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[PATCH RFCv2 00/13] iommu: Add MSI mapping support with nested SMMU

by Nicolin Chen

[ Background ] On ARM GIC systems and others, the target address of the MSI is translated by the IOMMU. For GIC, the MSI address page is called "ITS" page. When the IOMMU is disabled, the MSI address is programmed to the physical location of the GIC ITS page (e.g. 0x20200000). When the IOMMU is enabled, the ITS page is behind the IOMMU, so the MSI address is programmed to an allocated IO virtual address (a.k.a IOVA), e.g. 0xFFFF0000, which must be mapped to the physical ITS page: IOVA (0xFFFF0000) ===> PA (0x20200000). When a 2-stage translation is enabled, IOVA will be still used to program the MSI address, though the mappings will be in two stages: IOVA (0xFFFF0000) ===> IPA (e.g. 0x80900000) ===> PA (0x20200000) (IPA stands for Intermediate Physical Address). If the device that generates MSI is attached to an IOMMU_DOMAIN_DMA, the IOVA is dynamically allocated from the top of the IOVA space. If attached to an IOMMU_DOMAIN_UNMANAGED (e.g. a VFIO passthrough device), the IOVA is fixed to an MSI window reported by the IOMMU driver via IOMMU_RESV_SW_MSI, which is hardwired to MSI_IOVA_BASE (IOVA==0x8000000) for ARM IOMMUs. So far, this IOMMU_RESV_SW_MSI works well as kernel is entirely in charge of the IOMMU translation (1-stage translation), since the IOVA for the ITS page is fixed and known by kernel. However, with virtual machine enabling a nested IOMMU translation (2-stage), a guest kernel directly controls the stage-1 translation with an IOMMU_DOMAIN_DMA, mapping a vITS page (at an IPA 0x80900000) onto its own IOVA space (e.g. 0xEEEE0000). Then, the host kernel can't know that guest-level IOVA to program the MSI address. There have been two approaches to solve this problem: 1. Create an identity mapping in the stage-1. VMM could insert a few RMRs (Reserved Memory Regions) in guest's IORT. Then the guest kernel would fetch these RMR entries from the IORT and create an IOMMU_RESV_DIRECT region per iommu group for a direct mapping. Eventually, the mappings would look like: IOVA (0x8000000) === IPA (0x8000000) ===> 0x20200000 This requires an IOMMUFD ioctl for kernel and VMM to agree on the IPA. 2. Forward the guest-level MSI IOVA captured by VMM to the host-level GIC driver, to program the correct MSI IOVA. Forward the VMM-defined vITS page location (IPA) to the kernel for the stage-2 mapping. Eventually: IOVA (0xFFFF0000) ===> IPA (0x80900000) ===> PA (0x20200000) This requires a VFIO ioctl (for IOVA) and an IOMMUFD ioctl (for IPA). Worth mentioning that when Eric Auger was working on the same topic with the VFIO iommu uAPI, he had the approach (2) first, and then switched to the approach (1), suggested by Jean-Philippe for reduction of complexity. The approach (1) basically feels like the existing VFIO passthrough that has a 1-stage mapping for the unmanaged domain, yet only by shifting the MSI mapping from stage 1 (guest-has-no-iommu case) to stage 2 (guest-has- iommu case). So, it could reuse the existing IOMMU_RESV_SW_MSI piece, by sharing the same idea of "VMM leaving everything to the kernel". The approach (2) is an ideal solution, yet it requires additional effort for kernel to be aware of the 1-stage gIOVA(s) and 2-stage IPAs for vITS page(s), which demands VMM to closely cooperate. * It also brings some complicated use cases to the table where the host or/and guest system(s) has/have multiple ITS pages. [ Execution ] Though these two approaches feel very different on the surface, they can share some underlying common infrastructure. Currently, only one pair of sw_msi functions (prepare/compose) are provided by dma-iommu for irqchip drivers to directly use. There could be different versions of functions from different domain owners: for existing VFIO passthrough cases and in- kernel DMA