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[PATCH] selftests/thermal: Remove duplicate sprintf() call in workload_hint_test

by WangYuli

Remove redundant sprintf() call that was duplicating the same operation of formatting delay_str with argv[1]. Signed-off-by: WangYuli <wangyuli(a)uniontech.com> --- .../selftests/thermal/intel/workload_hint/workload_hint_test.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/tools/testing/selftests/thermal/intel/workload_hint/workload_hint_test.c b/tools/testing/selftests/thermal/intel/workload_hint/workload_hint_test.c index a40097232967..bda006af8b1b 100644 --- a/tools/testing/selftests/thermal/intel/workload_hint/workload_hint_test.c +++ b/tools/testing/selftests/thermal/intel/workload_hint/workload_hint_test.c @@ -67,8 +67,6 @@ int main(int argc, char **argv) if (delay < 0) exit(1); - sprintf(delay_str, "%s\n", argv[1]); - sprintf(delay_str, "%s\n", argv[1]); fd = open(WORKLOAD_NOTIFICATION_DELAY_ATTRIBUTE, O_RDWR); if (fd < 0) { -- 2.50.0

6 months

[PATCH v3] selftests: futex: define SYS_futex on 32-bit architectures with 64-bit time_t

by Ben Zong-You Xie

From: Cynthia Huang <cynthia(a)andestech.com> Linux kernel does not provide sys_futex() on some 32-bit architectures that do not support 32-bit time representations, such as riscv32. As a result, glibc cannot define SYS_futex, causing compilation failures in tests that rely on this syscall. Define SYS_futex as SYS_futex_time64 in such cases to ensure successful compilation and compatibility. Signed-off-by: Cynthia Huang <cynthia(a)andestech.com> Signed-off-by: Ben Zong-You Xie <ben717(a)andestech.com> Reviewed-by: Muhammad Usama Anjum <usama.anjum(a)collabora.com> --- Changes since v2: - Refine the commit message suggested by tglx - Attribute the authorship to Cynthia - Add the Reviewed-by tag from Muhammad v2 : https://lore.kernel.org/all/20250627090812.937939-1-ben717@andestech.com/ Changes since v1: - Fix the SOB chain v1 : https://lore.kernel.org/all/20250527093536.3646143-1-ben717@andestech.com/ --- tools/testing/selftests/futex/include/futextest.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/testing/selftests/futex/include/futextest.h b/tools/testing/selftests/futex/include/futextest.h index ddbcfc9b7bac..7a5fd1d5355e 100644 --- a/tools/testing/selftests/futex/include/futextest.h +++ b/tools/testing/selftests/futex/include/futextest.h @@ -47,6 +47,17 @@ typedef volatile u_int32_t futex_t; FUTEX_PRIVATE_FLAG) #endif +/* + * SYS_futex is expected from system C library, in glibc some 32-bit + * architectures (e.g. RV32) are using 64-bit time_t, therefore it doesn't have + * SYS_futex defined but just SYS_futex_time64. Define SYS_futex as + * SYS_futex_time64 in this situation to ensure the compilation and the + * compatibility. + */ +#if !defined(SYS_futex) && defined(SYS_futex_time64) +#define SYS_futex SYS_futex_time64 +#endif + /** * futex() - SYS_futex syscall wrapper * @uaddr: address of first futex -- 2.34.1

6 months

[PATCH v7 00/28] iommufd: Add vIOMMU infrastructure (Part-4 HW QUEUE)

by Nicolin Chen

6 months

[PATCH] vdso/gettimeofday: Fix code refactoring

by Marek Szyprowski

Commit fcc8e46f768f ("vdso/gettimeofday: Return bool from clock_gettime() helpers") changed the return value from clock_gettime() helpers, but it missed updating the one call to the do_hres() function, what breaks VDSO operation on some of my ARM 32bit based test boards. Fix this. Fixes: fcc8e46f768f ("vdso/gettimeofday: Return bool from clock_gettime() helpers") Signed-off-by: Marek Szyprowski <m.szyprowski(a)samsung.com> --- lib/vdso/gettimeofday.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c index d6743ed756a1..97aa9059a5c9 100644 --- a/lib/vdso/gettimeofday.c +++ b/lib/vdso/gettimeofday.c @@ -395,7 +395,7 @@ __cvdso_gettimeofday_data(const struct vdso_time_data *vd, if (likely(tv != NULL)) { struct __kernel_timespec ts; - if (do_hres(vd, &vc[CS_HRES_COARSE], CLOCK_REALTIME, &ts)) + if (!do_hres(vd, &vc[CS_HRES_COARSE], CLOCK_REALTIME, &ts)) return gettimeofday_fallback(tv, tz); tv->tv_sec = ts.tv_sec; -- 2.34.1

6 months

[PATCH v8 00/29] iommufd: Add vIOMMU infrastructure (Part-4 HW QUEUE)

