[PATCH v4 06/18] vfio: selftests: Support multiple devices in the same container/iommufd

Support tests that want to add multiple devices to the same container/iommufd by decoupling struct vfio_pci_device from struct iommu.

Multi-devices tests can now put multiple devices in the same container/iommufd like so:

iommu = iommu_init(iommu_mode);

device1 = vfio_pci_device_init(bdf1, iommu); device2 = vfio_pci_device_init(bdf2, iommu); device3 = vfio_pci_device_init(bdf3, iommu);

...

vfio_pci_device_cleanup(device3); vfio_pci_device_cleanup(device2); vfio_pci_device_cleanup(device1);

iommu_cleanup(iommu);

To account for the new separation of vfio_pci_device and iommu, update existing tests to initialize and cleanup a struct iommu.

Reviewed-by: Alex Mastro amastro@fb.com Tested-by: Alex Mastro amastro@fb.com Reviewed-by: Raghavendra Rao Ananta rananta@google.com Signed-off-by: David Matlack dmatlack@google.com --- .../selftests/vfio/lib/include/vfio_util.h | 6 +- .../selftests/vfio/lib/vfio_pci_device.c | 105 +++++++++++------- .../selftests/vfio/vfio_dma_mapping_test.c | 10 +- .../selftests/vfio/vfio_pci_device_test.c | 10 +- .../selftests/vfio/vfio_pci_driver_test.c | 26 ++++- 5 files changed, 107 insertions(+), 50 deletions(-)

diff --git a/tools/testing/selftests/vfio/lib/include/vfio_util.h b/tools/testing/selftests/vfio/lib/include/vfio_util.h index 3160f2d1ea6d..379942dc5357 100644 --- a/tools/testing/selftests/vfio/lib/include/vfio_util.h +++ b/tools/testing/selftests/vfio/lib/include/vfio_util.h @@ -216,8 +216,12 @@ const char *vfio_pci_get_cdev_path(const char *bdf);

extern const char *default_iommu_mode;

-struct vfio_pci_device *vfio_pci_device_init(const char *bdf, const char *iommu_mode); +struct iommu *iommu_init(const char *iommu_mode); +void iommu_cleanup(struct iommu *iommu); + +struct vfio_pci_device *vfio_pci_device_init(const char *bdf, struct iommu *iommu); void vfio_pci_device_cleanup(struct vfio_pci_device *device); + void vfio_pci_device_reset(struct vfio_pci_device *device);

struct iommu_iova_range *vfio_pci_iova_ranges(struct vfio_pci_device *device, diff --git a/tools/testing/selftests/vfio/lib/vfio_pci_device.c b/tools/testing/selftests/vfio/lib/vfio_pci_device.c index e47f3ccf6d49..8f8fed4f384d 100644 --- a/tools/testing/selftests/vfio/lib/vfio_pci_device.c +++ b/tools/testing/selftests/vfio/lib/vfio_pci_device.c @@ -86,13 +86,13 @@ static struct vfio_iommu_type1_info *vfio_iommu_get_info(struct vfio_pci_device .argsz = sizeof(*info), };

- ioctl_assert(device->container_fd, VFIO_IOMMU_GET_INFO, info); + ioctl_assert(device->iommu->container_fd, VFIO_IOMMU_GET_INFO, info); VFIO_ASSERT_GE(info->argsz, sizeof(*info));

info = realloc(info, info->argsz); VFIO_ASSERT_NOT_NULL(info);

- ioctl_assert(device->container_fd, VFIO_IOMMU_GET_INFO, info); + ioctl_assert(device->iommu->container_fd, VFIO_IOMMU_GET_INFO, info); VFIO_ASSERT_GE(info->argsz, sizeof(*info));

return info; @@ -142,10 +142,10 @@ static struct iommu_iova_range *iommufd_iova_ranges(struct vfio_pci_device *devi

struct iommu_ioas_iova_ranges query = { .size = sizeof(query), - .ioas_id = device->ioas_id, + .ioas_id = device->iommu->ioas_id, };

- ret = ioctl(device->iommufd, IOMMU_IOAS_IOVA_RANGES, &query); + ret = ioctl(device->iommu->iommufd, IOMMU_IOAS_IOVA_RANGES, &query); VFIO_ASSERT_EQ(ret, -1); VFIO_ASSERT_EQ(errno, EMSGSIZE); VFIO_ASSERT_GT(query.num_iovas, 0); @@ -155,7 +155,7 @@ static struct iommu_iova_range *iommufd_iova_ranges(struct vfio_pci_device *devi

query.allowed_iovas = (uintptr_t)ranges;

