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[PATCH v6 0/3] Add Intel VT-d nested translation (part 2/2)

by Yi Liu

This is the second part to add Intel VT-d nested translation based on IOMMUFD nesting infrastructure. As the iommufd nesting infrastructure series [1], iommu core supports new ops to invalidate the cache after the modifictions in stage-1 page table. So far, the cache invalidation data is vendor specific, the data_type (IOMMU_HWPT_DATA_VTD_S1) defined for the vendor specific HWPT allocation is reused in the cache invalidation path. User should provide the correct data_type that suit with the type used in HWPT allocation. IOMMU_HWPT_INVALIDATE iotcl returns an error in @out_driver_error_code. However Intel VT-d does not define error code so far, so it's not easy to pre-define it in iommufd neither. As a result, this field should just be ignored on VT-d platform. Complete code can be found in [2], corresponding QEMU could can be found in [3]. [1] https://lore.kernel.org/linux-iommu/20231020092426.13907-1-yi.l.liu@intel.c… [2] https://github.com/yiliu1765/iommufd/tree/iommufd_nesting [3] https://github.com/yiliu1765/qemu/tree/zhenzhong/wip/iommufd_nesting_rfcv1 Change log: v6: - Address comments from Kevin - Split the VT-d nesting series into two parts (Jason) v5: https://lore.kernel.org/linux-iommu/20230921075431.125239-1-yi.l.liu@intel.… - Add Kevin's r-b for patch 2, 3 ,5 8, 10 - Drop enforce_cache_coherency callback from the nested type domain ops (Kevin) - Remove duplicate agaw check in patch 04 (Kevin) - Remove duplicate domain_update_iommu_cap() in patch 06 (Kevin) - Check parent's force_snooping to set pgsnp in the pasid entry (Kevin) - uapi data structure check (Kevin) - Simplify the errata handling as user can allocate nested parent domain v4: https://lore.kernel.org/linux-iommu/20230724111335.107427-1-yi.l.liu@intel.… - Remove ascii art tables (Jason) - Drop EMT (Tina, Jason) - Drop MTS and related definitions (Kevin) - Rename macro IOMMU_VTD_PGTBL_ to IOMMU_VTD_S1_ (Kevin) - Rename struct iommu_hwpt_intel_vtd_ to iommu_hwpt_vtd_ (Kevin) - Rename struct iommu_hwpt_intel_vtd to iommu_hwpt_vtd_s1 (Kevin) - Put the vendor specific hwpt alloc data structure before enuma iommu_hwpt_type (Kevin) - Do not trim the higher page levels of S2 domain in nested domain attachment as the S2 domain may have been used independently. (Kevin) - Remove the first-stage pgd check against the maximum address of s2_domain as hw can check it anyhow. It makes sense to check every pfns used in the stage-1 page table. But it cannot make it. So just leave it to hw. (Kevin) - Split the iotlb flush part into an order of uapi, helper and callback implementation (Kevin) - Change the policy of VT-d nesting errata, disallow RO mapping once a domain is used as parent domain of a nested domain. This removes the nested_users counting. (Kevin) - Minor fix for "make htmldocs" v3: https://lore.kernel.org/linux-iommu/20230511145110.27707-1-yi.l.liu@intel.c… - Further split the patches into an order of adding helpers for nested domain, iotlb flush, nested domain attachment and nested domain allocation callback, then report the hw_info to userspace. - Add batch support in cache invalidation from userspace - Disallow nested translation usage if RO mappings exists in stage-2 domain due to errata on readonly mappings on Sapphire Rapids platform. v2: https://lore.kernel.org/linux-iommu/20230309082207.612346-1-yi.l.liu@intel.… - The iommufd infrastructure is split to be separate series. v1: https://lore.kernel.org/linux-iommu/20230209043153.14964-1-yi.l.liu@intel.c… Regards, Yi Liu Yi Liu (3): iommufd: Add data structure for Intel VT-d stage-1 cache invalidation iommu/vt-d: Make iotlb flush helpers to be extern iommu/vt-d: Add iotlb flush for nested domain drivers/iommu/intel/iommu.c | 10 +++---- drivers/iommu/intel/iommu.h | 6 ++++ drivers/iommu/intel/nested.c | 54 ++++++++++++++++++++++++++++++++++++ include/uapi/linux/iommufd.h | 36 ++++++++++++++++++++++++ 4 files changed, 101 insertions(+), 5 deletions(-) -- 2.34.1