by Nicolin Chen

The vIOMMU object is designed to represent a slice of an IOMMU HW for its virtualization features shared with or passed to user space (a VM mostly) in a way of HW acceleration. This extended the HWPT-based design for more advanced virtualization feature. HW QUEUE introduced by this series as a part of the vIOMMU infrastructure represents a HW accelerated queue/buffer for VM to use exclusively, e.g. - NVIDIA's Virtual Command Queue - AMD vIOMMU's Command Buffer, Event Log Buffer, and PPR Log Buffer each of which allows its IOMMU HW to directly access a queue memory owned by a guest VM and allows a guest OS to control the HW queue direclty, to avoid VM Exit overheads to improve the performance. Introduce IOMMUFD_OBJ_HW_QUEUE and its pairing IOMMUFD_CMD_HW_QUEUE_ALLOC allowing VMM to forward the IOMMU-specific queue info, such as queue base address, size, and etc. Meanwhile, a guest-owned queue needs the guest kernel to control the queue by reading/writing its consumer and producer indexes, via MMIO acceses to the hardware MMIO registers. Introduce an mmap infrastructure for iommufd to support passing through a piece of MMIO region from the host physical address space to the guest physical address space. The mmap info (offset/ length) used by an mmap syscall must be pre-allocated and returned to the user space via an output driver-data during an IOMMUFD_CMD_HW_QUEUE_ALLOC call. Thus, it requires a driver-specific user data support in the vIOMMU allocation flow. As a real-world use case, this series implements a HW QUEUE support in the tegra241-cmdqv driver for VCMDQs on NVIDIA Grace CPU. In another word, it is also the Tegra CMDQV series Part-2 (user-space support), reworked from Previous RFCv1: https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/ This enables the HW accelerated feature for NVIDIA Grace CPU. Compared to the standard SMMUv3 operating in the nested translation mode trapping CMDQ for TLBI and ATC_INV commands, this gives a huge performance improvement: 70% to 90% reductions of invalidation time were measured by various DMA unmap tests running in a guest OS. // Unmap latencies from "dma_map_benchmark -g @granule -t @threads", // by toggling "/sys/kernel/debug/iommu/tegra241_cmdqv/bypass_vcmdq" @granule | @threads | bypass_vcmdq=1 | bypass_vcmdq=0 4KB 1 35.7 us 5.3 us 16KB 1 41.8 us 6.8 us 64KB 1 68.9 us 9.9 us 128KB 1 109.0 us 12.6 us 256KB 1 187.1 us 18.0 us 4KB 2 96.9 us 6.8 us 16KB 2 97.8 us 7.5 us 64KB 2 151.5 us 10.7 us 128KB 2 257.8 us 12.7 us 256KB 2 443.0 us 17.9 us This is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_hw_queue-v8 Paring QEMU branch for testing: https://github.com/nicolinc/qemu/commits/wip/for_iommufd_hw_queue-v8 Changelog (attached git-diff v7..v8 at the end of this letter) v8 * Add Reviewed-by from Pranj, Kevin and Jason * Improve kdoc and comments * [iommufd] Skip selftest for no_viommu variants * [iommufd] Add unmap coverage for non internal area * [iommufd] Skip the first page when mtree_alloc_range() * [iommufd] Correct the passed in index to mtree_erase() * [iommufd] Correct variable types in iommufd_hw_queue_alloc_phys() * [iommufd] Reject iopt_unmap_iova_range() if area->num_locked is set * [tegra] Rename "SID replacement" with "SID mapping" * [tegra] Unwrap useless _tegra241_vcmdq_hw_init helper v7 https://lore.kernel.org/all/cover.1750966133.git.nicolinc@nvidia.com/ * Rebased on Jason's for-next tree (iommufd_hw_queue-prep series) * Add Reviewed-by from Baolu, Jason, Pranjal * Update kdocs and notes * [iommu] Replace "u32" with "enum iommu_hw_info_type" * [iommufd] Rename vdev->id to vdev->virt_id * [iommufd] Replace macros with inline helpers * [iommufd] Report unmapped_bytes in error path * [iommufd] Add iommufd_access_is_internal helper * [iommufd] Do not drop ops->unmap check for mdevs * [iommufd] Store physical addresses in immap structure * [iommufd] Reorder access and hw_queue object allocations * [iommufd] Scan for an internal access before any unmap call * [iommufd] Drop unused ictx pointer in struct iommufd_hw_queue * [iommufd] Use kcalloc to avoid failure due to memory fragmentation * [tegra] Use "else" * [tegra] Lock destroy() using lvcmdq_mutex v6 https://lore.kernel.org/all/cover.1749884998.git.nicolinc@nvidia.com/ * Rebase on iommufd_hw_queue-prep-v2 * Add Reviewed-by from Kevin and Jason * [iommufd] Update kdocs and notes * [iommufd] Drop redundant pages[i] check * [iommufd] Allow nesting_parent_iova to be 0 * [iommufd] Add iommufd_hw_queue_alloc_phys() * [iommufd] Revise iommufd_viommu_alloc/destroy_mmap APIs * [iommufd] Move destroy ops to vdevice/hw_queue structures * [iommufd] Add union in hw_info struct to share out_data_type field * [iommufd] Replace iopt_pin/unpin_pages() with internal access APIs * [iommufd] Replace vdevice_alloc with vdevice_size and vdevice_init * [iommufd] Replace hw_queue_alloc with get_hw_queue_size/hw_queue_init * [iommufd] Replace IOMMUFD_VIOMMU_FLAG_HW_QUEUE_READS_PA with init_phys * [smmu] Drop arm_smmu_domain_ipa_to_pa * [smmu] Update arm_smmu_impl_ops changes for vsmmu_init * [tegra] Add a vdev_to_vsid macro * [tegra] Add lvcmdq_mutex to protect multi queues * [tegra] Drop duplicated kcalloc for vintf->lvcmdqs (memory leak) v5 https://lore.kernel.org/all/cover.1747537752.git.nicolinc@nvidia.com/ * Rebase on v6.15-rc6 * Add Reviewed-by from Jason and Kevin * Correct typos in kdoc and update commit logs * [iommufd] Add a cosmetic fix * [iommufd] Drop unused num_pfns * [iommufd] Drop unnecessary check * [iommufd] Reorder patch sequence * [iommufd] Use io_remap_pfn_range() * [iommufd] Use success oriented flow * [iommufd] Fix max_npages calculation * [iommufd] Add more selftest coverage * [iommufd] Drop redundant static_assert * [iommufd] Fix mmap pfn range validation * [iommufd] Reject unmap on pinned iovas * [iommufd] Drop redundant vm_flags_set() * [iommufd] Drop iommufd_struct_destroy() * [iommufd] Drop redundant queue iova test * [iommufd] Use "mmio_addr" and "mmio_pfn" * [iommufd] Rename to "nesting_parent_iova" * [iommufd] Make iopt_pin_pages call option * [iommufd] Add ictx comparison in depend() * [iommufd] Add iommufd_object_alloc_ucmd() * [iommufd] Move kcalloc() after validations * [iommufd] Replace ictx setting with WARN_ON * [iommufd] Make hw_info's type bidirectional * [smmu] Add supported_vsmmu_type in impl_ops * [smmu] Drop impl report in smmu vendor struct * [tegra] Add IOMMU_HW_INFO_TYPE_TEGRA241_CMDQV * [tegra] Replace "number of VINTFs" with a note * [tegra] Drop the redundant lvcmdq pointer setting * [tegra] Flag IOMMUFD_VIOMMU_FLAG_HW_QUEUE_READS_PA * [tegra] Use "vintf_alloc_vsid" for vdevice_alloc op v4 https://lore.kernel.org/all/cover.1746757630.git.nicolinc@nvidia.com/ * Rebase on v6.15-rc5 * Add Reviewed-by from Vasant * Rename "vQUEUE" to "HW QUEUE" * Use "offset" and "length" for all mmap-related variables * [iommufd] Use u64 for guest PA * [iommufd] Fix typo in uAPI doc * [iommufd] Rename immap_id to offset * [iommufd] Drop the partial-size mmap support * [iommufd] Do not replace WARN_ON with WARN_ON_ONCE * [iommufd] Use "u64 base_addr" for queue base address * [iommufd] Use u64 base_pfn/num_pfns for immap structure * [iommufd] Correct the size passed in to mtree_alloc_range() * [iommufd] Add IOMMUFD_VIOMMU_FLAG_HW_QUEUE_READS_PA to viommu_ops v3 https://lore.kernel.org/all/cover.1746139811.git.nicolinc@nvidia.com/ * Add Reviewed-by from Baolu, Pranjal, and Alok * Revise kdocs, uAPI docs, and commit logs * Rename "vCMDQ" back to "vQUEUE" for AMD cases * [tegra] Add tegra241_vcmdq_hw_flush_timeout() * [tegra] Rename vsmmu_alloc to alloc_vintf_user * [tegra] Use writel for SID replacement registers * [tegra] Move mmap removal call to vsmmu_destroy op * [tegra] Fix revert in tegra241_vintf_alloc_lvcmdq_user() * [iommufd] Replace "& ~PAGE_MASK" with PAGE_ALIGNED() * [iommufd] Add an object-type "owner" to immap structure * [iommufd] Drop the ictx input in the new for-driver APIs * [iommufd] Add iommufd_vma_ops to keep track of mmap lifecycle * [iommufd] Add viommu-based iommufd_viommu_alloc/destroy_mmap helpers * [iommufd] Rename iommufd_ctx_alloc/free_mmap to _iommufd_alloc/destroy_mmap v2 https://lore.kernel.org/all/cover.1745646960.git.nicolinc@nvidia.com/ * Add Reviewed-by from Jason * [smmu] Fix vsmmu initial value * [smmu] Support impl for hw_info * [tegra] Rename "slot" to "vsid" * [tegra] Update kdocs and commit logs * [tegra] Map/unmap LVCMDQ dynamically * [tegra] Refcount the previous LVCMDQ * [tegra] Return -EEXIST if LVCMDQ exists * [tegra] Simplify VINTF cleanup routine * [tegra] Use vmid and s2_domain in vsmmu * [tegra] Rename "mmap_pgoff" to "immap_id" * [tegra] Add more addr and length validation * [iommufd] Add more narrative to mmap's kdoc * [iommufd] Add iommufd_struct_depend/undepend() * [iommufd] Rename vcmdq_free op to vcmdq_destroy * [iommufd] Fix bug in iommu_copy_struct_to_user() * [iommufd] Drop is_io from iommufd_ctx_alloc_mmap() * [iommufd] Test the queue memory for its contiguity * [iommufd] Return -ENXIO if address or length fails * [iommufd] Do not change @min_last in mock_viommu_alloc() * [iommufd] Generalize TEGRA241_VCMDQ data in core structure * [iommufd] Add selftest coverage for IOMMUFD_CMD_VCMDQ_ALLOC * [iommufd] Add iopt_pin_pages() to prevent queue memory from unmapping v1 https://lore.kernel.org/all/cover.1744353300.git.nicolinc@nvidia.com/ Thanks Nicolin Nicolin Chen (29): iommufd: Report unmapped bytes in the error path of iopt_unmap_iova_range iommufd: Correct virt_id kdoc at struct iommu_vdevice_alloc iommufd/viommu: Explicitly define vdev->virt_id iommu: Use enum iommu_hw_info_type for type in hw_info op iommu: Add iommu_copy_struct_to_user helper iommu: Pass in a driver-level user data structure to viommu_init op iommufd/viommu: Allow driver-specific user data for a vIOMMU object iommufd/selftest: Support user_data in mock_viommu_alloc iommufd/selftest: Add coverage for viommu data iommufd/access: Add internal APIs for HW queue to use iommufd/access: Bypass access->ops->unmap for internal use iommufd/viommu: Add driver-defined vDEVICE support iommufd/viommu: Introduce IOMMUFD_OBJ_HW_QUEUE and its related struct iommufd/viommu: Add IOMMUFD_CMD_HW_QUEUE_ALLOC ioctl iommufd/driver: Add iommufd_hw_queue_depend/undepend() helpers iommufd/selftest: Add coverage for IOMMUFD_CMD_HW_QUEUE_ALLOC iommufd: Add mmap interface iommufd/selftest: Add coverage for the new mmap interface Documentation: userspace-api: iommufd: Update HW QUEUE iommu: Allow an input type in hw_info op iommufd: Allow an input data_type via iommu_hw_info iommufd/selftest: Update hw_info coverage for an input data_type iommu/arm-smmu-v3-iommufd: Add vsmmu_size/type and vsmmu_init impl ops iommu/arm-smmu-v3-iommufd: Add hw_info to impl_ops iommu/tegra241-cmdqv: Use request_threaded_irq iommu/tegra241-cmdqv: Simplify deinit flow in tegra241_cmdqv_remove_vintf() iommu/tegra241-cmdqv: Do not statically map LVCMDQs iommu/tegra241-cmdqv: Add user-space use support iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 22 +- drivers/iommu/iommufd/io_pagetable.h | 5 +- drivers/iommu/iommufd/iommufd_private.h | 46 +- drivers/iommu/iommufd/iommufd_test.h | 20 + include/linux/iommu.h | 50 +- include/linux/iommufd.h | 160 ++++++ include/uapi/linux/iommufd.h | 147 +++++- tools/testing/selftests/iommu/iommufd_utils.h | 89 +++- .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 28 +- .../iommu/arm/arm-smmu-v3/tegra241-cmdqv.c | 477 +++++++++++++++++- drivers/iommu/intel/iommu.c | 7 +- drivers/iommu/iommufd/device.c | 87 +++- drivers/iommu/iommufd/driver.c | 82 ++- drivers/iommu/iommufd/io_pagetable.c | 13 +- drivers/iommu/iommufd/main.c | 69 +++ drivers/iommu/iommufd/pages.c | 12 +- drivers/iommu/iommufd/selftest.c | 153 +++++- drivers/iommu/iommufd/viommu.c | 215 +++++++- tools/testing/selftests/iommu/iommufd.c | 140 ++++- .../selftests/iommu/iommufd_fail_nth.c | 15 +- Documentation/userspace-api/iommufd.rst | 12 + 21 files changed, 1739 insertions(+), 110 deletions(-) -- 2.43.0 diff --git a/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c b/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c index d57a3bea948c..d5d43a1c7708 100644 --- a/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c +++ b/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c @@ -161,7 +161,7 @@ struct tegra241_vcmdq { * @lvcmdq_mutex: Lock to serialize user-allocated lvcmdqs * @base: MMIO base address * @mmap_offset: Offset argument for mmap() syscall - * @sids: Stream ID replacement resources + * @sids: Stream ID mapping resources */ struct tegra241_vintf { struct arm_vsmmu vsmmu; @@ -183,11 +183,11 @@ struct tegra241_vintf { #define viommu_to_vintf(v) container_of(v, struct tegra241_vintf, vsmmu.core) /** - * struct tegra241_vintf_sid - Virtual Interface Stream ID Replacement + * struct tegra241_vintf_sid - Virtual Interface Stream ID Mapping * @core: Embedded iommufd_vdevice structure, holding virtual Stream ID * @vintf: Parent VINTF pointer * @sid: Physical Stream ID - * @idx: Replacement index in the VINTF + * @idx: Mapping index in the VINTF */ struct tegra241_vintf_sid { struct iommufd_vdevice core; @@ -207,7 +207,7 @@ struct tegra241_vintf_sid { * @num_vintfs: Total number of VINTFs * @num_vcmdqs: Total number of VCMDQs * @num_lvcmdqs_per_vintf: Number of logical VCMDQs per VINTF - * @num_sids_per_vintf: Total number of SID replacements per VINTF + * @num_sids_per_vintf: Total number of SID mappings per VINTF * @vintf_ids: VINTF id allocator * @vintfs: List of VINTFs */ @@ -470,12 +470,6 @@ static void tegra241_vcmdq_hw_deinit(struct tegra241_vcmdq *vcmdq) dev_dbg(vcmdq->cmdqv->dev, "%sdeinited\n", h); } -/* This function is for LVCMDQ, so @vcmdq must be mapped prior */ -static void _tegra241_vcmdq_hw_init(struct tegra241_vcmdq *vcmdq) -{ - writeq_relaxed(vcmdq->cmdq.q.q_base, REG_VCMDQ_PAGE1(vcmdq, BASE)); -} - /* This function is for LVCMDQ, so @vcmdq must be mapped prior */ static int tegra241_vcmdq_hw_init(struct tegra241_vcmdq *vcmdq) { @@ -486,7 +480,7 @@ static int tegra241_vcmdq_hw_init(struct tegra241_vcmdq *vcmdq) tegra241_vcmdq_hw_deinit(vcmdq); /* Configure and enable VCMDQ */ - _tegra241_vcmdq_hw_init(vcmdq); + writeq_relaxed(vcmdq->cmdq.q.q_base, REG_VCMDQ_PAGE1(vcmdq, BASE)); ret = vcmdq_write_config(vcmdq, VCMDQ_EN); if (ret) { @@ -1077,7 +1071,7 @@ static int tegra241_vcmdq_hw_init_user(struct tegra241_vcmdq *vcmdq) char header[64]; /* Configure the vcmdq only; User space does the enabling */ - _tegra241_vcmdq_hw_init(vcmdq); + writeq_relaxed(vcmdq->cmdq.q.q_base, REG_VCMDQ_PAGE1(vcmdq, BASE)); dev_dbg(vcmdq->cmdqv->dev, "%sinited at host PA 0x%llx size 0x%lx\n", lvcmdq_error_header(vcmdq, header, 64), @@ -1259,6 +1253,7 @@ static int tegra241_vintf_init_vsid(struct iommufd_vdevice *vdev) static struct iommufd_viommu_ops tegra241_cmdqv_viommu_ops = { .destroy = tegra241_cmdqv_destroy_vintf_user, .alloc_domain_nested = arm_vsmmu_alloc_domain_nested, + /* Non-accelerated commands will be still handled by the kernel */ .cache_invalidate = arm_vsmmu_cache_invalidate, .vdevice_size = VDEVICE_STRUCT_SIZE(struct tegra241_vintf_sid, core), .vdevice_init = tegra241_vintf_init_vsid, diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index cbd86aabdd1c..e2ba21c43ad2 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -1245,26 +1245,18 @@ EXPORT_SYMBOL_NS_GPL(iommufd_access_replace, "IOMMUFD"); * run in the future. Due to this a driver must not create locking that prevents * unmap to complete while iommufd_access_destroy() is running. */ -int iommufd_access_notify_unmap(struct io_pagetable *iopt, unsigned long iova, - unsigned long length) +void iommufd_access_notify_unmap(struct io_pagetable *iopt, unsigned long iova, + unsigned long length) { struct iommufd_ioas *ioas = container_of(iopt, struct iommufd_ioas, iopt); struct iommufd_access *access; unsigned long index; - int ret = 0; xa_lock(&ioas->iopt.access_list); - /* Bypass any unmap if there is an internal access */ xa_for_each(&ioas->iopt.access_list, index, access) { - if (iommufd_access_is_internal(access)) { - ret = -EBUSY; - goto unlock; - } - } - - xa_for_each(&ioas->iopt.access_list, index, access) { - if (!iommufd_lock_obj(&access->obj)) + if (!iommufd_lock_obj(&access->obj) || + iommufd_access_is_internal(access)) continue; xa_unlock(&ioas->iopt.access_list); @@ -1273,9 +1265,7 @@ int iommufd_access_notify_unmap(struct io_pagetable *iopt, unsigned long