euleros inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4O31I?from=project-issue CVE: NA

The reserve memory of PMEM conflicts with "add memmap interface to reserved memory for mremap syscall usage", need to rollback, resubmit after adaptation.

Feature related commit： 1.PMEM function commit:94dc364f5eda10f49449ba573dc3322e1ea92280 2.PMEM feature config commit: 36d7a831e15ceb84e937122c87d01c14242dc377

Signed-off-by: Zhuling zhuling8@huawei.com --- arch/arm64/Kconfig | 21 -------- arch/arm64/configs/openeuler_defconfig | 3 -- arch/arm64/kernel/Makefile | 1 - arch/arm64/kernel/pmem.c | 35 ------------- arch/arm64/kernel/setup.c | 10 ---- arch/arm64/mm/init.c | 94 ---------------------------------- drivers/nvdimm/Kconfig | 5 -- drivers/nvdimm/Makefile | 1 - 8 files changed, 170 deletions(-) delete mode 100644 arch/arm64/kernel/pmem.c

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index df90a6e..2df4b31 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1321,27 +1321,6 @@ config RODATA_FULL_DEFAULT_ENABLED This requires the linear region to be mapped down to pages, which may adversely affect performance in some cases.

-config ARM64_PMEM_RESERVE - bool "Reserve memory for persistent storage" - default n - help - Use memmap=nn[KMG]!ss[KMG](memmap=100K!0x1a0000000) reserve - memory for persistent storage. - - Say y here to enable this feature. - -config ARM64_PMEM_LEGACY_DEVICE - bool "Create persistent storage" - depends on BLK_DEV - depends on LIBNVDIMM - select ARM64_PMEM_RESERVE - help - Use reserved memory for persistent storage when the kernel - restart or update. the data in PMEM will not be lost and - can be loaded faster. - - Say y if unsure. - config ARM64_SW_TTBR0_PAN bool "Emulate Privileged Access Never using TTBR0_EL1 switching" help diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig index 17bc875..b5fc851 100644 --- a/arch/arm64/configs/openeuler_defconfig +++ b/arch/arm64/configs/openeuler_defconfig @@ -416,8 +416,6 @@ CONFIG_ARM64_CPU_PARK=y CONFIG_FORCE_MAX_ZONEORDER=11 CONFIG_UNMAP_KERNEL_AT_EL0=y CONFIG_RODATA_FULL_DEFAULT_ENABLED=y -CONFIG_ARM64_PMEM_RESERVE=y -CONFIG_ARM64_PMEM_LEGACY_DEVICE=y # CONFIG_ARM64_SW_TTBR0_PAN is not set CONFIG_ARM64_TAGGED_ADDR_ABI=y CONFIG_ARM64_ILP32=y @@ -6026,7 +6024,6 @@ CONFIG_ND_BTT=m CONFIG_BTT=y CONFIG_OF_PMEM=m CONFIG_NVDIMM_KEYS=y -CONFIG_PMEM_LEGACY=m CONFIG_DAX_DRIVER=y CONFIG_DAX=y CONFIG_DEV_DAX=m diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index f615325..169d90f 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -68,7 +68,6 @@ obj-$(CONFIG_ARM64_PTR_AUTH) += pointer_auth.o obj-$(CONFIG_SHADOW_CALL_STACK) += scs.o obj-$(CONFIG_ARM64_MTE) += mte.o obj-$(CONFIG_MPAM) += mpam/ -obj-$(CONFIG_ARM64_PMEM_LEGACY_DEVICE) += pmem.o

obj-y += vdso/ probes/ obj-$(CONFIG_COMPAT_VDSO) += vdso32/ diff --git a/arch/arm64/kernel/pmem.c b/arch/arm64/kernel/pmem.c deleted file mode 100644 index 16eaf70..0000000 --- a/arch/arm64/kernel/pmem.c +++ /dev/null @@ -1,35 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright(c) 2021 Huawei Technologies Co., Ltd - * - * Derived from x86 and arm64 implement PMEM. - */ -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/module.h> - -static int found(struct resource *res, void *data) -{ - return 1; -} - -static int __init register_e820_pmem(void) -{ - struct platform_device *pdev; - int rc; - - rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY, - IORESOURCE_MEM, 0, -1, NULL, found); - if (rc <= 0) - return 0; - - /* - * See drivers/nvdimm/e820.c for the implementation, this is - * simply here to trigger the module to load on demand. - */ - pdev = platform_device_alloc("e820_pmem", -1); - - return platform_device_add(pdev); -} -device_initcall(register_e820_pmem); diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 88ec495..7cd0425 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -70,10 +70,6 @@ static int __init arm64_enable_cpu0_hotplug(char *str) __setup("arm64_cpu0_hotplug", arm64_enable_cpu0_hotplug); #endif

-#ifdef CONFIG_ARM64_PMEM_RESERVE -extern struct resource pmem_res; -#endif - phys_addr_t __fdt_pointer __initdata;