domain cases, reuse the existing dma-iommu's version of sw_msi functions; for nested translation use cases, there can be another version of sw_msi functions to handle mapping and msi_msg(s) differently. To support both approaches, in this series - Get rid of the duplication in the "compose" function - Introduce a function pointer for the previously "prepare" function - Allow different domain owners to set their own "sw_msi" implementations - Implement an iommufd_sw_msi function to additionally support a nested translation use case using the approach (2), i.e. the RMR solution - Add a pair of IOMMUFD options for a SW_MSI window for kernel and VMM to agree on (for approach 1) - Add a new VFIO ioctl to set the MSI(x) vector(s) for iommufd_sw_msi() to update the msi_desc structure accordingly (for approach 2) A missing piece - Potentially another IOMMUFD_CMD_IOAS_MAP_MSI ioctl for VMM to map the IPAs of the vITS page(s) in the stage-2 io page table. (for approach 2) (in this RFC, conveniently reuse the new IOMMUFD SW_MSI options to set the vITS page's IPA, which works finely in a single-vITS-page case.) This is a joint effort that includes Jason's rework in irq/iommu/iommufd base level and my additional patches on top of that for new uAPIs. This series is on github: https://github.com/nicolinc/iommufd/commits/iommufd_msi-rfcv2 Pairing QEMU branch for testing (approach 1): https://github.com/nicolinc/qemu/commits/wip/for_iommufd_msi-rfcv2-rmr Pairing QEMU branch for testing (approach 2): https://github.com/nicolinc/qemu/commits/wip/for_iommufd_msi-rfcv2-vits Changelog v2 * Rebase on v6.13-rc6 * Drop all the irq/pci patches and rework the compose function instead * Add a new sw_msi op to iommu_domain for a per type implementation and let iommufd core has its own implementation to support both approaches * Add RMR-solution (approach 1) support since it is straightforward and have been used in some out-of-tree projects widely v1 https://lore.kernel.org/kvm/cover.1731130093.git.nicolinc@nvidia.com/ Thanks! Nicolin Jason Gunthorpe (5): genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu_cookie genirq/msi: Rename iommu_dma_compose_msi_msg() to msi_msg_set_msi_addr() iommu: Make iommu_dma_prepare_msi() into a generic operation irqchip: Have CONFIG_IRQ_MSI_IOMMU be selected by the irqchips that need it iommufd: Implement sw_msi support natively Nicolin Chen (8): iommu: Turn fault_data to iommufd private pointer iommufd: Make attach_handle generic iommu: Turn iova_cookie to dma-iommu private pointer iommufd: Add IOMMU_OPTION_SW_MSI_START/SIZE ioctls iommufd/selftes: Add coverage for IOMMU_OPTION_SW_MSI_START/SIZE iommufd/device: Allow setting IOVAs for MSI(x) vectors vfio-iommufd: Provide another layer of msi_iova helpers vfio/pci: Allow preset MSI IOVAs via VFIO_IRQ_SET_ACTION_PREPARE drivers/iommu/Kconfig | 1 - drivers/irqchip/Kconfig | 4 + kernel/irq/Kconfig | 1 + drivers/iommu/iommufd/iommufd_private.h | 69 ++-- include/linux/iommu.h | 58 ++-- include/linux/iommufd.h | 6 + include/linux/msi.h | 43 ++- include/linux/vfio.h | 25 ++ include/uapi/linux/iommufd.h | 18 +- include/uapi/linux/vfio.h | 8 +- drivers/iommu/dma-iommu.c | 63 ++-- drivers/iommu/iommu.c | 29 ++ drivers/iommu/iommufd/device.c | 312 ++++++++++++++++-- drivers/iommu/iommufd/fault.c | 122 +------ drivers/iommu/iommufd/hw_pagetable.c | 5 +- drivers/iommu/iommufd/io_pagetable.c | 4 +- drivers/iommu/iommufd/ioas.c | 34 ++ drivers/iommu/iommufd/main.c | 15 + drivers/irqchip/irq-gic-v2m.c | 5 +- drivers/irqchip/irq-gic-v3-its.c | 13 +- drivers/irqchip/irq-gic-v3-mbi.c | 12 +- drivers/irqchip/irq-ls-scfg-msi.c | 5 +- drivers/vfio/iommufd.c | 27 ++ drivers/vfio/pci/vfio_pci_intrs.c | 46 +++ drivers/vfio/vfio_main.c | 3 + tools/testing/selftests/iommu/iommufd.c | 53 +++ .../selftests/iommu/iommufd_fail_nth.c | 14 + 27 files changed, 712 insertions(+), 283 deletions(-) -- 2.43.0

