From nobody Sun Feb 8 14:10:32 2026 Received: from mail-oo1-f73.google.com (mail-oo1-f73.google.com [209.85.161.73]) (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 9A87A246797 for ; Wed, 4 Feb 2026 01:01:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770166869; cv=none; b=RR0wemHtP3xjIhTtQZF3Zab4I5yrEx4ny0t5+tJ58f0685tXVaLd28B5rlFAaqtmB3jizBtnQ66EwRLPAxyx0DEZEiTzjYSopu1/qfW2bcmCrFRIuu2jMzVSdlGjiZ+LGptfjDLA9d4XJWHKR9bKSi4wsjM+zGd6ESTD+D5t2zs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770166869; c=relaxed/simple; bh=meRWmIXrY31FrBFGb8YW9mRyiEhUcftdtXX5LNfWTdo=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=qpXrPXrPIXI7YgS942wBUNQ3YF5d7bNcFCNdXlBnSvCUTDr4WZTHhvwDApm1NraAduSdn0bQxaajmtKy6GLH0VA4gi7hTcaSDMoq2Ohg/3pSv3SMLzDJtzIE5OkEPo1evlCsehDeF8FjdaDBFSJjVTqGGgrHKRokVYvzAQwcChU= 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=S5w9sgOK; arc=none smtp.client-ip=209.85.161.73 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="S5w9sgOK" Received: by mail-oo1-f73.google.com with SMTP id 006d021491bc7-6640dc1ca05so17443686eaf.1 for ; Tue, 03 Feb 2026 17:01:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1770166866; x=1770771666; 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=9PsrwmgPvoL3V2W1GGLMcJD/aNZYUylwYoW0T18FZqw=; b=S5w9sgOK3pJ5wEqsb3fsZ6i0+DUDF+s9aP8G8uEO+IKjeai2S8xuWjaBvv+nWjGozb AU2h8QVwJG77vuAepCor0bnBdFD9oiE3ZjGY3x8w23ywF9HSq1a5srxVj5slEqij6WxX ijnip9dthxZ6ldboDhLq+bES5urq/CkuB0ks0l22CqKvXYXiR9Q9TjRX36DeB4rYp1/3 d4x14RNCl42H2Zqa6nW0quBCJ3aK3miSzwY3iHfrGuXmaO2S9AIdOXRWbWRb8AjQSJvt vMdkMVuOiJiKMmvsxtJDUyp701E9CwFlvrJdwyRl73M5AcMzkLYw0wzTi2XyTYVJaFJo dR1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770166866; x=1770771666; 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=9PsrwmgPvoL3V2W1GGLMcJD/aNZYUylwYoW0T18FZqw=; b=VrZcPwV4i0GByj+evjHa8x/zmcnt5SIM6SooNkP9accokJEB7bqt2EuOiOgd6cS5l4 O/4r2aAAiOU9giEEv9RYE27DyC+Y/Z6QaDuwMlbaltXkhOC6OM+4221p4mkZqKtQe85T cnJMBIqNWzhpv0Mpfn2WBqOhb9GkseAgGmc3tnSr9tBb0x4gbI4yDgJb3IDonPPfOEw2 Dl6A3ryuLJkiO6sKHwiVCHEEtL0flNWRecIFQQLAHtpdJTQZ5RJ5HvXqMzHOr0vdLC2D 3RQ+9fW3wSfQsRjawKqVwoELnVzYKiVaucYKkV5jcC0YkC+7DmAx6G5IDpZbhOD5SwKZ EvOA== X-Forwarded-Encrypted: i=1; AJvYcCU3W/2YywK5wBscE/FN+NQf7jVtMgcx+N+xvtJ7pQ/cUp0ERRvtW4kkSgn+M77GVb9Gx7tdr4PJTP/ZI7s=@vger.kernel.org X-Gm-Message-State: AOJu0YzufZ0npoJsz8A3xNuH+R2QOLedanf/knwKK7GTc1CPakDZcTGs RYImjeBQqVdRNXTSYSxOCy9TQUZcPFCx6k/XXVVa7efRTqWvGCnKDD4FyjquKgFckatzTgUUyyH CutIf6UGmNA== X-Received: from ioda14-n1.prod.google.com ([2002:a05:6602:204e:10b0:957:4ce0:f83c]) (user=rananta job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6820:4a10:b0:663:c86:e9de with SMTP id 006d021491bc7-66a203a4c11mr550864eaf.20.1770166866231; Tue, 03 Feb 2026 17:01:06 -0800 (PST) Date: Wed, 4 Feb 2026 01:00:53 +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: <20260204010057.1079647-5-rananta@google.com> Subject: [PATCH v3 4/8] vfio: selftests: Extend container/iommufd setup for passing vf_token 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" A UUID is normally set as a vf_token to correspond the VFs with the PFs, if they are both bound by the vfio-pci driver. This is true for iommufd-based approach and container-based approach. The token can be set either during device creation (VFIO_GROUP_GET_DEVICE_FD) in container-based approach or during iommu bind (VFIO_DEVICE_BIND_IOMMUFD) in the iommu-fd case. Hence extend the functions, vfio_pci_iommufd_setup() and vfio_pci_container_setup(), to accept vf_token as an (optional) argument and handle the necessary setup. No functional changes are expected. Signed-off-by: Raghavendra Rao Ananta --- tools/testing/selftests/vfio/Makefile | 2 + .../selftests/vfio/lib/vfio_pci_device.c | 45 +++++++++++++++---- 2 files changed, 39 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/vfio/Makefile b/tools/testing/selftest= s/vfio/Makefile index e8f9023cf247..120c9fdee5c0 100644 --- a/tools/testing/selftests/vfio/Makefile +++ b/tools/testing/selftests/vfio/Makefile @@ -20,6 +20,8 @@ CFLAGS +=3D $(EXTRA_CFLAGS) =20 LDFLAGS +=3D -pthread =20 +LDLIBS +=3D -luuid + $(TEST_GEN_PROGS): %: %.o $(LIBVFIO_O) $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $< $(LIBVFIO_O) $(LDLIBS) -o $@ =20 diff --git a/tools/testing/selftests/vfio/lib/vfio_pci_device.c b/tools/tes= ting/selftests/vfio/lib/vfio_pci_device.c index a7e00d017fc6..4c79557cc4e0 100644 --- a/tools/testing/selftests/vfio/lib/vfio_pci_device.c +++ b/tools/testing/selftests/vfio/lib/vfio_pci_device.c @@ -12,6 +12,7 @@ #include =20 #include +#include #include #include #include @@ -199,7 +200,27 @@ static void vfio_pci_group_setup(struct vfio_pci_devic= e *device, const char *bdf ioctl_assert(device->group_fd, VFIO_GROUP_SET_CONTAINER, &device->iommu->= container_fd); } =20 -static void vfio_pci_container_setup(struct vfio_pci_device *device, const= char *bdf) +static void vfio_pci_group_get_device_fd(struct vfio_pci_device *device, + const char *bdf, const char *vf_token) +{ + char arg[64]; + + /* + * If a vf_token exists, argument to VFIO_GROUP_GET_DEVICE_FD + * will be in the form of the following example: + * "0000:04:10.0 vf_token=3Dbd8d9d2b-5a5f-4f5a-a211-f591514ba1f3" + */ + if (vf_token) + snprintf_assert(arg, ARRAY_SIZE(arg), "%s vf_token=3D%s", bdf, vf_token); + else + snprintf_assert(arg, ARRAY_SIZE(arg), "%s", bdf); + + device->fd =3D ioctl(device->group_fd, VFIO_GROUP_GET_DEVICE_FD, arg); + VFIO_ASSERT_GE(device->fd, 0); +} + +static void vfio_pci_container_setup(struct vfio_pci_device *device, + const char *bdf, const char *vf_token) { struct iommu *iommu =3D device->iommu; unsigned long iommu_type =3D iommu->mode->iommu_type; @@ -217,8 +238,7 @@ static void vfio_pci_container_setup(struct vfio_pci_de= vice *device, const char */ (void)ioctl(iommu->container_fd, VFIO_SET_IOMMU, (void *)iommu_type); =20 - device->fd =3D ioctl(device->group_fd, VFIO_GROUP_GET_DEVICE_FD, bdf); - VFIO_ASSERT_GE(device->fd, 0); + vfio_pci_group_get_device_fd(device, bdf, vf_token); } =20 static void vfio_pci_device_setup(struct vfio_pci_device *device) @@ -279,12 +299,20 @@ const char *vfio_pci_get_cdev_path(const char *bdf) return cdev_path; } =20 -static void vfio_device_bind_iommufd(int device_fd, int iommufd) +static void vfio_device_bind_iommufd(int device_fd, int iommufd, + const char *vf_token) { struct vfio_device_bind_iommufd args =3D { .argsz =3D sizeof(args), .iommufd =3D iommufd, }; + uuid_t token_uuid; + + if (vf_token) { + VFIO_ASSERT_EQ(uuid_parse(vf_token, token_uuid), 0); + args.flags |=3D VFIO_DEVICE_BIND_FLAG_TOKEN; + args.token_uuid_ptr =3D (u64)token_uuid; + } =20 ioctl_assert(device_fd, VFIO_DEVICE_BIND_IOMMUFD, &args); } @@ -299,7 +327,8 @@ static void vfio_device_attach_iommufd_pt(int device_fd= , u32 pt_id) ioctl_assert(device_fd, VFIO_DEVICE_ATTACH_IOMMUFD_PT, &args); } =20 -static void vfio_pci_iommufd_setup(struct vfio_pci_device *device, const c= har *bdf) +static void vfio_pci_iommufd_setup(struct vfio_pci_device *device, + const char *bdf, const char *vf_token) { const char *cdev_path =3D vfio_pci_get_cdev_path(bdf); =20 @@ -307,7 +336,7 @@ static void vfio_pci_iommufd_setup(struct vfio_pci_devi= ce *device, const char *b VFIO_ASSERT_GE(device->fd, 0); free((void *)cdev_path); =20 - vfio_device_bind_iommufd(device->fd, device->iommu->iommufd); + vfio_device_bind_iommufd(device->fd, device->iommu->iommufd, vf_token); vfio_device_attach_iommufd_pt(device->fd, device->iommu->ioas_id); } =20 @@ -323,9 +352,9 @@ struct vfio_pci_device *vfio_pci_device_init(const char= *bdf, struct iommu *iomm device->bdf =3D bdf; =20 if (iommu->mode->container_path) - vfio_pci_container_setup(device, bdf); + vfio_pci_container_setup(device, bdf, NULL); else - vfio_pci_iommufd_setup(device, bdf); + vfio_pci_iommufd_setup(device, bdf, NULL); =20 vfio_pci_device_setup(device); vfio_pci_driver_probe(device); --=20 2.53.0.rc2.204.g2597b5adb4-goog