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[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

6 months

[PATCH] selftests/filesystems: Multiple declaration of __kernel_fsid_t

by Alessandro Zanni

Fix to remove a multiple declaration of the struct __kernel_fsid_t, which is already declared in posix_types.h, to solve the following errors: - mount-notify_test.c:22:3: error: conflicting types for ‘__kernel_fsid_t’; have ‘struct <anonymous>’ 22 | } __kernel_fsid_t; - usr/include/asm-generic/posix_types.h:81:3: note: previous declaration of ‘__kernel_fsid_t’ with type ‘__kernel_fsid_t’ 81 | } __kernel_fsid_t; To reproduce the issue, use the command: make kselftest TARGET=filesystems/statmount Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- .../selftests/filesystems/mount-notify/mount-notify_test.c | 7 ------- .../filesystems/mount-notify/mount-notify_test_ns.c | 7 ------- 2 files changed, 14 deletions(-) diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c index 63ce708d93ed..5a3b0ace1a88 100644 --- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c +++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c @@ -15,13 +15,6 @@ #include "../statmount/statmount.h" #include "../utils.h" -// Needed for linux/fanotify.h -#ifndef __kernel_fsid_t -typedef struct { - int val[2]; -} __kernel_fsid_t; -#endif - #include <sys/fanotify.h> static const char root_mntpoint_templ[] = "/tmp/mount-notify_test_root.XXXXXX"; diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c index 090a5ca65004..d91946e69591 100644 --- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c +++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c @@ -16,13 +16,6 @@ #include "../statmount/statmount.h" #include "../utils.h" -// Needed for linux/fanotify.h -#ifndef __kernel_fsid_t -typedef struct { - int val[2]; -} __kernel_fsid_t; -#endif - #include <sys/fanotify.h> static const char root_mntpoint_templ[] = "/tmp/mount-notify_test_root.XXXXXX"; -- 2.43.0

6 months

[PATCH net-next v2 0/3] netdevsim: add support for PHY devices

by Maxime Chevallier

Hi everyone, Here's a V2 for the netdevsim PHY support, including a bugfix for NETDEVSIM=m as well as a round of shellcheck cleanups for ethtool-phy.sh. The idea of this series is to allow attaching virtual PHY devices to netdevsim, so that we can test PHY-related ethtool commands. This can be extended in the future for phylib testing as well. V1: https://lore.kernel.org/netdev/20250702082806.706973-1-maxime.chevallier@bo… Maxime Chevallier (3): net: netdevsim: Add PHY support in netdevsim selftests: ethtool: Drop the unused old_netdevs variable selftests: ethtool: Introduce ethernet PHY selftests on netdevsim drivers/net/netdevsim/Makefile | 4 + drivers/net/netdevsim/dev.c | 2 + drivers/net/netdevsim/netdev.c | 8 + drivers/net/netdevsim/netdevsim.h | 25 ++ drivers/net/netdevsim/phy.c | 398 ++++++++++++++++++ .../selftests/drivers/net/netdevsim/config | 1 + .../drivers/net/netdevsim/ethtool-common.sh | 19 +- .../drivers/net/netdevsim/ethtool-phy.sh | 64 +++ 8 files changed, 518 insertions(+), 3 deletions(-) create mode 100644 drivers/net/netdevsim/phy.c create mode 100755 tools/testing/selftests/drivers/net/netdevsim/ethtool-phy.sh -- 2.49.0

