Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2196481/?format=api
{ "id": 2196481, "url": "http://patchwork.ozlabs.org/api/patches/2196481/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260214034135.220413-4-zhenzhong.duan@intel.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260214034135.220413-4-zhenzhong.duan@intel.com>", "list_archive_url": null, "date": "2026-02-14T03:41:23", "name": "[RFCv2,03/13] vfio/iommufd: Create nesting parent hwpt with IOMMU_HWPT_ALLOC_PASID flag", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9f3bdd5fc4e4db5e201acea2f2ae11ba5c79a60b", "submitter": { "id": 81636, "url": "http://patchwork.ozlabs.org/api/people/81636/?format=api", "name": "Zhenzhong Duan", "email": "zhenzhong.duan@intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260214034135.220413-4-zhenzhong.duan@intel.com/mbox/", "series": [ { "id": 492156, "url": "http://patchwork.ozlabs.org/api/series/492156/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=492156", "date": "2026-02-14T03:41:20", "name": "intel_iommu: Enable PASID support for passthrough device", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/492156/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2196481/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2196481/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256\n header.s=Intel header.b=Q/2KH6Ke;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fCZdM5lqZz1xpY\n\tfor <incoming@patchwork.ozlabs.org>; Sat, 14 Feb 2026 14:43:35 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1vr6Xi-00058G-5j; Fri, 13 Feb 2026 22:42:02 -0500", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <zhenzhong.duan@intel.com>)\n id 1vr6Xg-000581-US\n for qemu-devel@nongnu.org; Fri, 13 Feb 2026 22:42:00 -0500", "from mgamail.intel.com ([198.175.65.12])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <zhenzhong.duan@intel.com>)\n id 1vr6Xf-0008J1-D6\n for qemu-devel@nongnu.org; Fri, 13 Feb 2026 22:42:00 -0500", "from orviesa009.jf.intel.com ([10.64.159.149])\n by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 13 Feb 2026 19:41:59 -0800", "from unknown (HELO gnr-sp-2s-612.sh.intel.com) ([10.112.230.229])\n by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 13 Feb 2026 19:41:55 -0800" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1771040519; x=1802576519;\n h=from:to:cc:subject:date:message-id:in-reply-to:\n references:mime-version:content-transfer-encoding;\n bh=PZiKPHz95BBgPb151LL+6wUcQZZQYeja5VAOu/lm/xE=;\n b=Q/2KH6KedOJNqHqeL+A3P+2qYDl1kD31vUhndRxAWj419mgNL62cLMXu\n HHAiXT1+4up4Ls8Bv4uCozJtx0EgQaJVtT1vpgQdtZIVGfv2OGDwP5pJ4\n iCkdc84PvKUjtbgUuWO3Lrq/fySnN/OVG5oi14xCbwa7OEFfLvUw5tkPz\n w+EbqbY39ZkNzgaoyBWYwsGuJXUhPyOjVDto0QI1jYld9+YukMuDK2Wst\n 7Oirc8pz7R6pakMYXKDCD5KrG7iTA8OSyTfwpOsMNgXUvENPVNcp/uxB+\n 5yuh94VfF9bl1La8zK5kYVmOV2F2Nwvq+AVqyPAtn0zG29sGFeBev/qQ8 A==;", "X-CSE-ConnectionGUID": [ "K7Yh8dHxTRe3H503KlhtUA==", "1mmkvfy0QxGbzWuXnom65A==" ], "X-CSE-MsgGUID": [ "MiQFb6TGRr2Onua7MnG+dQ==", "Hdbcwh/ySymgabw7UlbsMg==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6800,10657,11700\"; a=\"83666812\"", "E=Sophos;i=\"6.21,289,1763452800\"; d=\"scan'208\";a=\"83666812\"", "E=Sophos;i=\"6.21,289,1763452800\"; d=\"scan'208\";a=\"212932951\"" ], "X-ExtLoop1": "1", "From": "Zhenzhong Duan <zhenzhong.duan@intel.com>", "To": "qemu-devel@nongnu.org", "Cc": "alex@shazbot.org, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com,\n jasowang@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com,\n skolothumtho@nvidia.com, joao.m.martins@oracle.com,\n clement.mathieu--drif@eviden.com, kevin.tian@intel.com, yi.l.liu@intel.com,\n xudong.hao@intel.com, Zhenzhong Duan <zhenzhong.duan@intel.com>", "Subject": "[RFCv2 PATCH 03/13] vfio/iommufd: Create nesting parent hwpt with\n IOMMU_HWPT_ALLOC_PASID flag", "Date": "Fri, 13 Feb 2026 22:41:23 -0500", "Message-ID": "<20260214034135.220413-4-zhenzhong.duan@intel.com>", "X-Mailer": "git-send-email 2.47.3", "In-Reply-To": "<20260214034135.220413-1-zhenzhong.duan@intel.com>", "References": "<20260214034135.220413-1-zhenzhong.duan@intel.