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[PATCH OLK-6.6 00/10] arm64: IPI as NMI
by Liao Chen 23 Dec '23

23 Dec '23

With pseudo NMIs support available its possible to configure SGIs to be triggered as pseudo NMIs running in NMI context. And kernel features such as: - NMI backtrace can leverage IPI turned as NMI to get a backtrace of CPU stuck in hard lockup using magic SYSRQ. - kgdb relies on NMI support to round up CPUs which are stuck in hard lockup state with interrupts disabled. This patch-set adds framework to turn an IPI as NMI which can be triggered as a pseudo NMI which in turn invokes registered NMI handlers. After this patch-set we should be able to get a backtrace for a CPU stuck in HARDLOCKUP. Chen Jiahao (1): arm64: Fix the ipi backtrace warning when softlockup Li Zhengyu (1): arm64: Add non nmi ipi backtrace support Sumit Garg (7): arm64: Add framework to turn IPI as NMI irqchip/gic-v3: Enable support for SGIs to act as NMIs arm64: smp: Assign and setup an IPI as NMI nmi: backtrace: Allow runtime arch specific override arm64: ipi_nmi: Add support for NMI backtrace kgdb: Expose default CPUs roundup fallback mechanism arm64: kgdb: Roundup cpus using IPI as NMI Xiongfeng Wang (1): arm64: ipi_nmi: fix compile error when CONFIG_KGDB is disabled arch/arm/include/asm/irq.h | 2 +- arch/arm/kernel/smp.c | 3 +- arch/arm64/include/asm/irq.h | 6 ++ arch/arm64/include/asm/nmi.h | 17 +++++ arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/ipi_nmi.c | 112 +++++++++++++++++++++++++++++++ arch/arm64/kernel/kgdb.c | 18 +++++ arch/arm64/kernel/smp.c | 8 +++ arch/mips/include/asm/irq.h | 2 +- arch/mips/kernel/process.c | 3 +- arch/powerpc/include/asm/irq.h | 2 +- arch/powerpc/kernel/stacktrace.c | 3 +- arch/sparc/include/asm/irq_64.h | 2 +- arch/sparc/kernel/process_64.c | 4 +- arch/x86/include/asm/irq.h | 2 +- arch/x86/kernel/apic/hw_nmi.c | 3 +- drivers/irqchip/irq-gic-v3.c | 29 +++++--- include/linux/kgdb.h | 12 ++++ include/linux/nmi.h | 12 ++-- kernel/debug/debug_core.c | 8 ++- 20 files changed, 222 insertions(+), 28 deletions(-) create mode 100644 arch/arm64/include/asm/nmi.h create mode 100644 arch/arm64/kernel/ipi_nmi.c -- 2.34.1

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[PATCH OLK-6.6 0/1] arm64: ipi_nmi: fix compile error when CONFIG_KGDB is disabled
by Liao Chen 23 Dec '23

23 Dec '23

arch/arm64/kernel/ipi_nmi.c: In function ¡®ipi_nmi_handler¡¯: arch/arm64/kernel/ipi_nmi.c:54:7: error: implicit declaration of function ¡®kgdb_nmicallback¡¯ [-Werror=implicit-function-declaration] if (!kgdb_nmicallback(cpu, get_irq_regs())) ^~~~~~~~~~~~~~~~ kgbd_nmicallback is only defined when CONFIG_KGDB is set up. Use macro to warp CONFIG_KGDB to address the issue. Xiongfeng Wang (1): arm64: ipi_nmi: fix compile error when CONFIG_KGDB is disabled arch/arm64/kernel/ipi_nmi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) -- 2.34.1

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[PATCH openEuler-1.0-LTS] ipv4: Fix device used for dst_alloc with local routes
by Ziyang Xuan 23 Dec '23