6 months

[PATCH v19 00/10] PCI: EP: Add RC-to-EP doorbell with platform MSI controller

by Frank Li

┌────────────┐ ┌───────────────────────────────────┐ ┌────────────────┐ │ │ │ │ │ │ │ │ │ PCI Endpoint │ │ PCI Host │ │ │ │ │ │ │ │ │◄──┤ 1.platform_msi_domain_alloc_irqs()│ │ │ │ │ │ │ │ │ │ MSI ├──►│ 2.write_msi_msg() ├──►├─BAR<n> │ │ Controller │ │ update doorbell register address│ │ │ │ │ │ for BAR │ │ │ │ │ │ │ │ 3. Write BAR<n>│ │ │◄──┼───────────────────────────────────┼───┤ │ │ │ │ │ │ │ │ ├──►│ 4.Irq Handle │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ └────────────┘ └───────────────────────────────────┘ └────────────────┘ This patches based on old https://lore.kernel.org/imx/20221124055036.1630573-1-Frank.Li@nxp.com/ Original patch only target to vntb driver. But actually it is common method. This patches add new API to pci-epf-core, so any EP driver can use it. Previous v2 discussion here. https://lore.kernel.org/imx/20230911220920.1817033-1-Frank.Li@nxp.com/ Changes in v19: - irq part already in v6.16-rc1, only missed pcie/dts part - rebase to v6.16-rc1 - update commit message for patch IMMUTABLE check. - Link to v18: https://lore.kernel.org/r/20250414-ep-msi-v18-0-f69b49917464@nxp.com Changes in v18: - pci-ep.yaml: sort property order, fix maxvalue to 0x7ffff for msi-map-mask and iommu-map-mask - Link to v17: https://lore.kernel.org/r/20250407-ep-msi-v17-0-633ab45a31d0@nxp.com Changes in v17: - move document part to pci-ep.yaml - Link to v16: https://lore.kernel.org/r/20250404-ep-msi-v16-0-d4919d68c0d0@nxp.com Changes in v16: - remove arm64: dts: imx95-19x19-evk: Add PCIe1 endpoint function overlay file because there are better patches, which under review. - Add document for pcie-ep msi-map usage - other change to see each patch's change log About IMMUTABLE (No change for this part, tglx provide feedback) > - This IMMUTABLE thing serves no purpose, because you don't randomly > plug this end-point block on any MSI controller. They come as part > of an SoC. "Yes and no. The problem is that the EP implementation is meant to be a generic library and while GIC-ITS guarantees immutability of the address/data pair after setup, there are architectures (x86, loongson, riscv) where the base MSI controller does not and immutability is only achieved when interrupt remapping is enabled. The latter can be disabled at boot-time and then the EP implementation becomes a lottery across affinity changes. That was my concern about this library implementation and that's why I asked for a mechanism to ensure that the underlying irqdomain provides a immutable address/data pair. So it does not matter for GIC-ITS, but in the larger picture it matters. Thanks, tglx " So it does not matter for GIC-ITS, but in the larger picture it matters. - Link to v15: https://lore.kernel.org/r/20250211-ep-msi-v15-0-bcacc1f2b1a9@nxp.com Changes in v15: - rebase to v6.14-rc1 - fix build issue find by kernel test robot - Link to v14: https://lore.kernel.org/r/20250207-ep-msi-v14-0-9671b136f2b8@nxp.com Changes in v14: Marc Zyngier raised concerns about adding DOMAIN_BUS_DEVICE_PCI_EP_MSI. As a result, the approach has been reverted to the v9 method. However, there are several improvements: MSI now supports msi-map in addition to msi-parent. - The struct device: id is used as the endpoint function (EPF) device identity to map to the stream ID (sideband information). - The EPC device tree source (DTS) utilizes msi-map to provide such information. - The EPF device's of_node is set to the EPC controller’s node. This approach is commonly used for multi-function device (MFD) platform child devices, allowing them to inherit properties from the MFD device’s DTS, such as reset-cells and gpio-cells. This method is well-suited for the current case, as the EPF is inherently created/binded to the EPC and should inherit the EPC’s DTS node properties. Additionally: Since the basic IMX95 LUT support has already been merged into the mainline, a DTS and driver increment patch is added to complete the solution. The patch is rebased onto the latest linux-next tree and aligned with the new pcitest framework. - Link to v13: https://lore.kernel.org/r/20241218-ep-msi-v13-0-646e2192dc24@nxp.com Changes in v13: - Change to use DOMAIN_BUS_PCI_DEVICE_EP_MSI - Change request id as func | vfunc << 3 - Remove IRQ_DOMAIN_MSI_IMMUTABLE Thomas Gleixner: I hope capture all your points in review comments. If missed, let me know. - Link to v12: https://lore.kernel.org/r/20241211-ep-msi-v12-0-33d4532fa520@nxp.com Changes in v12: - Change to use IRQ_DOMAIN_MSI_IMMUTABLE and add help function irq_domain_msi_is_immuatble(). - split PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check to 3 patches - Link to v11: https://lore.kernel.org/r/20241209-ep-msi-v11-0-7434fa8397bd@nxp.com Changes in v11: - Change to use MSI_FLAG_MSG_IMMUTABLE - Link to v10: https://lore.kernel.org/r/20241204-ep-msi-v10-0-87c378dbcd6d@nxp.com Changes in v10: Thomas Gleixner: There are big change in pci-ep-msi.c. I am sure if go on the corrent path. The key improvement is remove only 1 