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【Meeting Notice】openEuler kernel 技术分享第十二期 & 双周例会 Time: 2021-09-17 14:00-17:00
by Meeting Book 15 Sep '21

15 Sep '21

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[PATCH kernel-4.19] ext4: fix race writing to an inline_data file while its xattrs are changing
by Yang Yingliang 14 Sep '21

14 Sep '21

From: Theodore Ts'o <tytso(a)mit.edu> mainline inclusion from mainline-5.14 commit 9e445093e523f3277081314c864f708fd4bd34aa category: bugfix bugzilla: 180850 CVE: NA ------------------------------------------------- The location of the system.data extended attribute can change whenever xattr_sem is not taken. So we need to recalculate the i_inline_off field since it mgiht have changed between ext4_write_begin() and ext4_write_end(). This means that caching i_inline_off is probably not helpful, so in the long run we should probably get rid of it and shrink the in-memory ext4 inode slightly, but let's fix the race the simple way for now. Cc: stable(a)kernel.org Fixes: f19d5870cbf72 ("ext4: add normal write support for inline data") Reported-by: syzbot+13146364637c7363a7de(a)syzkaller.appspotmail.com Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Signed-off-by: Baokun Li <libaokun1(a)huawei.com> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- fs/ext4/inline.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index 7eeed4d50deac..3e238a2840a3b 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -750,6 +750,12 @@ int ext4_write_inline_data_end(struct inode *inode, loff_t pos, unsigned len, ext4_write_lock_xattr(inode, &no_expand); BUG_ON(!ext4_has_inline_data(inode)); + /* + * ei->i_inline_off may have changed since ext4_write_begin() + * called ext4_try_to_write_inline_data() + */ + (void) ext4_find_inline_data_nolock(inode); + kaddr = kmap_atomic(page); ext4_write_inline_data(inode, &iloc, kaddr, pos, len); kunmap_atomic(kaddr); -- 2.25.1

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[PATCH kernel-4.19] uce: pagecache reading scenario add shmem support
by Yang Yingliang 14 Sep '21

14 Sep '21

From: Tong Tiangen <tongtiangen(a)huawei.com> hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I44REB CVE: NA --------------------------- The call trace is as follows: __arch_copy_to_user+0x1bc/0x21c copy_page_to_iter+0xdc/0x328 shmem_file_read_iter+0x124/0x350 __vfs_read+0x11c/0x188 vfs_read+0x94/0x150 ksys_read+0x6c/0xd8 __arm64_sys_read+0x24/0x30 el0_svc_common+0x78/0x130 el0_svc_handler+0x38/0x78 el0_svc+0x8/0xc This patch add uce kernel recovery path support in shmem_file_read_iter(). Signed-off-by: Tong Tiangen <tongtiangen(a)huawei.com> Reviewed-by: Kefeng Wang <wangkefeng.wang(a)huawei.com> Reviewed-by: Xie XiuQi <xiexiuqi(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- mm/shmem.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/shmem.c b/mm/shmem.c index 4522348cfc189..8d32d49a4d7ba 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2674,7 +2674,14 @@ static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to) * Ok, we have the page, and it's up-to-date, so * now we can copy it to user space... */ +#ifdef CONFIG_UCE_KERNEL_RECOVERY + if (is_pagecache_reading_kernel_recovery_enable()) + ret = copy_page_to_iter_generic_read(page, offset, nr, to); + else + ret = copy_page_to_iter(page, offset, nr, to); +#else ret = copy_page_to_iter(page, offset, nr, to); +#endif retval += ret; offset += ret; index += offset >> PAGE_SHIFT; -- 2.25.1

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Re: 答复: [PATCH] 4.19: PTP_KVM support for arm/arm64
by Keqian Zhu 14 Sep '21

