSPEND, +}; + +#define GIC_ID_NR (1U << GICD_TYPER_ID_BITS(gic_data.rdists.gicd_typer)) + +static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + struct irq_chip *chip = &gic_chip; + struct irq_data *irqd = irq_desc_get_irq_data(irq_to_desc(irq)); + + if (static_branch_likely(&supports_deactivate_key)) + chip = &gic_eoimode1_chip; + + /* SGIs are private to the core kernel */ + if (hw < 16) + return -EPERM; + /* Nothing here */ + if (hw >= gic_data.irq_nr && hw < 8192) + return -EPERM; + /* Off limits */ + if (hw >= GIC_ID_NR) + return -EPERM; + + /* PPIs */ + if (hw < 32) { + irq_set_percpu_devid(irq); + irq_domain_set_info(d, irq, hw, chip, d->host_data, + handle_percpu_devid_irq, NULL, NULL); + irq_set_status_flags(irq, IRQ_NOAUTOEN); + } + /* SPIs */ + if (hw >= 32 && hw < gic_data.irq_nr) { + irq_domain_set_info(d, irq, hw, chip, d->host_data, + handle_fasteoi_irq, NULL, NULL); + irq_set_probe(irq); + irqd_set_single_target(irqd); + } + /* LPIs */ + if (hw >= 8192 && hw < GIC_ID_NR) { + if (!gic_dist_supports_lpis()) + return -EPERM; + irq_domain_set_info(d, irq, hw, chip, d->host_data, + handle_fasteoi_irq, NULL, NULL); + } + + /* Prevents SW retriggers which mess up the ACK/EOI ordering */ + irqd_set_handle_enforce_irqctx(irqd); + return 0; +} + +#define GIC_IRQ_TYPE_PARTITION (GIC_IRQ_TYPE_LPI + 1) + +static int gic_irq_domain_translate(struct irq_domain *d, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + if (is_of_node(fwspec->fwnode)) { + if (fwspec->param_count < 3) + return -EINVAL; + + switch (fwspec->param[0]) { + case 0: /* SPI */ + *hwirq = fwspec->param[1] + 32; + break; + case 1: /* PPI */ + case GIC_IRQ_TYPE_PARTITION: + *hwirq = fwspec->param[1] + 16; + break; + case GIC_IRQ_TYPE_LPI: /* LPI */ + *hwirq = fwspec->param[1]; + break; + default: + return -EINVAL; + } + + *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; + + /* + * Make it clear that broken DTs are... broken. + * Partitionned PPIs are an unfortunate exception. + */ + WARN_ON(*type == IRQ_TYPE_NONE && + fwspec->param[0] != GIC_IRQ_TYPE_PARTITION); + return 0; + } + + if (is_fwnode_irqchip(fwspec->fwnode)) { + if (fwspec->param_count != 2) + return -EINVAL; + + *hwirq = fwspec->param[0]; + *type = fwspec->param[1]; + + WARN_ON(*type == IRQ_TYPE_NONE); + return 0; + } + + return -EINVAL; +} + +static int gic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + int i, ret; + irq_hw_number_t hwirq; + unsigned int type = IRQ_TYPE_NONE; + struct irq_fwspec *fwspec = arg; + + ret = gic_irq_domain_translate(domain, fwspec, &hwirq, &type); + if (ret) + return ret; + + for (i = 0; i < nr_irqs; i++) { + ret = gic_irq_domain_map(domain, virq + i, hwirq + i); + if (ret) + return ret; + } + + return 0; +} + +static void gic_irq_domain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) +{ + int i; + + for (i = 0; i < nr_irqs; i++) { + struct irq_data *d = irq_domain_get_irq_data(domain, virq + i); + irq_set_handler(virq + i, NULL); + irq_domain_reset_irq_data(d); + } +} + +static int gic_irq_domain_select(struct irq_domain *d, + struct irq_fwspec *fwspec, + enum irq_domain_bus_token bus_token) +{ + /* Not for us */ + if (fwspec->fwnode != d->fwnode) + return 0; + + /* If this is not DT, then we have a single domain */ + if (!is_of_node(fwspec->fwnode)) + return 1; + + /* + * If this is a PPI and we have a 4th (non-null) parameter, + * then we need to match the partition domain. + */ + if (fwspec->param_count >= 4 && + fwspec->param[0] == 1 && fwspec->param[3] != 0) + return d == partition_get_domain(gic_data.ppi_descs[fwspec->param[1]]); + + return d == gic_data.domain; +} + +static const struct irq_domain_ops gic_irq_domain_ops = { + .translate = gic_irq_domain_translate, + .alloc = gic_irq_domain_alloc, + .free = gic_irq_domain_free, + .select = gic_irq_domain_select, +}; + +static int partition_domain_translate(struct irq_domain *d, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + struct device_node *np; + int ret; + + np = of_find_node_by_phandle(fwspec->param[3]); + if (WARN_ON(!np)) + return -EINVAL; + + ret = partition_translate_id(gic_data.ppi_descs[fwspec->param[1]], + of_node_to_fwnode(np)); + if (ret < 0) + return ret; + + *hwirq = ret; + *type = fwspec->param[2] & IRQ_TYPE_SENSE_MASK; + + return 0; +} + +static const struct irq_domain_ops partition_domain_ops = { + .translate = partition_domain_translate, + .select = gic_irq_domain_select, +}; + +static void gic_enable_nmi_support(void) +{ + int i; + + for (i = 0; i < 16; i++) + refcount_set(&ppi_nmi_refs[i], 0); + + /* + * Linux itself doesn't use 1:N distribution, so has no need to + * set PMHE. The only reason to have it set is if EL3 requires it + * (and we can't change it). + */ + + static_branch_enable(&supports_pseudo_nmis); + + if (static_branch_likely(&supports_deactivate_key)) + gic_eoimode1_chip.flags |= IRQCHIP_SUPPORTS_NMI; + else + gic_chip.flags |= IRQCHIP_SUPPORTS_NMI; +} + +static int __init gic_init_bases(void __iomem *dist_base, + struct redist_region *rdist_regs, + u32 nr_redist_regions, + u64 redist_stride, + struct fwnode_handle *handle) +{ + u32 typer; + int gic_irqs; + int err; + + if (!is_hyp_mode_available()) + static_branch_disable(&supports_deactivate_key); + + if (static_branch_likely(&supports_deactivate_key)) + pr_info("GIC: Using split EOI/Deactivate mode\n"); + + gic_data.fwnode = handle; + gic_data.dist_base = dist_base; + gic_data.redist_regions = rdist_regs; + gic_data.nr_redist_regions = nr_redist_regions; + gic_data.redist_stride = redist_stride; + + /* + * Find out how many interrupts are supported. + * The GIC only supports up to 1020 interrupt sources (SGI+PPI+SPI) + */ + typer = readl_relaxed(gic_data.dist_base + GICD_TYPER); + gic_data.rdists.gicd_typer = typer; + gic_irqs = GICD_TYPER_IRQS(typer); + if (gic_irqs > 1020) + gic_irqs = 1020; + gic_data.irq_nr = gic_irqs; + + gic_data.domain = irq_domain_create_tree(handle, &gic_irq_domain_ops, + &gic_data); + irq_domain_update_bus_token(gic_data.domain, DOMAIN_BUS_WIRED); + gic_data.rdists.rdist = alloc_percpu(typeof(*gic_data.rdists.rdist)); + gic_data.rdists.has_vlpis = true; + gic_data.rdists.has_direct_lpi = true; + + if (WARN_ON(!gic_data.domain) || WARN_ON(!gic_data.rdists.rdist)) { + err = -ENOMEM; + goto out_free; + } + + gic_data.has_rss = !!(typer & GICD_TYPER_RSS); + pr_info("Distributor has %sRange Selector support\n", + gic_data.has_rss ? "" : "no "); + + + set_handle_irq(gic_handle_irq); + + gic_update_vlpi_properties(); + + /* + * NMI backtrace DFX need check nmi support, this should be + * called before enable NMI backtrace DFX. + */ + if (gic_prio_masking_enabled()) { + if (!gic_has_group0() || gic_dist_security_disabled()) + gic_enable_nmi_support(); + else + pr_warn("SCR_EL3.FIQ is cleared, cannot enable use of pseudo-NMIs\n"); + } + + gic_smp_init(); + gic_dist_init(); + gic_cpu_init(); + gic_cpu_pm_init(); + + if (gic_dist_supports_lpis()) { + phytium_its_init(handle, &gic_data.rdists, gic_data.domain); + phytium_its_cpu_init(); + } + + return 0; + +out_free: + if (gic_data.domain) + irq_domain_remove(gic_data.domain); + free_percpu(gic_data.rdists.rdist); + return err; +} + +static int __init gic_validate_dist_version(void __iomem *dist_base) +{ + u32 reg = readl_relaxed(dist_base + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK; + + if (reg != GIC_PIDR2_ARCH_GICv3 && reg != GIC_PIDR2_ARCH_GICv4) + return -ENODEV; + + return 0; +} + +/* Create all possible partitions at boot time */ +static void __init gic_populate_ppi_partitions(struct device_node *gic_node) +{ + struct device_node *parts_node, *child_part; + int part_idx = 0, i; + int nr_parts; + struct partition_affinity *parts; + + parts_node = of_get_child_by_name(gic_node, "ppi-partitions"); + if (!parts_node) + return; + + nr_parts = of_get_child_count(parts_node); + + if (!nr_parts) + goto out_put_node; + + parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL); + if (WARN_ON(!parts)) + goto out_put_node; + + for_each_child_of_node(parts_node, child_part) { + struct partition_affinity *part; + int n; + + part = &parts[part_idx]; + + part->partition_id = of_node_to_fwnode(child_part); + + pr_info("GIC: PPI partition %s[%d] { ", + child_part->name, part_idx); + + n = of_property_count_elems_of_size(child_part, "affinity", + sizeof(u32)); + WARN_ON(n <= 0); + + for (i = 0; i < n; i++) { + int err, cpu; + u32 cpu_phandle; + struct device_node *cpu_node; + + err = of_property_read_u32_index(child_part, "affinity", + i, &cpu_phandle); + if (WARN_ON(err)) + continue; + + cpu_node = of_find_node_by_phandle(cpu_phandle); + if (WARN_ON(!cpu_node)) + continue; + + cpu = of_cpu_node_to_id(cpu_node); + if (WARN_ON(cpu < 0)) + continue; + + pr_cont("%pOF[%d] ", cpu_node, cpu); + + cpumask_set_cpu(cpu, &part->mask); + } + + pr_cont("}\n"); + part_idx++; + } + + for (i = 0; i < 16; i++) { + unsigned int irq; + struct partition_desc *desc; + struct irq_fwspec ppi_fwspec = { + .fwnode = gic_data.fwnode, + .param_count = 3, + .param = { + [0] = GIC_IRQ_TYPE_PARTITION, + [1] = i, + [2] = IRQ_TYPE_NONE, + }, + }; + + irq = irq_create_fwspec_mapping(&ppi_fwspec); + if (WARN_ON(!irq)) + continue; + desc = partition_create_desc(gic_data.fwnode, parts, nr_parts, + irq, &partition_domain_ops); + if (WARN_ON(!desc)) + continue; + + gic_data.ppi_descs[i] = desc; + } + +out_put_node: + of_node_put(parts_node); +} + +static void __init gic_of_setup_kvm_info(struct device_node *node) +{ + int ret; + struct resource r; + u32 gicv_idx; + + gic_v3_kvm_info.type = GIC_V3; + + gic_v3_kvm_info.maint_irq = irq_of_parse_and_map(node, 0); + if (!gic_v3_kvm_info.maint_irq) + return; + + if (of_property_read_u32(node, "#redistributor-regions", + &gicv_idx)) + gicv_idx = 1; + + gicv_idx += 3; /* Also skip GICD, GICC, GICH */ + ret = of_address_to_resource(node, gicv_idx, &r); + if (!ret) + gic_v3_kvm_info.vcpu = r; + + gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis; + gic_set_kvm_info(&gic_v3_kvm_info); +} + +static int __init gic_of_init(struct device_node *node, struct device_node *parent) +{ + void __iomem *dist_base; + struct redist_region *rdist_regs; + u64 redist_stride; + u32 nr_redist_regions; + int err, i, skt; + struct resource res; + + dist_base = of_iomap(node, 0); + if (!dist_base) { + pr_err("%pOF: unable to map gic dist registers\n", node); + return -ENXIO; + } + + err = gic_validate_dist_version(dist_base); + if (err) { + pr_err("%pOF: no distributor detected, giving up\n", node); + goto out_unmap_dist; + } + + if (of_address_to_resource(node, 0, &res)) { + goto out_unmap_dist; + } + + mars3_gic_dists[0].phys_base = res.start; + mars3_gic_dists[0].size = resource_size(&res); + mars3_gic_dists[0].dist_base = dist_base; + + if (of_property_read_u32(node, "#mars3-soc-bitmap", &mars3_sockets_bitmap)) + mars3_sockets_bitmap = 0x1; + + for (skt = 1; skt < MAX_MARS3_SOC_COUNT; skt++) { + if ((((unsigned int)1 << skt) & mars3_sockets_bitmap) == 0) + continue; + + mars3_gic_dists[skt].phys_base = ((unsigned long)skt << MARS3_ADDR_SKTID_SHIFT) | + mars3_gic_dists[0].phys_base; + mars3_gic_dists[skt].size = mars3_gic_dists[0].size; + mars3_gic_dists[skt].dist_base = ioremap(mars3_gic_dists[skt].phys_base, + mars3_gic_dists[skt].size); + } + + if (of_property_read_u32(node, "#redistributor-regions", &nr_redist_regions)) + nr_redist_regions = 1; + + rdist_regs = kcalloc(nr_redist_regions, sizeof(*rdist_regs), + GFP_KERNEL); + if (!rdist_regs) { + err = -ENOMEM; + goto out_unmap_dist; + } + + for (i = 0; i < nr_redist_regions; i++) { + struct resource res; + int ret; + + ret = of_address_to_resource(node, 1 + i, &res); + rdist_regs[i].redist_base = of_iomap(node, 1 + i); + if (ret || !rdist_regs[i].redist_base) { + pr_err("%pOF: couldn't map region %d\n", node, i); + err = -ENODEV; + goto out_unmap_rdist; + } + rdist_regs[i].phys_base = res.start; + } + + if (of_property_read_u64(node, "redistributor-stride", &redist_stride)) + redist_stride = 0; + + err = gic_init_bases(dist_base, rdist_regs, nr_redist_regions, + redist_stride, &node->fwnode); + if (err) + goto out_unmap_rdist; + + gic_populate_ppi_partitions(node); + + if (static_branch_likely(&supports_deactivate_key)) + gic_of_setup_kvm_info(node); + return 0; + +out_unmap_rdist: + for (i = 0; i < nr_redist_regions; i++) + if (rdist_regs[i].redist_base) + iounmap(rdist_regs[i].redist_base); + kfree(rdist_regs); +out_unmap_dist: + iounmap(dist_base); + return err; +} + +IRQCHIP_DECLARE(gic_phyt_2500, "arm,gic-phytium-2500", gic_of_init); + +#ifdef CONFIG_ACPI +static struct +{ + void __iomem *dist_base; + struct redist_region *redist_regs; + u32 nr_redist_regions; + bool single_redist; + int enabled_rdists; + u32 maint_irq; + int maint_irq_mode; + phys_addr_t vcpu_base; +} acpi_data __initdata; + +static int gic_mars3_sockets_bitmap(void) +{ + unsigned int skt, i; + int skt_bitmap = 0; + unsigned int skt_cpu_cnt[MAX_MARS3_SOC_COUNT] = {0}; + + for (i = 0; i < nr_cpu_ids; i++) { + skt = (cpu_logical_map(i) >> 16) & 0xff; + if ((skt >= 0) && (skt < MAX_MARS3_SOC_COUNT)) + skt_cpu_cnt[skt]++; + else if (skt != 0xff) + pr_err("socket address: %d is out of range.", skt); + } + + for (i = 0; i < MAX_MARS3_SOC_COUNT; i++) { + if (skt_cpu_cnt[i] > 0) + skt_bitmap |= (1 << i); + } + + return skt_bitmap; +} + +static void __init +gic_acpi_register_redist(phys_addr_t phys_base, void __iomem *redist_base) +{ + static int count; + + acpi_data.redist_regs[count].phys_base = phys_base; + acpi_data.redist_regs[count].redist_base = redist_base; + acpi_data.redist_regs[count].single_redist = acpi_data.single_redist; + count++; +} + +static int __init +gic_acpi_parse_madt_redist(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_redistributor *redist = + (struct acpi_madt_generic_redistributor *)header; + void __iomem *redist_base; + + redist_base = ioremap(redist->base_address, redist->length); + if (!redist_base) { + pr_err("Couldn't map GICR region @%llx\n", redist->base_address); + return -ENOMEM; + } + + gic_acpi_register_redist(redist->base_address, redist_base); + return 0; +} + +static int __init +gic_acpi_parse_madt_gicc(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_interrupt *gicc = + (struct acpi_madt_generic_interrupt *)header; + u32 reg = readl_relaxed(acpi_data.dist_base + GICD_PIDR2) & GIC_PIDR2_ARCH_MASK; + u32 size = reg == GIC_PIDR2_ARCH_GICv4 ? SZ_64K * 4 : SZ_64K * 2; + void __iomem *redist_base; + + /* GICC entry which has !ACPI_MADT_ENABLED is not unusable so skip */ + if (!(gicc->flags & ACPI_MADT_ENABLED)) + return 0; + + redist_base = ioremap(gicc->gicr_base_address, size); + if (!redist_base) + return -ENOMEM; + + gic_acpi_register_redist(gicc->gicr_base_address, redist_base); + return 0; +} + +static int __init gic_acpi_collect_gicr_base(void) +{ + acpi_tbl_entry_handler redist_parser; + enum acpi_madt_type type; + + if (acpi_data.single_redist) { + type = ACPI_MADT_TYPE_GENERIC_INTERRUPT; + redist_parser = gic_acpi_parse_madt_gicc; + } else { + type = ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR; + redist_parser = gic_acpi_parse_madt_redist; + } + + /* Collect redistributor base addresses in GICR entries */ + if (acpi_table_parse_madt(type, redist_parser, 0) > 0) + return 0; + + pr_info("No valid GICR entries exist\n"); + return -ENODEV; +} + +static int __init gic_acpi_match_gicr(struct acpi_subtable_header *header, + const unsigned long end) +{ + /* Subtable presence means that redist exists, that's it */ + return 0; +} + +static int __init gic_acpi_match_gicc(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_interrupt *gicc = + (struct acpi_madt_generic_interrupt *)header; + + /* + * If GICC is enabled and has valid gicr base address, then it means + * GICR base is presented via GICC + */ + if ((gicc->flags & ACPI_MADT_ENABLED) && gicc->gicr_base_address) { + acpi_data.enabled_rdists++; + return 0; + } + + /* + * It's perfectly valid firmware can pass disabled GICC entry, driver + * should not treat as errors, skip the entry instead of probe fail. + */ + if (!(gicc->flags & ACPI_MADT_ENABLED)) + return 0; + + return -ENODEV; +} + +static int __init gic_acpi_count_gicr_regions(void) +{ + int count; + + /* + * Count how many redistributor regions we have. It is not allowed + * to mix redistributor description, GICR and GICC subtables have to be + * mutually exclusive. + */ + count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR, + gic_acpi_match_gicr, 0); + if (count > 0) { + acpi_data.single_redist = false; + return count; + } + + count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT, + gic_acpi_match_gicc, 0); + if (count > 0) { + acpi_data.single_redist = true; + count = acpi_data.enabled_rdists; + } + + return count; +} + +static bool __init acpi_validate_gic_table(struct acpi_subtable_header *header, + struct acpi_probe_entry *ape) +{ + struct acpi_madt_generic_distributor *dist; + int count; + + dist = (struct acpi_madt_generic_distributor *)header; + if (dist->version != ape->driver_data) + return false; + + /* We need to do that exercise anyway, the sooner the better */ + count = gic_acpi_count_gicr_regions(); + if (count <= 0) + return false; + + acpi_data.nr_redist_regions = count; + return true; +} + +static int __init gic_acpi_parse_virt_madt_gicc(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_interrupt *gicc = + (struct acpi_madt_generic_interrupt *)header; + int maint_irq_mode; + static int first_madt = true; + + /* Skip unusable CPUs */ + if (!