From nobody Sun Feb 8 11:44:50 2026 Received: from mail-oo1-f74.google.com (mail-oo1-f74.google.com [209.85.161.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A8766277C86 for ; Wed, 4 Feb 2026 01:01:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770166873; cv=none; b=Ufg18Uc8YztykZPTKDlaS6ktgZCF36JBOeHTo2KD0jSA3ZxsPyDmsEMCC2DG6qeRfvWsM9lq0P1AeSCRXlUnaZmzL+1XI9Zux82RZ7qIcxyysr7JP8TGtod3f+htprcr/sCKAo4zy/ykQb0YU9zExC8Iwxt5fxhuu8T8VoyREDo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770166873; c=relaxed/simple; bh=9iQwlJIHXJlRgSNvrGLR8wXlFf/oJocttagfEKyaD4I=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=OrQSrVihJN3yHuRkSbXK+9quE4oNvqiAgVfBXV2wlfyeCcrYIoN74OvM2931gFyPsD9b7tScjxQ+Xuru98OvbzEAg1T4daMC2mknTYkXMZE8GuGzskoGgb3S1gmXAeq8xwINSLithtV06xkyehff1fMZtQFdKS1KqFbI0vWyTSY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--rananta.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=oKO2PWN1; arc=none smtp.client-ip=209.85.161.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--rananta.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="oKO2PWN1" Received: by mail-oo1-f74.google.com with SMTP id 006d021491bc7-66308f16ea0so22619666eaf.0 for ; Tue, 03 Feb 2026 17:01:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1770166870; x=1770771670; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=BiyvR40w7AY7Ci9X5DwiDavarBL0gnsawVId6L6rv0E=; b=oKO2PWN1+irge1WDGyqzrkiw+4ZhwbMQKQSKe5vWY+dmdahLaNA5dxr1pJjuWYAZok kq4cTxswhyYCB+754TW/fTtP4uNsiBTpdITNAjxj6FsPUj5ij9T0B90quyAe5x6YFeCt NQkxV2GX3kXrpNKxX2+wqWORng47CcpMb2nGM/KfU6ftkhuNrPw1R7Hnozc/2MoBSE2Z igKi45cuAktD6oN5ZBK20mvsBRRjsAd7tH/nI+4tHig59jAftKhjUmKqCYDUM+eBD8nR ccRyBj5G9a122KHA12bUZiOIIZ7TKVVU/sFVYo0f5VlYH0gxVGLaKT+CQYakmSTTXuT4 /NPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770166870; x=1770771670; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=BiyvR40w7AY7Ci9X5DwiDavarBL0gnsawVId6L6rv0E=; b=ILwIrTri0MT/1hyzMiBh8dQyGGPuVLWdacc0tSdHW+P7+qlZOpiefzRTnPjKzMv7h7 nqQV24yG0/LQeCj33Nl8AleMni/dP+bzO1K2MxD1h6wTR1aOm1UGTp2cV2myN8EJxr3c yNmJJ1oKASNdNo+qQIyQ6DhjhxEP7mBSCPQMFsDBpArQlIMA+0alfGc2tS1FqceGHBVF 51pZoiZBIFcHiF4E0v+R4aH/oTt4hl4MpfGXC19wxCeewl9/WjOkPZ6toX4RAzJm9vKf v2pE5UIpPVe261Ro82fLm6OHhJNMP/Q8bUlEKwOJhSI4SguysVpME+NW4N6k5FiKVcKD R7mA== X-Forwarded-Encrypted: i=1; AJvYcCVU0hb2vyVK8MXQUBUNh/x9tYGrCtyPnU9y55YMMTRaFOY6RcJIY88MhZGzbim+csqMd6/4HFAlrZNRHQU=@vger.kernel.org X-Gm-Message-State: AOJu0YxQDxZcCNmd/jdwgB+ixc3H8+vDTJYnnrnWWtNehnRJCbEEOYAn vye16vOItnvcwP4nZpJsW6rNB9IjTCSoXWd9psdIlEQKZopwqlVdaPBzgH5B67kM0r99l0WaDk8 7zUv/c5MUzg== X-Received: from iobgw7.prod.google.com ([2002:a05:6602:65c7:b0:95a:49ea:e587]) (user=rananta job=prod-delivery.src-stubby-dispatcher) by 2002:a4a:e844:0:b0:662:c6ea:ceb3 with SMTP id 006d021491bc7-66a20882561mr573596eaf.33.1770166870417; Tue, 03 Feb 2026 17:01:10 -0800 (PST) Date: Wed, 4 Feb 2026 01:00:57 +0000 In-Reply-To: <20260204010057.1079647-1-rananta@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260204010057.1079647-1-rananta@google.com> X-Mailer: git-send-email 2.53.0.rc2.204.g2597b5adb4-goog Message-ID: <20260204010057.1079647-9-rananta@google.com> Subject: [PATCH v3 8/8] vfio: selftests: Add tests to validate SR-IOV UAPI From: Raghavendra Rao Ananta To: David Matlack , Alex Williamson , Alex Williamson Cc: Vipin Sharma , Josh Hilke , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Raghavendra Rao Ananta Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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/selftest= s/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 +=3D vfio_iommufd_setup_test TEST_GEN_PROGS +=3D vfio_pci_device_test TEST_GEN_PROGS +=3D vfio_pci_device_init_perf_test TEST_GEN_PROGS +=3D vfio_pci_driver_test +TEST_GEN_PROGS +=3D vfio_pci_sriov_uapi_test =20 TEST_FILES +=3D scripts/cleanup.sh TEST_FILES +=3D scripts/lib.sh diff --git a/tools/testing/selftests/vfio/vfio_pci_sriov_uapi_test.c b/tool= s/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 =3D vfio_pci_device_alloc(bdf, iommu); + + if (iommu->mode->container_path) + *out_ret =3D container_setup(device, bdf, vf_token); + else + *out_ret =3D 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 =3D sysfs_sriov_totalvfs_get(pf_bdf); + if (nr_vfs <=3D 0) + SKIP(return, "SR-IOV may not be supported by the PF: %s\n", pf_bdf); + + nr_vfs =3D sysfs_sriov_numvfs_get(pf_bdf); + if (nr_vfs !=3D 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 =3D 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 =3D 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 =3D #_iommu_mode, \ + .vf_token =3D (_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 =3D iommu_init(variant->iommu_mode); + pf =3D device_init(pf_bdf, iommu, UUID_1, &ret); + vf =3D 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 =3D iommu_init(variant->iommu_mode); + pf =3D device_init(pf_bdf, iommu, UUID_1, &ret); + device_cleanup(pf); + + vf =3D 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 n= ewly + * 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 =3D iommu_init(variant->iommu_mode); + pf =3D device_init(pf_bdf, iommu, UUID_2, &ret); + vfio_device_set_vf_token(pf->fd, UUID_1); + + vf =3D 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 =3D vfio_selftests_get_bdf(&argc, argv); + return test_harness_run(argc, argv); +} --=20 2.53.0.rc2.204.g2597b5adb4-goog