1 year, 10 months

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[GIT PULL] Kselftest fixes update for Linux 6.6-rc7

by Shuah Khan

Hi Linus, Please pull the following Kselftest fixes update for Linux 6.6-rc7. This Kselftest update for Linux 6.6-rc7 consists of one single fix to assert check in user_events abi_test to properly check bit value on Big Endian architectures. The current code treats the bit values as Little Endian and the check fails on Big Endian. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit 6f874fa021dfc7bf37f4f37da3a5aaa41fe9c39c: selftests: Fix wrong TARGET in kselftest top level Makefile (2023-09-26 18:47:37 -0600) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux_kselftest_active-fixes-6.6-rc7 for you to fetch changes up to cf5a103c98a6fb9ee3164334cb5502df6360749b: selftests/user_events: Fix abi_test for BE archs (2023-10-17 15:07:19 -0600) ---------------------------------------------------------------- linux_kselftest_active-fixes-6.6-rc7 This Kselftest update for Linux 6.6-rc7 consists of one single fix to assert check in user_events abi_test to properly check bit value on Big Endian architectures. The current code treats the bit values as Little Endian and the check fails on Big Endian. ---------------------------------------------------------------- Beau Belgrave (1): selftests/user_events: Fix abi_test for BE archs tools/testing/selftests/user_events/abi_test.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) ----------------------------------------------------------------

1 year, 11 months

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[PATCH v3 0/5] workload-specific and memory pressure-driven zswap writeback

by Nhat Pham

Changelog: v3: * Add a patch to export per-cgroup zswap writeback counters * Add a patch to update zswap's kselftest * Separate the new list_lru functions into its own prep patch * Do not start from the top of the hierarchy when encounter a memcg that is not online for the global limit zswap writeback (patch 2) (suggested by Yosry Ahmed) * Do not remove the swap entry from list_lru in __read_swapcache_async() (patch 2) (suggested by Yosry Ahmed) * Removed a redundant zswap pool getting (patch 2) (reported by Ryan Roberts) * Use atomic for the nr_zswap_protected (instead of lruvec's lock) (patch 5) (suggested by Yosry Ahmed) * Remove the per-cgroup zswap shrinker knob (patch 5) (suggested by Yosry Ahmed) v2: * Fix loongarch compiler errors * Use pool stats instead of memcg stats when !CONFIG_MEMCG_KEM There are currently several issues with zswap writeback: 1. There is only a single global LRU for zswap, making it impossible to perform worload-specific shrinking - an memcg under memory pressure cannot determine which pages in the pool it owns, and often ends up writing pages from other memcgs. This issue has been previously observed in practice and mitigated by simply disabling memcg-initiated shrinking: https://lore.kernel.org/all/20230530232435.3097106-1-nphamcs@gmail.com/T/#u But this solution leaves a lot to be desired, as we still do not have an avenue for an memcg to free up its own memory locked up in the zswap pool. 2. We only shrink the zswap pool when the user-defined limit is hit. This means that if we set the limit too high, cold data that are unlikely to be used again will reside in the pool, wasting precious memory. It is hard to predict how much zswap space will be needed ahead of time, as this depends on the workload (specifically, on factors such as memory access patterns and compressibility of the memory pages). This patch series solves these issues by separating the global zswap LRU into per-memcg and per-NUMA LRUs, and performs workload-specific (i.e memcg- and NUMA-aware) zswap writeback under memory pressure. The new shrinker does not have any parameter that must be tuned by the user, and can be opted in or out on a per-memcg basis. As a proof of concept, we ran the following synthetic benchmark: build the linux kernel in a memory-limited cgroup, and allocate some cold data in tmpfs to see if the shrinker could write them out and improved the overall performance. Depending on the amount of cold data generated, we observe from 14% to 35% reduction in kernel CPU time used in the kernel builds. Domenico Cerasuolo (3): zswap: make shrinking memcg-aware mm: memcg: add per-memcg zswap writeback stat selftests: cgroup: update per-memcg zswap writeback selftest Nhat Pham (2): mm: list_lru: allow external numa node and cgroup tracking zswap: shrinks zswap pool based on memory pressure Documentation/admin-guide/mm/zswap.rst | 7 + include/linux/list_lru.h | 38 +++ include/linux/memcontrol.h | 7 + include/linux/mmzone.h | 14 + mm/list_lru.c | 43 ++- mm/memcontrol.c | 15 + mm/mmzone.c | 3 + mm/swap.h | 3 +- mm/swap_state.c | 38 ++- mm/zswap.c | 335 ++++++++++++++++---- tools/testing/selftests/cgroup/test_zswap.c | 74 +++-- 11 files changed, 485 insertions(+), 92 deletions(-) -- 2.34.1