14 Sep '21

好的，那我们暂时把这个事情优先级调低。 On 2021/9/14 15:15, Chentao (Boby) wrote: > 我和品高黎思恒前段时间聊过，思恒反馈客户已无意愿在ARM上使用该特性，因此他们移植该特性到ARM上的意愿在降低 > > -----邮件原件----- > 发件人: zhukeqian > 发送时间: 2021年9月14日 15:11 > 收件人: lisiheng <justcaca(a)126.com> > 抄送: lisiheng(a)bingosoft.net; kernel(a)openeuler.org; Xiexiuqi <xiexiuqi(a)huawei.com>; chengjian (D) <cj.chengjian(a)huawei.com>; xingchaochao <xingchaochao(a)huawei.com>; Chentao (Boby) <boby.chen(a)huawei.com> > 主题: Re: [PATCH] 4.19: PTP_KVM support for arm/arm64 > > Hi Siheng, > > On 2021/6/1 13:41, lisiheng wrote: >> 感谢review！ >> 我重新回合！ >> > 期待你将这个高价值特性回合到openEuler社区，我们会积极检视你的补丁。感谢你对openEuler社区的贡献:)。 > > Thanks, > Keqian > >> >> >> 在 2021-06-01 11:49:34，"Keqian Zhu" <zhukeqian1(a)huawei.com> 写道： >>> Hi Siheng, >>> >>> Thanks for your patch! >>> >>> 我看到你是从原作者的kata仓库【1】回合的补丁，我发现这组补丁是比较早期的。 >>> >>> 目前社区已经正式合入了ptp_kvm arm64的特性【2】，相比这组补丁，解决了很多问题。包括： >>> 1）对热迁移的支持。 >>> 2）ptp_kvm的hyper call做了一些扩展，以区分virt_counter和phys_counter。 >>> 3）host侧使用snapshot获取时间，提高精度。 >>> 等等。 >>> >>> 考虑到特性的功能稳定性，内核的兼容性，我建议从社区主线【2】回合补丁，谢谢！ >>> >>> 【1】https://github.com/kata-containers/packaging/blob/master/kernel/pat >>> ches/4.19.x/0001-4.19-enable-ptp_kvm-for-arm64-in-kata.patch >>> 【2】https://lore.kernel.org/kvmarm/20210330145430.996981-1-maz@kernel.o >>> rg/ >>> >>> >>> BRs, >>> Keqian >>> _______________________________________________ >>> Kernel mailing list -- kernel(a)openeuler.org To unsubscribe send an >>> email to kernel-leave(a)openeuler.org >>