- ioctl_assert(device->iommufd, IOMMU_IOAS_IOVA_RANGES, &query); + ioctl_assert(device->iommu->iommufd, IOMMU_IOAS_IOVA_RANGES, &query); *nranges = query.num_iovas;

return ranges; @@ -180,7 +180,7 @@ struct iommu_iova_range *vfio_pci_iova_ranges(struct vfio_pci_device *device, { struct iommu_iova_range *ranges;

- if (device->iommufd) + if (device->iommu->iommufd) ranges = iommufd_iova_ranges(device, nranges); else ranges = vfio_iommu_iova_ranges(device, nranges); @@ -633,23 +633,21 @@ static void vfio_pci_group_setup(struct vfio_pci_device *device, const char *bdf

static void vfio_pci_container_setup(struct vfio_pci_device *device, const char *bdf) { - unsigned long iommu_type = device->iommu->mode->iommu_type; - const char *path = device->iommu->mode->container_path; - int version; + struct iommu *iommu = device->iommu; + unsigned long iommu_type = iommu->mode->iommu_type; int ret;

- device->iommu->container_fd = open(path, O_RDWR); - VFIO_ASSERT_GE(device->iommu->container_fd, 0, "open(%s) failed\n", path); - - version = ioctl(device->iommu->container_fd, VFIO_GET_API_VERSION); - VFIO_ASSERT_EQ(version, VFIO_API_VERSION, "Unsupported version: %d\n", version); - vfio_pci_group_setup(device, bdf);

- ret = ioctl(device->iommu->container_fd, VFIO_CHECK_EXTENSION, iommu_type); + ret = ioctl(iommu->container_fd, VFIO_CHECK_EXTENSION, iommu_type); VFIO_ASSERT_GT(ret, 0, "VFIO IOMMU type %lu not supported\n", iommu_type);

- ioctl_assert(device->iommu->container_fd, VFIO_SET_IOMMU, (void *)iommu_type); + /* + * Allow multiple threads to race to set the IOMMU type on the + * container. The first will succeed and the rest should fail + * because the IOMMU type is already set. + */ + (void)ioctl(iommu->container_fd, VFIO_SET_IOMMU, (void *)iommu_type);

device->fd = ioctl(device->group_fd, VFIO_GROUP_GET_DEVICE_FD, bdf); VFIO_ASSERT_GE(device->fd, 0); @@ -797,34 +795,56 @@ static void vfio_pci_iommufd_setup(struct vfio_pci_device *device, const char *b VFIO_ASSERT_GE(device->fd, 0); free((void *)cdev_path);

- /* - * Require device->iommufd to be >0 so that a simple non-0 check can be - * used to check if iommufd is enabled. In practice open() will never - * return 0 unless stdin is closed. - */ - device->iommu->iommufd = open("/dev/iommu", O_RDWR); - VFIO_ASSERT_GT(device->iommu->iommufd, 0); - vfio_device_bind_iommufd(device->fd, device->iommu->iommufd); - device->iommu->ioas_id = iommufd_ioas_alloc(device->iommu->iommufd); vfio_device_attach_iommufd_pt(device->fd, device->iommu->ioas_id); }

-struct vfio_pci_device *vfio_pci_device_init(const char *bdf, const char *iommu_mode) +struct iommu *iommu_init(const char *iommu_mode) +{ + const char *container_path; + struct iommu *iommu; + int version; + + iommu = calloc(1, sizeof(*iommu)); + VFIO_ASSERT_NOT_NULL(iommu); + + INIT_LIST_HEAD(&iommu->dma_regions); + + iommu->mode = lookup_iommu_mode(iommu_mode); + + container_path = iommu->mode->container_path; + if (container_path) { + iommu->container_fd = open(container_path, O_RDWR); + VFIO_ASSERT_GE(iommu->container_fd, 0, "open(%s) failed\n", container_path); + + version = ioctl(iommu->container_fd, VFIO_GET_API_VERSION); + VFIO_ASSERT_EQ(version, VFIO_API_VERSION, "Unsupported version: %d\n", version); + } else { + /* + * Require device->iommufd to be >0 so that a simple non-0 check can be + * used to check if iommufd is enabled. In practice open() will never + * return 0 unless stdin is closed. + */ + iommu->iommufd = open("/dev/iommu", O_RDWR); + VFIO_ASSERT_GT(iommu->iommufd, 0); + + iommu->ioas_id = iommufd_ioas_alloc(iommu->iommufd); + } + + return iommu; +} + +struct vfio_pci_device *vfio_pci_device_init(const char *bdf, struct iommu *iommu) { struct vfio_pci_device *device;

device = calloc(1, sizeof(*device)); VFIO_ASSERT_NOT_NULL(device);