iova, iommufd_put_object(access->ictx, &access->obj); xa_lock(&ioas->iopt.access_list); } -unlock: xa_unlock(&ioas->iopt.access_list); - return ret; } /** @@ -1290,6 +1280,7 @@ int iommufd_access_notify_unmap(struct io_pagetable *iopt, unsigned long iova, void iommufd_access_unpin_pages(struct iommufd_access *access, unsigned long iova, unsigned long length) { + bool internal = iommufd_access_is_internal(access); struct iopt_area_contig_iter iter; struct io_pagetable *iopt; unsigned long last_iova; @@ -1316,7 +1307,8 @@ void iommufd_access_unpin_pages(struct iommufd_access *access, area, iopt_area_iova_to_index(area, iter.cur_iova), iopt_area_iova_to_index( area, - min(last_iova, iopt_area_last_iova(area)))); + min(last_iova, iopt_area_last_iova(area))), + internal); WARN_ON(!iopt_area_contig_done(&iter)); up_read(&iopt->iova_rwsem); mutex_unlock(&access->ioas_lock); @@ -1365,6 +1357,7 @@ int iommufd_access_pin_pages(struct iommufd_access *access, unsigned long iova, unsigned long length, struct page **out_pages, unsigned int flags) { + bool internal = iommufd_access_is_internal(access); struct iopt_area_contig_iter iter; struct io_pagetable *iopt; unsigned long last_iova; @@ -1374,8 +1367,7 @@ int iommufd_access_pin_pages(struct iommufd_access *access, unsigned long iova, /* Driver's ops don't support pin_pages */ if (IS_ENABLED(CONFIG_IOMMUFD_TEST) && WARN_ON(access->iova_alignment != PAGE_SIZE || - (!iommufd_access_is_internal(access) && - !access->ops->unmap))) + (!internal && !access->ops->unmap))) return -EINVAL; if (!length) @@ -1409,7 +1401,7 @@ int iommufd_access_pin_pages(struct iommufd_access *access, unsigned long iova, } rc = iopt_area_add_access(area, index, last_index, out_pages, - flags); + flags, internal); if (rc) goto err_remove; out_pages += last_index - index + 1; @@ -1432,7 +1424,8 @@ int iommufd_access_pin_pages(struct iommufd_access *access, unsigned long iova, iopt_area_iova_to_index(area, iter.cur_iova), iopt_area_iova_to_index( area, min(last_iova, - iopt_area_last_iova(area)))); + iopt_area_last_iova(area))), + internal); } up_read(&iopt->iova_rwsem); mutex_unlock(&access->ioas_lock); diff --git a/drivers/iommu/iommufd/driver.c b/drivers/iommu/iommufd/driver.c index 2c9af93217f1..153e4720ee18 100644 --- a/drivers/iommu/iommufd/driver.c +++ b/drivers/iommu/iommufd/driver.c @@ -56,8 +56,9 @@ int _iommufd_alloc_mmap(struct iommufd_ctx *ictx, struct iommufd_object *owner, immap->length = length; immap->mmio_addr = mmio_addr; - rc = mtree_alloc_range(&ictx->mt_mmap, &startp, immap, immap->length, 0, - PHYS_ADDR_MAX, GFP_KERNEL); + /* Skip the first page to ease caller identifying the returned offset */ + rc = mtree_alloc_range(&ictx->mt_mmap, &startp, immap, immap->length, + PAGE_SIZE, PHYS_ADDR_MAX, GFP_KERNEL); if (rc < 0) { kfree(immap); return rc; @@ -76,7 +77,7 @@ void _iommufd_destroy_mmap(struct iommufd_ctx *ictx, { struct iommufd_mmap *immap; - immap = mtree_erase(&ictx->mt_mmap, offset >> PAGE_SHIFT); + immap = mtree_erase(&ictx->mt_mmap, offset); WARN_ON_ONCE(!immap || immap->owner != owner); kfree(immap); } diff --git a/drivers/iommu/iommufd/io_pagetable.c b/drivers/iommu/iommufd/io_pagetable.c index 6b8477b1f94b..abf4aadca96c 100644 --- a/drivers/iommu/iommufd/io_pagetable.c +++ b/drivers/iommu/iommufd/io_pagetable.c @@ -719,6 +719,12 @@ static int iopt_unmap_iova_range(struct io_pagetable *iopt, unsigned long start, goto out_unlock_iova; } + /* The area is locked by an object that has not been destroyed */ + if (area->num_locks) { + rc = -EBUSY; + goto out_unlock_iova; + } + if (area_first < start || area_last > last) { rc = -ENOENT; goto out_unlock_iova; @@ -740,15 +746,7 @@ static int iopt_unmap_iova_range(struct io_pagetable *iopt, unsigned long start, up_write(&iopt->iova_rwsem); up_read(&iopt->domains_rwsem); - rc = iommufd_access_notify_unmap(iopt, area_first, - length); - if (rc) { - down_read(&iopt->domains_rwsem); - down_write(&iopt->iova_rwsem); - area->prevent_access = false; - goto out_unlock_iova; - } - + iommufd_access_notify_unmap(iopt, area_first, length); /* Something is not responding to unmap requests. */ tries++; if (WARN_ON(tries > 100)) { diff --git a/drivers/iommu/iommufd/io_pagetable.h b/drivers/iommu/iommufd/io_pagetable.h index c115a51d9384..b6064f4ce4af 100644 --- a/drivers/iommu/iommufd/io_pagetable.h +++ b/drivers/iommu/iommufd/io_pagetable.h @@ -48,6 +48,7 @@ struct iopt_area { int iommu_prot; bool prevent_access : 1; unsigned int num_accesses; + unsigned int num_locks; }; struct iopt_allowed { @@ -238,9 +239,9 @@ void iopt_pages_unfill_xarray(struct iopt_pages *pages, unsigned long start, int iopt_area_add_access(struct iopt_area *area, unsigned long start, unsigned long last, struct page **out_pages, - unsigned int flags); + unsigned int flags, bool lock_area); void iopt_area_remove_access(struct iopt_area *area, unsigned long start, - unsigned long last); + unsigned long last, bool unlock_area); int iopt_pages_rw_access(struct iopt_pages *pages, unsigned long start_byte, void *data, unsigned long length, unsigned int flags); diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index ebac6a4b3538..cd14163abdd1 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -125,8 +125,8 @@ int iopt_read_and_clear_dirty_data(struct io_pagetable *iopt, int iopt_set_dirty_tracking(struct io_pagetable *iopt, struct iommu_domain *domain, bool enable); -int iommufd_access_notify_unmap(struct io_pagetable *iopt, unsigned long iova, - unsigned long length); +void iommufd_access_notify_unmap(struct io_pagetable *iopt, unsigned long iova, + unsigned long length); int iopt_table_add_domain(struct io_pagetable *iopt, struct iommu_domain *domain); void iopt_table_remove_domain(struct io_pagetable *iopt, diff --git a/drivers/iommu/iommufd/pages.c b/drivers/iommu/iommufd/pages.c index cbdde642d2af..301c232462bd 100644 --- a/drivers/iommu/iommufd/pages.c +++ b/drivers/iommu/iommufd/pages.c @@ -2111,7 +2111,7 @@ iopt_pages_get_exact_access(struct iopt_pages *pages, unsigned long index, */ int iopt_area_add_access(struct iopt_area *area, unsigned long start_index, unsigned long last_index, struct page **out_pages, - unsigned int flags) + unsigned int flags, bool lock_area) { struct iopt_pages *pages = area->pages; struct iopt_pages_access *access; @@ -2124,6 +2124,8 @@ int iopt_area_add_access(struct iopt_area *area, unsigned long start_index, access = iopt_pages_get_exact_access(pages, start_index, last_index); if (access) { area->num_accesses++; + if (lock_area) + area->num_locks++; access->users++; iopt_pages_fill_from_xarray(pages, start_index, last_index, out_pages); @@ -2145,6 +2147,8 @@ int iopt_area_add_access(struct iopt_area *area, unsigned long start_index, access->node.last = last_index; access->users = 1; area->num_accesses++; + if (lock_area) + area->num_locks++; interval_tree_insert(&access->node, &pages->access_itree); mutex_unlock(&pages->mutex); return 0; @@ -2166,7 +2170,7 @@ int iopt_area_add_access(struct iopt_area *area, unsigned long start_index, * must stop using the PFNs before calling this. */ void iopt_area_remove_access(struct iopt_area *area, unsigned long start_index, - unsigned long last_index) + unsigned long last_index, bool unlock_area) { struct iopt_pages *pages = area->pages; struct iopt_pages_access *access; @@ -2177,6 +2181,10 @@ void iopt_area_remove_access(struct iopt_area *area, unsigned long start_index, goto out_unlock; WARN_ON(area->num_accesses == 0 || access->users == 0); + if (unlock_area) { + WARN_ON(area->num_locks == 0); + area->num_locks--; + } area->num_accesses--; access->users--; if (access->users) diff --git a/drivers/iommu/iommufd/viommu.c b/drivers/iommu/iommufd/viommu.c index ce509a827721..00641204efb2 100644 --- a/drivers/iommu/iommufd/viommu.c +++ b/drivers/iommu/iommufd/viommu.c @@ -241,13 +241,20 @@ iommufd_hw_queue_alloc_phys(struct iommu_hw_queue_alloc *cmd, { struct iommufd_access *access; struct page **pages; - int max_npages, i; + size_t max_npages; + size_t length; u64 offset; + size_t i; int rc; offset = cmd->nesting_parent_iova - PAGE_ALIGN(cmd->nesting_parent_iova); - max_npages = DIV_ROUND_UP(offset + cmd->length, PAGE_SIZE); + /* DIV_ROUND_UP(offset + cmd->length, PAGE_SIZE) */ + if (check_add_overflow(offset, cmd->length, &length)) + return