1 year, 11 months

6
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[RFC PATCH v2 0/8] Introduce mseal() syscall

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)google.com> This patchset proposes a new mseal() syscall for the Linux kernel. Modern CPUs support memory permissions such as RW and NX bits. Linux has supported NX since the release of kernel version 2.6.8 in August 2004 [1]. The memory permission feature improves security stance on memory corruption bugs, i.e. the attacker can’t just write to arbitrary memory and point the code to it, the memory has to be marked with X bit, or else an exception will happen. The protection is set by mmap(2), mprotect(2), mremap(2). Memory sealing additionally protects the mapping itself against modifications. This is useful to mitigate memory corruption issues where a corrupted pointer is passed to a memory management syscall. For example, such an attacker primitive can break control-flow integrity guarantees since read-only memory that is supposed to be trusted can become writable or .text pages can get remapped. Memory sealing can automatically be applied by the runtime loader to seal .text and .rodata pages and applications can additionally seal security critical data at runtime. A similar feature already exists in the XNU kernel with the VM_FLAGS_PERMANENT [3] flag and on OpenBSD with the mimmutable syscall [4]. Also, Chrome wants to adopt this feature for their CFI work [2] and this patchset has been designed to be compatible with the Chrome use case. The new mseal() is an architecture independent syscall, and with following signature: mseal(void addr, size_t len, unsigned long types, unsigned long flags) addr/len: memory range. Must be continuous/allocated memory, or else mseal() will fail and no VMA is updated. For details on acceptable arguments, please refer to comments in mseal.c. Those are also fully covered by the selftest. types: bit mask to specify which syscall to seal. Five syscalls can be sealed, as specified by bitmasks: MM_SEAL_MPROTECT: Deny mprotect(2)/pkey_mprotect(2). MM_SEAL_MUNMAP: Deny munmap(2). MM_SEAL_MMAP: Deny mmap(2). MM_SEAL_MREMAP: Deny mremap(2). MM_SEAL_MSEAL: Deny adding a new seal type. Each bit represents sealing for one specific syscall type, e.g. MM_SEAL_MPROTECT will deny mprotect syscall. The consideration of bitmask is that the API is extendable, i.e. when needed, the sealing can be extended to madvise, mlock, etc. Backward compatibility is also easy. The kernel will remember which seal types are applied, and the application doesn’t need to repeat all existing seal types in the next mseal(). Once a seal type is applied, it can’t be unsealed. Call mseal() on an existing seal type is a no-action, not a failure. MM_SEAL_MSEAL will deny mseal() calls that try to add a new seal type. Internally, vm_area_struct adds a new field vm_seals, to store the bit masks. For the affected syscalls, such as mprotect, a check(can_modify_mm) for sealing is added, this usually happens at the early point of the syscall, before any update is made to VMAs. The effect of that is: if any of the VMAs in the given address range fails the sealing check, none of the VMA will be updated. The idea that inspired this patch comes from Stephen Röttger’s work in V8 CFI [5], Chrome browser in ChromeOS will be the first user of this API. [1] https://kernelnewbies.org/Linux_2_6_8 [2] https://v8.dev/blog/control-flow-integrity [3] https://github.com/apple-oss-distributions/xnu/blob/1031c584a5e37aff177559b… [4] https://man.openbsd.org/mimmutable.2 [5] https://docs.google.com/document/d/1O2jwK4dxI3nRcOJuPYkonhTkNQfbmwdvxQMyXge… PATCH history: v1: Use _BITUL to define MM_SEAL_XX type. Use unsigned long for seal type in sys_mseal() and other functions. Remove internal VM_SEAL_XX type and convert_user_seal_type(). Remove MM_ACTION_XX type. Remove caller_origin(ON_BEHALF_OF_XX) and replace with sealing bitmask. Add more comments in code. Add detailed commit message. v0: https://lore.kernel.org/lkml/20231016143828.647848-1-jeffxu@chromium.org/ Jeff Xu (8): mseal: Add mseal(2) syscall. mseal: Wire up mseal syscall mseal: add can_modify_mm and can_modify_vma mseal: Check seal flag for mprotect(2) mseal: Check seal flag for munmap(2) mseal: Check seal flag for mremap(2) mseal:Check seal flag for mmap(2) selftest mm/mseal mprotect/munmap/mremap/mmap arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/arm64/include/asm/unistd.h | 2 +- arch/arm64/include/asm/unistd32.h | 2 + arch/ia64/kernel/syscalls/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + fs/aio.c | 5 +- include/linux/mm.h | 44 +- include/linux/mm_types.h | 7 + include/linux/syscalls.h | 2 + include/uapi/asm-generic/unistd.h | 5 +- include/uapi/linux/mman.h | 6 + ipc/shm.c | 3 +- kernel/sys_ni.c | 1 + mm/Kconfig | 8 + mm/Makefile | 1 + mm/internal.h | 4 +- mm/mmap.c | 57 +- mm/mprotect.c | 15 + mm/mremap.c | 30 +- mm/mseal.c | 268 ++++ mm/nommu.c | 6 +- mm/util.c | 8 +- tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/mseal_test.c | 1428 +++++++++++++++++++ 37 files changed, 1891 insertions(+), 28 deletions(-) create mode 100644 mm/mseal.c create mode 100644 tools/testing/selftests/mm/mseal_test.c -- 2.42.0.655.g421f12c284-goog