- device->iommu = calloc(1, sizeof(*device->iommu)); - VFIO_ASSERT_NOT_NULL(device->iommu); - - INIT_LIST_HEAD(&device->iommu->dma_regions); - - device->iommu->mode = lookup_iommu_mode(iommu_mode); + VFIO_ASSERT_NOT_NULL(iommu); + device->iommu = iommu;

- if (device->iommu->mode->container_path) + if (iommu->mode->container_path) vfio_pci_container_setup(device, bdf); else vfio_pci_iommufd_setup(device, bdf); @@ -853,17 +873,22 @@ void vfio_pci_device_cleanup(struct vfio_pci_device *device) VFIO_ASSERT_EQ(close(device->msi_eventfds[i]), 0); }

- if (device->iommu->iommufd) { - VFIO_ASSERT_EQ(close(device->iommu->iommufd), 0); - } else { + if (device->group_fd) VFIO_ASSERT_EQ(close(device->group_fd), 0); - VFIO_ASSERT_EQ(close(device->iommu->container_fd), 0); - }

- free(device->iommu); free(device); }

+void iommu_cleanup(struct iommu *iommu) +{ + if (iommu->iommufd) + VFIO_ASSERT_EQ(close(iommu->iommufd), 0); + else + VFIO_ASSERT_EQ(close(iommu->container_fd), 0); + + free(iommu); +} + static bool is_bdf(const char *str) { unsigned int s, b, d, f; diff --git a/tools/testing/selftests/vfio/vfio_dma_mapping_test.c b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c index 102603d4407d..4727feb214c8 100644 --- a/tools/testing/selftests/vfio/vfio_dma_mapping_test.c +++ b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c @@ -94,6 +94,7 @@ static int iommu_mapping_get(const char *bdf, u64 iova, }

FIXTURE(vfio_dma_mapping_test) { + struct iommu *iommu; struct vfio_pci_device *device; struct iova_allocator *iova_allocator; }; @@ -119,7 +120,8 @@ FIXTURE_VARIANT_ADD_ALL_IOMMU_MODES(anonymous_hugetlb_1gb, SZ_1G, MAP_HUGETLB |

FIXTURE_SETUP(vfio_dma_mapping_test) { - self->device = vfio_pci_device_init(device_bdf, variant->iommu_mode); + self->iommu = iommu_init(variant->iommu_mode); + self->device = vfio_pci_device_init(device_bdf, self->iommu); self->iova_allocator = iova_allocator_init(self->device); }

@@ -127,6 +129,7 @@ FIXTURE_TEARDOWN(vfio_dma_mapping_test) { iova_allocator_cleanup(self->iova_allocator); vfio_pci_device_cleanup(self->device); + iommu_cleanup(self->iommu); }

TEST_F(vfio_dma_mapping_test, dma_map_unmap) @@ -203,6 +206,7 @@ TEST_F(vfio_dma_mapping_test, dma_map_unmap) }

FIXTURE(vfio_dma_map_limit_test) { + struct iommu *iommu; struct vfio_pci_device *device; struct vfio_dma_region region; size_t mmap_size; @@ -235,7 +239,8 @@ FIXTURE_SETUP(vfio_dma_map_limit_test) */ self->mmap_size = 2 * region_size;

- self->device = vfio_pci_device_init(device_bdf, variant->iommu_mode); + self->iommu = iommu_init(variant->iommu_mode); + self->device = vfio_pci_device_init(device_bdf, self->iommu); region->vaddr = mmap(NULL, self->mmap_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); ASSERT_NE(region->vaddr, MAP_FAILED); @@ -253,6 +258,7 @@ FIXTURE_SETUP(vfio_dma_map_limit_test) FIXTURE_TEARDOWN(vfio_dma_map_limit_test) { vfio_pci_device_cleanup(self->device); + iommu_cleanup(self->iommu); ASSERT_EQ(munmap(self->region.vaddr, self->mmap_size), 0); }

diff --git a/tools/testing/selftests/vfio/vfio_pci_device_test.c b/tools/testing/selftests/vfio/vfio_pci_device_test.c index 7a270698e4d2..e95217933c6b 100644 --- a/tools/testing/selftests/vfio/vfio_pci_device_test.c +++ b/tools/testing/selftests/vfio/vfio_pci_device_test.c @@ -23,17 +23,20 @@ static const char *device_bdf; #define MAX_TEST_MSI 16U

