From patchwork Tue Sep 26 09:31:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 145011 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:cae8:0:b0:403:3b70:6f57 with SMTP id r8csp2151655vqu; Tue, 26 Sep 2023 12:42:23 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHFt0NmGRO60hwVB9Zo9fvOqf0f5noAAS3FJ1parbOQEYyGI+X5eWOUZSnmTLWNtiQr4pNn X-Received: by 2002:a05:6358:919d:b0:134:d467:b751 with SMTP id j29-20020a056358919d00b00134d467b751mr59700rwa.21.1695757343321; Tue, 26 Sep 2023 12:42:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1695757343; cv=none; d=google.com; s=arc-20160816; b=mRJ5TH5u2Vk2zd63g+kbdlPKsLUDk6FHoOns7otj8mx4i5PvcL1lQOS1CSgKuYz6u7 0cMrJwuUs90vpWZheUYXEw6QSr5NP0wKsYPZ5RmUMex9e8OJPEbaWv6lYfwJ4A4tSW3U OrmnE7Rgmk0PcXPbgUoIXe+D4F584cXfqLvSJIJ0qYhPcCubDOxSd8JMvVtb5Q84jKsN i10OkIjM3FVGSEtoQQiqnTITv5fEpH1iB6RNmccCnFZLSZaeIcyJiZEfcnevDHBLLbi9 Wewcq/jUPdOExXrq4ETOG4EZ0JYTeqfZzkuZ4M+xCSgPC6j8ZW6PNnwLyPFvveBRg2dV 8oLw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=W+44INTLDs1XlSBHON/3VOQtv3YpADCCgF+hWOX1y1I=; fh=Kv+cxc+457xZThbZHBdHDWxamNAAkIiByoci0wEvMsM=; b=hbIpJ8Se8SsBSBD06lIl9dk0FkQqOq89fxPWOiCric6VvMCxK1ok4T+I3Us5Ks/G5h q2Dd+tzvV3fBSKzeZNrsGF9gtxHuAjaRaWyg1lZgbjsbnLQIXcmDtCwFjaUgjMlTeLZE Hkvi71INZdaiOTza9DVtw7DScx30HuiE9hbFLjodxHHdc0Wx7d6orLr/h+aa24GJtGQm VY/TCSYSCSBjb1dnUvtDNzc+pHeHw7hOebsYYtbT5P/ytZR744CzIi79gXde++fCXl6r JPhBpFZ3oMVoqAPexkIBwnhxzN4AkUYGILDG73gf77e9nJN8tkBPw4EOZRVgMGv6fMQl IQLg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=l60kF5QG; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.36 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from pete.vger.email (pete.vger.email. [23.128.96.36]) by mx.google.com with ESMTPS id bk13-20020a056a02028d00b00584a4a5be67si2736088pgb.520.2023.09.26.12.42.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Sep 2023 12:42:23 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.36 as permitted sender) client-ip=23.128.96.36; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=l60kF5QG; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.36 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by pete.vger.email (Postfix) with ESMTP id 043A08182EE8; Tue, 26 Sep 2023 02:36:13 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at pete.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234236AbjIZJfZ (ORCPT + 27 others); Tue, 26 Sep 2023 05:35:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233940AbjIZJfS (ORCPT ); Tue, 26 Sep 2023 05:35:18 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1ECAFBE; Tue, 26 Sep 2023 02:35:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695720912; x=1727256912; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=pDVskkLMVGFFDFeU0VLYi3kSiq/U4WCUpxivzmmSlTI=; b=l60kF5QGmRTwbY6/FU6Aqy9M67FiY2Bv+wYiSKj/MTfJomHbJ+EbYrw4 fOh4R66mFIAD85NcaMEJ4d638y1620grVUED8GXIIOPH+5EtoInJbsQN/ LRBi48UYTnQzeWP0dwgVLHL79vU3yoJ51tQBZtz+KvJWvTo7raCILn60g T81C3a+gD0EmOmG6bapGbufofHQ6qt3PclRDHC5M2PKFDA+d2krtLiLYl 4h1/bVssU39peP/ZhlfZxRRm+Uf6Z4x597Y2FbR6Z5Lwa4ORmV+OlIL5B mQcb8rJYLktH43ZoFr53Akp2uS1dxz2AloiYat8qFaw0VRza7S5feLzmi w==; X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="412442884" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="412442884" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 02:31:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="725373027" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="725373027" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga006.jf.intel.com