23 Dec '23

From: David Ahern <dsahern(a)kernel.org> mainline inclusion from mainline-v5.13-rc7 commit b87b04f5019e821c8c6c7761f258402e43500a1f category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8KNM7 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Oliver reported a use case where deleting a VRF device can hang waiting for the refcnt to drop to 0. The root cause is that the dst is allocated against the VRF device but cached on the loopback device. The use case (added to the selftests) has an implicit VRF crossing due to the ordering of the FIB rules (lookup local is before the l3mdev rule, but the problem occurs even if the FIB rules are re-ordered with local after l3mdev because the VRF table does not have a default route to terminate the lookup). The end result is is that the FIB lookup returns the loopback device as the nexthop, but the ingress device is in a VRF. The mismatch causes the dst alloc against the VRF device but then cached on the loopback. The fix is to bring the trick used for IPv6 (see ip6_rt_get_dev_rcu): pick the dst alloc device based the fib lookup result but with checks that the result has a nexthop device (e.g., not an unreachable or prohibit entry). Fixes: f5a0aab84b74 ("net: ipv4: dst for local input routes should use l3mdev if relevant") Reported-by: Oliver Herms <oliver.peter.herms(a)gmail.com> Signed-off-by: David Ahern <dsahern(a)kernel.org> Signed-off-by: David S. Miller <davem(a)davemloft.net> Conflicts: net/ipv4/route.c Signed-off-by: Ziyang Xuan <william.xuanziyang(a)huawei.com> --- net/ipv4/route.c | 15 +++++++++++++- tools/testing/selftests/net/fib_tests.sh | 25 ++++++++++++++++++++++++ 2 files changed, 39 insertions(+), 1 deletion(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 86096e2e43b0..e2408efb6ddf 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1962,6 +1962,19 @@ static int ip_mkroute_input(struct sk_buff *skb, return __mkroute_input(skb, res, in_dev, daddr, saddr, tos); } +/* get device for dst_alloc with local routes */ +static struct net_device *ip_rt_get_dev(struct net *net, + const struct fib_result *res) +{ + struct fib_nh_common *nhc = res->fi ? res->nhc : NULL; + struct net_device *dev = NULL; + + if (nhc) + dev = l3mdev_master_dev_rcu(nhc->nhc_dev); + + return dev ? : net->loopback_dev; +} + /* * NOTE. We drop all the packets that has local source * addresses, because every properly looped back packet @@ -2113,7 +2126,7 @@ out: return err; } } - rth = rt_dst_alloc(l3mdev_master_dev_rcu(dev) ? : net->loopback_dev, + rth = rt_dst_alloc(ip_rt_get_dev(net, res), flags | RTCF_LOCAL, res->type, IN_DEV_CONF_GET(in_dev, NOPOLICY), false, do_cache); if (!rth) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index 7d1a7c0dc56a..c9800635eea6 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -1221,12 +1221,37 @@ ipv4_rt_replace() ipv4_rt_replace_mpath } +# checks that cached input route on VRF port is deleted +# when VRF is deleted +ipv4_local_rt_cache() +{ + run_cmd "ip addr add 10.0.0.1/32 dev lo" + run_cmd "ip netns add test-ns" + run_cmd "ip link add veth-outside type veth peer name veth-inside" + run_cmd "ip link add vrf-100 type vrf table 1100" + run_cmd "ip link set veth-outside master vrf-100" + run_cmd "ip link set veth-inside netns test-ns" + run_cmd "ip link set veth-outside up" + run_cmd "ip link set vrf-100 up" + run_cmd "ip route add 10.1.1.1/32 dev veth-outside table 1100" + run_cmd "ip netns exec test-ns ip link set veth-inside up" + run_cmd "ip netns exec test-ns ip addr add 10.1.1.1/32 dev veth-inside" + run_cmd "ip netns exec test-ns ip route add 10.0.0.1/32 dev veth-inside" + run_cmd "ip netns exec test-ns ip route add default via 10.0.0.1" + run_cmd "ip netns exec test-ns ping 10.0.0.1 -c 1 -i 1" + run_cmd "ip link delete vrf-100" + + # if we do not hang test is a success + log_test $? 0 "Cached route removed from VRF port device" +} + ipv4_route_test() { route_setup ipv4_rt_add ipv4_rt_replace + ipv4_local_rt_cache route_cleanup } -- 2.25.1