ERR_PTR(-ERANGE); + if (check_add_overflow(length, PAGE_SIZE - 1, &length)) + return ERR_PTR(-ERANGE); + max_npages = length / PAGE_SIZE; /* * Use kvcalloc() to avoid memory fragmentation for a large page array. diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 7ab9e3e928b3..e3a0cd47384d 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -112,7 +112,7 @@ struct iommufd_vdevice { /* * Virtual device ID per vIOMMU, e.g. vSID of ARM SMMUv3, vDeviceID of - * AMD IOMMU, and vRID of a nested Intel VT-d to a Context Table + * AMD IOMMU, and vRID of Intel VT-d */ u64 virt_id; diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index a2840beefa8c..111ea81f91a2 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -997,7 +997,7 @@ struct iommu_fault_alloc { * @IOMMU_VIOMMU_TYPE_DEFAULT: Reserved for future use * @IOMMU_VIOMMU_TYPE_ARM_SMMUV3: ARM SMMUv3 driver specific type * @IOMMU_VIOMMU_TYPE_TEGRA241_CMDQV: NVIDIA Tegra241 CMDQV (extension for ARM - * SMMUv3) Virtual Interface (VINTF) + * SMMUv3) enabled ARM SMMUv3 type */ enum iommu_viommu_type { IOMMU_VIOMMU_TYPE_DEFAULT = 0, @@ -1065,7 +1065,7 @@ struct iommu_viommu_alloc { * @dev_id: The physical device to allocate a virtual instance on the vIOMMU * @out_vdevice_id: Object handle for the vDevice. Pass to IOMMU_DESTORY * @virt_id: Virtual device ID per vIOMMU, e.g. vSID of ARM SMMUv3, vDeviceID - * of AMD IOMMU, and vRID of a nested Intel VT-d to a Context Table + * of AMD IOMMU, and vRID of Intel VT-d * * Allocate a virtual device instance (for a physical device) against a vIOMMU. * This instance holds the device's information (related to its vIOMMU) in a VM. diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c index fda93a195e26..9d5b852d5e19 100644 --- a/tools/testing/selftests/iommu/iommufd.c +++ b/tools/testing/selftests/iommu/iommufd.c @@ -2817,33 +2817,31 @@ TEST_F(iommufd_viommu, viommu_alloc_with_data) }; uint32_t *test; - if (self->device_id) { - test_cmd_viommu_alloc(self->device_id, self->hwpt_id, - IOMMU_VIOMMU_TYPE_SELFTEST, &data, - sizeof(data), &self->viommu_id); - ASSERT_EQ(data.out_data, data.in_data); - - /* Negative mmap tests -- offset and length cannot be changed */ - test_err_mmap(ENXIO, data.out_mmap_length, - data.out_mmap_offset + PAGE_SIZE); - test_err_mmap(ENXIO, data.out_mmap_length, - data.out_mmap_offset + PAGE_SIZE * 2); - test_err_mmap(ENXIO, data.out_mmap_length / 2, - data.out_mmap_offset); - test_err_mmap(ENXIO, data.out_mmap_length * 2, - data.out_mmap_offset); - - /* Now do a correct mmap for a loopback test */ - test = mmap(NULL, data.out_mmap_length, PROT_READ | PROT_WRITE, - MAP_SHARED, self->fd, data.out_mmap_offset); - ASSERT_NE(MAP_FAILED, test); - ASSERT_EQ(data.in_data, *test); - - /* The owner of the mmap region should be blocked */ - EXPECT_ERRNO(EBUSY, - _test_ioctl_destroy(self->fd, self->viommu_id)); - munmap(test, data.out_mmap_length); - } + if (!self->device_id) + SKIP(return, "Skipping test for variant no_viommu"); + + test_cmd_viommu_alloc(self->device_id, self->hwpt_id, + IOMMU_VIOMMU_TYPE_SELFTEST, &data, sizeof(data), + &self->viommu_id); + ASSERT_EQ(data.out_data, data.in_data); + + /* Negative mmap tests -- offset and length cannot be changed */ + test_err_mmap(ENXIO, data.out_mmap_length, + data.out_mmap_offset + PAGE_SIZE); + test_err_mmap(ENXIO, data.out_mmap_length, + data.out_mmap_offset + PAGE_SIZE * 2); + test_err_mmap(ENXIO, data.out_mmap_length / 2, data.out_mmap_offset); + test_err_mmap(ENXIO, data.out_mmap_length * 2, data.out_mmap_offset); + + /* Now do a correct mmap for a loopback test */ + test = mmap(NULL, data.out_mmap_length, PROT_READ | PROT_WRITE, + MAP_SHARED, self->fd, data.out_mmap_offset); + ASSERT_NE(MAP_FAILED, test); + ASSERT_EQ(data.in_data, *test); + + /* The owner of the mmap region should be blocked */ + EXPECT_ERRNO(EBUSY, _test_ioctl_destroy(self->fd, self->viommu_id)); + munmap(test, data.out_mmap_length); } TEST_F(iommufd_viommu, vdevice_alloc) @@ -3071,61 +3069,60 @@ TEST_F(iommufd_viommu, vdevice_cache) TEST_F(iommufd_viommu, hw_queue) { + __u64 iova = MOCK_APERTURE_START, iova2; uint32_t viommu_id = self->viommu_id; - __u64 iova = MOCK_APERTURE_START; uint32_t hw_queue_id[2]; - if (viommu_id) { - /* Fail IOMMU_HW_QUEUE_TYPE_DEFAULT */ - test_err_hw_queue_alloc(EOPNOTSUPP, viommu_id, - IOMMU_HW_QUEUE_TYPE_DEFAULT, 0, iova, - PAGE_SIZE, &hw_queue_id[0]); - /* Fail queue addr and length */ - test_err_hw_queue_alloc(EINVAL, viommu_id, - IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, iova, - 0, &hw_queue_id[0]); - test_err_hw_queue_alloc(EOVERFLOW, viommu_id, - IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, - ~(uint64_t)0, PAGE_SIZE, - &hw_queue_id[0]); - /* Fail missing iova */ - test_err_hw_queue_alloc(ENOENT, viommu_id, - IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, iova, - PAGE_SIZE, &hw_queue_id[0]); - - /* Map iova */ - test_ioctl_ioas_map(buffer, PAGE_SIZE, &iova); - - /* Fail index=1 and =MAX; must start from index=0 */ - test_err_hw_queue_alloc(EIO, viommu_id, - IOMMU_HW_QUEUE_TYPE_SELFTEST, 1, iova, - PAGE_SIZE, &hw_queue_id[0]); - test_err_hw_queue_alloc(EINVAL, viommu_id, - IOMMU_HW_QUEUE_TYPE_SELFTEST, - IOMMU_TEST_HW_QUEUE_MAX, iova, - PAGE_SIZE, &hw_queue_id[0]); - - /* Allocate index=0, declare ownership of the iova */ - test_cmd_hw_queue_alloc(viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, - 0, iova, PAGE_SIZE, &hw_queue_id[0]); - /* Fail duplicate */ - test_err_hw_queue_alloc(EEXIST, viommu_id, - IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, iova, - PAGE_SIZE, &hw_queue_id[0]); - /* Fail unmap, due to iova ownership */ - test_err_ioctl_ioas_unmap(EBUSY, iova, PAGE_SIZE); - - /* Allocate index=1 */ - test_cmd_hw_queue_alloc(viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, - 1, iova, PAGE_SIZE, &hw_queue_id[1]); - /* Fail to destroy, due to dependency */ - EXPECT_ERRNO(EBUSY, - _test_ioctl_destroy(self->fd, hw_queue_id[0])); - - /* Destroy in descending order */ - test_ioctl_destroy(hw_queue_id[1]); - test_ioctl_destroy(hw_queue_id[0]); - } + if (!viommu_id) + SKIP(return, "Skipping test for variant no_viommu"); + + /* Fail IOMMU_HW_QUEUE_TYPE_DEFAULT */ + test_err_hw_queue_alloc(EOPNOTSUPP, viommu_id, + IOMMU_HW_QUEUE_TYPE_DEFAULT, 0, iova, PAGE_SIZE, + &hw_queue_id[0]); + /* Fail queue addr and length */ + test_err_hw_queue_alloc(EINVAL, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, + 0, iova, 0, &hw_queue_id[0]); + test_err_hw_queue_alloc(EOVERFLOW, viommu_id, + IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, ~(uint64_t)0, + PAGE_SIZE, &hw_queue_id[0]); + /* Fail missing iova */ + test_err_hw_queue_alloc(ENOENT, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, + 0, iova, PAGE_SIZE, &hw_queue_id[0]); + + /* Map iova */ + test_ioctl_ioas_map(buffer, PAGE_SIZE, &iova); + test_ioctl_ioas_map(buffer + PAGE_SIZE, PAGE_SIZE, &iova2); + + /* Fail index=1 and =MAX; must start from index=0 */ + test_err_hw_queue_alloc(EIO, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, 1, + iova, PAGE_SIZE, &hw_queue_id[0]); + test_err_hw_queue_alloc(EINVAL, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, + IOMMU_TEST_HW_QUEUE_MAX, iova, PAGE_SIZE, + &hw_queue_id[0]); + + /* Allocate index=0, declare ownership of the iova */ + test_cmd_hw_queue_alloc(viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, 0, + iova, PAGE_SIZE, &hw_queue_id[0]); + /* Fail duplicate */ + test_err_hw_queue_alloc(EEXIST, viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, + 0, iova, PAGE_SIZE, &hw_queue_id[0]); + /* Fail unmap, due to iova ownership */ + test_err_ioctl_ioas_unmap(EBUSY, iova, PAGE_SIZE); + /* The 2nd page is not pinned, so it can be unmmap */ + test_ioctl_ioas_unmap(iova + PAGE_SIZE, PAGE_SIZE); + + /* Allocate index=1 */ + test_cmd_hw_queue_alloc(viommu_id, IOMMU_HW_QUEUE_TYPE_SELFTEST, 1, + iova, PAGE_SIZE, &hw_queue_id[1]); + /* Fail to destroy, due to dependency */ + EXPECT_ERRNO(EBUSY, _test_ioctl_destroy(self->fd, hw_queue_id[0])); + + /* Destroy in descending order */ + test_ioctl_destroy(hw_queue_id[1]); + test_ioctl_destroy(hw_queue_id[0]); + /* Now it can unmap the first page */ + test_ioctl_ioas_unmap(iova, PAGE_SIZE); } FIXTURE(iommufd_device_pasid)

