Add a test for iommufd to verify creation of multiple iommus using an already setup iommufd and switch between them.
Signed-off-by: Samiullah Khawaja <[email protected]> --- tools/testing/selftests/vfio/Makefile | 1 + .../vfio/vfio_iommufd_multi_iommu_test.c | 203 ++++++++++++++++++ 2 files changed, 204 insertions(+) create mode 100644 tools/testing/selftests/vfio/vfio_iommufd_multi_iommu_test.c diff --git a/tools/testing/selftests/vfio/Makefile b/tools/testing/selftests/vfio/Makefile index 0684932d91bf..24bdeaad590f 100644 --- a/tools/testing/selftests/vfio/Makefile +++ b/tools/testing/selftests/vfio/Makefile @@ -8,6 +8,7 @@ else CFLAGS = $(KHDR_INCLUDES) TEST_GEN_PROGS += vfio_dma_mapping_test TEST_GEN_PROGS += vfio_dma_mapping_mmio_test +TEST_GEN_PROGS += vfio_iommufd_multi_iommu_test TEST_GEN_PROGS += vfio_iommufd_setup_test TEST_GEN_PROGS += vfio_pci_device_test TEST_GEN_PROGS += vfio_pci_device_init_perf_test diff --git a/tools/testing/selftests/vfio/vfio_iommufd_multi_iommu_test.c b/tools/testing/selftests/vfio/vfio_iommufd_multi_iommu_test.c new file mode 100644 index 000000000000..7199c662637c --- /dev/null +++ b/tools/testing/selftests/vfio/vfio_iommufd_multi_iommu_test.c @@ -0,0 +1,203 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <sys/ioctl.h> +#include <sys/mman.h> + +#include <linux/sizes.h> +#include <linux/vfio.h> + +#include <libvfio.h> + +#include "kselftest_harness.h" + +static const char *device_bdf; + +#define IOMMU_DEFAULT 0 +#define IOMMU_WITH_PT 1 +#define IOMMU_WITHOUT_PT 2 + +static void region_setup(struct iommu *iommu, + struct iova_allocator *iova_allocator, + struct dma_region *region, u64 size) +{ + const int flags = MAP_SHARED | MAP_ANONYMOUS; + const int prot = PROT_READ | PROT_WRITE; + void *vaddr; + + vaddr = mmap(NULL, size, prot, flags, -1, 0); + VFIO_ASSERT_NE(vaddr, MAP_FAILED); + + region->vaddr = vaddr; + region->iova = iova_allocator_alloc(iova_allocator, size); + region->size = size; + + iommu_map(iommu, region); +} + +static void region_teardown(struct iommu *iommu, struct dma_region *region) +{ + iommu_unmap(iommu, region); + VFIO_ASSERT_EQ(munmap(region->vaddr, region->size), 0); +} + +FIXTURE(vfio_iommufd_multi_iommu_test) { + struct iommu *iommu; + struct vfio_pci_device *device; + struct iova_allocator *iova_allocator; + struct dma_region memcpy_region; + void *vaddr; + + u64 size; + void *src; + void *dst; + iova_t src_iova; + iova_t dst_iova; +}; + +FIXTURE_SETUP(vfio_iommufd_multi_iommu_test) +{ + struct vfio_pci_driver *driver; + + self->iommu = iommu_init("iommufd"); + self->device = vfio_pci_device_init(device_bdf, self->iommu); + self->iova_allocator = iova_allocator_init(self->iommu); + + driver = &self->device->driver; + + region_setup(self->iommu, self->iova_allocator, &self->memcpy_region, SZ_1G); + region_setup(self->iommu, self->iova_allocator, &driver->region, SZ_2M); + + if (driver->ops) + vfio_pci_driver_init(self->device); + + self->size = self->memcpy_region.size / 2; + self->src = self->memcpy_region.vaddr; + self->dst = self->src + self->size; + + self->src_iova = to_iova(self->device, self->src); + self->dst_iova = to_iova(self->device, self->dst); +} + +FIXTURE_TEARDOWN(vfio_iommufd_multi_iommu_test) +{ + struct vfio_pci_driver *driver = &self->device->driver; + + if (driver->ops) + vfio_pci_driver_remove(self->device); + + region_teardown(self->iommu, &self->memcpy_region); + region_teardown(self->iommu, &driver->region); + + iova_allocator_cleanup(self->iova_allocator); + vfio_pci_device_cleanup(self->device); + iommu_cleanup(self->iommu); +} + +FIXTURE_VARIANT(vfio_iommufd_multi_iommu_test) { + u32 start_iommu; + u32 end_iommu; +}; + +#define ADD_IOMMU_VARIANT(S, E) \ + FIXTURE_VARIANT_ADD(vfio_iommufd_multi_iommu_test, S##_to_##E) { \ + .start_iommu = IOMMU_##S, \ + .end_iommu = IOMMU_##E \ + }; + +#define ADD_ALL_VARIANTS(S) \ + ADD_IOMMU_VARIANT(S, DEFAULT) \ + ADD_IOMMU_VARIANT(S, WITH_PT) \ + ADD_IOMMU_VARIANT(S, WITHOUT_PT) + +ADD_ALL_VARIANTS(DEFAULT) +ADD_ALL_VARIANTS(WITH_PT) +ADD_ALL_VARIANTS(WITHOUT_PT) + +static struct iommu *setup_variant_iommu(struct iommu *fixture_iommu, + u32 dev_id, u32 type) +{ + switch (type) { + case IOMMU_WITH_PT: + return iommufd_iommu_init(fixture_iommu->iommufd, dev_id, + IOMMUFD_IOMMU_INIT_CREATE_PT); + case IOMMU_WITHOUT_PT: + return iommufd_iommu_init(fixture_iommu->iommufd, dev_id, 0); + default: + return fixture_iommu; + } +} + +static void test_memcpy(struct vfio_pci_device *device, void *src, void *dst, + iova_t src_iova, iova_t dst_iova, u64 size, char val) +{ + if (!device->driver.ops) + return; + + memset(src, val, size); + memset(dst, 0, size); + + vfio_pci_driver_memcpy_start(device, src_iova, dst_iova, size, 100); + VFIO_ASSERT_EQ(vfio_pci_driver_memcpy_wait(device), 0); + VFIO_ASSERT_EQ(memcmp(src, dst, size), 0); +} + +TEST_F(vfio_iommufd_multi_iommu_test, memcpy) +{ + struct dma_region memcpy_region1, driver_region1; + struct dma_region memcpy_region2, driver_region2; + struct iommu *iommu1; + struct iommu *iommu2; + + iommu1 = setup_variant_iommu(self->iommu, self->device->dev_id, + variant->start_iommu); + if (iommu1 != self->iommu) { + memcpy_region1 = self->memcpy_region; + driver_region1 = self->device->driver.region; + + iommu_map(iommu1, &memcpy_region1); + iommu_map(iommu1, &driver_region1); + + vfio_pci_device_attach_iommu(self->device, iommu1); + } + + test_memcpy(self->device, self->src, self->dst, self->src_iova, + self->dst_iova, self->size, 'x'); + + iommu2 = setup_variant_iommu(self->iommu, self->device->dev_id, + variant->end_iommu); + if (iommu2 != self->iommu) { + memcpy_region2 = self->memcpy_region; + driver_region2 = self->device->driver.region; + + iommu_map(iommu2, &memcpy_region2); + iommu_map(iommu2, &driver_region2); + } + + vfio_pci_device_attach_iommu(self->device, iommu2); + test_memcpy(self->device, self->src, self->dst, self->src_iova, + self->dst_iova, self->size, 'a'); + + vfio_pci_device_attach_iommu(self->device, iommu1); + test_memcpy(self->device, self->src, self->dst, self->src_iova, + self->dst_iova, self->size, '1'); + + if (iommu1 != self->iommu) { + /* attach back to default iommu for cleanup */ + vfio_pci_device_attach_iommu(self->device, self->iommu); + iommu_unmap(iommu1, &memcpy_region1); + iommu_unmap(iommu1, &driver_region1); + iommu_cleanup(iommu1); + } + + if (iommu2 != self->iommu) { + iommu_unmap(iommu2, &memcpy_region2); + iommu_unmap(iommu2, &driver_region2); + iommu_cleanup(iommu2); + } +} + +int main(int argc, char *argv[]) +{ + device_bdf = vfio_selftests_get_bdf(&argc, argv); + + return test_harness_run(argc, argv); +} -- 2.54.0.545.g6539524ca2-goog