1 0

[PATCH] 4.19: PTP_KVM support for arm/arm64
by lisiheng 14 Sep '21

14 Sep '21

From: lisiheng <lisiheng(a)bingosoft.net> PTP_KVM is used for high precision time sync between host and guests. It relies on transferring the wall clock and counter value from the host to the guest using a KVM-specific hypercall. mainline inclusion from mainline-v4.19 category: feature bugzilla:https://gitee.com/openeuler/kernel/issues/I3R900 CVE: NA Reference: https://www.kernel.org/doc/html/latest/_sources/virt/kvm/arm/ptp_kvm.rst.txt https://github.com/kata-containers/packaging/blob/master/kernel/patches/4.1… Signed-off-by: lisiheng <lisiheng(a)bingosoft.net> --- drivers/clocksource/arm_arch_timer.c | 24 ++++++ drivers/ptp/Kconfig | 2 +- drivers/ptp/Makefile | 1 + drivers/ptp/ptp_kvm_arm64.c | 52 ++++++++++++ drivers/ptp/{ptp_kvm.c => ptp_kvm_common.c} | 89 +++++---------------- drivers/ptp/ptp_kvm_x86.c | 87 ++++++++++++++++++++ fs/jbd2/transaction.c | 17 ---- include/asm-generic/ptp_kvm.h | 12 +++ include/linux/arm-smccc.h | 5 ++ virt/kvm/arm/hypercalls.c | 14 ++++ 10 files changed, 216 insertions(+), 87 deletions(-) create mode 100644 drivers/ptp/ptp_kvm_arm64.c rename drivers/ptp/{ptp_kvm.c => ptp_kvm_common.c} (55%) create mode 100644 drivers/ptp/ptp_kvm_x86.c create mode 100644 include/asm-generic/ptp_kvm.h diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 6847a5fe13fd..f84bed34e9ea 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -1653,3 +1653,27 @@ static int __init arch_timer_acpi_init(struct acpi_table_header *table) } TIMER_ACPI_DECLARE(arch_timer, ACPI_SIG_GTDT, arch_timer_acpi_init); #endif + +#if IS_ENABLED(CONFIG_PTP_1588_CLOCK_KVM) +#include <linux/arm-smccc.h> +int kvm_arch_ptp_get_clock_fn(long *cycle, struct timespec64 *ts, + struct clocksource **cs) +{ + struct arm_smccc_res hvc_res; + + arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID, + &hvc_res); + + if ((long)(hvc_res.a0) < 0) + return -EOPNOTSUPP; + + ts->tv_sec = hvc_res.a0; + ts->tv_nsec = hvc_res.a1; + *cycle = hvc_res.a2 << 32 | hvc_res.a3; + *cs = &clocksource_counter; + + return 0; +} +EXPORT_SYMBOL_GPL(kvm_arch_ptp_get_clock_fn); +#endif + diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig index d137c480db46..318b3f5df1ea 100644 --- a/drivers/ptp/Kconfig +++ b/drivers/ptp/Kconfig @@ -109,7 +109,7 @@ config PTP_1588_CLOCK_PCH config PTP_1588_CLOCK_KVM tristate "KVM virtual PTP clock" depends on PTP_1588_CLOCK - depends on KVM_GUEST && X86 + depends on KVM_GUEST && X86 || ARM64 default y help This driver adds support for using kvm infrastructure as a PTP diff --git a/drivers/ptp/Makefile b/drivers/ptp/Makefile index 19efa9cfa950..1bf4940a88a6 100644 --- a/drivers/ptp/Makefile +++ b/drivers/ptp/Makefile @@ -4,6 +4,7 @@ # ptp-y := ptp_clock.o ptp_chardev.o ptp_sysfs.o +ptp_kvm-y := ptp_kvm_common.o ptp_kvm_$(ARCH).o obj-$(CONFIG_PTP_1588_CLOCK) += ptp.o obj-$(CONFIG_PTP_1588_CLOCK_DTE) += ptp_dte.o obj-$(CONFIG_PTP_1588_CLOCK_IXP46X) += ptp_ixp46x.o diff --git a/drivers/ptp/ptp_kvm_arm64.c b/drivers/ptp/ptp_kvm_arm64.c new file mode 100644 index 000000000000..07ee2fc2c7b1 --- /dev/null +++ b/drivers/ptp/ptp_kvm_arm64.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Virtual PTP 1588 clock for use with KVM guests + * Copyright (C) 2019 ARM Ltd. + * All Rights Reserved + */ + +#include <linux/kernel.h> +#include <linux/err.h> +#include <asm/hypervisor.h> +#include <linux/module.h> +#include <linux/psci.h> +#include <linux/arm-smccc.h> +#include <linux/timecounter.h> +#include <linux/sched/clock.h> +#include <asm/arch_timer.h> + + +int kvm_arch_ptp_init(void) +{ + struct arm_smccc_res hvc_res; + + arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID, + &hvc_res); + if ((long)(hvc_res.a0) < 0) + return -EOPNOTSUPP; + + return 0; +} + +int kvm_arch_ptp_get_clock_generic(struct timespec64 *ts, + struct arm_smccc_res *hvc_res) +{ + arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID, + hvc_res); + if ((long)(hvc_res->a0) < 0) + return -EOPNOTSUPP; + + ts->tv_sec = hvc_res->a0; + ts->tv_nsec = hvc_res->a1; + + return 0; +} + +int kvm_arch_ptp_get_clock(struct timespec64 *ts) +{ + struct arm_smccc_res hvc_res; + + kvm_arch_ptp_get_clock_generic(ts, &hvc_res); + + return 0; +} diff --git a/drivers/ptp/ptp_kvm.c b/drivers/ptp/ptp_kvm_common.c similarity index 55% rename from