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[PATCH v2 0/2] tools/nolibc: add support for directory access

by Thomas Weißschuh

Add support opendir(), readdir_r(), closedir() and friends. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- Changes in v2: - Move definitions to dirent.h - Reserve space for the trailing NULL byte of d_name - Implement readdir_r() instead of readdir() - Expand commit message - Link to v1: https://lore.kernel.org/r/20250130-nolibc-dir-v1-0-ea9950b52e29@weissschuh.… --- Thomas Weißschuh (2): tools/nolibc: add support for sys_llseek() tools/nolibc: add support for directory access tools/include/nolibc/Makefile | 1 + tools/include/nolibc/dirent.h | 98 ++++++++++++++++++++++++++++ tools/include/nolibc/nolibc.h | 1 + tools/include/nolibc/sys.h | 29 +++++++- tools/testing/selftests/nolibc/nolibc-test.c | 39 +++++++++++ 5 files changed, 167 insertions(+), 1 deletion(-) --- base-commit: c1f4a7a84037249d086a4114c0c4332a260e9091 change-id: 20250130-nolibc-dir-980c2e2b661a Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

10 months

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[PATCH] selftests: mm: Fixed typo

by Eric Salem

Fixed misspelling. Signed-off-by: Eric Salem <ericsalem(a)gmail.com> --- tools/testing/selftests/mm/uffd-common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/uffd-common.c b/tools/testing/selftests/mm/uffd-common.c index 717539eddf98..f23c57d9d1bd 100644 --- a/tools/testing/selftests/mm/uffd-common.c +++ b/tools/testing/selftests/mm/uffd-common.c @@ -323,7 +323,7 @@ int uffd_test_ctx_init(uint64_t features, const char **errmsg) ret = userfaultfd_open(&features); if (ret) { if (errmsg) - *errmsg = "possible lack of priviledge"; + *errmsg = "possible lack of privilege"; return ret; } -- 2.48.1

10 months

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[PATCH v4 0/2] lib/prime_numbers: convert self-test to KUnit

by Tamir Duberstein

This is a clear example of a unit test. I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 math-prime_numbers On success: ; [08:51:41] ============== math-prime_numbers (1 subtest) ============== ; [08:51:41] [PASSED] prime_numbers_test ; [08:51:41] =============== [PASSED] math-prime_numbers ================ ; [08:51:41] ============================================================ ; [08:51:41] Testing complete. Ran 1 tests: passed: 1 On failure: ; [08:50:19] ============== math-prime_numbers (1 subtest) ============== ; [08:50:19] # prime_numbers_test: ASSERTION FAILED at lib/math/tests/prime_numbers_kunit.c:28 ; [08:50:19] Expected slow == fast, but ; [08:50:19] slow == 0 (0x0) ; [08:50:19] fast == 1 (0x1) ; [08:50:19] is-prime(2) ; [08:50:19] [FAILED] prime_numbers_test ; [08:50:19] # module: prime_numbers_kunit ; [08:50:19] # math-prime_numbers: primes.{last=61, .sz=64, .primes[]=...x28208a20a08a28ac} = 2-3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61 ; [08:50:19] =============== [FAILED] math-prime_numbers ================ ; [08:50:19] ============================================================ ; [08:50:19] Testing complete. Ran 1 tests: failed: 1 Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v4: - Use `#if IS_ENABLED` to handle `CONFIG_PRIME_NUMBERS_KUNIT_TEST=m`. (Andrew Morton) - Link to v3: https://lore.kernel.org/r/20250208-prime_numbers-kunit-convert-v3-0-8ffd581… Changes in v3: - Remove `selftest_max` again; snuck into v2. - Restore `#include <linux/slab.h>`. - Sending v3 early because kernel test robot is sad. - Link to v2: https://lore.kernel.org/r/20250208-prime_numbers-kunit-convert-v2-0-8631194… Changes in v2: - Keep all the details hidden in prime_numbers.c; expose `with_primes` for debug logging in the test. (David Gow) - Link to v1: https://lore.kernel.org/r/20250207-prime_numbers-kunit-convert-v1-0-6067f2b… --- Tamir Duberstein (2): lib/math: Hook up tests/Makefile lib/prime_numbers: convert self-test to KUnit lib/Kconfig.debug | 14 +++++ lib/math/Makefile | 4 +- lib/math/prime_numbers.c | 76 ++++------------------------ lib/math/prime_numbers_private.h | 17 +++++++ lib/math/tests/Makefile | 1 + lib/math/tests/prime_numbers_kunit.c | 59 +++++++++++++++++++++ tools/testing/selftests/lib/config | 1 - tools/testing/selftests/lib/prime_numbers.sh | 4 -- 8 files changed, 102 insertions(+), 74 deletions(-) --- base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b change-id: 20250207-prime_numbers-kunit-convert-71c9b3c1d1d4 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