1 year, 11 months

8
23
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kselftest/next kselftest-seccomp: 4 runs, 3 regressions (v6.6-rc2-51-g5247e6dbed00)

by kernelci.org bot

kselftest/next kselftest-seccomp: 4 runs, 3 regressions (v6.6-rc2-51-g5247e6dbed00) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 mt8183-kukui-...uniper-sku16 | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.6-rc2-51-g524… Test: kselftest-seccomp Tree: kselftest Branch: next Describe: v6.6-rc2-51-g5247e6dbed00 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 5247e6dbed0041147a83137f89cd45043301de5c Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6532a3e978eae5cde7efcef8 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-seccomp.login: https://kernelci.org/test/case/id/6532a3e978eae5cde7efcef9 failing since 364 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1-1-gde3ee3f63400a) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6532999b640d8c7964efceff Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-seccomp.login: https://kernelci.org/test/case/id/6532999b640d8c7964efcf00 failing since 367 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8183-kukui-...uniper-sku16 | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6532997f7b818443afefcf09 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-seccomp.login: https://kernelci.org/test/case/id/6532997f7b818443afefcf0a failing since 367 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1)

1 year, 11 months

1
0
0 0

kselftest/next kselftest-lkdtm: 3 runs, 2 regressions (v6.6-rc2-51-g5247e6dbed00)

by kernelci.org bot

kselftest/next kselftest-lkdtm: 3 runs, 2 regressions (v6.6-rc2-51-g5247e6dbed00) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 mt8183-kukui-...uniper-sku16 | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.6-rc2-51-g524… Test: kselftest-lkdtm Tree: kselftest Branch: next Describe: v6.6-rc2-51-g5247e6dbed00 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 5247e6dbed0041147a83137f89cd45043301de5c Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6532997c7ca6fe2120efcf09 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/6532997c7ca6fe2120efcf0a failing since 367 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8183-kukui-...uniper-sku16 | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/653299b617bc944cf5efcf16 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/653299b617bc944cf5efcf17 failing since 367 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1)