(gicc->flags & ACPI_MADT_ENABLED)) + return 0; + + maint_irq_mode = (gicc->flags & ACPI_MADT_VGIC_IRQ_MODE) ? + ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE; + + if (first_madt) { + first_madt = false; + + acpi_data.maint_irq = gicc->vgic_interrupt; + acpi_data.maint_irq_mode = maint_irq_mode; + acpi_data.vcpu_base = gicc->gicv_base_address; + + return 0; + } + + /* + * The maintenance interrupt and GICV should be the same for every CPU + */ + if ((acpi_data.maint_irq != gicc->vgic_interrupt) || + (acpi_data.maint_irq_mode != maint_irq_mode) || + (acpi_data.vcpu_base != gicc->gicv_base_address)) + return -EINVAL; + + return 0; +} + +static bool __init gic_acpi_collect_virt_info(void) +{ + int count; + + count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT, + gic_acpi_parse_virt_madt_gicc, 0); + + return (count > 0); +} + +#define ACPI_GICV3_DIST_MEM_SIZE (SZ_64K) +#define ACPI_GICV2_VCTRL_MEM_SIZE (SZ_4K) +#define ACPI_GICV2_VCPU_MEM_SIZE (SZ_8K) + +static void __init gic_acpi_setup_kvm_info(void) +{ + int irq; + + if (!gic_acpi_collect_virt_info()) { + pr_warn("Unable to get hardware information used for virtualization\n"); + return; + } + + gic_v3_kvm_info.type = GIC_V3; + + irq = acpi_register_gsi(NULL, acpi_data.maint_irq, + acpi_data.maint_irq_mode, + ACPI_ACTIVE_HIGH); + if (irq <= 0) + return; + + gic_v3_kvm_info.maint_irq = irq; + + if (acpi_data.vcpu_base) { + struct resource *vcpu = &gic_v3_kvm_info.vcpu; + + vcpu->flags = IORESOURCE_MEM; + vcpu->start = acpi_data.vcpu_base; + vcpu->end = vcpu->start + ACPI_GICV2_VCPU_MEM_SIZE - 1; + } + + gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis; + gic_set_kvm_info(&gic_v3_kvm_info); +} + +static int __init +gic_acpi_init(struct acpi_subtable_header *header, const unsigned long end) +{ + struct acpi_madt_generic_distributor *dist; + struct fwnode_handle *domain_handle; + size_t size; + int i, err, skt; + + /* Get distributor base address */ + dist = (struct acpi_madt_generic_distributor *)header; + acpi_data.dist_base = ioremap(dist->base_address, + ACPI_GICV3_DIST_MEM_SIZE); + if (!acpi_data.dist_base) { + pr_err("Unable to map GICD registers\n"); + return -ENOMEM; + } + + err = gic_validate_dist_version(acpi_data.dist_base); + if (err) { + pr_err("No distributor detected at @%p, giving up\n", + acpi_data.dist_base); + goto out_dist_unmap; + } + + mars3_gic_dists[0].phys_base = dist->base_address; + mars3_gic_dists[0].size = ACPI_GICV3_DIST_MEM_SIZE; + mars3_gic_dists[0].dist_base = acpi_data.dist_base; + + mars3_sockets_bitmap = gic_mars3_sockets_bitmap(); + if (is_kdump_kernel()) { + mars3_sockets_bitmap = 0x3; + } + if (mars3_sockets_bitmap == 0) { + mars3_sockets_bitmap = 0x1; + pr_err("No socket, please check cpus MPIDR_AFFINITY_LEVEL!"); + } else + pr_info("mars3_sockets_bitmap = 0x%x\n", mars3_sockets_bitmap); + + for (skt = 1; skt < MAX_MARS3_SOC_COUNT; skt++) { + if ((((unsigned int)1 << skt) & mars3_sockets_bitmap) == 0) + continue; + + mars3_gic_dists[skt].phys_base = ((unsigned long)skt << MARS3_ADDR_SKTID_SHIFT) | + mars3_gic_dists[0].phys_base; + mars3_gic_dists[skt].size = mars3_gic_dists[0].size; + mars3_gic_dists[skt].dist_base = ioremap(mars3_gic_dists[skt].phys_base, + mars3_gic_dists[skt].size); + } + + size = sizeof(*acpi_data.redist_regs) * acpi_data.nr_redist_regions; + acpi_data.redist_regs = kzalloc(size, GFP_KERNEL); + if (!acpi_data.redist_regs) { + err = -ENOMEM; + goto out_dist_unmap; + } + + err = gic_acpi_collect_gicr_base(); + if (err) + goto out_redist_unmap; + + domain_handle = irq_domain_alloc_fwnode(acpi_data.dist_base); + if (!domain_handle) { + err = -ENOMEM; + goto out_redist_unmap; + } + + err = gic_init_bases(acpi_data.dist_base, acpi_data.redist_regs, + acpi_data.nr_redist_regions, 0, domain_handle); + if (err) + goto out_fwhandle_free; + + acpi_set_irq_model(ACPI_IRQ_MODEL_GIC, domain_handle); + + if (static_branch_likely(&supports_deactivate_key)) + gic_acpi_setup_kvm_info(); + + return 0; + +out_fwhandle_free: + irq_domain_free_fwnode(domain_handle); +out_redist_unmap: + for (i = 0; i < acpi_data.nr_redist_regions; i++) + if (acpi_data.redist_regs[i].redist_base) + iounmap(acpi_data.redist_regs[i].redist_base); + kfree(acpi_data.redist_regs); +out_dist_unmap: + iounmap(acpi_data.dist_base); + return err; +} +IRQCHIP_ACPI_DECLARE(gic_phyt_2500, ACPI_MADT_TYPE_PHYTIUM_2500, + acpi_validate_gic_table, ACPI_MADT_GIC_VERSION_V3, + gic_acpi_init); +#endif diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h index 20fa5e60e328c..476d0f6188c62 100644 --- a/include/acpi/actbl2.h +++ b/include/acpi/actbl2.h @@ -503,7 +503,8 @@ enum acpi_madt_type { ACPI_MADT_TYPE_GENERIC_MSI_FRAME = 13, ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR = 14, ACPI_MADT_TYPE_GENERIC_TRANSLATOR = 15, - ACPI_MADT_TYPE_RESERVED = 16 /* 16 and greater are reserved */ + ACPI_MADT_TYPE_RESERVED = 16, + ACPI_MADT_TYPE_PHYTIUM_2500 = 128 }; /* diff --git a/include/linux/irqchip/arm-gic-phytium-2500.h b/include/linux/irqchip/arm-gic-phytium-2500.h new file mode 100644 index 0000000000000..57e7b749b9fd2 --- /dev/null +++ b/include/linux/irqchip/arm-gic-phytium-2500.h @@ -0,0 +1,640 @@ +/* + *Copyright (C) 2021 Phytium Corporation. + *Author: Wang Yinfeng <wangyinfeng(a)phytium.com.cn> + * Chen Baozi <chenbaozi(a)phytium.com.cn> + * Mao hongbo <maohongbo(a)phytium.com.cn> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef __LINUX_IRQCHIP_ARM_GIC_PHYTIUM_2500_H +#define __LINUX_IRQCHIP_ARM_GIC_PHYTIUM_2500_H + +/* + * Distributor registers. We assume we're running non-secure, with ARE + * being set. Secure-only and non-ARE registers are not described. + */ +#define GICD_CTLR 0x0000 +#define GICD_TYPER 0x0004 +#define GICD_IIDR 0x0008 +#define GICD_STATUSR 0x0010 +#define GICD_SETSPI_NSR 0x0040 +#define GICD_CLRSPI_NSR 0x0048 +#define GICD_SETSPI_SR 0x0050 +#define GICD_CLRSPI_SR 0x0058 +#define GICD_SEIR 0x0068 +#define GICD_IGROUPR 0x0080 +#define GICD_ISENABLER 0x0100 +#define GICD_ICENABLER 0x0180 +#define GICD_ISPENDR 0x0200 +#define GICD_ICPENDR 0x0280 +#define GICD_ISACTIVER 0x0300 +#define GICD_ICACTIVER 0x0380 +#define GICD_IPRIORITYR 0x0400 +#define GICD_ICFGR 0x0C00 +#define GICD_IGRPMODR 0x0D00 +#define GICD_NSACR 0x0E00 +#define GICD_IROUTER 0x6000 +#define GICD_IDREGS 0xFFD0 +#define GICD_PIDR2 0xFFE8 + +/* + * Those registers are actually from GICv2, but the spec demands that they + * are implemented as RES0 if ARE is 1 (which we do in KVM's emulated GICv3). + */ +#define GICD_ITARGETSR 0x0800 +#define GICD_SGIR 0x0F00 +#define GICD_CPENDSGIR 0x0F10 +#define GICD_SPENDSGIR 0x0F20 + +#define GICD_CTLR_RWP (1U << 31) +#define GICD_CTLR_DS (1U << 6) +#define GICD_CTLR_ARE_NS (1U << 4) +#define GICD_CTLR_ENABLE_G1A (1U << 1) +#define GICD_CTLR_ENABLE_G1 (1U << 0) + +#define GICD_IIDR_IMPLEMENTER_SHIFT 0 +#define GICD_IIDR_IMPLEMENTER_MASK (0xfff << GICD_IIDR_IMPLEMENTER_SHIFT) +#define GICD_IIDR_REVISION_SHIFT 12 +#define GICD_IIDR_REVISION_MASK (0xf << GICD_IIDR_REVISION_SHIFT) +#define GICD_IIDR_VARIANT_SHIFT 16 +#define GICD_IIDR_VARIANT_MASK (0xf << GICD_IIDR_VARIANT_SHIFT) +#define GICD_IIDR_PRODUCT_ID_SHIFT 24 +#define GICD_IIDR_PRODUCT_ID_MASK (0xff << GICD_IIDR_PRODUCT_ID_SHIFT) + + +/* + * In systems with a single security state (what we emulate in KVM) + * the meaning of the interrupt group enable bits is slightly different + */ +#define GICD_CTLR_ENABLE_SS_G1 (1U << 1) +#define GICD_CTLR_ENABLE_SS_G0 (1U << 0) + +#define GICD_TYPER_RSS (1U << 26) +#define GICD_TYPER_LPIS (1U << 17) +#define GICD_TYPER_MBIS (1U << 16) + +#define GICD_TYPER_ID_BITS(typer) ((((typer) >> 19) & 0x1f) + 1) +#define GICD_TYPER_NUM_LPIS(typer) ((((typer) >> 11) & 0x1f) + 1) +#define GICD_TYPER_IRQS(typer) ((((typer) & 0x1f) + 1) * 32) + +#define GICD_IROUTER_SPI_MODE_ONE (0U << 31) +#define GICD_IROUTER_SPI_MODE_ANY (1U << 31) + +#define GIC_PIDR2_ARCH_MASK 0xf0 +#define GIC_PIDR2_ARCH_GICv3 0x30 +#define GIC_PIDR2_ARCH_GICv4 0x40 + +#define GIC_V3_DIST_SIZE 0x10000 + +/* + * Re-Distributor registers, offsets from RD_base + */ +#define GICR_CTLR GICD_CTLR +#define GICR_IIDR 0x0004 +#define GICR_TYPER 0x0008 +#define GICR_STATUSR GICD_STATUSR +#define GICR_WAKER 0x0014 +#define GICR_SETLPIR 0x0040 +#define GICR_CLRLPIR 0x0048 +#define GICR_SEIR GICD_SEIR +#define GICR_PROPBASER 0x0070 +#define GICR_PENDBASER 0x0078 +#define GICR_INVLPIR 0x00A0 +#define GICR_INVALLR 0x00B0 +#define GICR_SYNCR 0x00C0 +#define GICR_MOVLPIR 0x0100 +#define GICR_MOVALLR 0x0110 +#define GICR_IDREGS GICD_IDREGS +#define GICR_PIDR2 GICD_PIDR2 + +#define GICR_CTLR_ENABLE_LPIS (1UL << 0) +#define GICR_CTLR_RWP (1UL << 3) + +#define GICR_TYPER_CPU_NUMBER(r) (((r) >> 8) & 0xffff) + +#define GICR_WAKER_ProcessorSleep (1U << 1) +#define GICR_WAKER_ChildrenAsleep (1U << 2) + +#define GIC_BASER_CACHE_nCnB 0ULL +#define GIC_BASER_CACHE_SameAsInner 0ULL +#define GIC_BASER_CACHE_nC 1ULL +#define GIC_BASER_CACHE_RaWt 2ULL +#define GIC_BASER_CACHE_RaWb 3ULL +#define GIC_BASER_CACHE_WaWt 4ULL +#define GIC_BASER_CACHE_WaWb 5ULL +#define GIC_BASER_CACHE_RaWaWt 6ULL +#define GIC_BASER_CACHE_RaWaWb 7ULL +#define GIC_BASER_CACHE_MASK 7ULL +#define GIC_BASER_NonShareable 0ULL +#define GIC_BASER_InnerShareable 1ULL +#define GIC_BASER_OuterShareable 2ULL +#define GIC_BASER_SHAREABILITY_MASK 3ULL + +#define GIC_BASER_CACHEABILITY(reg, inner_outer, type) \ + (GIC_BASER_CACHE_##type << reg##_##inner_outer##_CACHEABILITY_SHIFT) + +#define GIC_BASER_SHAREABILITY(reg, type) \ + (GIC_BASER_##type << reg##_SHAREABILITY_SHIFT) + +/* encode a size field of width @w containing @n - 1 units */ +#define GIC_ENCODE_SZ(n, w) (((unsigned long)(n) - 1) & GENMASK_ULL(((w) - 1), 0)) + +#define GICR_PROPBASER_SHAREABILITY_SHIFT (10) +#define GICR_PROPBASER_INNER_CACHEABILITY_SHIFT (7) +#define GICR_PROPBASER_OUTER_CACHEABILITY_SHIFT (56) +#define GICR_PROPBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GICR_PROPBASER, SHAREABILITY_MASK) +#define GICR_PROPBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, MASK) +#define GICR_PROPBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_PROPBASER, OUTER, MASK) +#define GICR_PROPBASER_CACHEABILITY_MASK GICR_PROPBASER_INNER_CACHEABILITY_MASK + +#define GICR_PROPBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GICR_PROPBASER, InnerShareable) + +#define GICR_PROPBASER_nCnB GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, nCnB) +#define GICR_PROPBASER_nC GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, nC) +#define GICR_PROPBASER_RaWt GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, RaWt) +#define GICR_PROPBASER_RaWb GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, RaWb) +#define GICR_PROPBASER_WaWt GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, WaWt) +#define GICR_PROPBASER_WaWb GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, WaWb) +#define GICR_PROPBASER_RaWaWt GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, RaWaWt) +#define GICR_PROPBASER_RaWaWb GIC_BASER_CACHEABILITY(GICR_PROPBASER, INNER, RaWaWb) + +#define GICR_PROPBASER_IDBITS_MASK (0x1f) +#define GICR_PROPBASER_ADDRESS(x) ((x) & GENMASK_ULL(51, 12)) +#define GICR_PENDBASER_ADDRESS(x) ((x) & GENMASK_ULL(51, 16)) + +#define GICR_PENDBASER_SHAREABILITY_SHIFT (10) +#define GICR_PENDBASER_INNER_CACHEABILITY_SHIFT (7) +#define GICR_PENDBASER_OUTER_CACHEABILITY_SHIFT (56) +#define GICR_PENDBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GICR_PENDBASER, SHAREABILITY_MASK) +#define GICR_PENDBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, MASK) +#define GICR_PENDBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_PENDBASER, OUTER, MASK) +#define GICR_PENDBASER_CACHEABILITY_MASK GICR_PENDBASER_INNER_CACHEABILITY_MASK + +#define GICR_PENDBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GICR_PENDBASER, InnerShareable) + +#define GICR_PENDBASER_nCnB GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, nCnB) +#define GICR_PENDBASER_nC GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, nC) +#define GICR_PENDBASER_RaWt GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, RaWt) +#define GICR_PENDBASER_RaWb GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, RaWb) +#define GICR_PENDBASER_WaWt GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, WaWt) +#define GICR_PENDBASER_WaWb GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, WaWb) +#define GICR_PENDBASER_RaWaWt GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, RaWaWt) +#define GICR_PENDBASER_RaWaWb GIC_BASER_CACHEABILITY(GICR_PENDBASER, INNER, RaWaWb) + +#define GICR_PENDBASER_PTZ BIT_ULL(62) + +/* + * Re-Distributor registers, offsets from SGI_base + */ +#define GICR_IGROUPR0 GICD_IGROUPR +#define GICR_ISENABLER0 GICD_ISENABLER +#define GICR_ICENABLER0 GICD_ICENABLER +#define GICR_ISPENDR0 GICD_ISPENDR +#define GICR_ICPENDR0 GICD_ICPENDR +#define GICR_ISACTIVER0 GICD_ISACTIVER +#define GICR_ICACTIVER0 GICD_ICACTIVER +#define GICR_IPRIORITYR0 GICD_IPRIORITYR +#define GICR_ICFGR0 GICD_ICFGR +#define GICR_IGRPMODR0 GICD_IGRPMODR +#define GICR_NSACR GICD_NSACR + +#define GICR_TYPER_PLPIS (1U << 0) +#define GICR_TYPER_VLPIS (1U << 1) +#define GICR_TYPER_DirectLPIS (1U << 3) +#define GICR_TYPER_LAST (1U << 4) + +#define GIC_V3_REDIST_SIZE 0x20000 + +#define LPI_PROP_GROUP1 (1 << 1) +#define LPI_PROP_ENABLED (1 << 0) + +/* + * Re-Distributor registers, offsets from VLPI_base + */ +#define GICR_VPROPBASER 0x0070 + +#define GICR_VPROPBASER_IDBITS_MASK 0x1f + +#define GICR_VPROPBASER_SHAREABILITY_SHIFT (10) +#define GICR_VPROPBASER_INNER_CACHEABILITY_SHIFT (7) +#define GICR_VPROPBASER_OUTER_CACHEABILITY_SHIFT (56) + +#define GICR_VPROPBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GICR_VPROPBASER, SHAREABILITY_MASK) +#define GICR_VPROPBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, MASK) +#define GICR_VPROPBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_VPROPBASER, OUTER, MASK) +#define GICR_VPROPBASER_CACHEABILITY_MASK \ + GICR_VPROPBASER_INNER_CACHEABILITY_MASK + +#define GICR_VPROPBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GICR_VPROPBASER, InnerShareable) + +#define GICR_VPROPBASER_nCnB GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, nCnB) +#define GICR_VPROPBASER_nC GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, nC) +#define GICR_VPROPBASER_RaWt GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, RaWt) +#define GICR_VPROPBASER_RaWb GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, RaWb) +#define GICR_VPROPBASER_WaWt GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, WaWt) +#define GICR_VPROPBASER_WaWb GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, WaWb) +#define GICR_VPROPBASER_RaWaWt GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, RaWaWt) +#define GICR_VPROPBASER_RaWaWb GIC_BASER_CACHEABILITY(GICR_VPROPBASER, INNER, RaWaWb) + +#define GICR_VPENDBASER 0x0078 + +#define GICR_VPENDBASER_SHAREABILITY_SHIFT (10) +#define GICR_VPENDBASER_INNER_CACHEABILITY_SHIFT (7) +#define GICR_VPENDBASER_OUTER_CACHEABILITY_SHIFT (56) +#define GICR_VPENDBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GICR_VPENDBASER, SHAREABILITY_MASK) +#define GICR_VPENDBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, MASK) +#define GICR_VPENDBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GICR_VPENDBASER, OUTER, MASK) +#define GICR_VPENDBASER_CACHEABILITY_MASK \ + GICR_VPENDBASER_INNER_CACHEABILITY_MASK + +#define GICR_VPENDBASER_NonShareable \ + GIC_BASER_SHAREABILITY(GICR_VPENDBASER, NonShareable) + +#define GICR_VPENDBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GICR_VPENDBASER, InnerShareable) + +#define GICR_VPENDBASER_nCnB GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, nCnB) +#define GICR_VPENDBASER_nC GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, nC) +#define GICR_VPENDBASER_RaWt GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, RaWt) +#define GICR_VPENDBASER_RaWb GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, RaWb) +#define GICR_VPENDBASER_WaWt GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, WaWt) +#define GICR_VPENDBASER_WaWb GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, WaWb) +#define GICR_VPENDBASER_RaWaWt GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, RaWaWt) +#define GICR_VPENDBASER_RaWaWb GIC_BASER_CACHEABILITY(GICR_VPENDBASER, INNER, RaWaWb) + +#define GICR_VPENDBASER_Dirty (1ULL << 60) +#define GICR_VPENDBASER_PendingLast (1ULL << 61) +#define GICR_VPENDBASER_IDAI (1ULL << 62) +#define GICR_VPENDBASER_Valid (1ULL << 63) + +/* + * ITS registers, offsets from ITS_base + */ +#define GITS_CTLR 0x0000 +#define GITS_IIDR 0x0004 +#define GITS_TYPER 0x0008 +#define GITS_CBASER 0x0080 +#define GITS_CWRITER 0x0088 +#define GITS_CREADR 0x0090 +#define GITS_BASER 0x0100 +#define GITS_IDREGS_BASE 0xffd0 +#define GITS_PIDR0 0xffe0 +#define GITS_PIDR1 0xffe4 +#define GITS_PIDR2 GICR_PIDR2 +#define GITS_PIDR4 0xffd0 +#define GITS_CIDR0 0xfff0 +#define GITS_CIDR1 0xfff4 +#define GITS_CIDR2 0xfff8 +#define GITS_CIDR3 0xfffc + +#define GITS_TRANSLATER 0x10040 + +#define GITS_CTLR_ENABLE (1U << 0) +#define GITS_CTLR_ImDe (1U << 1) +#define GITS_CTLR_ITS_NUMBER_SHIFT 4 +#define GITS_CTLR_ITS_NUMBER (0xFU << GITS_CTLR_ITS_NUMBER_SHIFT) +#define GITS_CTLR_QUIESCENT (1U << 31) + +#define GITS_TYPER_PLPIS (1UL << 0) +#define GITS_TYPER_VLPIS (1UL << 1) +#define GITS_TYPER_ITT_ENTRY_SIZE_SHIFT 4 +#define GITS_TYPER_ITT_ENTRY_SIZE(r) ((((r) >> GITS_TYPER_ITT_ENTRY_SIZE_SHIFT) & 0xf) + 1) +#define GITS_TYPER_IDBITS_SHIFT 8 +#define GITS_TYPER_DEVBITS_SHIFT 13 +#define GITS_TYPER_DEVBITS(r) ((((r) >> GITS_TYPER_DEVBITS_SHIFT) & 0x1f) + 1) +#define GITS_TYPER_PTA (1UL << 19) +#define GITS_TYPER_HCC_SHIFT 24 +#define GITS_TYPER_HCC(r) (((r) >> GITS_TYPER_HCC_SHIFT) & 0xff) +#define GITS_TYPER_VMOVP (1ULL << 37) + +#define GITS_IIDR_REV_SHIFT 12 +#define GITS_IIDR_REV_MASK (0xf << GITS_IIDR_REV_SHIFT) +#define GITS_IIDR_REV(r) (((r) >> GITS_IIDR_REV_SHIFT) & 0xf) +#define GITS_IIDR_PRODUCTID_SHIFT 24 + +#define GITS_CBASER_VALID (1ULL << 63) +#define GITS_CBASER_SHAREABILITY_SHIFT (10) +#define GITS_CBASER_INNER_CACHEABILITY_SHIFT (59) +#define GITS_CBASER_OUTER_CACHEABILITY_SHIFT (53) +#define GITS_CBASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GITS_CBASER, SHAREABILITY_MASK) +#define GITS_CBASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, MASK) +#define GITS_CBASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GITS_CBASER, OUTER, MASK) +#define GITS_CBASER_CACHEABILITY_MASK GITS_CBASER_INNER_CACHEABILITY_MASK + +#define GITS_CBASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GITS_CBASER, InnerShareable) + +#define GITS_CBASER_nCnB GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, nCnB) +#define GITS_CBASER_nC GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, nC) +#define GITS_CBASER_RaWt GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWt) +#define GITS_CBASER_RaWb GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWb) +#define GITS_CBASER_WaWt GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, WaWt) +#define GITS_CBASER_WaWb GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, WaWb) +#define GITS_CBASER_RaWaWt GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWaWt) +#define GITS_CBASER_RaWaWb GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWaWb) + +#define GITS_CBASER_ADDRESS(cbaser) ((cbaser) & GENMASK_ULL(51, 12)) + +#define GITS_BASER_NR_REGS 8 + +#define GITS_BASER_VALID (1ULL << 63) +#define GITS_BASER_INDIRECT (1ULL << 62) + +#define GITS_BASER_INNER_CACHEABILITY_SHIFT (59) +#define GITS_BASER_OUTER_CACHEABILITY_SHIFT (53) +#define GITS_BASER_INNER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GITS_BASER, INNER, MASK) +#define GITS_BASER_CACHEABILITY_MASK GITS_BASER_INNER_CACHEABILITY_MASK +#define GITS_BASER_OUTER_CACHEABILITY_MASK \ + GIC_BASER_CACHEABILITY(GITS_BASER, OUTER, MASK) +#define GITS_BASER_SHAREABILITY_MASK \ + GIC_BASER_SHAREABILITY(GITS_BASER, SHAREABILITY_MASK) + +#define