drivers/ptp/ptp_kvm.c rename to drivers/ptp/ptp_kvm_common.c index c67dd11e08b1..69a7cd05d188 100644 --- a/drivers/ptp/ptp_kvm.c +++ b/drivers/ptp/ptp_kvm_common.c @@ -1,29 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Virtual PTP 1588 clock for use with KVM guests * * Copyright (C) 2017 Red Hat Inc. * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * */ #include <linux/device.h> #include <linux/err.h> #include <linux/init.h> #include <linux/kernel.h> +#include <linux/slab.h> #include <linux/module.h> #include <uapi/linux/kvm_para.h> #include <asm/kvm_para.h> -#include <asm/pvclock.h> -#include <asm/kvmclock.h> -#include <uapi/asm/kvm_para.h> +#include <asm-generic/ptp_kvm.h> #include <linux/ptp_clock_kernel.h> @@ -34,56 +24,31 @@ struct kvm_ptp_clock { DEFINE_SPINLOCK(kvm_ptp_lock); -static struct pvclock_vsyscall_time_info *hv_clock; - -static struct kvm_clock_pairing clock_pair; -static phys_addr_t clock_pair_gpa; static int ptp_kvm_get_time_fn(ktime_t *device_time, struct system_counterval_t *system_counter, void *ctx) { - unsigned long ret; + unsigned long ret, cycle; struct timespec64 tspec; - unsigned version; - int cpu; - struct pvclock_vcpu_time_info *src; + struct clocksource *cs; spin_lock(&kvm_ptp_lock); preempt_disable_notrace(); - cpu = smp_processor_id(); - src = &hv_clock[cpu].pvti; - - do { - /* - * We are using a TSC value read in the hosts - * kvm_hc_clock_pairing handling. - * So any changes to tsc_to_system_mul - * and tsc_shift or any other pvclock - * data invalidate that measurement. - */ - version = pvclock_read_begin(src); - - ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, - clock_pair_gpa, - KVM_CLOCK_PAIRING_WALLCLOCK); - if (ret != 0) { - pr_err_ratelimited("clock pairing hypercall ret %lu\n", ret); - spin_unlock(&kvm_ptp_lock); - preempt_enable_notrace(); - return -EOPNOTSUPP; - } - - tspec.tv_sec = clock_pair.sec; - tspec.tv_nsec = clock_pair.nsec; - ret = __pvclock_read_cycles(src, clock_pair.tsc); - } while (pvclock_read_retry(src, version)); + + ret = kvm_arch_ptp_get_clock_fn(&cycle, &tspec, &cs); + if (ret != 0) { + pr_err_ratelimited("clock pairing hypercall ret %lu\n", ret); + spin_unlock(&kvm_ptp_lock); + preempt_enable_notrace(); + return -EOPNOTSUPP; + } preempt_enable_notrace(); - system_counter->cycles = ret; - system_counter->cs = &kvm_clock; + system_counter->cycles = cycle; + system_counter->cs = cs; *device_time = timespec64_to_ktime(tspec); @@ -126,17 +91,13 @@ static int ptp_kvm_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) spin_lock(&kvm_ptp_lock); - ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, - clock_pair_gpa, - KVM_CLOCK_PAIRING_WALLCLOCK); + ret = kvm_arch_ptp_get_clock(&tspec); if (ret != 0) { pr_err_ratelimited("clock offset hypercall ret %lu\n", ret); spin_unlock(&kvm_ptp_lock); return -EOPNOTSUPP; } - tspec.tv_sec = clock_pair.sec; - tspec.tv_nsec = clock_pair.nsec; spin_unlock(&kvm_ptp_lock); memcpy(ts, &tspec, sizeof(struct timespec64)); @@ -176,22 +137,12 @@ static void __exit ptp_kvm_exit(void) static int __init ptp_kvm_init(void) { - long ret; - - if (!kvm_para_available()) - return -ENODEV; - clock_pair_gpa = slow_virt_to_phys(&clock_pair); - hv_clock = pvclock_get_pvti_cpu0_va(); - - if (!hv_clock) - return -ENODEV; - - ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, clock_pair_gpa, - KVM_CLOCK_PAIRING_WALLCLOCK); - if (ret == -KVM_ENOSYS || ret == -KVM_EOPNOTSUPP) - return -ENODEV; + int ret; + ret = kvm_arch_ptp_init(); + if (ret) + return -EOPNOTSUPP; kvm_ptp_clock.caps = ptp_kvm_caps; kvm_ptp_clock.ptp_clock = ptp_clock_register(&kvm_ptp_clock.caps, NULL); diff --git a/drivers/ptp/ptp_kvm_x86.c b/drivers/ptp/ptp_kvm_x86.c new file mode 100644 index 000000000000..a52cf1c2990c --- /dev/null +++ b/drivers/ptp/ptp_kvm_x86.