1 year, 11 months

1
0
0 0

kselftest/next kselftest-lib: 3 runs, 3 regressions (v6.6-rc2-51-g5247e6dbed00)

by kernelci.org bot

kselftest/next kselftest-lib: 3 runs, 3 regressions (v6.6-rc2-51-g5247e6dbed00) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-g12b-a311d-khadas-vim3 | arm64 | lab-collabora | gcc-10 | defconfig+kselftest | 1 meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.6-rc2-51-g524… Test: kselftest-lib Tree: kselftest Branch: next Describe: v6.6-rc2-51-g5247e6dbed00 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 5247e6dbed0041147a83137f89cd45043301de5c Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-g12b-a311d-khadas-vim3 | arm64 | lab-collabora | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6532992d69d113fe83efcf05 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-lib.login: https://kernelci.org/test/case/id/6532992d69d113fe83efcf06 failing since 367 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6532a2c12f43abecb6efcef8 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-lib.login: https://kernelci.org/test/case/id/6532a2c12f43abecb6efcef9 failing since 364 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1-1-gde3ee3f63400a) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6532998b640d8c7964efcef9 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-lib.login: https://kernelci.org/test/case/id/6532998b640d8c7964efcefa failing since 367 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1)

1 year, 11 months

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kselftest/next kselftest-cpufreq: 8 runs, 4 regressions (v6.6-rc2-51-g5247e6dbed00)

by kernelci.org bot

kselftest/next kselftest-cpufreq: 8 runs, 4 regressions (v6.6-rc2-51-g5247e6dbed00) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 sun50i-h5-lib...ch-all-h3-cc | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.6-rc2-51-g524… Test: kselftest-cpufreq Tree: kselftest Branch: next Describe: v6.6-rc2-51-g5247e6dbed00 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 5247e6dbed0041147a83137f89cd45043301de5c Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-gxl-s905x-libretech-cc | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6532a25830fc983750efcef3 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/6532a25830fc983750efcef4 failing since 364 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1-1-gde3ee3f63400a) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/653299b917bc944cf5efcf1c Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/653299b917bc944cf5efcf1d failing since 367 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ sun50i-a64-pine64-plus | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/65329c326baa1a7f3defcef3 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/65329c326baa1a7f3defcef4 failing since 356 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1-8-g94fea664ae4ee) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ sun50i-h5-lib...ch-all-h3-cc | arm64 | lab-broonie | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6532a27130fc983750efcef6 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/6532a27130fc983750efcef7 failing since 352 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1-13-g67c0b2b52916)

1 year, 11 months

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kselftest/next kselftest-livepatch: 1 runs, 1 regressions (v6.6-rc2-51-g5247e6dbed00)

by kernelci.org bot

kselftest/next kselftest-livepatch: 1 runs, 1 regressions (v6.6-rc2-51-g5247e6dbed00) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.6-rc2-51-g524… Test: kselftest-livepatch Tree: kselftest Branch: next Describe: v6.6-rc2-51-g5247e6dbed00 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 5247e6dbed0041147a83137f89cd45043301de5c Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/65329986640d8c7964efcef3 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… HTML log: https://storage.kernelci.org//kselftest/next/v6.6-rc2-51-g5247e6dbed00/arm6… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2023062… * kselftest-livepatch.login: https://kernelci.org/test/case/id/65329986640d8c7964efcef4 failing since 367 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1)