GITS_BASER_nCnB GIC_BASER_CACHEABILITY(GITS_BASER, INNER, nCnB) +#define GITS_BASER_nC GIC_BASER_CACHEABILITY(GITS_BASER, INNER, nC) +#define GITS_BASER_RaWt GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWt) +#define GITS_BASER_RaWb GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWb) +#define GITS_BASER_WaWt GIC_BASER_CACHEABILITY(GITS_BASER, INNER, WaWt) +#define GITS_BASER_WaWb GIC_BASER_CACHEABILITY(GITS_BASER, INNER, WaWb) +#define GITS_BASER_RaWaWt GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWaWt) +#define GITS_BASER_RaWaWb GIC_BASER_CACHEABILITY(GITS_BASER, INNER, RaWaWb) + +#define GITS_BASER_TYPE_SHIFT (56) +#define GITS_BASER_TYPE(r) (((r) >> GITS_BASER_TYPE_SHIFT) & 7) +#define GITS_BASER_ENTRY_SIZE_SHIFT (48) +#define GITS_BASER_ENTRY_SIZE(r) ((((r) >> GITS_BASER_ENTRY_SIZE_SHIFT) & 0x1f) + 1) +#define GITS_BASER_ENTRY_SIZE_MASK GENMASK_ULL(52, 48) +#define GITS_BASER_PHYS_52_to_48(phys) \ + (((phys) & GENMASK_ULL(47, 16)) | (((phys) >> 48) & 0xf) << 12) +#define GITS_BASER_ADDR_48_to_52(baser) \ + (((baser) & GENMASK_ULL(47, 16)) | (((baser) >> 12) & 0xf) << 48) + +#define GITS_BASER_SHAREABILITY_SHIFT (10) +#define GITS_BASER_InnerShareable \ + GIC_BASER_SHAREABILITY(GITS_BASER, InnerShareable) +#define GITS_BASER_PAGE_SIZE_SHIFT (8) +#define GITS_BASER_PAGE_SIZE_4K (0ULL << GITS_BASER_PAGE_SIZE_SHIFT) +#define GITS_BASER_PAGE_SIZE_16K (1ULL << GITS_BASER_PAGE_SIZE_SHIFT) +#define GITS_BASER_PAGE_SIZE_64K (2ULL << GITS_BASER_PAGE_SIZE_SHIFT) +#define GITS_BASER_PAGE_SIZE_MASK (3ULL << GITS_BASER_PAGE_SIZE_SHIFT) +#define GITS_BASER_PAGES_MAX 256 +#define GITS_BASER_PAGES_SHIFT (0) +#define GITS_BASER_NR_PAGES(r) (((r) & 0xff) + 1) + +#define GITS_BASER_TYPE_NONE 0 +#define GITS_BASER_TYPE_DEVICE 1 +#define GITS_BASER_TYPE_VCPU 2 +#define GITS_BASER_TYPE_RESERVED3 3 +#define GITS_BASER_TYPE_COLLECTION 4 +#define GITS_BASER_TYPE_RESERVED5 5 +#define GITS_BASER_TYPE_RESERVED6 6 +#define GITS_BASER_TYPE_RESERVED7 7 + +#define GITS_LVL1_ENTRY_SIZE (8UL) + +/* + * ITS commands + */ +#define GITS_CMD_MAPD 0x08 +#define GITS_CMD_MAPC 0x09 +#define GITS_CMD_MAPTI 0x0a +#define GITS_CMD_MAPI 0x0b +#define GITS_CMD_MOVI 0x01 +#define GITS_CMD_DISCARD 0x0f +#define GITS_CMD_INV 0x0c +#define GITS_CMD_MOVALL 0x0e +#define GITS_CMD_INVALL 0x0d +#define GITS_CMD_INT 0x03 +#define GITS_CMD_CLEAR 0x04 +#define GITS_CMD_SYNC 0x05 + +/* + * GICv4 ITS specific commands + */ +#define GITS_CMD_GICv4(x) ((x) | 0x20) +#define GITS_CMD_VINVALL GITS_CMD_GICv4(GITS_CMD_INVALL) +#define GITS_CMD_VMAPP GITS_CMD_GICv4(GITS_CMD_MAPC) +#define GITS_CMD_VMAPTI GITS_CMD_GICv4(GITS_CMD_MAPTI) +#define GITS_CMD_VMOVI GITS_CMD_GICv4(GITS_CMD_MOVI) +#define GITS_CMD_VSYNC GITS_CMD_GICv4(GITS_CMD_SYNC) +/* VMOVP is the odd one, as it doesn't have a physical counterpart */ +#define GITS_CMD_VMOVP GITS_CMD_GICv4(2) + +/* + * ITS error numbers + */ +#define E_ITS_MOVI_UNMAPPED_INTERRUPT 0x010107 +#define E_ITS_MOVI_UNMAPPED_COLLECTION 0x010109 +#define E_ITS_INT_UNMAPPED_INTERRUPT 0x010307 +#define E_ITS_CLEAR_UNMAPPED_INTERRUPT 0x010507 +#define E_ITS_MAPD_DEVICE_OOR 0x010801 +#define E_ITS_MAPD_ITTSIZE_OOR 0x010802 +#define E_ITS_MAPC_PROCNUM_OOR 0x010902 +#define E_ITS_MAPC_COLLECTION_OOR 0x010903 +#define E_ITS_MAPTI_UNMAPPED_DEVICE 0x010a04 +#define E_ITS_MAPTI_ID_OOR 0x010a05 +#define E_ITS_MAPTI_PHYSICALID_OOR 0x010a06 +#define E_ITS_INV_UNMAPPED_INTERRUPT 0x010c07 +#define E_ITS_INVALL_UNMAPPED_COLLECTION 0x010d09 +#define E_ITS_MOVALL_PROCNUM_OOR 0x010e01 +#define E_ITS_DISCARD_UNMAPPED_INTERRUPT 0x010f07 + +/* + * CPU interface registers + */ +#define ICC_CTLR_EL1_EOImode_SHIFT (1) +#define ICC_CTLR_EL1_EOImode_drop_dir (0U << ICC_CTLR_EL1_EOImode_SHIFT) +#define ICC_CTLR_EL1_EOImode_drop (1U << ICC_CTLR_EL1_EOImode_SHIFT) +#define ICC_CTLR_EL1_EOImode_MASK (1 << ICC_CTLR_EL1_EOImode_SHIFT) +#define ICC_CTLR_EL1_CBPR_SHIFT 0 +#define ICC_CTLR_EL1_CBPR_MASK (1 << ICC_CTLR_EL1_CBPR_SHIFT) +#define ICC_CTLR_EL1_PMHE_SHIFT 6 +#define ICC_CTLR_EL1_PMHE_MASK (1 << ICC_CTLR_EL1_PMHE_SHIFT) +#define ICC_CTLR_EL1_PRI_BITS_SHIFT 8 +#define ICC_CTLR_EL1_PRI_BITS_MASK (0x7 << ICC_CTLR_EL1_PRI_BITS_SHIFT) +#define ICC_CTLR_EL1_ID_BITS_SHIFT 11 +#define ICC_CTLR_EL1_ID_BITS_MASK (0x7 << ICC_CTLR_EL1_ID_BITS_SHIFT) +#define ICC_CTLR_EL1_SEIS_SHIFT 14 +#define ICC_CTLR_EL1_SEIS_MASK (0x1 << ICC_CTLR_EL1_SEIS_SHIFT) +#define ICC_CTLR_EL1_A3V_SHIFT 15 +#define ICC_CTLR_EL1_A3V_MASK (0x1 << ICC_CTLR_EL1_A3V_SHIFT) +#define ICC_CTLR_EL1_RSS (0x1 << 18) +#define ICC_PMR_EL1_SHIFT 0 +#define ICC_PMR_EL1_MASK (0xff << ICC_PMR_EL1_SHIFT) +#define ICC_BPR0_EL1_SHIFT 0 +#define ICC_BPR0_EL1_MASK (0x7 << ICC_BPR0_EL1_SHIFT) +#define ICC_BPR1_EL1_SHIFT 0 +#define ICC_BPR1_EL1_MASK (0x7 << ICC_BPR1_EL1_SHIFT) +#define ICC_IGRPEN0_EL1_SHIFT 0 +#define ICC_IGRPEN0_EL1_MASK (1 << ICC_IGRPEN0_EL1_SHIFT) +#define ICC_IGRPEN1_EL1_SHIFT 0 +#define ICC_IGRPEN1_EL1_MASK (1 << ICC_IGRPEN1_EL1_SHIFT) +#define ICC_SRE_EL1_DIB (1U << 2) +#define ICC_SRE_EL1_DFB (1U << 1) +#define ICC_SRE_EL1_SRE (1U << 0) + +/* + * Hypervisor interface registers (SRE only) + */ +#define ICH_LR_VIRTUAL_ID_MASK ((1ULL << 32) - 1) + +#define ICH_LR_EOI (1ULL << 41) +#define ICH_LR_GROUP (1ULL << 60) +#define ICH_LR_HW (1ULL << 61) +#define ICH_LR_STATE (3ULL << 62) +#define ICH_LR_PENDING_BIT (1ULL << 62) +#define ICH_LR_ACTIVE_BIT (1ULL << 63) +#define ICH_LR_PHYS_ID_SHIFT 32 +#define ICH_LR_PHYS_ID_MASK (0x3ffULL << ICH_LR_PHYS_ID_SHIFT) +#define ICH_LR_PRIORITY_SHIFT 48 +#define ICH_LR_PRIORITY_MASK (0xffULL << ICH_LR_PRIORITY_SHIFT) + +/* These are for GICv2 emulation only */ +#define GICH_LR_VIRTUALID (0x3ffUL << 0) +#define GICH_LR_PHYSID_CPUID_SHIFT (10) +#define GICH_LR_PHYSID_CPUID (7UL << GICH_LR_PHYSID_CPUID_SHIFT) + +#define ICH_MISR_EOI (1 << 0) +#define ICH_MISR_U (1 << 1) + +#define ICH_HCR_EN (1 << 0) +#define ICH_HCR_UIE (1 << 1) +#define ICH_HCR_NPIE (1 << 3) +#define ICH_HCR_TC (1 << 10) +#define ICH_HCR_TALL0 (1 << 11) +#define ICH_HCR_TALL1 (1 << 12) +#define ICH_HCR_EOIcount_SHIFT 27 +#define ICH_HCR_EOIcount_MASK (0x1f << ICH_HCR_EOIcount_SHIFT) + +#define ICH_VMCR_ACK_CTL_SHIFT 2 +#define ICH_VMCR_ACK_CTL_MASK (1 << ICH_VMCR_ACK_CTL_SHIFT) +#define ICH_VMCR_FIQ_EN_SHIFT 3 +#define ICH_VMCR_FIQ_EN_MASK (1 << ICH_VMCR_FIQ_EN_SHIFT) +#define ICH_VMCR_CBPR_SHIFT 4 +#define ICH_VMCR_CBPR_MASK (1 << ICH_VMCR_CBPR_SHIFT) +#define ICH_VMCR_EOIM_SHIFT 9 +#define ICH_VMCR_EOIM_MASK (1 << ICH_VMCR_EOIM_SHIFT) +#define ICH_VMCR_BPR1_SHIFT 18 +#define ICH_VMCR_BPR1_MASK (7 << ICH_VMCR_BPR1_SHIFT) +#define ICH_VMCR_BPR0_SHIFT 21 +#define ICH_VMCR_BPR0_MASK (7 << ICH_VMCR_BPR0_SHIFT) +#define ICH_VMCR_PMR_SHIFT 24 +#define ICH_VMCR_PMR_MASK (0xffUL << ICH_VMCR_PMR_SHIFT) +#define ICH_VMCR_ENG0_SHIFT 0 +#define ICH_VMCR_ENG0_MASK (1 << ICH_VMCR_ENG0_SHIFT) +#define ICH_VMCR_ENG1_SHIFT 1 +#define ICH_VMCR_ENG1_MASK (1 << ICH_VMCR_ENG1_SHIFT) + +#define ICH_VTR_PRI_BITS_SHIFT 29 +#define ICH_VTR_PRI_BITS_MASK (7 << ICH_VTR_PRI_BITS_SHIFT) +#define ICH_VTR_ID_BITS_SHIFT 23 +#define ICH_VTR_ID_BITS_MASK (7 << ICH_VTR_ID_BITS_SHIFT) +#define ICH_VTR_SEIS_SHIFT 22 +#define ICH_VTR_SEIS_MASK (1 << ICH_VTR_SEIS_SHIFT) +#define ICH_VTR_A3V_SHIFT 21 +#define ICH_VTR_A3V_MASK (1 << ICH_VTR_A3V_SHIFT) + +#define ICC_IAR1_EL1_SPURIOUS 0x3ff + +#define ICC_SRE_EL2_SRE (1 << 0) +#define ICC_SRE_EL2_ENABLE (1 << 3) + +#define ICC_SGI1R_TARGET_LIST_SHIFT 0 +#define ICC_SGI1R_TARGET_LIST_MASK (0xffff << ICC_SGI1R_TARGET_LIST_SHIFT) +#define ICC_SGI1R_AFFINITY_1_SHIFT 16 +#define ICC_SGI1R_AFFINITY_1_MASK (0xff << ICC_SGI1R_AFFINITY_1_SHIFT) +#define ICC_SGI1R_SGI_ID_SHIFT 24 +#define ICC_SGI1R_SGI_ID_MASK (0xfULL << ICC_SGI1R_SGI_ID_SHIFT) +#define ICC_SGI1R_AFFINITY_2_SHIFT 32 +#define ICC_SGI1R_AFFINITY_2_MASK (0xffULL << ICC_SGI1R_AFFINITY_2_SHIFT) +#define ICC_SGI1R_IRQ_ROUTING_MODE_BIT 40 +#define ICC_SGI1R_RS_SHIFT 44 +#define ICC_SGI1R_RS_MASK (0xfULL << ICC_SGI1R_RS_SHIFT) +#define ICC_SGI1R_AFFINITY_3_SHIFT 48 +#define ICC_SGI1R_AFFINITY_3_MASK (0xffULL << ICC_SGI1R_AFFINITY_3_SHIFT) + +#include <asm/arch_gicv3.h> + +#ifndef __ASSEMBLY__ + +/* + * We need a value to serve as a irq-type for LPIs. Choose one that will + * hopefully pique the interest of the reviewer. + */ +#define GIC_IRQ_TYPE_LPI 0xa110c8ed + +struct rdists { + struct { + void __iomem *rd_base; + struct page *pend_page; + phys_addr_t phys_base; + bool lpi_enabled; + } __percpu *rdist; + phys_addr_t prop_table_pa; + void *prop_table_va; + u64 flags; + u32 gicd_typer; + bool has_vlpis; + bool has_direct_lpi; +}; + +struct irq_domain; +struct fwnode_handle; +int phytium_its_cpu_init(void); +#ifdef CONFIG_ASCEND_INIT_ALL_GICR +void its_set_gicr_nr(int nr); +int its_gicr_nr(void); +void its_enable_init_all_gicr(void); +bool its_init_all_gicr(void); +int its_cpu_init_others(void __iomem *base, phys_addr_t phys_base, int idx); +#endif +int phytium_its_init(struct fwnode_handle *handle, struct rdists *rdists, + struct irq_domain *domain); +int mbi_init(struct fwnode_handle *fwnode, struct irq_domain *parent); + +static inline bool gic_enable_sre(void) +{ + u32 val; + + val = gic_read_sre(); + if (val & ICC_SRE_EL1_SRE) + return true; + + val |= ICC_SRE_EL1_SRE; + gic_write_sre(val); + val = gic_read_sre(); + + return !!(val & ICC_SRE_EL1_SRE); +} + +#endif + +#endif -- 2.25.1