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Virtual PTP 1588 clock for use with KVM guests + * + * Copyright (C) 2017 Red Hat Inc. + */ + +#include <asm/pvclock.h> +#include <asm/kvmclock.h> +#include <linux/module.h> +#include <uapi/asm/kvm_para.h> +#include <uapi/linux/kvm_para.h> +#include <linux/ptp_clock_kernel.h> + +phys_addr_t clock_pair_gpa; +struct kvm_clock_pairing clock_pair; +struct pvclock_vsyscall_time_info *hv_clock; + +int kvm_arch_ptp_init(void) +{ + int ret; + + if (!kvm_para_available()) + return -ENODEV; + + clock_pair_gpa = slow_virt_to_phys(&clock_pair); + hv_clock = pvclock_get_pvti_cpu0_va(); + if (!hv_clock) + return -ENODEV; + + ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, clock_pair_gpa, + KVM_CLOCK_PAIRING_WALLCLOCK); + if (ret == -KVM_ENOSYS || ret == -KVM_EOPNOTSUPP) + return -ENODEV; + + return 0; +} + +int kvm_arch_ptp_get_clock(struct timespec64 *ts) +{ + long ret; + + ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, + clock_pair_gpa, + KVM_CLOCK_PAIRING_WALLCLOCK); + if (ret != 0) + return -EOPNOTSUPP; + + ts->tv_sec = clock_pair.sec; + ts->tv_nsec = clock_pair.nsec; + + return 0; +} + +int kvm_arch_ptp_get_clock_fn(unsigned long *cycle, struct timespec64 *tspec, + struct clocksource **cs) +{ + unsigned long ret; + unsigned int version; + int cpu; + struct pvclock_vcpu_time_info *src; + + cpu = smp_processor_id(); + src = &hv_clock[cpu].pvti; + + do { + /* + * We are using a TSC value read in the hosts + * kvm_hc_clock_pairing handling. + * So any changes to tsc_to_system_mul + * and tsc_shift or any other pvclock + * data invalidate that measurement. + */ + version = pvclock_read_begin(src); + + ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, + clock_pair_gpa, + KVM_CLOCK_PAIRING_WALLCLOCK); + tspec->tv_sec = clock_pair.sec; + tspec->tv_nsec = clock_pair.nsec; + *cycle = __pvclock_read_cycles(src, clock_pair.tsc); + } while (pvclock_read_retry(src, version)); + + *cs = &kvm_clock; + + return 0; +} diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index ffa6d3530f4b..4055929a043c 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -2085,7 +2085,6 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal, { struct buffer_head *head; struct buffer_head *bh; - bool has_write_io_error = false; int ret = 0; J_ASSERT(PageLocked(page)); @@ -2110,26 +2109,10 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal, jbd_unlock_bh_state(bh); if (buffer_jbd(bh)) goto busy; - - /* - * If we free a metadata buffer which has been failed to - * write out, the jbd2 checkpoint procedure will not detect - * this failure and may lead to filesystem inconsistency - * after cleanup journal tail. - */ - if (buffer_write_io_error(bh)) { - pr_err("JBD2: Error while async write back metadata bh %llu.", - (unsigned long long)bh->b_blocknr); - has_write_io_error = true; - } } while ((bh = bh->b_this_page) != head); ret = try_to_free_buffers(page); - busy: - if (has_write_io_error) - jbd2_journal_abort(journal, -EIO); - return ret; } diff --git a/include/asm-generic/ptp_kvm.h b/include/asm-generic/ptp_kvm.h new file mode 100644 index 000000000000..d87a08495710 --- /dev/null +++ b/include/asm-generic/ptp_kvm.h @@ -0,0 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/clocksource/arm_arch_timer.c + * + * Copyright (C) 2019 ARM Ltd. + * All Rights Reserved + */ + +int kvm_arch_ptp_init(void); +int kvm_arch_ptp_get_clock(struct timespec64 *ts); +int kvm_arch_ptp_get_clock_fn(unsigned long *cycle, + struct timespec64 *tspec, void *cs); diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 5b5f52ca6ac8..5a46bb6df894 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -76,6 +76,11 @@ ARM_SMCCC_SMC_32, \ 0, 1) +#define ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + 0, 2) + #define ARM_SMCCC_ARCH_WORKAROUND_1 \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ ARM_SMCCC_SMC_32, \ diff --git a/virt/kvm/arm/hypercalls.c b/virt/kvm/arm/hypercalls.c index 7a6c5f18dff2..495b25b9ed13 100644 --- a/virt/kvm/arm/hypercalls.c +++ b/virt/kvm/arm/hypercalls.c @@ -15,6 +15,9 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) u32 val = SMCCC_RET_NOT_SUPPORTED; u32 feature; gpa_t gpa; + struct timespec64 ts; + u64 cycles, cycle_high, cycle_low; + struct system_time_snapshot systime_snapshot; switch (func_id) { case ARM_SMCCC_VERSION_FUNC_ID: @@ -63,6 +66,17 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) case ARM_SMCCC_HV_PV_SCHED_KICK_CPU: val = kvm_pvsched_kick_vcpu(vcpu); break; + + case ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID: + ktime_get_real_ts64(&ts); + ktime_get_snapshot(&systime_snapshot); + cycles = systime_snapshot.cycles - vcpu_vtimer(vcpu)->cntvoff; + cycle_high = cycles >> 32; + cycle_low = cycles << 32 >> 32; + + smccc_set_retval(vcpu, ts.tv_sec, ts.tv_nsec, cycle_high, cycle_low); + return 1; + default: return kvm_psci_call(vcpu); } -- 2.23.0