6 months

[PATCH v2 00/14] stackleak: Support Clang stack depth tracking

by Kees Cook

v2: - rename stackleak to kstack_erase (mingo) - address __init vs inline with KCOV changes v1: https://lore.kernel.org/lkml/20250507180852.work.231-kees@kernel.org/ RFC: https://lore.kernel.org/lkml/20250502185834.work.560-kees@kernel.org/ Hi, As part of looking at what GCC plugins could be replaced with Clang implementations, this series uses the recently landed stack depth tracking callback in Clang[1] to implement the stackleak feature. Since the Clang feature is now landed, I'm moving this out of RFC to a v1. Since this touches a lot of arch-specific Makefiles, I tried to trim the CC list down to just mailing lists in those cases, otherwise the CC was giant. Thanks! -Kees [1] https://clang.llvm.org/docs/SanitizerCoverage.html#tracing-stack-depth Kees Cook (14): stackleak: Rename STACKLEAK to KSTACK_ERASE stackleak: Rename stackleak_track_stack to __sanitizer_cov_stack_depth stackleak: Split KSTACK_ERASE_CFLAGS from GCC_PLUGINS_CFLAGS x86: Handle KCOV __init vs inline mismatches arm: Handle KCOV __init vs inline mismatches arm64: Handle KCOV __init vs inline mismatches s390: Handle KCOV __init vs inline mismatches powerpc: Handle KCOV __init vs inline mismatches mips: Handle KCOV __init vs inline mismatches loongarch: Handle KCOV __init vs inline mismatches init.h: Disable sanitizer coverage for __init and __head kstack_erase: Support Clang stack depth tracking configs/hardening: Enable CONFIG_KSTACK_ERASE configs/hardening: Enable CONFIG_INIT_ON_FREE_DEFAULT_ON arch/Kconfig | 4 +- arch/arm/Kconfig | 2 +- arch/arm64/Kconfig | 2 +- arch/riscv/Kconfig | 2 +- arch/s390/Kconfig | 2 +- arch/x86/Kconfig | 2 +- security/Kconfig.hardening | 45 +++++++++------- Makefile | 1 + arch/arm/boot/compressed/Makefile | 2 +- arch/arm/vdso/Makefile | 2 +- arch/arm64/kernel/pi/Makefile | 2 +- arch/arm64/kernel/vdso/Makefile | 3 +- arch/arm64/kvm/hyp/nvhe/Makefile | 2 +- arch/riscv/kernel/pi/Makefile | 2 +- arch/riscv/purgatory/Makefile | 2 +- arch/sparc/vdso/Makefile | 3 +- arch/x86/entry/vdso/Makefile | 3 +- arch/x86/purgatory/Makefile | 2 +- drivers/firmware/efi/libstub/Makefile | 8 +-- drivers/misc/lkdtm/Makefile | 2 +- kernel/Makefile | 10 ++-- lib/Makefile | 2 +- scripts/Makefile.gcc-plugins | 16 +----- scripts/Makefile.kstack_erase | 21 ++++++++ scripts/gcc-plugins/stackleak_plugin.c | 52 +++++++++---------- Documentation/admin-guide/sysctl/kernel.rst | 4 +- Documentation/arch/x86/x86_64/mm.rst | 2 +- Documentation/security/self-protection.rst | 2 +- .../zh_CN/security/self-protection.rst | 2 +- arch/arm64/include/asm/acpi.h | 2 +- arch/loongarch/include/asm/smp.h | 2 +- arch/mips/include/asm/time.h | 2 +- arch/s390/hypfs/hypfs.h | 2 +- arch/s390/hypfs/hypfs_diag.h | 2 +- arch/x86/entry/calling.h | 4 +- arch/x86/include/asm/acpi.h | 4 +- arch/x86/include/asm/init.h | 2 +- arch/x86/include/asm/realmode.h | 2 +- include/linux/acpi.h | 4 +- include/linux/bootconfig.h | 2 +- include/linux/efi.h | 2 +- include/linux/init.h | 4 +- include/linux/{stackleak.h => kstack_erase.h} | 20 +++---- include/linux/memblock.h | 2 +- include/linux/mfd/dbx500-prcmu.h | 2 +- include/linux/sched.h | 4 +- arch/arm/kernel/entry-common.S | 2 +- arch/arm64/kernel/entry.S | 2 +- arch/riscv/kernel/entry.S | 2 +- arch/s390/kernel/entry.S | 2 +- arch/arm/mm/cache-feroceon-l2.c | 2 +- arch/arm/mm/cache-tauros2.c | 2 +- arch/loongarch/kernel/time.c | 2 +- arch/loongarch/mm/ioremap.c | 4 +- arch/powerpc/mm/book3s64/hash_utils.c | 2 +- arch/powerpc/mm/book3s64/radix_pgtable.c | 2 +- arch/s390/mm/init.c | 2 +- arch/x86/kernel/kvm.c | 2 +- drivers/clocksource/timer-orion.c | 2 +- .../lkdtm/{stackleak.c => kstack_erase.c} | 26 +++++----- drivers/platform/x86/thinkpad_acpi.c | 4 +- drivers/soc/ti/pm33xx.c | 2 +- fs/proc/base.c | 6 +-- kernel/fork.c | 2 +- kernel/{stackleak.c => kstack_erase.c} | 22 ++++---- tools/objtool/check.c | 4 +- tools/testing/selftests/lkdtm/config | 2 +- MAINTAINERS | 6 ++- kernel/configs/hardening.config | 6 +++ 69 files changed, 203 insertions(+), 171 deletions(-) create mode 100644 scripts/Makefile.kstack_erase rename include/linux/{stackleak.h => kstack_erase.h} (81%) rename drivers/misc/lkdtm/{stackleak.c => kstack_erase.c} (89%) rename kernel/{stackleak.c => kstack_erase.c} (87%) -- 2.34.1