with ESMTP; 26 Sep 2023 02:31:24 -0700 From: Yi Liu To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com, robin.murphy@arm.com, baolu.lu@linux.intel.com Cc: joro@8bytes.org, cohuck@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org, mjrosato@linux.ibm.com, chao.p.peng@linux.intel.com, yi.l.liu@intel.com, yi.y.sun@linux.intel.com, peterx@redhat.com, jasowang@redhat.com, shameerali.kolothum.thodi@huawei.com, lulu@redhat.com, suravee.suthikulpanit@amd.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, zhenzhong.duan@intel.com, joao.m.martins@oracle.com Subject: [RFC 1/3] vfio-iommufd: Support pasid [at|de]tach for physical VFIO devices Date: Tue, 26 Sep 2023 02:31:19 -0700 Message-Id: <20230926093121.18676-2-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230926093121.18676-1-yi.l.liu@intel.com> References: <20230926093121.18676-1-yi.l.liu@intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on pete.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (pete.vger.email [0.0.0.0]); Tue, 26 Sep 2023 02:36:13 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778130452236174619 X-GMAIL-MSGID: 1778130452236174619 From: Kevin Tian This adds pasid_at|de]tach_ioas ops for attaching hwpt to pasid of a device and the helpers for it. For now, only vfio-pci supports pasid attach/detach. Signed-off-by: Kevin Tian Signed-off-by: Yi Liu --- drivers/vfio/iommufd.c | 48 +++++++++++++++++++++++++++++++++++++ drivers/vfio/pci/vfio_pci.c | 2 ++ include/linux/vfio.h | 11 +++++++++ 3 files changed, 61 insertions(+) diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c index 82eba6966fa5..43a702b9b4d3 100644 --- a/drivers/vfio/iommufd.c +++ b/drivers/vfio/iommufd.c @@ -119,6 +119,7 @@ int vfio_iommufd_physical_bind(struct vfio_device *vdev, if (IS_ERR(idev)) return PTR_ERR(idev); vdev->iommufd_device = idev; + xa_init(&vdev->pasid_pts); return 0; } EXPORT_SYMBOL_GPL(vfio_iommufd_physical_bind); @@ -127,6 +128,17 @@ void vfio_iommufd_physical_unbind(struct vfio_device *vdev) { lockdep_assert_held(&vdev->dev_set->lock); + if (!xa_empty(&vdev->pasid_pts)) { + void *entry; + unsigned long index; + + xa_for_each(&vdev->pasid_pts, index, entry) { + xa_erase(&vdev->pasid_pts, index); + iommufd_device_pasid_detach(vdev->iommufd_device, index); + } + xa_destroy(&vdev->pasid_pts); + } + if (vdev->iommufd_attached) { iommufd_device_detach(vdev->iommufd_device); vdev->iommufd_attached = false; @@ -168,6 +180,42 @@ void vfio_iommufd_physical_detach_ioas(struct vfio_device *vdev) } EXPORT_SYMBOL_GPL(vfio_iommufd_physical_detach_ioas); +int vfio_iommufd_physical_pasid_attach_ioas(struct vfio_device *vdev, + u32 pasid, u32 *pt_id) +{ + void *entry; + int rc; + + lockdep_assert_held(&vdev->dev_set->lock); + + if (WARN_ON(!vdev->iommufd_device)) + return -EINVAL; + + entry = xa_load(&vdev->pasid_pts, pasid); + if (xa_is_value(entry)) + rc = iommufd_device_pasid_replace(vdev->iommufd_device, pasid, pt_id); + else + rc = iommufd_device_pasid_attach(vdev->iommufd_device, pasid, pt_id); + if (rc) + return rc; + xa_store(&vdev->pasid_pts, pasid, xa_mk_value(*pt_id), GFP_KERNEL); + return 0; +} +EXPORT_SYMBOL_GPL(vfio_iommufd_physical_pasid_attach_ioas); + +void vfio_iommufd_physical_pasid_detach_ioas(struct vfio_device *vdev, u32 pasid) +{ + lockdep_assert_held(&vdev->dev_set->lock); + + if (WARN_ON(!vdev->iommufd_device) || + !xa_is_value(xa_load(&vdev->pasid_pts, pasid))) + return; + + iommufd_device_pasid_detach(vdev->iommufd_device, pasid); + xa_erase(&vdev->pasid_pts, pasid); +} +EXPORT_SYMBOL_GPL(vfio_iommufd_physical_pasid_detach_ioas); + /* * The emulated standard ops mean that vfio_device is going to use the * "mdev path" and will call vfio_pin_pages()/vfio_dma_rw(). Drivers using this diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index cb5b7f865d58..e0198851ffd2 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -142,6 +142,8 @@ static const struct vfio_device_ops vfio_pci_ops = { .unbind_iommufd = vfio_iommufd_physical_unbind, .attach_ioas = vfio_iommufd_physical_attach_ioas, .detach_ioas = vfio_iommufd_physical_detach_ioas, + .pasid_attach_ioas = vfio_iommufd_physical_pasid_attach_ioas, + .pasid_detach_ioas = vfio_iommufd_physical_pasid_detach_ioas, }; static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 454e9295970c..7b06d1bc7cb3 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -66,6 +66,7 @@ struct vfio_device { void (*put_kvm)(struct kvm *kvm); #if IS_ENABLED(CONFIG_IOMMUFD) struct iommufd_device *iommufd_device; + struct xarray pasid_pts; u8 iommufd_attached:1; #endif u8 cdev_opened:1; @@ -83,6 +84,8 @@ struct vfio_device { * bound iommufd. Undo in unbind_iommufd if @detach_ioas is not * called. * @detach_ioas: Opposite of attach_ioas + * @pasid_attach_ioas: The pasid variation of attach_ioas + * @pasid_detach_ioas: Opposite of pasid_attach_ioas * @open_device: Called when the first file descriptor is opened for this device * @close_device: Opposite of open_device * @read: Perform read(2) on device file descriptor @@ -107,6 +110,8 @@ struct vfio_device_ops { void (*unbind_iommufd)(struct vfio_device *vdev); int (*attach_ioas)(struct vfio_device *vdev, u32 *pt_id); void (*detach_ioas)(struct vfio_device *vdev); + int (*pasid_attach_ioas)(struct vfio_device *vdev, u32 pasid, u32 *pt_id); + void (*pasid_detach_ioas)(struct vfio_device *vdev, u32 pasid); int (*open_device)(struct vfio_device *vdev); void (*close_device)(struct vfio_device *vdev); ssize_t (*read)(struct vfio_device *vdev, char __user *buf, @@ -131,6 +136,8 @@ int vfio_iommufd_physical_bind(struct vfio_device *vdev, void vfio_iommufd_physical_unbind(struct vfio_device *vdev); int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id); void vfio_iommufd_physical_detach_ioas(struct vfio_device *vdev); +int vfio_iommufd_physical_pasid_attach_ioas(struct vfio_device *vdev, u32 pasid, u32 *pt_id); +void vfio_iommufd_physical_pasid_detach_ioas(struct vfio_device *vdev, u32 pasid); int vfio_iommufd_emulated_bind(struct vfio_device *vdev, struct iommufd_ctx *ictx, u32 *out_device_id); void vfio_iommufd_emulated_unbind(struct vfio_device *vdev); @@ -158,6 +165,10 @@ vfio_iommufd_get_dev_id(struct vfio_device *vdev, struct iommufd_ctx *ictx) ((int (*)(struct vfio_device *vdev, u32 *pt_id)) NULL) #define vfio_iommufd_physical_detach_ioas \ ((void (*)(struct vfio_device *vdev)) NULL) +#define vfio_iommufd_physical_pasid_attach_ioas \ + ((int (*)(struct vfio_device *vdev, u32 pasid, u32 *pt_id)) NULL) +#define vfio_iommufd_physical_pasid_detach_ioas \ + ((void (*)(struct vfio_device *vdev, u32 pasid)) NULL) #define vfio_iommufd_emulated_bind \ ((int (*)(struct vfio_device *vdev, struct iommufd_ctx *ictx, \ u32 *out_device_id)) NULL)