Add a selftest, vfio_pci_sriov_uapi_test.c, to validate the SR-IOV UAPI, including the following cases, iterating over all the IOMMU modes currently supported: - Setting correct/incorrect/NULL tokens during device init. - Close the PF device immediately after setting the token. - Change/override the PF's token after device init. Signed-off-by: Raghavendra Rao Ananta --- tools/testing/selftests/vfio/Makefile | 1 + .../selftests/vfio/vfio_pci_sriov_uapi_test.c | 200 ++++++++++++++++++ 2 files changed, 201 insertions(+) create mode 100644 tools/testing/selftests/vfio/vfio_pci_sriov_uapi_test.c diff --git a/tools/testing/selftests/vfio/Makefile b/tools/testing/selftests/vfio/Makefile index 120c9fdee5c0..f83b054ed329 100644 --- a/tools/testing/selftests/vfio/Makefile +++ b/tools/testing/selftests/vfio/Makefile @@ -4,6 +4,7 @@ TEST_GEN_PROGS += vfio_iommufd_setup_test TEST_GEN_PROGS += vfio_pci_device_test TEST_GEN_PROGS += vfio_pci_device_init_perf_test TEST_GEN_PROGS += vfio_pci_driver_test +TEST_GEN_PROGS += vfio_pci_sriov_uapi_test TEST_FILES += scripts/cleanup.sh TEST_FILES += scripts/lib.sh diff --git a/tools/testing/selftests/vfio/vfio_pci_sriov_uapi_test.c b/tools/testing/selftests/vfio/vfio_pci_sriov_uapi_test.c new file mode 100644 index 000000000000..9cfbecccb759 --- /dev/null +++ b/tools/testing/selftests/vfio/vfio_pci_sriov_uapi_test.c @@ -0,0 +1,200 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include +#include +#include +#include + +#include + +#include "../kselftest_harness.h" + +#define UUID_1 "52ac9bff-3a88-4fbd-901a-0d767c3b6c97" +#define UUID_2 "88594674-90a0-47a9-aea8-9d9b352ac08a" + +static const char *pf_bdf; + +static int container_setup(struct vfio_pci_device *device, const char *bdf, + const char *vf_token) +{ + vfio_pci_group_setup(device, bdf); + vfio_container_set_iommu(device); + __vfio_pci_group_get_device_fd(device, bdf, vf_token); + + /* The device fd will be -1 in case of mismatched tokens */ + return (device->fd < 0); +} + +static int iommufd_setup(struct vfio_pci_device *device, const char *bdf, + const char *vf_token) +{ + vfio_pci_cdev_open(device, bdf); + return __vfio_device_bind_iommufd(device->fd, + device->iommu->iommufd, vf_token); +} + +static struct vfio_pci_device *device_init(const char *bdf, struct iommu *iommu, + const char *vf_token, int *out_ret) +{ + struct vfio_pci_device *device = vfio_pci_device_alloc(bdf, iommu); + + if (iommu->mode->container_path) + *out_ret = container_setup(device, bdf, vf_token); + else + *out_ret = iommufd_setup(device, bdf, vf_token); + + return device; +} + +static void device_cleanup(struct vfio_pci_device *device) +{ + if (device->fd > 0) + VFIO_ASSERT_EQ(close(device->fd), 0); + + if (device->group_fd) + VFIO_ASSERT_EQ(close(device->group_fd), 0); + + vfio_pci_device_free(device); +} + +FIXTURE(vfio_pci_sriov_uapi_test) { + char *vf_bdf; +}; + +FIXTURE_SETUP(vfio_pci_sriov_uapi_test) +{ + char *vf_driver; + int nr_vfs; + + nr_vfs = sysfs_sriov_totalvfs_get(pf_bdf); + if (nr_vfs <= 0) + SKIP(return, "SR-IOV may not be supported by the PF: %s\n", pf_bdf); + + nr_vfs = sysfs_sriov_numvfs_get(pf_bdf); + if (nr_vfs != 0) + SKIP(return, "SR-IOV already configured for the PF: %s\n", pf_bdf); + + /* Create