/* @@ -288,12 +284,6 @@ static void __init request_standard_resources(void) request_resource(res, &pin_memory_resource); #endif } - -#ifdef CONFIG_ARM64_PMEM_RESERVE - if (pmem_res.end && pmem_res.start) - request_resource(&iomem_resource, &pmem_res); -#endif - }

static int __init reserve_memblock_reserved_regions(void) diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 3b9401e..e8d4461 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -55,7 +55,6 @@ */ s64 memstart_addr __ro_after_init = -1; EXPORT_SYMBOL(memstart_addr); -phys_addr_t start_at, mem_size;

#ifdef CONFIG_PIN_MEMORY struct resource pin_memory_resource = { @@ -112,18 +111,6 @@ static void __init reserve_pin_memory_res(void) */ phys_addr_t arm64_dma_phys_limit __ro_after_init;

-static unsigned long long pmem_size, pmem_start; - -#ifdef CONFIG_ARM64_PMEM_RESERVE -struct resource pmem_res = { - .name = "Persistent Memory (legacy)", - .start = 0, - .end = 0, - .flags = IORESOURCE_MEM, - .desc = IORES_DESC_PERSISTENT_MEMORY_LEGACY -}; -#endif - #ifndef CONFIG_KEXEC_CORE static void __init reserve_crashkernel(void) { @@ -417,83 +404,6 @@ static int __init reserve_park_mem(void) } #endif

-static bool __init is_mem_valid(unsigned long long mem_size, unsigned long long mem_start) -{ - if (!memblock_is_region_memory(mem_start, mem_size)) { - pr_warn("cannot reserve mem: region is not memory!\n"); - return false; - } - - if (memblock_is_region_reserved(mem_start, mem_size)) { - pr_warn("cannot reserve mem: region overlaps reserved memory!\n"); - return false; - } - - if (!IS_ALIGNED(mem_start, SZ_2M)) { - pr_warn("cannot reserve mem: base address is not 2MB aligned!\n"); - return false; - } - - return true; -} - -static int __init parse_memmap_one(char *p) -{ - char *oldp; - - if (!p) - return -EINVAL; - - oldp = p; - mem_size = memparse(p, &p); - if (p == oldp) - return -EINVAL; - - if (!mem_size) - return -EINVAL; - - mem_size = PAGE_ALIGN(mem_size); - - if (*p == '!') { - start_at = memparse(p+1, &p); - - pmem_start = start_at; - pmem_size = mem_size; - } else - pr_info("Unrecognized memmap option, please check the parameter.\n"); - - return *p == '\0' ? 0 : -EINVAL; -} - -static int __init parse_memmap_opt(char *str) -{ - while (str) { - char *k = strchr(str, ','); - - if (k) - *k++ = 0; - parse_memmap_one(str); - str = k; - } - - return 0; -} -early_param("memmap", parse_memmap_opt); - -#ifdef CONFIG_ARM64_PMEM_RESERVE -static void __init reserve_pmem(void) -{ - if (!is_mem_valid(mem_size, start_at)) - return; - - memblock_remove(pmem_start, pmem_size); - pr_info("pmem reserved: 0x%016llx - 0x%016llx (%lld MB)\n", - pmem_start, pmem_start + pmem_size, pmem_size >> 20); - pmem_res.start = pmem_start; - pmem_res.end = pmem_start + pmem_size - 1; -} -#endif - void __init arm64_memblock_init(void) { const s64 linear_region_size = BIT(vabits_actual - 1); @@ -668,10 +578,6 @@ void __init bootmem_init(void) reserve_quick_kexec(); #endif

-#ifdef CONFIG_ARM64_PMEM_RESERVE - reserve_pmem(); -#endif - reserve_pin_memory_res();

memblock_dump_all(); diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig index ce4de75..b7d1eb3 100644 --- a/drivers/nvdimm/Kconfig +++ b/drivers/nvdimm/Kconfig @@ -132,8 +132,3 @@ config NVDIMM_TEST_BUILD infrastructure.

endif - -config PMEM_LEGACY - tristate "Pmem_legacy" - select X86_PMEM_LEGACY if X86 - select ARM64_PMEM_LEGACY_DEVICE if ARM64 diff --git a/drivers/nvdimm/Makefile b/drivers/nvdimm/Makefile index 6f8dc92..0407753 100644 --- a/drivers/nvdimm/Makefile +++ b/drivers/nvdimm/Makefile @@ -3,7 +3,6 @@ obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o obj-$(CONFIG_BLK_DEV_PMEM) += nd_pmem.o obj-$(CONFIG_ND_BTT) += nd_btt.o obj-$(CONFIG_ND_BLK) += nd_blk.o -obj-$(CONFIG_PMEM_LEGACY) += nd_e820.o obj-$(CONFIG_OF_PMEM) += of_pmem.o obj-$(CONFIG_VIRTIO_PMEM) += virtio_pmem.o nd_virtio.o