function devices's limitation. I use new patch for imutable check, which relative additional feature compared to base enablement patch. - Remove patch Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() - Add new patch irqchip/gic-v3-its: Avoid overwriting msi_prepare callback if provided by msi_domain_info - Remove only support 1 endpoint function limiation. - Create one MSI domain for each endpoint function devices. - Use "msi-map" in pci ep controler node, instead of of msi-parent. first argument is (func_no << 8 | vfunc_no) - Link to v9: https://lore.kernel.org/r/20241203-ep-msi-v9-0-a60dbc3f15dd@nxp.com Changes in v9 - Add patch platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() - Remove patch PCI: endpoint: Add pci_epc_get_fn() API for customizable filtering - Remove API pci_epf_align_inbound_addr_lo_hi - Move doorbell_alloc in to doorbell_enable function. - Link to v8: https://lore.kernel.org/r/20241116-ep-msi-v8-0-6f1f68ffd1bb@nxp.com Changes in v8: - update helper function name to pci_epf_align_inbound_addr() - Link to v7: https://lore.kernel.org/r/20241114-ep-msi-v7-0-d4ac7aafbd2c@nxp.com Changes in v7: - Add helper function pci_epf_align_addr(); - Link to v6: https://lore.kernel.org/r/20241112-ep-msi-v6-0-45f9722e3c2a@nxp.com Changes in v6: - change doorbell_addr to doorbell_offset - use round_down() - add Niklas's test by tag - rebase to pci/endpoint - Link to v5: https://lore.kernel.org/r/20241108-ep-msi-v5-0-a14951c0d007@nxp.com Changes in v5: - Move request_irq to epf test function driver for more flexiable user case - Add fixed size bar handler - Some minor improvememtn to see each patches's changelog. - Link to v4: https://lore.kernel.org/r/20241031-ep-msi-v4-0-717da2d99b28@nxp.com Changes in v4: - Remove patch genirq/msi: Add cleanup guard define for msi_lock_descs()/msi_unlock_descs() - Use new method to avoid compatible problem. Add new command DOORBELL_ENABLE and DOORBELL_DISABLE. pcitest -B send DOORBELL_ENABLE first, EP test function driver try to remap one of BAR_N (except test register bar) to ITS MSI MMIO space. Old driver don't support new command, so failure return, not side effect. After test, DOORBELL_DISABLE command send out to recover original map, so pcitest bar test can pass as normal. - Other detail change see each patches's change log - Link to v3: https://lore.kernel.org/r/20241015-ep-msi-v3-0-cedc89a16c1a@nxp.com Change from v2 to v3 - Fixed manivannan's comments - Move common part to pci-ep-msi.c and pci-ep-msi.h - rebase to 6.12-rc1 - use RevID to distingiush old version mkdir /sys/kernel/config/pci_ep/functions/pci_epf_test/func1 echo 16 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/msi_interrupts echo 0x080c > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/deviceid echo 0x1957 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/vendorid echo 1 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/revid ^^^^^^ to enable platform msi support. ln -s /sys/kernel/config/pci_ep/functions/pci_epf_test/func1 /sys/kernel/config/pci_ep/controllers/4c380000.pcie-ep - use new device ID, which identify support doorbell to avoid broken compatility. Enable doorbell support only for PCI_DEVICE_ID_IMX8_DB, while other devices keep the same behavior as before. EP side RC with old driver RC with new driver PCI_DEVICE_ID_IMX8_DB no probe doorbell enabled Other device ID doorbell disabled* doorbell disabled* * Behavior remains unchanged. Change from v1 to v2 - Add missed patch for endpont/pci-epf-test.c - Move alloc and free to epc driver from epf. - Provide general help function for EPC driver to alloc platform msi irq. - Fixed manivannan's comments. Signed-off-by: Frank Li <Frank.Li(a)nxp.com> --- Frank Li (10): PCI: endpoint: Set ID and of_node for function driver PCI: endpoint: Add RC-to-EP doorbell support using platform MSI controller PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check PCI: endpoint: Add pci_epf_align_inbound_addr() helper for address alignment PCI: endpoint: pci-epf-test: Add doorbell test support misc: pci_endpoint_test: Add doorbell test case selftests: pci_endpoint: Add doorbell test case pci: imx6: Add helper function imx_pcie_add_lut_by_rid() pci: imx6: Add LUT setting for MSI/IOMMU in Endpoint mode arm64: dts: imx95: Add msi-map for pci-ep device arch/arm64/boot/dts/freescale/imx95.dtsi | 1 + drivers/misc/pci_endpoint_test.c | 82 ++++++++++++ drivers/pci/controller/dwc/pci-imx6.c | 25 ++-- drivers/pci/endpoint/Makefile | 1 + drivers/pci/endpoint/functions/pci-epf-test.c | 142 +++++++++++++++++++++ drivers/pci/endpoint/pci-ep-msi.c | 90 +++++++++++++ drivers/pci/endpoint/pci-epf-core.c | 48 +++++++ include/linux/pci-ep-msi.h | 28 ++++ include/linux/pci-epf.h | 21 +++ include/uapi/linux/pcitest.h | 1 + .../selftests/pci_endpoint/pci_endpoint_test.c | 28 ++++ 11 files changed, 459 insertions(+), 8 deletions(-) --- base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 change-id: 20241010-ep-msi-8b4cab33b1be Best regards, --- Frank Li <Frank.Li(a)nxp.com>

6 months

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