only one VF for testing */ + sysfs_sriov_numvfs_set(pf_bdf, 1); + self->vf_bdf = sysfs_sriov_vf_bdf_get(pf_bdf, 0); + + /* + * The VF inherits the driver from the PF. + * Ensure this is 'vfio-pci' before proceeding. + */ + vf_driver = sysfs_driver_get(self->vf_bdf); + ASSERT_NE(vf_driver, NULL); + ASSERT_EQ(strcmp(vf_driver, "vfio-pci"), 0); + free(vf_driver); + + printf("Created 1 VF (%s) under the PF: %s\n", self->vf_bdf, pf_bdf); +} + +FIXTURE_TEARDOWN(vfio_pci_sriov_uapi_test) +{ + free(self->vf_bdf); + sysfs_sriov_numvfs_set(pf_bdf, 0); +} + +FIXTURE_VARIANT(vfio_pci_sriov_uapi_test) { + const char *iommu_mode; + char *vf_token; +}; + +#define FIXTURE_VARIANT_ADD_IOMMU_MODE(_iommu_mode, _name, _vf_token) \ +FIXTURE_VARIANT_ADD(vfio_pci_sriov_uapi_test, _iommu_mode ## _ ## _name) { \ + .iommu_mode = #_iommu_mode, \ + .vf_token = (_vf_token), \ +} + +FIXTURE_VARIANT_ADD_ALL_IOMMU_MODES(same_uuid, UUID_1); +FIXTURE_VARIANT_ADD_ALL_IOMMU_MODES(diff_uuid, UUID_2); +FIXTURE_VARIANT_ADD_ALL_IOMMU_MODES(null_uuid, NULL); + +/* + * PF's token is always set with UUID_1 and VF's token is rotated with + * various tokens (including UUID_1 and NULL). + * This asserts if the VF device is successfully created for a match + * in the token or actually fails during a mismatch. + */ +#define ASSERT_VF_CREATION(_ret) do { \ + if (!variant->vf_token || strcmp(UUID_1, variant->vf_token)) { \ + ASSERT_NE((_ret), 0); \ + } else { \ + ASSERT_EQ((_ret), 0); \ + } \ +} while (0) + +/* + * Validate if the UAPI handles correctly and incorrectly set token on the VF. + */ +TEST_F(vfio_pci_sriov_uapi_test, init_token_match) +{ + struct vfio_pci_device *pf; + struct vfio_pci_device *vf; + struct iommu *iommu; + int ret; + + iommu = iommu_init(variant->iommu_mode); + pf = device_init(pf_bdf, iommu, UUID_1, &ret); + vf = device_init(self->vf_bdf, iommu, variant->vf_token, &ret); + + ASSERT_VF_CREATION(ret); + + device_cleanup(vf); + device_cleanup(pf); + iommu_cleanup(iommu); +} + +/* + * After setting a token on the PF, validate if the VF can still set the + * expected token. + */ +TEST_F(vfio_pci_sriov_uapi_test, pf_early_close) +{ + struct vfio_pci_device *pf; + struct vfio_pci_device *vf; + struct iommu *iommu; + int ret; + + iommu = iommu_init(variant->iommu_mode); + pf = device_init(pf_bdf, iommu, UUID_1, &ret); + device_cleanup(pf); + + vf = device_init(self->vf_bdf, iommu, variant->vf_token, &ret); + + ASSERT_VF_CREATION(ret); + + device_cleanup(vf); + iommu_cleanup(iommu); +} + +/* + * After PF device init, override the existing token and validate if the newly + * set token is the one that's active. + */ +TEST_F(vfio_pci_sriov_uapi_test, override_token) +{ + struct vfio_pci_device *pf; + struct vfio_pci_device *vf; + struct iommu *iommu; + int ret; + + iommu = iommu_init(variant->iommu_mode); + pf = device_init(pf_bdf, iommu, UUID_2, &ret); + vfio_device_set_vf_token(pf->fd, UUID_1); + + vf = device_init(self->vf_bdf, iommu, variant->vf_token, &ret); + + ASSERT_VF_CREATION(ret); + + device_cleanup(vf); + device_cleanup(pf); + iommu_cleanup(iommu); +} + +int main(int argc, char *argv[]) +{ + pf_bdf = vfio_selftests_get_bdf(&argc, argv); + return test_harness_run(argc, argv); +} -- 2.53.0.rc2.204.g2597b5adb4-goog