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[PATCH v2 OLK-5.10 0/2] spraid: support Ramaxel raid controller
by Yanling Song 14 Sep '21

14 Sep '21

Support Ramaxel raid controller Changes since v1: - Add "OLK-5.10" to subject - Add commit header into commit message - Add CONFIG_RAMAXEL_SPRAID in defconfig Yanling Song (2): spraid: support Ramaxel raid controller Add CONFIG_RAMAXEL_SPRAID in defconfig of arch arm64 and x86 to support Ramaxel spraid controller arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + drivers/scsi/Kconfig | 1 + drivers/scsi/Makefile | 1 + drivers/scsi/spraid/Kconfig | 11 + drivers/scsi/spraid/Makefile | 7 + drivers/scsi/spraid/spraid.h | 572 +++++ drivers/scsi/spraid/spraid_main.c | 3159 ++++++++++++++++++++++++ 8 files changed, 3753 insertions(+) create mode 100644 drivers/scsi/spraid/Kconfig create mode 100644 drivers/scsi/spraid/Makefile create mode 100644 drivers/scsi/spraid/spraid.h create mode 100644 drivers/scsi/spraid/spraid_main.c -- 2.17.1

1 2

[PATCH kernel-4.19] memcg: enable accounting of ipc resources
by Yang Yingliang 14 Sep '21

14 Sep '21

From: Vasily Averin <vvs(a)virtuozzo.com> mainline inclusion from mainline-v5.15-rc1 commit 18319498fdd4cdf8c1c2c48cd432863b1f915d6f category: bugfix bugzilla: NA CVE: CVE-2021-3759 --------------------------- When user creates IPC objects it forces kernel to allocate memory for these long-living objects. It makes sense to account them to restrict the host's memory consumption from inside the memcg-limited container. This patch enables accounting for IPC shared memory segments, messages semaphores and semaphore's undo lists. Link: https://lkml.kernel.org/r/d6507b06-4df6-78f8-6c54-3ae86e3b5339@virtuozzo.com Signed-off-by: Vasily Averin <vvs(a)virtuozzo.com> Reviewed-by: Shakeel Butt <shakeelb(a)google.com> Cc: Alexander Viro <viro(a)zeniv.linux.org.uk> Cc: Alexey Dobriyan <adobriyan(a)gmail.com> Cc: Andrei Vagin <avagin(a)gmail.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: Borislav Petkov <bp(a)suse.de> Cc: Christian Brauner <christian.brauner(a)ubuntu.com> Cc: Dmitry Safonov <0x7f454c46(a)gmail.com> Cc: "Eric W. Biederman" <ebiederm(a)xmission.com> Cc: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: "J. Bruce Fields" <bfields(a)fieldses.org> Cc: Jeff Layton <jlayton(a)kernel.org> Cc: Jens Axboe <axboe(a)kernel.dk> Cc: Jiri Slaby <jirislaby(a)kernel.org> Cc: Johannes Weiner <hannes(a)cmpxchg.org> Cc: Kirill Tkhai <ktkhai(a)virtuozzo.com> Cc: Michal Hocko <mhocko(a)kernel.org> Cc: Oleg Nesterov <oleg(a)redhat.com> Cc: Roman Gushchin <guro(a)fb.com> Cc: Serge Hallyn <serge(a)hallyn.com> Cc: Tejun Heo <tj(a)kernel.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Vladimir Davydov <vdavydov.dev(a)gmail.com> Cc: Yutian Yang <nglaive(a)gmail.com> Cc: Zefan Li <lizefan.x(a)bytedance.com> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Conflicts: ipc/msg.c ipc/sem.c ipc/shm.c Signed-off-by: Li Ming <limingming.li(a)huawei.com> Reviewed-by: Kefeng Wang <wangkefeng.wang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- ipc/msg.c | 2 +- ipc/sem.c | 9 +++++---- ipc/shm.c | 2 +- 3 files changed, 7 insertions(+), 6 deletions(-) diff --git a/ipc/msg.c b/ipc/msg.c index ac4de3f672615..9a1ff5669cfbd 100644 --- a/ipc/msg.c +++ b/ipc/msg.c @@ -137,7 +137,7 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params) key_t key = params->key; int msgflg = params->flg; - msq = kvmalloc(sizeof(*msq), GFP_KERNEL); + msq = kvmalloc(sizeof(*msq), GFP_KERNEL_ACCOUNT); if (unlikely(!msq)) return -ENOMEM; diff --git a/ipc/sem.c b/ipc/sem.c index 2bf535dd0b934..171881795a302 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -494,7 +494,7 @@ static struct sem_array *sem_alloc(size_t nsems) return NULL; size = sizeof(*sma) + nsems * sizeof(sma->sems[0]); - sma = kvmalloc(size, GFP_KERNEL); + sma = kvmalloc(size, GFP_KERNEL_ACCOUNT); if (unlikely(!sma)) return NULL; @@ -1813,7 +1813,7 @@ static inline int get_undo_list(struct sem_undo_list **undo_listp) undo_list = current->sysvsem.undo_list; if (!undo_list) { - undo_list = kzalloc(sizeof(*undo_list), GFP_KERNEL); + undo_list = kzalloc(sizeof(*undo_list), GFP_KERNEL_ACCOUNT); if (undo_list == NULL) return -ENOMEM; spin_lock_init(&undo_list->lock); @@ -1897,7 +1897,7 @@ static struct sem_undo *find_alloc_undo(struct ipc_namespace *ns, int semid) rcu_read_unlock(); /* step 2: allocate new undo structure */ - new = kzalloc(sizeof(struct sem_undo) + sizeof(short)*nsems, GFP_KERNEL); + new = kzalloc(sizeof(struct sem_undo) + sizeof(short)*nsems, GFP_KERNEL_ACCOUNT); if (!new) { ipc_rcu_putref(&sma->sem_perm, sem_rcu_free); return ERR_PTR(-ENOMEM); @@ -1961,7 +1961,8 @@ static long do_semtimedop(int semid, struct sembuf __user *tsops, if (nsops > ns->sc_semopm) return -E2BIG; if (nsops > SEMOPM_FAST) { - sops = kvmalloc_array(nsops, sizeof(*sops), GFP_KERNEL); + sops = kvmalloc_array(nsops, sizeof(*sops), + GFP_KERNEL_ACCOUNT); if (sops == NULL) return -ENOMEM; } diff --git a/ipc/shm.c b/ipc/shm.c index 1c65fb357395e..904fe53256af0 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -619,7 +619,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params) ns->shm_tot + numpages > ns->shm_ctlall) return -ENOSPC; - shp = kvmalloc(sizeof(*shp), GFP_KERNEL); + shp = kvmalloc(sizeof(*shp), GFP_KERNEL_ACCOUNT); if (unlikely(!shp)) return -ENOMEM; -- 2.25.1