10 months

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[PATCH v3 0/2] lib/prime_numbers: convert self-test to KUnit

by Tamir Duberstein

This is a clear example of a unit test. I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 math-prime_numbers On success: ; [08:51:41] ============== math-prime_numbers (1 subtest) ============== ; [08:51:41] [PASSED] prime_numbers_test ; [08:51:41] =============== [PASSED] math-prime_numbers ================ ; [08:51:41] ============================================================ ; [08:51:41] Testing complete. Ran 1 tests: passed: 1 On failure: ; [08:50:19] ============== math-prime_numbers (1 subtest) ============== ; [08:50:19] # prime_numbers_test: ASSERTION FAILED at lib/math/tests/prime_numbers_kunit.c:28 ; [08:50:19] Expected slow == fast, but ; [08:50:19] slow == 0 (0x0) ; [08:50:19] fast == 1 (0x1) ; [08:50:19] is-prime(2) ; [08:50:19] [FAILED] prime_numbers_test ; [08:50:19] # module: prime_numbers_kunit ; [08:50:19] # math-prime_numbers: primes.{last=61, .sz=64, .primes[]=...x28208a20a08a28ac} = 2-3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61 ; [08:50:19] =============== [FAILED] math-prime_numbers ================ ; [08:50:19] ============================================================ ; [08:50:19] Testing complete. Ran 1 tests: failed: 1 Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v3: - Remove `selftest_max` again; snuck into v2. - Restore `#include <linux/slab.h>`. - Sending v3 early because kernel test robot is sad. - Link to v2: https://lore.kernel.org/r/20250208-prime_numbers-kunit-convert-v2-0-8631194… Changes in v2: - Keep all the details hidden in prime_numbers.c; expose `with_primes` for debug logging in the test. (David Gow) - Link to v1: https://lore.kernel.org/r/20250207-prime_numbers-kunit-convert-v1-0-6067f2b… --- Tamir Duberstein (2): lib/math: Hook up tests/Makefile lib/prime_numbers: convert self-test to KUnit lib/Kconfig.debug | 14 +++++ lib/math/Makefile | 4 +- lib/math/prime_numbers.c | 76 ++++------------------------ lib/math/prime_numbers_private.h | 17 +++++++ lib/math/tests/Makefile | 1 + lib/math/tests/prime_numbers_kunit.c | 59 +++++++++++++++++++++ tools/testing/selftests/lib/config | 1 - tools/testing/selftests/lib/prime_numbers.sh | 4 -- 8 files changed, 102 insertions(+), 74 deletions(-) --- base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b change-id: 20250207-prime_numbers-kunit-convert-71c9b3c1d1d4 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