6 months

[PATCH v21 net-next 0/6] DUALPI2 patch

by chia-yu.chang＠nokia-bell-labs.com

From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> Hello, Please find the DualPI2 patch v21. This patch serise adds DualPI Improved with a Square (DualPI2) with following features: * Supports congestion controls that comply with the Prague requirements in RFC9331 (e.g. TCP-Prague) * Coupled dual-queue that separates the L4S traffic in a low latency queue (L-queue), without harming remaining traffic that is scheduled in classic queue (C-queue) due to congestion-coupling using PI2 as defined in RFC9332 * Configurable overload strategies * Use of sojourn time to reliably estimate queue delay * Supports ECN L4S-identifier (IP.ECN==0b*1) to classify traffic into respective queues For more details of DualPI2, please refer IETF RFC9332 (https://datatracker.ietf.org/doc/html/rfc9332). Best regards, Chia-Yu --- v21 (02-Jul-2025) - Replace STEP_THRESH and STEP_PACKETS with STEP_THRESH_PKTS and STEP_THRESH_US (Jakub Kicinski <kuba(a)kernel.org>) - Move READ_ONCE and WRITE_ONCE to later DualPI2 patches (Jakub Kicinski <kuba(a)kernel.org>) - Replace NLA_POLICY_FULL_RANGE with NLA_POLICY_RANGE (Jakub Kicinski <kuba(a)kernel.org>) - Set extra error message for dualpi2_change (Jakub Kicinski <kuba(a)kernel.org>) - Drop redundant else for better readability (Paolo Abeni <pabeni(a)redhat.com>) - Replace step-thresh and step-packets with step-thresh-pkts and step-thresh-us (Jakub Kicinski <kuba(a)kernel.org>) - Remove redundant name-prefix and simplify entries of dualpi2 enums (Jakub Kicinski <kuba(a)kernel.org>) - Fix some typos and format issues of dualpi2 attributes v20 (21-Jun-2025) - Add one more commit to fix warning and style check on tdc.sh reported by shellcheck - Remove double-prefixed of "tc_tc_dualpi2_attrs" in tc-user.h (Donald Hunter <donald.hunter(a)gmail.com>) v19 (14-Jun-2025) - Fix one typo in the comment of #1 (ALOK TIWARI <alok.a.tiwari(a)oracle.com>) - Update commit message of #4 (ALOK TIWARI <alok.a.tiwari(a)oracle.com>) - Wrap long lines of Documentation/netlink/specs/tc.yaml to within 80 characters (Jakub Kicinski <kuba(a)kernel.org>) v18 (13-Jun-2025) - Add the num of enum used by DualPI2 and fix name and name-prefix of DualPI2 enum and attribute - Replace from_timer() with timer_container_of() (Pedro Tammela <pctammela(a)mojatatu.com>) v17 (25-May-2025, Resent at 11-Jun-2025) - Replace 0xffffffff with U32_MAX (Paolo Abeni <pabeni(a)redhat.com>) - Use helper function qdisc_dequeue_internal() and add new helper function skb_apply_step() (Paolo Abeni <pabeni(a)redhat.com>) - Add s64 casting when calculating the delta of the PI controller (Paolo Abeni <pabeni(a)redhat.com>) - Change the drop reason into SKB_DROP_REASON_QDISC_CONGESTED for drop_early (Paolo Abeni <pabeni(a)redhat.com>) - Modify the condition to remove the original skb when enqueuing multiple GSO segments (Paolo Abeni <pabeni(a)redhat.com>) - Add READ_ONCE() in dualpi2_dump_stat() (Paolo Abeni <pabeni(a)redhat.com>) - Add comments, brackets, and brackets for readability (Paolo Abeni <pabeni(a)redhat.com>) v16 (16-MAy-2025) - Add qdisc_lock() to dualpi2_timer() in dualpi2_timer (Paolo Abeni <pabeni(a)redhat.com>) - Introduce convert_ns_to_usec() to convert usec to nsec without overflow in #1 (Paolo Abeni <pabeni(a)redhat.com>) - Update convert_us_tonsec() to convert nsec to usec without overflow in #2 (Paolo Abeni <pabeni(a)redhat.com>) - Add more descriptions with respect to DualPI2 in the cover ltter and add changelog in each patch (Paolo Abeni <pabeni(a)redhat.com>) v15 (09-May-2025) - Add enum of TCA_DUALPI2_ECN_MASK_CLA_ECT to remove potential leakeage in #1 (Simon Horman <horms(a)kernel.org>) - Fix one typo in comment of #2 - Update tc.yaml in #5 to aligh with the updated enum of pkt_sched.h v14 (05-May-2025) - Modify tc.yaml: (1) Replace flags with enum and remove enum-as-flags, (2) Remove credit-queue in xstats, and (3) Change attribute types (Donald Hunter <donald.hun - Add enum and fix the ordering of variables in pkt_sched.h to align with the modified tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Add validators for DROP_OVERLOAD, DROP_EARLY, ECN_MASK, and SPLIT_GSO in sch_dualpi2.c (Donald Hunter <donald.hunter(a)gmail.com>) - Update dualpi2.json to align with the updated variable order in pkt_sched.h - Reorder patches (Donald Hunter <donald.hunter(a)gmail.com>) v13 (26-Apr-2025) - Use dashes in member names to follow YNL conventions in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Define enumerations separately for flags of drop-early, drop-overload, ecn-mask, credit-queue in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Change the types of split-gso and step-packets into flag in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Revert to u32/u8 types for tc-dualpi2-xstats members in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Add new test cases in tc-tests/qdiscs/dualpi2.json to cover all dualpi2 parameters (Donald Hunter <donald.hunter(a)gmail.com>) - Change the type of TCA_DUALPI2_STEP_PACKETS into NLA_FLAG (Donald Hunter <donald.hunter(a)gmail.com>) v12 (22-Apr-2025) - Remove anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>) - Replace u32/u8 with uint and s32 with int in tc spec document (Paolo Abeni <pabeni(a)redhat.com>) - Introduce get_memory_limit function to handle potential overflow when multipling limit with MTU (Paolo Abeni <pabeni(a)redhat.com>) - Double the packet length to further include packet overhead in memory_limit (Paolo Abeni <pabeni(a)redhat.com>) - Remove the check of qdisc_qlen(sch) when calling qdisc_tree_reduce_backlog (Paolo Abeni <pabeni(a)redhat.com>) v11 (15-Apr-2025) - Replace hstimer_init with hstimer_setup in sch_dualpi2.c v10 (25-Mar-2025) - Remove leftover include in include/linux/netdevice.h and anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>) - Use kfree_skb_reason() and add SKB_DROP_REASON_DUALPI2_STEP_DROP drop reason (Paolo Abeni <pabeni(a)redhat.com>) - Split sch_dualpi2.c into 3 patches (and overall 5 patches): Struct definition & parsing, Dump stats & configuration, Enqueue/Dequeue (Paolo Abeni <pabeni(a)redhat.com>) v9 (16-Mar-2025) - Fix mem_usage error in previous version - Add min_qlen_step to the dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step threshold marking. In previous versions, this value was fixed to 2, so the step threshold was applied to mark packets in the L queue only when the queue length of the L queue was greater than or equal to 2 packets. This will cause larger queuing delays for L4S traffic at low rates (<20Mbps). So we parameterize it and change the default value to 0. Comparison of tcp_1down run 'HTB 20Mbit + DUALPI2 + 10ms base delay' Old versions: avg median # data pts Ping (ms) ICMP : 11.55 11.70 ms 350 TCP upload avg : 18.96 N/A Mbits/s 350 TCP upload sum : 18.96 N/A Mbits/s 350 New version (v9): avg median # data pts Ping (ms) ICMP : 10.81 10.70 ms 350 TCP upload avg : 18.91 N/A Mbits/s 350 TCP upload sum : 18.91 N/A Mbits/s 350 Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay' Old versions: avg median # data pts Ping (ms) ICMP : 12.61 12.80 ms 350 TCP upload avg : 9.48 N/A Mbits/s 350 TCP upload sum : 9.48 N/A Mbits/s 350 New version (v9): avg median # data pts Ping (ms) ICMP : 11.06 10.80 ms 350 TCP upload avg : 9.43 N/A Mbits/s 350 TCP upload sum : 9.43 N/A Mbits/s 350 Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay' Old versions: avg median # data pts Ping (ms) ICMP : 40.86 37.45 ms 350 TCP upload avg : 0.88 N/A Mbits/s 350 TCP upload sum : 0.88 N/A Mbits/s 350 TCP upload::1 : 0.88 0.97 Mbits/s 350 New version (v9): avg median # data pts Ping (ms) ICMP : 11.07 10.40 ms 350 TCP upload avg : 0.55 N/A Mbits/s 350 TCP upload sum : 0.55 N/A Mbits/s 350 TCP upload::1 : 0.55 0.59 Mbits/s 350 v8 (11-Mar-2025) - Fix warning messages in v7 v7 (07-Mar-2025) - Separate into 3 patches to avoid mixing changes of documentation, selftest, and code. (Cong Wang <xiyou.wangcong(a)gmail.com>) v6 (04-Mar-2025) - Add modprobe for dulapi2 in tc-testing script tc-testing/tdc.sh (Jakub Kicinski <kuba(a)kernel.org>) - Update test cases in dualpi2.json - Update commit message v5 (22-Feb-2025) - A comparison was done between MQ + DUALPI2, MQ + FQ_PIE, MQ + FQ_CODEL: Unshaped 1gigE with 4 download streams test: - Summary of tcp_4down run 'MQ + FQ_CODEL': avg median # data pts Ping (ms) ICMP : 1.19 1.34 ms 349 TCP download avg : 235.42 N/A Mbits/s 349 TCP download sum : 941.68 N/A Mbits/s 349 TCP download::1 : 235.19 235.39 Mbits/s 349 TCP download::2 : 235.03 235.35 Mbits/s 349 TCP download::3 : 236.89 235.44 Mbits/s 349 TCP download::4 : 234.57 235.19 Mbits/s 349 - Summary of tcp_4down run 'MQ + FQ_PIE' avg median # data pts Ping (ms) ICMP : 1.21 1.37 ms 350 TCP download avg : 235.42 N/A Mbits/s 350 TCP download sum : 941.61 N/A Mbits/s 350 TCP download::1 : 232.54 233.13 Mbits/s 350 TCP download::2 : 232.52 232.80 Mbits/s 350 TCP download::3 : 233.14 233.78 Mbits/s 350 TCP download::4 : 243.41 241.48 Mbits/s 350 - Summary of tcp_4down run 'MQ + DUALPI2' avg median # data pts Ping (ms) ICMP : 1.19 1.34 ms 349 TCP download avg : 235.42 N/A Mbits/s 349 TCP download sum : 941.68 N/A Mbits/s 349 TCP download::1 : 235.19 235.39 Mbits/s 349 TCP download::2 : 235.03 235.35 Mbits/s 349 TCP download::3 : 236.89 235.44 Mbits/s 349 TCP download::4 : 234.57 235.19 Mbits/s 349 Unshaped 1gigE with 128 download streams test: - Summary of tcp_128down run 'MQ + FQ_CODEL': avg median # data pts Ping (ms) ICMP : 1.88 1.86 ms 350 TCP download avg : 7.39 N/A Mbits/s 350 TCP download sum : 946.47 N/A Mbits/s 350 - Summary of tcp_128down run 'MQ + FQ_PIE': avg median # data pts Ping (ms) ICMP : 1.88 1.86 ms 350 TCP download avg : 7.39 N/A Mbits/s 350 TCP download sum : 946.47 N/A Mbits/s 350 - Summary of tcp_128down run 'MQ + DUALPI2': avg median # data pts Ping (ms) ICMP : 1.88 1.86 ms 350 TCP download avg : 7.39 N/A Mbits/s 350 TCP download sum : 946.47 N/A Mbits/s 350 Unshaped 10gigE with 4 download streams test: - Summary of tcp_4down run 'MQ + FQ_CODEL': avg median # data pts Ping (ms) ICMP : 0.22 0.23 ms 350 TCP download avg : 2354.08 N/A Mbits/s 350 TCP download sum : 9416.31 N/A Mbits/s 350 TCP download::1 : 2353.65 2352.81 Mbits/s 350 TCP download::2 : 2354.54 2354.21 Mbits/s 350 TCP download::3 : 2353.56 2353.78 Mbits/s 350 TCP download::4 : 2354.56 2354.45 Mbits/s 350 - Summary of tcp_4down run 'MQ + FQ_PIE': avg median # data pts Ping (ms) ICMP : 0.20 0.19 ms 350 TCP download avg : 2354.76 N/A Mbits/s 350 TCP download sum : 9419.04 N/A Mbits/s 350 TCP download::1 : 2354.77 2353.89 Mbits/s 350 TCP download::2 : 2353.41 2354.29 Mbits/s 350 TCP download::3 : 2356.18 2354.19 Mbits/s 350 TCP download::4 : 2354.68 2353.15 Mbits/s 350 - Summary of tcp_4down run 'MQ + DUALPI2': avg median # data pts Ping (ms) ICMP : 0.24 0.24 ms 350 TCP download avg : 2354.11 N/A Mbits/s 350 TCP download sum : 9416.43 N/A Mbits/s 350 TCP download::1 : 2354.75 2353.93 Mbits/s 350 TCP download::2 : 2353.15 2353.75 Mbits/s 350 TCP download::3 : 2353.49 2353.72 Mbits/s 350 TCP download::4 : 2355.04 2353.73 Mbits/s 350 Unshaped 10gigE with 128 download streams test: - Summary of tcp_128down run 'MQ + FQ_CODEL': avg median # data pts Ping (ms) ICMP : 7.57 8.69 ms 350 TCP download avg : 73.97 N/A Mbits/s 350 TCP download sum : 9467.82 N/A Mbits/s 350 - Summary of tcp_128down run 'MQ + FQ_PIE': avg median # data pts Ping (ms) ICMP : 7.82 8.91 ms 350 TCP download avg : 73.97 N/A Mbits/s 350 TCP download sum : 9468.42 N/A Mbits/s 350 - Summary of tcp_128down run 'MQ + DUALPI2': avg median # data pts Ping (ms) ICMP : 6.87 7.93 ms 350 TCP download avg : 73.95 N/A Mbits/s 350 TCP download sum : 9465.87 N/A Mbits/s 350 From the results shown above, we see small differences between combinations. - Update commit message to include results of no_split_gso and split_gso (Dave Taht <dave.taht(a)gmail.com> and Paolo Abeni <pabeni(a)redhat.com>) - Add memlimit in the dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>) - Update note in sch_dualpi2.c related to BBRv3 status (Dave Taht <dave.taht(a)gmail.com>) - Update license identifier (Dave Taht <dave.taht(a)gmail.com>) - Add selftest in tools/testing/selftests/tc-testing (Cong Wang <xiyou.wangcong(a)gmail.com>) - Use netlink policies for parameter checks (Jamal Hadi Salim <jhs(a)mojatatu.com>) - Modify texts & fix typos in Documentation/netlink/specs/tc.yaml (Dave Taht <dave.taht(a)gmail.com>) - Add descriptions of packet counter statistics and the reset function of sch_dualpi2.c - Fix step_thresh in packets - Update code comments in sch_dualpi2.c v4 (22-Oct-2024) - Update statement in Kconfig for DualPI2 (Stephen Hemminger <stephen(a)networkplumber.org>) - Put a blank line after #define in sch_dualpi2.c (Stephen Hemminger <stephen(a)networkplumber.org>) - Fix line length warning. v3 (19-Oct-2024) - Fix compilaiton error - Update Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>) v2 (18-Oct-2024) - Add Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>) - Use dualpi2 instead of skb prefix (Jamal Hadi Salim <jhs(a)mojatatu.com>) - Replace nla_parse_nested_deprecated with nla_parse_nested (Jamal Hadi Salim <jhs(a)mojatatu.com>) - Fix line length warning --- Chia-Yu Chang (5): sched: Struct definition and parsing of dualpi2 qdisc sched: Dump configuration and statistics of dualpi2 qdisc selftests/tc-testing: Fix warning and style check on tdc.sh selftests/tc-testing: Add selftests for qdisc DualPI2 Documentation: netlink: specs: tc: Add DualPI2 specification Koen De Schepper (1): sched: Add enqueue/dequeue of dualpi2 qdisc Documentation/netlink/specs/tc.yaml | 151 ++- include/net/dropreason-core.h | 6 + include/uapi/linux/pkt_sched.h | 68 + net/sched/Kconfig | 12 + net/sched/Makefile | 1 + net/sched/sch_dualpi2.c | 1171 +++++++++++++++++ tools/testing/selftests/tc-testing/config | 1 + .../tc-testing/tc-tests/qdiscs/dualpi2.json | 254 ++++ tools/testing/selftests/tc-testing/tdc.sh | 6 +- 9 files changed, 1665 insertions(+), 5 deletions(-) create mode 100644 net/sched/sch_dualpi2.c create mode 100644 tools/testing/selftests/tc-testing/tc-tests/qdiscs/dualpi2.json -- 2.34.1