1 2

[PATCH openEuler-1.0-LTS] Bluetooth: use correct lock to prevent UAF of hdev object
by Yang Yingliang 15 Jun '21

15 Jun '21

From: Lin Ma <linma(a)zju.edu.cn> stable inclusion from linux-4.19.194 commit 2b9e9c2ed0f1910b5201c5d37b355b60201df415 CVE: CVE-2021-3573 -------------------------------- commit e305509e678b3a4af2b3cfd410f409f7cdaabb52 upstream. The hci_sock_dev_event() function will cleanup the hdev object for sockets even if this object may still be in used within the hci_sock_bound_ioctl() function, result in UAF vulnerability. This patch replace the BH context lock to serialize these affairs and prevent the race condition. Signed-off-by: Lin Ma <linma(a)zju.edu.cn> Signed-off-by: Marcel Holtmann <marcel(a)holtmann.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- net/bluetooth/hci_sock.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index d4e2a166ae176..78788e52a0399 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -755,7 +755,7 @@ void hci_sock_dev_event(struct hci_dev *hdev, int event) /* Detach sockets from device */ read_lock(&hci_sk_list.lock); sk_for_each(sk, &hci_sk_list.head) { - bh_lock_sock_nested(sk); + lock_sock(sk); if (hci_pi(sk)->hdev == hdev) { hci_pi(sk)->hdev = NULL; sk->sk_err = EPIPE; @@ -764,7 +764,7 @@ void hci_sock_dev_event(struct hci_dev *hdev, int event) hci_dev_put(hdev); } - bh_unlock_sock(sk); + release_sock(sk); } read_unlock(&hci_sk_list.lock); } -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS] Bluetooth: fix the erroneous flush_work() order
by Yang Yingliang 11 Jun '21