1 year, 11 months

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[PATCH 1/1] selftests: KVM: add test to print boottime wallclock

by Dongli Zhang

As inspired by the discussion in [1], the boottime wallclock may drift due to the fact that the masterclock (or host monotonic clock) and kvmclock are calculated based on the algorithms in different domains. This is to introduce a testcase to print the boottime wallclock periodically to help diagnose the wallclock drift issue in the future. The idea is to wrmsr the MSR_KVM_WALL_CLOCK_NEW, and read the boottime wallclock nanoseconds immediately. References: [1] https://lore.kernel.org/all/20231001111313.77586-1-nsaenz@amazon.com Cc: David Woodhouse <dwmw(a)amazon.co.uk> Signed-off-by: Dongli Zhang <dongli.zhang(a)oracle.com> --- tools/testing/selftests/kvm/Makefile | 3 +- .../selftests/kvm/x86_64/boottime_wallclock.c | 100 ++++++++++++++++++ 2 files changed, 102 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/kvm/x86_64/boottime_wallclock.c diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index a3bb36fb3cfc..fea05b0118de 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -60,7 +60,8 @@ LIBKVM_riscv += lib/riscv/ucall.c TEST_PROGS_x86_64 += x86_64/nx_huge_pages_test.sh # Compiled test targets -TEST_GEN_PROGS_x86_64 = x86_64/cpuid_test +TEST_GEN_PROGS_x86_64 = x86_64/boottime_wallclock +TEST_GEN_PROGS_x86_64 += x86_64/cpuid_test TEST_GEN_PROGS_x86_64 += x86_64/cr4_cpuid_sync_test TEST_GEN_PROGS_x86_64 += x86_64/dirty_log_page_splitting_test TEST_GEN_PROGS_x86_64 += x86_64/get_msr_index_features diff --git a/tools/testing/selftests/kvm/x86_64/boottime_wallclock.c b/tools/testing/selftests/kvm/x86_64/boottime_wallclock.c new file mode 100644 index 000000000000..cc48c9b19920 --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/boottime_wallclock.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2023 Oracle and/or its affiliates. + */ + +#include <asm/kvm_para.h> +#include <asm/pvclock-abi.h> + +#include "kvm_util.h" +#include "processor.h" + +static int period = 10; + +#define GUEST_SYNC_WALLCLOCK(__stage, __val) \ + GUEST_SYNC_ARGS(__stage, __val, 0, 0, 0) + +static void guest_main(vm_paddr_t wc_pa, struct pvclock_wall_clock *wc) +{ + uint64_t wallclock; + + while (true) { + wrmsr(MSR_KVM_WALL_CLOCK_NEW, wc_pa); + + wallclock = wc->sec * NSEC_PER_SEC + wc->nsec; + + GUEST_SYNC_WALLCLOCK(0, wallclock); + } +} + +static void handle_sync(struct ucall *uc) +{ + uint64_t wallclock; + + wallclock = uc->args[2]; + + pr_info("Boottime wallclock value: %"PRIu64" ns\n", wallclock); +} + +static void handle_abort(struct ucall *uc) +{ + REPORT_GUEST_ASSERT(*uc); +} + +static void enter_guest(struct kvm_vcpu *vcpu) +{ + struct ucall uc; + + while (true) { + vcpu_run(vcpu); + + TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO); + + switch (get_ucall(vcpu, &uc)) { + case UCALL_SYNC: + handle_sync(&uc); + break; + case UCALL_ABORT: + handle_abort(&uc); + return; + default: + TEST_ASSERT(0, "unhandled ucall: %ld\n", uc.cmd); + return; + } + + sleep(period); + } +} + +int main(int argc, char *argv[]) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + vm_vaddr_t wc_gva; + vm_paddr_t wc_gpa; + int opt; + + while ((opt = getopt(argc, argv, "p:h")) != -1) { + switch (opt) { + case 'p': + period = atoi_positive("The period (seconds)", optarg); + break; + case 'h': + default: + pr_info("usage: %s [-p period (seconds)]\n", argv[0]); + exit(1); + } + } + + pr_info("Capture boottime wallclock every %d seconds.\n", period); + pr_info("Stop with Ctrl + c.\n\n"); + + vm = vm_create_with_one_vcpu(&vcpu, guest_main); + + wc_gva = vm_vaddr_alloc(vm, getpagesize(), 0x10000); + wc_gpa = addr_gva2gpa(vm, wc_gva); + vcpu_args_set(vcpu, 2, wc_gpa, wc_gva); + + enter_guest(vcpu); + kvm_vm_free(vm); +} -- 2.34.1

1 year, 11 months

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