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[PATCH OLK-5.10 0/2] net: Backport bugfixes from mainline
by Ziyang Xuan 23 Dec '23

23 Dec '23

Backport bugfixes from mainline. Muchun Song (1): tcp: use alloc_large_system_hash() to allocate table_perturb Paolo Abeni (1): udp: skip L4 aggregation for UDP tunnel packets net/ipv4/inet_hashtables.c | 10 ++++++---- net/ipv4/udp_offload.c | 17 ++++++++++------- 2 files changed, 16 insertions(+), 11 deletions(-) -- 2.25.1

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[PATCH OLK-5.10 0/2] fs: mitigatin cacheline false sharing in struct file
by Xie XiuQi 23 Dec '23

23 Dec '23

The cache false-sharing exists in the struct file, for syscall test case of Unixbench. In a system with a 128B cacheline size, we force set it to 64B alignment to get a better performance. If we use alignment, it would waste ~192 bytes at worst case for each file struct. If unsure, say N. Xie XiuQi (2): fs: mitigatin cacheline false sharing in struct file fs: enable CONFIG_FILE_MITIGATION_FALSE_SHARING by default on arm64 arch/arm64/configs/openeuler_defconfig | 1 + fs/Kconfig | 13 +++++++++ fs/file_table.c | 37 +++++++++++++++++++++++--- 3 files changed, 48 insertions(+), 3 deletions(-) -- 2.20.1

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[PATCH OLK-6.6 0/4] Fix smmu pgtable prfetch and add support for ras features
by Zhang Zekun 23 Dec '23

23 Dec '23

Fix the pgtable prefetch problem, besides add some ras features which is used in ascend scenarios. Zhang Zekun (4): iommu/arm-smmu-v3: Add a SYNC command to avoid broken page table prefetch mm: memory-failure: Directly return the task for specific use ACPI: APEI: Don't call notifier again in ts senario mm/hwpoison: Add to check is a page is hwpoisoned arch/arm64/Kconfig | 13 +++++++++ arch/arm64/configs/openeuler_defconfig | 1 + arch/arm64/kernel/cpu_errata.c | 14 +++++++++ arch/arm64/tools/cpucaps | 1 + drivers/acpi/apei/ghes.c | 3 ++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 20 +++++++++++++ include/linux/mm.h | 5 ++++ mm/Kconfig | 9 ++++++ mm/memory-failure.c | 32 +++++++++++++++++++++ 9 files changed, 98 insertions(+) -- 2.17.1

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[PATCH OLK-6.6 0/4] Add L3T and LPDDRC PMU
by Chen Jun 23 Dec '23

23 Dec '23

From: c00424029 <c00424029(a)huawei.com> Chen Jun (4): perf: hisi: Make irq shared perf: hisi: Fix read sccl_id and ccl_id error in some platform perf: hisi: Add support for HiSilicon SoC L3T PMU perf: hisi: Add support for HiSilicon SoC LPDDRC PMU arch/arm64/configs/openeuler_defconfig | 2 + drivers/perf/hisilicon/Kconfig | 18 + drivers/perf/hisilicon/Makefile | 2 + drivers/perf/hisilicon/hisi_uncore_l3t_pmu.c | 403 +++++++++++++++++ .../perf/hisilicon/hisi_uncore_lpddrc_pmu.c | 408 ++++++++++++++++++ drivers/perf/hisilicon/hisi_uncore_pmu.c | 21 +- 6 files changed, 847 insertions(+), 7 deletions(-) create mode 100644 drivers/perf/hisilicon/hisi_uncore_l3t_pmu.c create mode 100644 drivers/perf/hisilicon/hisi_uncore_lpddrc_pmu.c -- 2.17.1