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[PATCH kernel-4.19] uce: pagecache reading scenario add shmem support
by Yang Yingliang 14 Sep '21

14 Sep '21

From: Tong Tiangen <tongtiangen(a)huawei.com> hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I44R9D CVE: NA --------------------------- The call trace is as follows: __arch_copy_to_user+0x1bc/0x21c copy_page_to_iter+0xdc/0x328 shmem_file_read_iter+0x124/0x350 __vfs_read+0x11c/0x188 vfs_read+0x94/0x150 ksys_read+0x6c/0xd8 __arm64_sys_read+0x24/0x30 el0_svc_common+0x78/0x130 el0_svc_handler+0x38/0x78 el0_svc+0x8/0xc This patch add uce kernel recovery path support in shmem_file_read_iter(). Signed-off-by: Tong Tiangen <tongtiangen(a)huawei.com> Reviewed-by: Kefeng Wang <wangkefeng.wang(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- mm/shmem.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index 4522348cfc189..df7bac986e5e2 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2674,7 +2674,12 @@ static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to) * Ok, we have the page, and it's up-to-date, so * now we can copy it to user space... */ - ret = copy_page_to_iter(page, offset, nr, to); +#ifdef CONFIG_UCE_KERNEL_RECOVERY + if (is_pagecache_reading_kernel_recovery_enable()) + ret = copy_page_to_iter_generic_read(page, offset, nr, to); + else + ret = copy_page_to_iter(page, offset, nr, to); +#endif retval += ret; offset += ret; index += offset >> PAGE_SHIFT; -- 2.25.1

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[PATCH kernel-4.19 1/2] crypto/sec: add aead support for user-side
by Yang Yingliang 14 Sep '21

14 Sep '21

From: Yu'an Wang <wangyuan46(a)huawei.com> driver inclusion category: Feature bugzilla: NA CVE: NA In this patch, add aead alg support for user-side alg enable. Signed-off-by: Yu'an Wang <wangyuan46(a)huawei.com> Reviewed-by: Guangwei Zhou <zhouguangwei5(a)huawei.com> Signed-off-by: Yang Yingliang <yangyingliang(a)huawei.com> --- drivers/crypto/hisilicon/sec2/sec_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/hisilicon/sec2/sec_main.c b/drivers/crypto/hisilicon/sec2/sec_main.c index e3b21ef4d0c82..deda0f679ff65 100644 --- a/drivers/crypto/hisilicon/sec2/sec_main.c +++ b/drivers/crypto/hisilicon/sec2/sec_main.c @@ -816,7 +816,7 @@ static int sec_qm_pre_init(struct hisi_qm *qm, struct pci_dev *pdev) int ret; #ifdef CONFIG_CRYPTO_QM_UACCE - qm->algs = "sec\ncipher\ndigest\n"; + qm->algs = "sec\ncipher\ndigest\naead\n"; qm->uacce_mode = uacce_mode; #endif qm->pdev = pdev; -- 2.25.1