11 Jun '21

From: Lin Ma <linma(a)zju.edu.cn> stable inclusion from linux-4.19.194 commit 64700748e8a7af4883538c72ada57999d9a78e92 CVE: CVE-2021-3564 -------------------------------- commit 6a137caec23aeb9e036cdfd8a46dd8a366460e5d upstream. In the cleanup routine for failed initialization of HCI device, the flush_work(&hdev->rx_work) need to be finished before the flush_work(&hdev->cmd_work). Otherwise, the hci_rx_work() can possibly invoke new cmd_work and cause a bug, like double free, in late processings. This was assigned CVE-2021-3564. This patch reorder the flush_work() to fix this bug. Cc: Marcel Holtmann <marcel(a)holtmann.org> Cc: Johan Hedberg <johan.hedberg(a)gmail.com> Cc: Luiz Augusto von Dentz <luiz.dentz(a)gmail.com> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: Jakub Kicinski <kuba(a)kernel.org> Cc: linux-bluetooth(a)vger.kernel.org Cc: netdev(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Signed-off-by: Lin Ma <linma(a)zju.edu.cn> Signed-off-by: Hao Xiong <mart1n(a)zju.edu.cn> Cc: stable <stable(a)vger.kernel.org> Signed-off-by: Marcel Holtmann <marcel(a)holtmann.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- net/bluetooth/hci_core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index e03faca84919e..fb47fe995cefd 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -1496,8 +1496,13 @@ static int hci_dev_do_open(struct hci_dev *hdev) } else { /* Init failed, cleanup */ flush_work(&hdev->tx_work); - flush_work(&hdev->cmd_work); + + /* Since hci_rx_work() is possible to awake new cmd_work + * it should be flushed first to avoid unexpected call of + * hci_cmd_work() + */ flush_work(&hdev->rx_work); + flush_work(&hdev->cmd_work); skb_queue_purge(&hdev->cmd_q); skb_queue_purge(&hdev->rx_q); -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS] nfc: fix NULL ptr dereference in llcp_sock_getname() after failed connect
by Yang Yingliang 11 Jun '21

11 Jun '21

From: Krzysztof Kozlowski <krzysztof.kozlowski(a)canonical.com> stable inclusion from linux-4.19.194 commit 93e4ac2a9979a9a4ecc158409ed9c3044dc0ae1f CVE: CVE-2021-3587 -------------------------------- commit 4ac06a1e013cf5fdd963317ffd3b968560f33bba upstream. It's possible to trigger NULL pointer dereference by local unprivileged user, when calling getsockname() after failed bind() (e.g. the bind fails because LLCP_SAP_MAX used as SAP): BUG: kernel NULL pointer dereference, address: 0000000000000000 CPU: 1 PID: 426 Comm: llcp_sock_getna Not tainted 5.13.0-rc2-next-20210521+ #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1 04/01/2014 Call Trace: llcp_sock_getname+0xb1/0xe0 __sys_getpeername+0x95/0xc0 ? lockdep_hardirqs_on_prepare+0xd5/0x180 ? syscall_enter_from_user_mode+0x1c/0x40 __x64_sys_getpeername+0x11/0x20 do_syscall_64+0x36/0x70 entry_SYSCALL_64_after_hwframe+0x44/0xae This can be reproduced with Syzkaller C repro (bind followed by getpeername): https://syzkaller.appspot.com/x/repro.c?x=14def446e00000 Cc: <stable(a)vger.kernel.org> Fixes: d646960f7986 ("NFC: Initial LLCP support") Reported-by: syzbot+80fb126e7f7d8b1a5914(a)syzkaller.appspotmail.com Reported-by: butt3rflyh4ck <butterflyhuangxx(a)gmail.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski(a)canonical.com> Link: https://lore.kernel.org/r/20210531072138.5219-1-krzysztof.kozlowski@canonic… Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Reviewed-by: Yue Haibing <yuehaibing(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- net/nfc/llcp_sock.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c index 59de4f54dd18c..23f7116d122a2 100644 --- a/net/nfc/llcp_sock.c +++ b/net/nfc/llcp_sock.c @@ -122,6 +122,7 @@ static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) if (!llcp_sock->service_name) { nfc_llcp_local_put(llcp_sock->local); llcp_sock->local = NULL; + llcp_sock->dev = NULL; ret = -ENOMEM; goto put_dev; } @@ -131,6 +132,7 @@ static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) llcp_sock->local = NULL; kfree(llcp_sock->service_name); llcp_sock->service_name = NULL; + llcp_sock->dev = NULL; ret = -EADDRINUSE; goto put_dev; } -- 2.25.1

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[PATCH kernel-4.19 1/4] blk-iocost: fix NULL iocg deref from racing against initialization
by Yang Yingliang 11 Jun '21

11 Jun '21

From: Tejun Heo <tj(a)kernel.org> mainline inclusion from mainline-5.11-rc3 commit d16baa3f1453c14d680c5fee01cd122a22d0e0ce category: bugfix bugzilla: 47177 CVE: NA ------------------------------------------------- When initializing iocost for a queue, its rqos should be registered before the blkcg policy is activated to allow policy data initiailization to lookup the associated ioc. This unfortunately means that the rqos methods can be called on bios before iocgs are attached to all existing blkgs. While the race is theoretically possible on ioc_rqos_throttle(), it mostly happened in ioc_rqos_merge() due to the difference in how they lookup ioc. The former determines it from the passed in @rqos and then bails before dereferencing iocg if the looked up ioc is disabled, which most likely is the case if initialization is still in progress. The latter looked up ioc by dereferencing the possibly NULL iocg making it a lot more prone to actually triggering the bug. * Make ioc_rqos_merge() use the same method as ioc_rqos_throttle() to look up ioc for consistency. * Make ioc_rqos_throttle() and ioc_rqos_merge() test for NULL iocg before dereferencing it. * Explain the danger of NULL iocgs in blk_iocost_init(). Signed-off-by: Tejun Heo <tj(a)kernel.org> Reported-by: Jonathan Lemon <bsd(a)fb.com> Cc: stable(a)vger.kernel.org # v5.4+ Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Conflicts: block/blk-iocost.c Signed-off-by: Baokun Li <libaokun1(a)huawei.com> Reviewed-by: Yufen Yu <yuyufen(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- block/blk-iocost.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/block/blk-iocost.c b/block/blk-iocost.c index a3b1f1c87b0ea..92180abc43e15 100644 --- a/block/blk-iocost.c +++ b/block/blk-iocost.c @@ -1716,8 +1716,8 @@ static void ioc_rqos_throttle(struct rq_qos *rqos, struct bio *bio, iocg = blkg_to_iocg(blkg); - /* bypass IOs if disabled or for root cgroup */ - if (!ioc->enabled || !iocg->level) + /* bypass IOs if disabled, still initializing, or for root cgroup */ + if (!ioc->enabled || !iocg || !iocg->level) return; /* always activate so that even 0 cost IOs get protected to some level */ @@ -1857,8 +1857,8 @@ static void ioc_rqos_merge(struct rq_qos *rqos, struct request *rq, rcu_read_unlock(); iocg = blkg_to_iocg(blkg); - /* bypass if disabled or for root cgroup */ - if (!ioc->enabled || !iocg->level) + /* bypass if disabled, still initializing, or for root cgroup */ + if (!ioc->enabled || !iocg || !iocg->level) return; abs_cost = calc_vtime_cost(bio, iocg, true); @@ -1997,6 +1997,12 @@ static int blk_iocost_init(struct request_queue *q) ioc_refresh_params(ioc, true); spin_unlock_irq(&ioc->lock); + /* + * rqos must be added before activation to allow iocg_pd_init() to + * lookup the ioc from q. This means that the rqos methods may get + * called before policy activation completion, can't assume that the + * target bio has an iocg associated and need to test for NULL iocg. + */ rq_qos_add(q, rqos); ret = blkcg_activate_policy(q, &blkcg_policy_iocost); if (ret) { -- 2.25.1

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[PATCH kernel-4.19 00/56] backport linux-4.19.194
by Yang Yingliang 11 Jun '21