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=198.175.65.12;\n envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com", "X-Spam_score_int": "-43", "X-Spam_score": "-4.4", "X-Spam_bar": "----", "X-Spam_report": "(-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,\n RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "When both host device and vIOMMU have PASID enabled, then guest may\nsetup pasid attached translation.\n\nWe need to create the nesting parent hwpt with IOMMU_HWPT_ALLOC_PASID\nflag because according to uAPI, any domain attached to the non-PASID\npart of the device must also be flagged, otherwise attaching a PASID\nwill blocked.\n\nIntroduce a vfio_device_get_viommu_flags_pasid_supported() helper to\nfacilitate this implementation.\n\nSigned-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>\n---\n include/hw/vfio/vfio-device.h | 1 +\n hw/vfio/device.c | 11 +++++++++++\n hw/vfio/iommufd.c | 8 +++++++-\n 3 files changed, 19 insertions(+), 1 deletion(-)", "diff": "diff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h\nindex 35a5ec6d92..983eb0ecce 100644\n--- a/include/hw/vfio/vfio-device.h\n+++ b/include/hw/vfio/vfio-device.h\n@@ -268,6 +268,7 @@ void vfio_device_prepare(VFIODevice *vbasedev, VFIOContainer *bcontainer,\n void vfio_device_unprepare(VFIODevice *vbasedev);\n \n bool vfio_device_get_viommu_flags_want_nesting(VFIODevice *vbasedev);\n+bool vfio_device_get_viommu_flags_pasid_supported(VFIODevice *vbasedev);\n bool vfio_device_get_host_iommu_quirk_bypass_ro(VFIODevice *vbasedev,\n uint32_t type, void *caps,\n uint32_t size);\ndiff --git a/hw/vfio/device.c b/hw/vfio/device.c\nindex 973fc35b59..b15ca6ef0a 100644\n--- a/hw/vfio/device.c\n+++ b/hw/vfio/device.c\n@@ -533,6 +533,17 @@ bool vfio_device_get_viommu_flags_want_nesting(VFIODevice *vbasedev)\n return false;\n }\n \n+bool vfio_device_get_viommu_flags_pasid_supported(VFIODevice *vbasedev)\n+{\n+ VFIOPCIDevice *vdev = vfio_pci_from_vfio_device(vbasedev);\n+\n+ if (vdev) {\n+ return !!(pci_device_get_viommu_flags(PCI_DEVICE(vdev)) &\n+ VIOMMU_FLAG_PASID_SUPPORTED);\n+ }\n+ return false;\n+}\n+\n bool vfio_device_get_host_iommu_quirk_bypass_ro(VFIODevice *vbasedev,\n uint32_t type, void *caps,\n uint32_t size)\ndiff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c\nindex 005f97fe25..c408f9151b 100644\n--- a/hw/vfio/iommufd.c\n+++ b/hw/vfio/iommufd.c\n@@ -360,6 +360,7 @@ static bool iommufd_cdev_autodomains_get(VFIODevice *vbasedev,\n VendorCaps caps;\n VFIOIOASHwpt *hwpt;\n uint32_t hwpt_id;\n+ uint8_t max_pasid_log2 = 0;\n int ret;\n \n /* Try to find a domain */\n@@ -405,7 +406,7 @@ static bool iommufd_cdev_autodomains_get(VFIODevice *vbasedev,\n */\n if (!iommufd_backend_get_device_info(vbasedev->iommufd, vbasedev->devid,\n &type, &caps, sizeof(caps), &hw_caps,\n- NULL, errp)) {\n+ &max_pasid_log2, errp)) {\n return false;\n }\n \n@@ -427,6 +428,11 @@ static bool iommufd_cdev_autodomains_get(VFIODevice *vbasedev,\n }\n }\n \n+ if (max_pasid_log2 &&\n+ vfio_device_get_viommu_flags_pasid_supported(vbasedev)) {\n+ flags |= IOMMU_HWPT_ALLOC_PASID;\n+ }\n+\n if (cpr_is_incoming()) {\n hwpt_id = vbasedev->cpr.hwpt_id;\n goto skip_alloc;\n", "prefixes": [ "RFCv2", "03/13" ] }