FIXTURE(vfio_pci_device_test) { + struct iommu *iommu; struct vfio_pci_device *device; };

FIXTURE_SETUP(vfio_pci_device_test) { - self->device = vfio_pci_device_init(device_bdf, default_iommu_mode); + self->iommu = iommu_init(default_iommu_mode); + self->device = vfio_pci_device_init(device_bdf, self->iommu); }

FIXTURE_TEARDOWN(vfio_pci_device_test) { vfio_pci_device_cleanup(self->device); + iommu_cleanup(self->iommu); }

#define read_pci_id_from_sysfs(_file) ({ \ @@ -99,6 +102,7 @@ TEST_F(vfio_pci_device_test, validate_bars) }

FIXTURE(vfio_pci_irq_test) { + struct iommu *iommu; struct vfio_pci_device *device; };

@@ -116,12 +120,14 @@ FIXTURE_VARIANT_ADD(vfio_pci_irq_test, msix) {

FIXTURE_SETUP(vfio_pci_irq_test) { - self->device = vfio_pci_device_init(device_bdf, default_iommu_mode); + self->iommu = iommu_init(default_iommu_mode); + self->device = vfio_pci_device_init(device_bdf, self->iommu); }

FIXTURE_TEARDOWN(vfio_pci_irq_test) { vfio_pci_device_cleanup(self->device); + iommu_cleanup(self->iommu); }

TEST_F(vfio_pci_irq_test, enable_trigger_disable) diff --git a/tools/testing/selftests/vfio/vfio_pci_driver_test.c b/tools/testing/selftests/vfio/vfio_pci_driver_test.c index f69eec8b928d..b0c7d812de1f 100644 --- a/tools/testing/selftests/vfio/vfio_pci_driver_test.c +++ b/tools/testing/selftests/vfio/vfio_pci_driver_test.c @@ -44,6 +44,7 @@ static void region_teardown(struct vfio_pci_device *device, }

FIXTURE(vfio_pci_driver_test) { + struct iommu *iommu; struct vfio_pci_device *device; struct iova_allocator *iova_allocator; struct vfio_dma_region memcpy_region; @@ -73,7 +74,8 @@ FIXTURE_SETUP(vfio_pci_driver_test) { struct vfio_pci_driver *driver;

- self->device = vfio_pci_device_init(device_bdf, variant->iommu_mode); + self->iommu = iommu_init(variant->iommu_mode); + self->device = vfio_pci_device_init(device_bdf, self->iommu); self->iova_allocator = iova_allocator_init(self->device);

driver = &self->device->driver; @@ -113,6 +115,7 @@ FIXTURE_TEARDOWN(vfio_pci_driver_test)

iova_allocator_cleanup(self->iova_allocator); vfio_pci_device_cleanup(self->device); + iommu_cleanup(self->iommu); }

TEST_F(vfio_pci_driver_test, init_remove) @@ -231,18 +234,31 @@ TEST_F_TIMEOUT(vfio_pci_driver_test, memcpy_storm, 60) ASSERT_NO_MSI(self->msi_fd); }

-int main(int argc, char *argv[]) +static bool device_has_selftests_driver(const char *bdf) { struct vfio_pci_device *device; + struct iommu *iommu; + bool has_driver; + + iommu = iommu_init(default_iommu_mode); + device = vfio_pci_device_init(device_bdf, iommu); + + has_driver = !!device->driver.ops; + + vfio_pci_device_cleanup(device); + iommu_cleanup(iommu);

+ return has_driver; +} + +int main(int argc, char *argv[]) +{ device_bdf = vfio_selftests_get_bdf(&argc, argv);

- device = vfio_pci_device_init(device_bdf, default_iommu_mode); - if (!device->driver.ops) { + if (!device_has_selftests_driver(device_bdf)) { fprintf(stderr, "No driver found for device %s\n", device_bdf); return KSFT_SKIP; } - vfio_pci_device_cleanup(device);

return test_harness_run(argc, argv); }