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[PATCH OLK-6.6 0/3] files cgroup:merged patch
by chenridong 23 Dec '23

23 Dec '23

Binder Makin (1): cgroups: Resource controller for open files Lu Jialin (1): enable CONFIG_CGROUP_FILES in openeuler_defconfig for x86 and arm64 Yang Yingliang (1): cgroup/files: support boot parameter to control if disable files cgroup .../admin-guide/kernel-parameters.txt | 7 +- arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + fs/Makefile | 1 + fs/file.c | 68 +++- fs/filescontrol.c | 312 ++++++++++++++++++ include/linux/cgroup-defs.h | 8 +- include/linux/cgroup_subsys.h | 4 + include/linux/fdtable.h | 1 + include/linux/filescontrol.h | 40 +++ init/Kconfig | 10 + 11 files changed, 445 insertions(+), 8 deletions(-) create mode 100644 fs/filescontrol.c create mode 100644 include/linux/filescontrol.h -- 2.34.1

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[PATCH OLK-6.6 0/4] Fix smmu pgtable prfetch and add support
by Zhang Zekun 23 Dec '23

23 Dec '23

Fix the pgtable prefetch problem, besides add some ras features which is used in ascend scenarios. Zhang Zekun (4): iommu/arm-smmu-v3: Add a SYNC command to avoid broken page table prefetch mm: memory-failure: Directly return the task for specific use ACPI: APEI: Don't call notifier again in ts senario mm/hwpoison: Add to check is a page is hwpoisoned arch/arm64/Kconfig | 13 +++++++++ arch/arm64/configs/openeuler_defconfig | 1 + arch/arm64/kernel/cpu_errata.c | 14 +++++++++ arch/arm64/tools/cpucaps | 1 + drivers/acpi/apei/ghes.c | 3 ++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 20 +++++++++++++ include/linux/mm.h | 5 ++++ mm/Kconfig | 9 ++++++ mm/memory-failure.c | 32 +++++++++++++++++++++ 9 files changed, 98 insertions(+) -- 2.17.1

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[PATCH OLK-6.6 00/33] Support kernel livepatching
by Zheng Yejian 23 Dec '23