10 months

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[PATCH v2 0/2] lib/prime_numbers: convert self-test to KUnit

by Tamir Duberstein

This is a clear example of a unit test. I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 math-prime_numbers On success: ; [08:51:41] ============== math-prime_numbers (1 subtest) ============== ; [08:51:41] [PASSED] prime_numbers_test ; [08:51:41] =============== [PASSED] math-prime_numbers ================ ; [08:51:41] ============================================================ ; [08:51:41] Testing complete. Ran 1 tests: passed: 1 On failure: ; [08:50:19] ============== math-prime_numbers (1 subtest) ============== ; [08:50:19] # prime_numbers_test: ASSERTION FAILED at lib/math/tests/prime_numbers_kunit.c:28 ; [08:50:19] Expected slow == fast, but ; [08:50:19] slow == 0 (0x0) ; [08:50:19] fast == 1 (0x1) ; [08:50:19] is-prime(2) ; [08:50:19] [FAILED] prime_numbers_test ; [08:50:19] # module: prime_numbers_kunit ; [08:50:19] # math-prime_numbers: primes.{last=61, .sz=64, .primes[]=...x28208a20a08a28ac} = 2-3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61 ; [08:50:19] =============== [FAILED] math-prime_numbers ================ ; [08:50:19] ============================================================ ; [08:50:19] Testing complete. Ran 1 tests: failed: 1 Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v2: - Keep all the details hidden in prime_numbers.c; expose `with_primes` for debug logging in the test. (David Gow) - Link to v1: https://lore.kernel.org/r/20250207-prime_numbers-kunit-convert-v1-0-6067f2b… --- Tamir Duberstein (2): lib/math: Hook up tests/Makefile lib/prime_numbers: convert self-test to KUnit lib/Kconfig.debug | 14 +++++ lib/math/Makefile | 4 +- lib/math/prime_numbers.c | 82 ++++------------------------ lib/math/prime_numbers_private.h | 17 ++++++ lib/math/tests/Makefile | 1 + lib/math/tests/prime_numbers_kunit.c | 59 ++++++++++++++++++++ tools/testing/selftests/lib/config | 1 - tools/testing/selftests/lib/prime_numbers.sh | 4 -- 8 files changed, 104 insertions(+), 78 deletions(-) --- base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b change-id: 20250207-prime_numbers-kunit-convert-71c9b3c1d1d4 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

10 months

2
6
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Re: The business loan-

by David Song

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10 months

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[PATCH 0/6] KUnit test moves / renames