6 months

[PATCH net] selftests: drv-net: rss_ctx: Add short delay between per-context traffic checks

by Nimrod Oren

A few packets may still be sent and received during the termination of the iperf processes. These late packets cause failures when they arrive on queues expected to be empty. Add a one second delay between repeated _send_traffic_check() calls in rss_ctx tests to ensure such packets are processed before the next traffic checks are performed. Example failure observed: Check failed 2 != 0 traffic on inactive queues (context 1): [0, 0, 1, 1, 386385, 397196, 0, 0, 0, 0, ...] Check failed 4 != 0 traffic on inactive queues (context 2): [0, 0, 0, 0, 2, 2, 247152, 253013, 0, 0, ...] Check failed 2 != 0 traffic on inactive queues (context 3): [0, 0, 0, 0, 0, 0, 1, 1, 282434, 283070, ...] Note: While the `noise` parameter could be used to tolerate these late packets, it would be inappropriate here. `noise` tolerates far more traffic than acceptable in this case, risking false positives. Inactive queues are supposed to see zero traffic. Fixes: 847aa551fa78 ("selftests: drv-net: rss_ctx: factor out send traffic and check") Reviewed-by: Gal Pressman <gal(a)nvidia.com> Reviewed-by: Carolina Jubran <cjubran(a)nvidia.com> Signed-off-by: Nimrod Oren <noren(a)nvidia.com> --- tools/testing/selftests/drivers/net/hw/rss_ctx.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/drivers/net/hw/rss_ctx.py b/tools/testing/selftests/drivers/net/hw/rss_ctx.py index 7bb552f8b182..19be69227693 100755 --- a/tools/testing/selftests/drivers/net/hw/rss_ctx.py +++ b/tools/testing/selftests/drivers/net/hw/rss_ctx.py @@ -4,6 +4,7 @@ import datetime import random import re +import time from lib.py import ksft_run, ksft_pr, ksft_exit from lib.py import ksft_eq, ksft_ne, ksft_ge, ksft_in, ksft_lt, ksft_true, ksft_raises from lib.py import NetDrvEpEnv @@ -492,6 +493,7 @@ def test_rss_context(cfg, ctx_cnt=1, create_with_cfg=None): { 'target': (2+i*2, 3+i*2), 'noise': (0, 1), 'empty': list(range(2, 2+i*2)) + list(range(4+i*2, 2+2*ctx_cnt)) }) + time.sleep(1) if requested_ctx_cnt != ctx_cnt: raise KsftSkipEx(f"Tested only {ctx_cnt} contexts, wanted {requested_ctx_cnt}") @@ -559,6 +561,7 @@ def test_rss_context_out_of_order(cfg, ctx_cnt=4): } _send_traffic_check(cfg, ports[i], f"context {i}", expected) + time.sleep(1) # Use queues 0 and 1 for normal traffic ethtool(f"-X {cfg.ifname} equal 2") -- 2.37.1

6 months

Re: [PATCH v2 1/2] selftests: cachestat: add tests for mmap

by Joshua Hahn

On Tue, 8 Jul 2025 23:13:01 +0530 Suresh Chandrappa <suresh.k.chandrappa(a)gmail.com> wrote: > Hi Joshua, > > Thanks for the feedback! In the first patch, both shmem and mmap operations > are present, but I hadn’t introduced any logic to distinguish between them > yet. That distinction is added in the second patch through a new API. Hi Suresh, Yes, this makes sense to me. I think what I was getting at was that we could still make a conditional statement like if (type == FILE_SHMEM) ksft_print_msg("Unable to create shmem file.\n")' else if (type == FILE_MMAP) ksft_print_msg("Unable to create mmap file.\n"); (or use a switch statement) ... And just refactor it in patch 2, as opposed to changing the behavior. But this is mostly a nit. If you are planning to merge both patches in one patch in the next version, then all of these comments shouldn't matter : -) Looking forward to the next version, have a great day! Joshua Sent using hkml (https://github.com/sjp38/hackermail)

6 months

[kvm-unit-tests PATCH v3 1/2] lib: Add STR_IS_Y and STR_IS_N for checking env vars

by Jesse Taube

the line: (s && (*s == '1' || *s == 'y' || *s == 'Y')) is used in a few places add a macro for it and its 'n' counterpart. Add a copy of Linux's IS_ENABLED macro to be used in GET_ENV_OR_CONFIG. Add GET_ENV_OR_CONFIG for CONFIG values which can be overridden by the environment. Signed-off-by: Jesse Taube <jesse(a)rivosinc.com> --- V1 -> V2: - New commit V2 -> V3: - Add IS_ENABLED so CONFIG_##name can be undefined - Change GET_ENV_OR_CONFIG to GET_CONFIG_OR_ENV - Fix it's to its --- lib/argv.h | 38 ++++++++++++++++++++++++++++++++++++++ lib/errata.h | 7 ++++--- riscv/sbi-tests.h | 3 ++- 3 files changed, 44 insertions(+), 4 deletions(-) diff --git a/lib/argv.h b/lib/argv.h index 0fa77725..111af078 100644 --- a/lib/argv.h +++ b/lib/argv.h @@ -14,4 +14,42 @@ extern void setup_args_progname(const char *args); extern void setup_env(char *env, int size); extern void add_setup_arg(const char *arg); +/* + * Helper macros to use CONFIG_ options in C/CPP expressions. Note that + * these only work with boolean and tristate options. + */ + +/* + * Getting something that works in C and CPP for an arg that may or may + * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1" + * we match on the placeholder define, insert the "0," for arg1 and generate + * the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one). + * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when + * the last step cherry picks the 2nd arg, we get a zero. + */ +#define __ARG_PLACEHOLDER_1 0, +#define __take_second_arg(__ignored, val, ...) val +#define __is_defined(x) ___is_defined(x) +#define ___is_defined(val) ____is_defined(__ARG_PLACEHOLDER_##val) +#define ____is_defined(arg1_or_junk) __take_second_arg(arg1_or_junk 1, 0) + +/* + * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to '1', 0 + * otherwise. + */ +#define IS_ENABLED(option) __is_defined(option) + +#define STR_IS_Y(s) (s && (*s == '1' || *s == 'y' || *s == 'Y')) +#define STR_IS_N(s) (s && (*s == '0' || *s == 'n' || *s == 'N')) + +/* + * Get the boolean value of CONFIG_{name} + * which can be overridden by the {name} + * variable in the environment if present. + */ +#define GET_ENV_OR_CONFIG(name) ({ \ + const char *genv_s = getenv(#name); \ + genv_s ? STR_IS_Y(genv_s) : IS_ENABLED(CONFIG_##name); \ +}) + #endif diff --git a/lib/errata.h b/lib/errata.h index de8205d8..78007243 100644 --- a/lib/errata.h +++ b/lib/errata.h @@ -7,6 +7,7 @@ #ifndef _ERRATA_H_ #define _ERRATA_H_ #include <libcflat.h> +#include <argv.h> #include "config.h" @@ -28,7 +29,7 @@ static inline bool errata_force(void) return true; s = getenv("ERRATA_FORCE"); - return s && (*s == '1' || *s == 'y' || *s == 'Y'); + return STR_IS_Y(s); } static inline bool errata(const char *erratum) @@ -40,7 +41,7 @@ static inline bool errata(const char *erratum) s = getenv(erratum); - return s && (*s == '1' || *s == 'y' || *s == 'Y'); + return STR_IS_Y(s); } static inline bool errata_relaxed(const char *erratum) @@ -52,7 +53,7 @@ static inline bool errata_relaxed(const char *erratum) s = getenv(erratum); - return !(s && (*s == '0' || *s == 'n' || *s == 'N')); + return !STR_IS_N(s); } #endif diff --git a/riscv/sbi-tests.h b/riscv/sbi-tests.h index c1ebf016..4e051dca 100644 --- a/riscv/sbi-tests.h +++ b/riscv/sbi-tests.h @@ -37,6 +37,7 @@ #ifndef __ASSEMBLER__ #include <libcflat.h> +#include <argv.h> #include <asm/sbi.h> #define __sbiret_report(kfail, ret, expected_error, expected_value, \ @@ -94,7 +95,7 @@ static inline bool env_enabled(const char *env) { char *s = getenv(env); - return s && (*s == '1' || *s == 'y' || *s == 'Y'); + return STR_IS_Y(s); } void split_phys_addr(phys_addr_t paddr, unsigned long *hi, unsigned long *lo); -- 2.43.0

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