23 Dec '23

Zheng Yejian (33): livepatch/core: Allow implementation without ftrace livepatch/core: Reuse common codes in the solution without ftrace Revert "x86/insn: Make insn_complete() static" livepatch/x86: Support livepatch without ftrace livepatch/core: Disable support for replacing livepatch/core: Restrict livepatch patched/unpatched when plant kprobe livepatch/core: Support load and unload hooks livepatch: samples: Adapt livepatch-sample for solution without ftrace livepatch/core: Support jump_label livepatch: Fix crash when access the global variable in hook livepatch: Fix patching functions which have static_call livepatch/core: Avoid conflict with static {call,key} livepatch/arm64: Support livepatch without ftrace livepatch/core: Revert module_enable_ro and module_disable_ro livepatch: Enable livepatch configs in openeuler_defconfig arm/module: Use plt section indices for relocations livepatch/core: Add support for arm for klp relocation livepatch/arm: Support livepatch without ftrace livepatch/ppc32: Support livepatch without ftrace livepatch: Use breakpoint exception to optimize enabling livepatch livepatch/x86: Support breakpoint exception optimization livepatch: Add arch_klp_init livepatch/arm64: Support breakpoint exception optimization livepatch/arm: Support breakpoint exception optimization livepatch: Add klp_module_delete_safety_check livepatch/x86: Add arch_klp_module_check_calltrace livepatch/arm64: Add arch_klp_module_check_calltrace livepatch/arm: Add arch_klp_module_check_calltrace livepatch: Bypass dead thread when check calltrace livepatch/ppc64: Implement livepatch without ftrace for ppc64be livepatch/ppc64: Sample testcase fix ppc64 livepatch/powerpc: Support breakpoint exception optimization livepatch/powerpc: Add arch_klp_module_check_calltrace Documentation/filesystems/proc.rst | 2 +- arch/arm/Kconfig | 3 + arch/arm/include/asm/livepatch.h | 61 + arch/arm/include/asm/module.h | 4 +- arch/arm/kernel/Makefile | 1 + arch/arm/kernel/ftrace.c | 4 +- arch/arm/kernel/livepatch.c | 322 ++++ arch/arm/kernel/module-plts.c | 22 +- arch/arm/kernel/module.c | 4 +- arch/arm64/Kconfig | 3 + arch/arm64/configs/openeuler_defconfig | 12 + arch/arm64/include/asm/brk-imm.h | 1 + arch/arm64/include/asm/debug-monitors.h | 2 + arch/arm64/include/asm/livepatch.h | 56 + arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/livepatch.c | 290 ++++ arch/powerpc/Kconfig | 5 +- arch/powerpc/include/asm/livepatch.h | 80 + arch/powerpc/include/asm/module.h | 3 + arch/powerpc/kernel/Makefile | 2 + arch/powerpc/kernel/livepatch.c | 357 +++++ arch/powerpc/kernel/livepatch_32.c | 124 ++ arch/powerpc/kernel/livepatch_64.c | 264 ++++ arch/powerpc/kernel/livepatch_tramp.S | 126 ++ arch/powerpc/kernel/module_64.c | 109 ++ arch/powerpc/kernel/traps.c | 8 + arch/s390/Kconfig | 2 +- arch/s390/configs/debug_defconfig | 1 + arch/s390/configs/defconfig | 1 + arch/x86/Kconfig | 3 +- arch/x86/configs/openeuler_defconfig | 12 +- arch/x86/include/asm/insn.h | 7 + arch/x86/include/asm/livepatch.h | 43 + arch/x86/kernel/Makefile | 1 + arch/x86/kernel/livepatch.c | 376 +++++ arch/x86/kernel/module.c | 2 +- arch/x86/kernel/traps.c | 10 + arch/x86/lib/insn.c | 7 - include/linux/jump_label.h | 10 + include/linux/livepatch.h | 129 +- include/linux/livepatch_sched.h | 6 +- include/linux/module.h | 33 + include/linux/moduleloader.h | 4 +- include/linux/static_call.h | 6 + kernel/jump_label.c | 22 + kernel/livepatch/Kconfig | 78 +- kernel/livepatch/Makefile | 3 +- kernel/livepatch/core.c | 1563 +++++++++++++++++++- kernel/livepatch/core.h | 16 + kernel/module/main.c | 16 +- kernel/module/strict_rwx.c | 17 + kernel/static_call_inline.c | 20 + lib/Kconfig.debug | 2 +- samples/livepatch/Makefile | 2 + samples/livepatch/livepatch-sample.c | 47 + tools/arch/x86/include/asm/insn.h | 7 + tools/arch/x86/lib/insn.c | 7 - tools/testing/selftests/bpf/config.aarch64 | 1 + tools/testing/selftests/bpf/config.s390x | 1 + tools/testing/selftests/livepatch/README | 1 + tools/testing/selftests/livepatch/config | 1 + 61 files changed, 4266 insertions(+), 57 deletions(-) create mode 100644 arch/arm/include/asm/livepatch.h create mode 100644 arch/arm/kernel/livepatch.c create mode 100644 arch/arm64/include/asm/livepatch.h create mode 100644 arch/arm64/kernel/livepatch.c create mode 100644 arch/powerpc/kernel/livepatch.c create mode 100644 arch/powerpc/kernel/livepatch_32.c create mode 100644 arch/powerpc/kernel/livepatch_64.c create mode 100644 arch/powerpc/kernel/livepatch_tramp.S create mode 100644 arch/x86/include/asm/livepatch.h create mode 100644 arch/x86/kernel/livepatch.c -- 2.25.1

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