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[PATCH kernel-4.19] Intel: PCI: Add support for Immediate Readiness
by Yang Yingliang 11 Sep '21

11 Sep '21

From: Felipe Balbi <felipe.balbi(a)linux.intel.com> mainline inclusion from mainline-v4.20-rc1 commit d6112f8def514e019658bcc9b57d53acdb71ca3f category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I47H3V CVE: NA -------------------------------- commit d6112f8def514e019658bcc9b57d53acdb71ca3f upstream. PCIe r4.0, sec 7.5.1.1.4 defines a new bit in the Status Register: Immediate Readiness – This optional bit, when Set, indicates the Function is guaranteed to be ready to successfully complete valid configuration accesses at any time following any reset that the host is capable of issuing Configuration Requests to this Function. When this bit is Set, for accesses to this Function, software is exempt from all requirements to delay configuration accesses following any type of reset, including but not limited to the timing requirements defined in Section 6.6. This means that all delays after a Conventional or Function Reset can be skipped. This patch reads such bit and caches its value in a flag inside struct pci_dev to be checked later if we should delay or can skip delays after a reset. While at that, also move the explicit msleep(100) call from pcie_flr() and pci_af_flr() to pci_dev_wait(). Signed-off-by: Felipe Balbi <felipe.balbi(a)linux.intel.com> [bhelgaas: rename PCI_STATUS_IMMEDIATE to PCI_STATUS_IMM_READY] Signed-off-by: Bjorn Helgaas <bhelgaas(a)google.com> Signed-off-by: Lin Wang <lin.x.wang(a)intel.com> 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> --- drivers/pci/pci.c | 13 ++++++++++++- include/linux/pci.h | 1 + include/uapi/linux/pci_regs.h | 1 + 3 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 9b88665347c2b..52618fb1bf64c 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1009,7 +1009,7 @@ static void __pci_start_power_transition(struct pci_dev *dev, pci_power_t state) * because have already delayed for the bridge. */ if (dev->runtime_d3cold) { - if (dev->d3cold_delay) + if (dev->d3cold_delay && !dev->imm_ready) msleep(dev->d3cold_delay); /* * When powering on a bridge from D3cold, the @@ -2756,6 +2756,7 @@ EXPORT_SYMBOL_GPL(pci_d3cold_disable); void pci_pm_init(struct pci_dev *dev) { int pm; + u16 status; u16 pmc; pm_runtime_forbid(&dev->dev); @@ -2818,6 +2819,10 @@ void pci_pm_init(struct pci_dev *dev) /* Disable the PME# generation functionality */ pci_pme_active(dev, false); } + + pci_read_config_word(dev, PCI_STATUS, &status); + if (status & PCI_STATUS_IMM_READY) + dev->imm_ready = 1; } static unsigned long pci_ea_flags(struct pci_dev *dev, u8 prop) @@ -4504,6 +4509,9 @@ int pcie_flr(struct pci_dev *dev) pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR); + if (dev->imm_ready) + return 0; + /* * Per PCIe r4.0, sec 6.6.2, a device must complete an FLR within * 100ms, but may silently discard requests while the FLR is in @@ -4545,6 +4553,9 @@ static int pci_af_flr(struct pci_dev *dev, int probe) pci_write_config_byte(dev, pos + PCI_AF_CTRL, PCI_AF_CTRL_FLR); + if (dev->imm_ready) + return 0; + /* * Per Advanced Capabilities for Conventional PCI ECN, 13 April 2006, * updated 27 July 2006; a device must complete an FLR within diff --git a/include/linux/pci.h b/include/linux/pci.h index 6e4780bd1c84d..228dfd59086d4 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -327,6 +327,7 @@ struct pci_dev { pci_power_t current_state; /* Current operating state. In ACPI, this is D0-D3, D0 being fully functional, and D3 being off. */ + unsigned int imm_ready:1; /* Supports Immediate Readiness */ u8 pm_cap; /* PM capability offset */ unsigned int pme_support:5; /* Bitmask of states from which PME# can be generated */ diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index b51b5ea5c456d..c209c4d1730ad 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -52,6 +52,7 @@ #define PCI_COMMAND_INTX_DISABLE 0x400 /* INTx Emulation Disable */ #define PCI_STATUS 0x06 /* 16 bits */ +#define PCI_STATUS_IMM_READY 0x01 /* Immediate Readiness */ #define PCI_STATUS_INTERRUPT 0x08 /* Interrupt status */ #define PCI_STATUS_CAP_LIST 0x10 /* Support Capability List */ #define PCI_STATUS_66MHZ 0x20 /* Support 66 MHz PCI 2.1 bus */ -- 2.25.1

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