11 Jun '21

Ahelenia Ziemiańska (1): HID: multitouch: require Finger field to mark Win8 reports as MT Anand Jain (1): btrfs: fix unmountable seed device after fstrim Anant Thazhemadam (1): nl80211: validate key indexes for cfg80211_registered_device Arnd Bergmann (1): HID: i2c-hid: fix format string mismatch Björn Töpel (2): selftests/bpf: add "any alignment" annotation for some tests selftests/bpf: Avoid running unprivileged tests with alignment requirements Carlos M (1): ALSA: hda: Fix for mute key LED for HP Pavilion 15-CK0xx Daniel Borkmann (2): bpf: fix test suite to enable all unpriv program types bpf: test make sure to run unpriv test cases in test_verifier David S. Miller (4): bpf: Add BPF_F_ANY_ALIGNMENT. bpf: Adjust F_NEEDS_EFFICIENT_UNALIGNED_ACCESS handling in test_verifier.c bpf: Make more use of 'any' alignment in test_verifier.c bpf: Apply F_NEEDS_EFFICIENT_UNALIGNED_ACCESS to more ACCEPT test cases. Erik Schmauss (1): ACPI: probe ECDT before loading AML tables regardless of module-level code flag Grant Grundler (1): net: usb: cdc_ncm: don't spew notifications Greg Kroah-Hartman (1): Linux 4.19.194 Heiner Kallweit (1): efi: Allow EFI_MEMORY_XP and EFI_MEMORY_RO both to be cleared Hoang Le (2): tipc: add extack messages for bearer/media failure tipc: fix unique bearer names sanity check Ian Rogers (1): perf/cgroups: Don't rotate events for cgroups unnecessarily Jan Beulich (1): xen-pciback: redo VF placement in the virtual topology Joe Stringer (1): selftests/bpf: Generalize dummy program types Josef Bacik (4): btrfs: mark ordered extent and inode with error if we fail to finish btrfs: fix error handling in btrfs_del_csums btrfs: return errors from btrfs_del_csums in cleanup_ref_head btrfs: fixup error handling in fixup_inode_link_counts Julian Anastasov (1): ipvs: ignore IP_VS_SVC_F_HASHED flag when adding service Junxiao Bi (1): ocfs2: fix data corruption by fallocate Krzysztof Kozlowski (1): nfc: fix NULL ptr dereference in llcp_sock_getname() after failed connect Lin Ma (2): Bluetooth: fix the erroneous flush_work() order Bluetooth: use correct lock to prevent UAF of hdev object Magnus Karlsson (1): ixgbevf: add correct exception tracing for XDP Marc Zyngier (1): KVM: arm64: Fix debug register indexing Mark Rutland (1): pid: take a reference when initializing `cad_pid` Max Gurtovoy (1): vfio/platform: fix module_put call in error flow Michael Chan (1): bnxt_en: Remove the setting of dev_port. Mina Almasry (1): mm, hugetlb: fix simple resv_huge_pages underflow on UFFDIO_COPY Pablo Neira Ayuso (1): netfilter: nfnetlink_cthelper: hit EBUSY on updates if size mismatches Pavel Skripkin (4): net: caif: added cfserl_release function net: caif: add proper error handling net: caif: fix memory leak in caif_device_notify net: caif: fix memory leak in cfusbl_device_notify Phil Elwell (1): usb: dwc2: Fix build in periphal-only mode Pierre-Louis Bossart (1): ALSA: usb: update old-style static const declaration Rafael J. Wysocki (1): ACPI: EC: Look for ECDT EC after calling acpi_load_tables() Randy Dunlap (1): vfio/pci: zap_vma_ptes() needs MMU Rasmus Villemoes (1): efi: cper: fix snprintf() use in cper_dimm_err_location() Sean Christopherson (1): KVM: SVM: Truncate GPR value for DR and CR accesses in !64-bit mode Song Liu (1): perf/core: Fix corner case in perf_rotate_context() Takashi Iwai (1): ALSA: timer: Fix master timer notification Thomas Gleixner (1): x86/apic: Mark _all_ legacy interrupts when IO/APIC is missing Wei Yongjun (2): samples: vfio-mdev: fix error handing in mdpy_fb_probe() ieee802154: fix error return code in ieee802154_llsec_getparams() Zhen Lei (3): vfio/pci: Fix error return code in vfio_ecap_init() HID: pidff: fix error return code in hid_pidff_init() ieee802154: fix error return code in ieee802154_add_iface() Makefile | 2 +- arch/arm64/kvm/sys_regs.c | 42 ++-- arch/x86/include/asm/apic.h | 1 + arch/x86/kernel/apic/apic.c | 1 + arch/x86/kernel/apic/vector.c | 20 ++ arch/x86/kvm/svm.c | 8 +- drivers/acpi/bus.c | 42 ++-- drivers/firmware/efi/cper.c | 4 +- drivers/firmware/efi/memattr.c | 5 - drivers/hid/hid-multitouch.c | 10 +- drivers/hid/i2c-hid/i2c-hid-core.c | 4 +- drivers/hid/usbhid/hid-pidff.c | 1 + drivers/net/ethernet/broadcom/bnxt/bnxt.c | 1 - .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 3 + drivers/net/usb/cdc_ncm.c | 12 +- drivers/usb/dwc2/core_intr.c | 4 + drivers/vfio/pci/Kconfig | 1 + drivers/vfio/pci/vfio_pci_config.c | 2 +- drivers/vfio/platform/vfio_platform_common.c | 2 +- drivers/xen/xen-pciback/vpci.c | 14 +- fs/btrfs/extent-tree.c | 12 +- fs/btrfs/file-item.c | 10 +- fs/btrfs/inode.c | 12 + fs/btrfs/tree-log.c | 13 +- fs/ocfs2/file.c | 55 ++++- include/linux/perf_event.h | 5 + include/linux/usb/usbnet.h | 2 + include/net/caif/caif_dev.h | 2 +- include/net/caif/cfcnfg.h | 2 +- include/net/caif/cfserl.h | 1 + include/uapi/linux/bpf.h | 14 ++ init/main.c | 2 +- kernel/bpf/syscall.c | 7 +- kernel/bpf/verifier.c | 3 + kernel/events/core.c | 62 +++-- mm/hugetlb.c | 14 +- net/bluetooth/hci_core.c | 7 +- net/bluetooth/hci_sock.c | 4 +- net/caif/caif_dev.c | 13 +- net/caif/caif_usb.c | 14 +- net/caif/cfcnfg.c | 16 +- net/caif/cfserl.c | 5 + net/ieee802154/nl-mac.c | 4 +- net/ieee802154/nl-phy.c | 4 +- net/netfilter/ipvs/ip_vs_ctl.c | 2 +- net/netfilter/nfnetlink_cthelper.c | 8 +- net/nfc/llcp_sock.c | 2 + net/tipc/bearer.c | 94 +++++--- net/wireless/core.h | 2 + net/wireless/nl80211.c | 7 +- net/wireless/util.c | 39 ++- samples/vfio-mdev/mdpy-fb.c | 13 +- sound/core/timer.c | 3 +- sound/pci/hda/patch_realtek.c | 1 + sound/usb/mixer_quirks.c | 2 +- tools/include/uapi/linux/bpf.h | 14 ++ tools/lib/bpf/bpf.c | 8 +- tools/lib/bpf/bpf.h | 2 +- tools/testing/selftests/bpf/test_align.c | 4 +- tools/testing/selftests/bpf/test_verifier.c | 224 +++++++++++++----- 60 files changed, 636 insertions(+), 251 deletions(-) -- 2.25.1

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[PATCH kernel-4.19 1/4] nbd: Fix NULL pointer in flush_workqueue
by Yang Yingliang 10 Jun '21

10 Jun '21

From: Sun Ke <sunke32(a)huawei.com> mainline inclusion from mainline-v5.13-rc2 commit 79ebe9110fa458d58f1fceb078e2068d7ad37390 category: bugfix bugzilla: 27457 CVE: NA ----------------------------------------------- Open /dev/nbdX first, the config_refs will be 1 and the pointers in nbd_device are still null. Disconnect /dev/nbdX, then reference a null recv_workq. The protection by config_refs in nbd_genl_disconnect is useless. [ 656.366194] BUG: kernel NULL pointer dereference, address: 0000000000000020 [ 656.368943] #PF: supervisor write access in kernel mode [ 656.369844] #PF: error_code(0x0002) - not-present page [ 656.370717] PGD 10cc87067 P4D 10cc87067 PUD 1074b4067 PMD 0 [ 656.371693] Oops: 0002 [#1] SMP [ 656.372242] CPU: 5 PID: 7977 Comm: nbd-client Not tainted 5.11.0-rc5-00040-g76c057c84d28 #1 [ 656.373661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ 656.375904] RIP: 0010:mutex_lock+0x29/0x60 [ 656.376627] Code: 00 0f 1f 44 00 00 55 48 89 fd 48 83 05 6f d7 fe 08 01 e8 7a c3 ff ff 48 83 05 6a d7 fe 08 01 31 c0 65 48 8b 14 25 00 6d 01 00 <f0> 48 0f b1 55 d [ 656.378934] RSP: 0018:ffffc900005eb9b0 EFLAGS: 00010246 [ 656.379350] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 656.379915] RDX: ffff888104cf2600 RSI: ffffffffaae8f452 RDI: 0000000000000020 [ 656.380473] RBP: 0000000000000020 R08: 0000000000000000 R09: ffff88813bd6b318 [ 656.381039] R10: 00000000000000c7 R11: fefefefefefefeff R12: ffff888102710b40 [ 656.381599] R13: ffffc900005eb9e0 R14: ffffffffb2930680 R15: ffff88810770ef00 [ 656.382166] FS: 00007fdf117ebb40(0000) GS:ffff88813bd40000(0000) knlGS:0000000000000000 [ 656.382806] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 656.383261] CR2: 0000000000000020 CR3: 0000000100c84000 CR4: 00000000000006e0 [ 656.383819] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 656.384370] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 656.384927] Call Trace: [ 656.385111] flush_workqueue+0x92/0x6c0 [ 656.385395] nbd_disconnect_and_put+0x81/0xd0 [ 656.385716] nbd_genl_disconnect+0x125/0x2a0 [ 656.386034] genl_family_rcv_msg_doit.isra.0+0x102/0x1b0 [ 656.386422] genl_rcv_msg+0xfc/0x2b0 [ 656.386685] ? nbd_ioctl+0x490/0x490 [ 656.386954] ? genl_family_rcv_msg_doit.isra.0+0x1b0/0x1b0 [ 656.387354] netlink_rcv_skb+0x62/0x180 [ 656.387638] genl_rcv+0x34/0x60 [ 656.387874] netlink_unicast+0x26d/0x590 [ 656.388162] netlink_sendmsg+0x398/0x6c0 [ 656.388451] ? netlink_rcv_skb+0x180/0x180 [ 656.388750] ____sys_sendmsg+0x1da/0x320 [ 656.389038] ? ____sys_recvmsg+0x130/0x220 [ 656.389334] ___sys_sendmsg+0x8e/0xf0 [ 656.389605] ? ___sys_recvmsg+0xa2/0xf0 [ 656.389889] ? handle_mm_fault+0x1671/0x21d0 [ 656.390201] __sys_sendmsg+0x6d/0xe0 [ 656.390464] __x64_sys_sendmsg+0x23/0x30 [ 656.390751] do_syscall_64+0x45/0x70 [ 656.391017] entry_SYSCALL_64_after_hwframe+0x44/0xa9 To fix it, just add if (nbd->recv_workq) to nbd_disconnect_and_put(). Fixes: e9e006f5fcf2 ("nbd: fix max number of supported devs") Signed-off-by: Sun Ke <sunke32(a)huawei.com> Reviewed-by: Josef Bacik <josef(a)toxicpanda.com> Link: https://lore.kernel.org/r/20210512114331.1233964-2-sunke32@huawei.com Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Signed-off-by: Ye Bin <yebin10(a)huawei.com> Reviewed-by: Yufen Yu <yuyufen(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- drivers/block/nbd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 533ee803c79aa..55552f719b25b 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -1960,7 +1960,8 @@ static void nbd_disconnect_and_put(struct nbd_device *nbd) * config ref and try to destroy the workqueue from inside the work * queue. */ - flush_workqueue(nbd->recv_workq); + if (nbd->recv_workq) + flush_workqueue(nbd->recv_workq); if (test_and_clear_bit(NBD_RT_HAS_CONFIG_REF, &nbd->config->runtime_flags)) nbd_config_put(nbd); -- 2.25.1

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