by David Gow

As discussed in [1], the KUnit test naming scheme has changed to avoid name conflicts (and tab-completion woes) with the files being tested. These renames and moves have caused a nasty set of merge conflicts, so this series collates and rebases them all to be applied via mm-nonmm-unstable alongside any lib/ changes[2]. Thanks to everyone whose patches appear here, and everyone who reviewed on the original series. I hope I didn't break them too much during the rebase! Link: https://lore.kernel.org/lkml/20240720165441.it.320-kees@kernel.org/ [1] Link: https://lore.kernel.org/lkml/CABVgOSmbSzcGUi=E4piSojh3A4_0GjE0fAYbqKjtYGbE9… [2] --- Bruno Sobreira França (1): lib/math: Add int_log test suite Diego Vieira (1): lib/tests/kfifo_kunit.c: add tests for the kfifo structure Gabriela Bittencourt (2): unicode: kunit: refactor selftest to kunit tests unicode: kunit: change tests filename and path Kees Cook (1): lib: Move KUnit tests into tests/ subdirectory Luis Felipe Hernandez (1): lib: math: Move kunit tests into tests/ subdir MAINTAINERS | 19 +- arch/m68k/configs/amiga_defconfig | 2 +- arch/m68k/configs/apollo_defconfig | 2 +- arch/m68k/configs/atari_defconfig | 2 +- arch/m68k/configs/bvme6000_defconfig | 2 +- arch/m68k/configs/hp300_defconfig | 2 +- arch/m68k/configs/mac_defconfig | 2 +- arch/m68k/configs/multi_defconfig | 2 +- arch/m68k/configs/mvme147_defconfig | 2 +- arch/m68k/configs/mvme16x_defconfig | 2 +- arch/m68k/configs/q40_defconfig | 2 +- arch/m68k/configs/sun3_defconfig | 2 +- arch/m68k/configs/sun3x_defconfig | 2 +- arch/powerpc/configs/ppc64_defconfig | 2 +- fs/unicode/Kconfig | 5 +- fs/unicode/Makefile | 2 +- fs/unicode/tests/.kunitconfig | 3 + .../{utf8-selftest.c => tests/utf8_kunit.c} | 149 ++++++------ fs/unicode/utf8-norm.c | 2 +- lib/Kconfig.debug | 31 ++- lib/Makefile | 36 +-- lib/math/Makefile | 5 +- lib/math/tests/Makefile | 6 +- .../{test_div64.c => tests/div64_kunit.c} | 0 lib/math/tests/int_log_kunit.c | 75 ++++++ .../mul_u64_u64_div_u64_kunit.c} | 2 +- .../rational_kunit.c} | 0 lib/tests/Makefile | 39 +++ lib/{ => tests}/bitfield_kunit.c | 0 lib/{ => tests}/checksum_kunit.c | 0 lib/{ => tests}/cmdline_kunit.c | 0 lib/{ => tests}/cpumask_kunit.c | 0 lib/{ => tests}/fortify_kunit.c | 0 lib/{ => tests}/hashtable_test.c | 0 lib/{ => tests}/is_signed_type_kunit.c | 0 lib/tests/kfifo_kunit.c | 224 ++++++++++++++++++ lib/{ => tests}/kunit_iov_iter.c | 0 lib/{ => tests}/list-test.c | 0 lib/{ => tests}/memcpy_kunit.c | 0 lib/{ => tests}/overflow_kunit.c | 0 lib/{ => tests}/siphash_kunit.c | 0 lib/{ => tests}/slub_kunit.c | 0 lib/{ => tests}/stackinit_kunit.c | 0 lib/{ => tests}/string_helpers_kunit.c | 0 lib/{ => tests}/string_kunit.c | 0 lib/{ => tests}/test_bits.c | 0 lib/{ => tests}/test_fprobe.c | 0 lib/{ => tests}/test_hash.c | 0 lib/{ => tests}/test_kprobes.c | 0 lib/{ => tests}/test_linear_ranges.c | 0 lib/{ => tests}/test_list_sort.c | 0 lib/{ => tests}/test_sort.c | 0 lib/{ => tests}/usercopy_kunit.c | 0 53 files changed, 474 insertions(+), 150 deletions(-) create mode 100644 fs/unicode/tests/.kunitconfig rename fs/unicode/{utf8-selftest.c => tests/utf8_kunit.c} (64%) rename lib/math/{test_div64.c => tests/div64_kunit.c} (100%) create mode 100644 lib/math/tests/int_log_kunit.c rename lib/math/{test_mul_u64_u64_div_u64.c => tests/mul_u64_u64_div_u64_kunit.c} (98%) rename lib/math/{rational-test.c => tests/rational_kunit.c} (100%) create mode 100644 lib/tests/Makefile rename lib/{ => tests}/bitfield_kunit.c (100%) rename lib/{ => tests}/checksum_kunit.c (100%) rename lib/{ => tests}/cmdline_kunit.c (100%) rename lib/{ => tests}/cpumask_kunit.c (100%) rename lib/{ => tests}/fortify_kunit.c (100%) rename lib/{ => tests}/hashtable_test.c (100%) rename lib/{ => tests}/is_signed_type_kunit.c (100%) create mode 100644 lib/tests/kfifo_kunit.c rename lib/{ => tests}/kunit_iov_iter.c (100%) rename lib/{ => tests}/list-test.c (100%) rename lib/{ => tests}/memcpy_kunit.c (100%) rename lib/{ => tests}/overflow_kunit.c (100%) rename lib/{ => tests}/siphash_kunit.c (100%) rename lib/{ => tests}/slub_kunit.c (100%) rename lib/{ => tests}/stackinit_kunit.c (100%) rename lib/{ => tests}/string_helpers_kunit.c (100%) rename lib/{ => tests}/string_kunit.c (100%) rename lib/{ => tests}/test_bits.c (100%) rename lib/{ => tests}/test_fprobe.c (100%) rename lib/{ => tests}/test_hash.c (100%) rename lib/{ => tests}/test_kprobes.c (100%) rename lib/{ => tests}/test_linear_ranges.c (100%) rename lib/{ => tests}/test_list_sort.c (100%) rename lib/{ => tests}/test_sort.c (100%) rename lib/{ => tests}/usercopy_kunit.c (100%) -- 2.47.0.rc1.288.g06298d1525-goog

10 months

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[PATCH v14 00/15] 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 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 (15): platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() irqdomain: Add IRQ_DOMAIN_FLAG_MSI_IMMUTABLE and irq_domain_is_msi_immutable() irqchip/gic-v3-its: Set IRQ_DOMAIN_FLAG_MSI_IMMUTABLE for ITS irqchip/gic-v3-its: Add support for device tree msi-map and msi-mask 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 arm64: dts: imx95-19x19-evk: Add PCIe1 endpoint function overlay file arch/arm64/boot/dts/freescale/Makefile | 3 + .../dts/freescale/imx95-19x19-evk-pcie1-ep.dtso | 21 ++++ arch/arm64/boot/dts/freescale/imx95.dtsi | 1 + drivers/base/platform-msi.c | 1 + drivers/irqchip/irq-gic-v3-its-msi-parent.c | 8 ++ drivers/irqchip/irq-gic-v3-its.c | 2 +- drivers/misc/pci_endpoint_test.c | 81 +++++++++++++ drivers/pci/controller/dwc/pci-imx6.c | 25 ++-- drivers/pci/endpoint/Makefile | 2 +- drivers/pci/endpoint/functions/pci-epf-test.c | 132 +++++++++++++++++++++ drivers/pci/endpoint/pci-ep-msi.c | 89 ++++++++++++++ drivers/pci/endpoint/pci-epf-core.c | 48 ++++++++ include/linux/irqdomain.h | 7 ++ include/linux/pci-ep-msi.h | 26 ++++ include/linux/pci-epf.h | 21 ++++ include/uapi/linux/pcitest.h | 1 + .../selftests/pci_endpoint/pci_endpoint_test.c | 25 ++++ 17 files changed, 483 insertions(+), 10 deletions(-) --- base-commit: 00f3246adeeacbda0bd0b303604e46eb59c32e6e change-id: 20241010-ep-msi-8b4cab33b1be Best regards, --- Frank Li <Frank.Li(a)nxp.com>

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[PATCH 0/2] lib/prime_numbers: convert self-test to KUnit

by Tamir Duberstein

This is a clear example of a unit test. I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 math-prime_numbers ; KTAP version 1 ; 1..1 ; KTAP version 1 ; # Subtest: math-prime_numbers ; # module: prime_numbers_kunit ; 1..1 ; # prime_numbers_test: prime_numbers_test(65536) passed, last prime was 65521 ; # prime_numbers_test: primes.{last=61, .sz=64, .primes[]=...x28208a20a08a28ac} = 2-3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61 ; ; ok 1 prime_numbers_test ; ok 1 math-prime_numbers Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Tamir Duberstein (2): lib/math: Hook up tests/Makefile lib/prime_numbers: convert self-test to KUnit lib/Kconfig.debug | 14 +++ lib/math/Makefile | 4 +- lib/math/prime_numbers.c | 151 +-------------------------- lib/math/prime_numbers_private.h | 64 ++++++++++++ lib/math/tests/Makefile | 1 + lib/math/tests/prime_numbers_kunit.c | 92 ++++++++++++++++ tools/testing/selftests/lib/config | 1 - tools/testing/selftests/lib/prime_numbers.sh | 4 - 8 files changed, 175 insertions(+), 156 deletions(-) --- base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b change-id: 20250207-prime_numbers-kunit-convert-71c9b3c1d1d4 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

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