Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2219466/?format=api
{ "id": 2219466, "url": "http://patchwork.ozlabs.org/api/patches/2219466/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260403035541.18355-4-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": "<20260403035541.18355-4-zhenzhong.duan@intel.com>", "list_archive_url": null, "date": "2026-04-03T03:55:27", "name": "[v3,03/14] vfio/iommufd: Create nesting parent hwpt with IOMMU_HWPT_ALLOC_PASID flag", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "bb4701b54b18e0a4e6ec92216f5e439d3c5ffc91", "submitter": { "id": 81636, "url": "http://patchwork.ozlabs.org/api/people/81636/?format=api", "name": "Duan, Zhenzhong", "email": "zhenzhong.duan@intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260403035541.18355-4-zhenzhong.duan@intel.com/mbox/", "series": [ { "id": 498583, "url": "http://patchwork.ozlabs.org/api/series/498583/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=498583", "date": "2026-04-03T03:55:36", "name": "intel_iommu: Enable PASID support for passthrough device", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/498583/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219466/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219466/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=G0qJd9iq;\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 4fn4gB5QdHz20wd\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 03 Apr 2026 14:57:26 +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 1w8Vdd-0001Af-Mk; Thu, 02 Apr 2026 23:56:05 -0400", "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 1w8Vdc-00019c-Aq\n for qemu-devel@nongnu.org; Thu, 02 Apr 2026 23:56:04 -0400", "from mgamail.intel.com ([198.175.65.19])\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 1w8Vda-0004MM-KT\n for qemu-devel@nongnu.org; Thu, 02 Apr 2026 23:56:04 -0400", "from fmviesa007.fm.intel.com ([10.60.135.147])\n by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 02 Apr 2026 20:56:01 -0700", "from unknown (HELO gnr-sp-2s-612.sh.intel.com) ([10.112.230.229])\n by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 02 Apr 2026 20:55:58 -0700" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1775188562; x=1806724562;\n h=from:to:cc:subject:date:message-id:in-reply-to:\n references:mime-version:content-transfer-encoding;\n bh=IM87H8/Ait4f6rjlrPdAR7O/TnBajxtINCeU247Vyjw=;\n b=G0qJd9iq0H9/nb2K9GdNMqxE5tBGVZ5MwTxDTRBSqw9DxP8BacG6t9Kw\n Hu3/OVesqnW5Ks9qPmFEMmhKhKs20gXqMnjJyBlXsA7Yn+OuRTEpZZmDN\n 7piM7rx/9nECIwwS1XLyaxRZIB4k56/wbFJYr/mL18oecDPSYMP72/+xE\n QeZkeor1u7UwF6E0JJ1/egCthvRsEDAUqJg5fos+6MUrZyCiOIZM5dxib\n SFWMhOCBACDw+1ERUCZdGzyc3ozZYaBgj1yhdmxCYmVg/17SoMBt//AvN\n 5C/eiDZViArByQnXwexr1M+UAYJAxd/taOKEU39YMcwWfWk3GZVjOmADA g==;", "X-CSE-ConnectionGUID": [ "/nAzXRYpQsKAPD0QgHdEjQ==", "SsTIyR/UR76nqOxEaKClhg==" ], "X-CSE-MsgGUID": [ "7yXnGwL+S3e2/uJmsq5x/w==", "nMO9Arz+QNi6BU94BvPifw==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6800,10657,11747\"; a=\"76140602\"", "E=Sophos;i=\"6.23,157,1770624000\"; d=\"scan'208\";a=\"76140602\"", "E=Sophos;i=\"6.23,157,1770624000\"; d=\"scan'208\";a=\"223884852\"" ], "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@bull.com, kevin.tian@intel.com, yi.l.liu@intel.com,\n xudong.hao@intel.com, Zhenzhong Duan <zhenzhong.duan@intel.com>", "Subject": "[PATCH v3 03/14] vfio/iommufd: Create nesting parent hwpt with\n IOMMU_HWPT_ALLOC_PASID flag", "Date": "Thu, 2 Apr 2026 23:55:27 -0400", "Message-ID": "<20260403035541.18355-4-zhenzhong.duan@intel.com>", "X-Mailer": "git-send-email 2.47.3", "In-Reply-To": "<20260403035541.18355-1-zhenzhong.duan@intel.com>", "References": "<20260403035541.18355-1-zhenzhong.duan@intel.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=198.175.65.19;\n envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com", "X-Spam_score_int": "-48", "X-Spam_score": "-4.9", "X-Spam_bar": "----", "X-Spam_report": "(-4.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.542,\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_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_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 device and vIOMMU have PASID enabled, then guest may setup\npasid attached translation.\n\nVFIO needs to be aware of potential pasid usage and should attach the\nnon-pasid part of pasid-capable device to hwpt flagged with\nIOMMU_HWPT_ALLOC_PASID.\n\nARM SMMU doesn't support IOMMU_HWPT_ALLOC_PASID, only VTD need it. So\nwe can't check the existing vIOMMU flag VIOMMU_FLAG_PASID_SUPPORTED to\ndetermine if set flag IOMMU_HWPT_ALLOC_PASID. Instead, introduce a new\nflag VIOMMU_FLAG_WANT_PASID_ATTACH which will only be exposed by VTD.\n\nSigned-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>\nReviewed-by: Yi Liu <yi.l.liu@intel.com>\nTested-by: Xudong Hao <xudong.hao@intel.com>\n---\n include/hw/core/iommu.h | 1 +\n include/hw/vfio/vfio-device.h | 1 +\n hw/vfio/device.c | 11 +++++++++++\n hw/vfio/iommufd.c | 8 +++++++-\n 4 files changed, 20 insertions(+), 1 deletion(-)", "diff": "diff --git a/include/hw/core/iommu.h b/include/hw/core/iommu.h\nindex bfcd511013..67c575b08c 100644\n--- a/include/hw/core/iommu.h\n+++ b/include/hw/core/iommu.h\n@@ -21,6 +21,7 @@ enum viommu_flags {\n /* vIOMMU needs nesting parent HWPT to create nested HWPT */\n VIOMMU_FLAG_WANT_NESTING_PARENT = BIT_ULL(0),\n VIOMMU_FLAG_PASID_SUPPORTED = BIT_ULL(1),\n+ VIOMMU_FLAG_WANT_PASID_ATTACH = BIT_ULL(2),\n };\n \n /* Host IOMMU quirks. Extracted from host IOMMU capabilities */\ndiff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h\nindex 828a31c006..d6e522f8b8 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_want_pasid_attach(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..bc1d37e776 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_want_pasid_attach(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_WANT_PASID_ATTACH);\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 ecabc33064..ead40b6617 100644\n--- a/hw/vfio/iommufd.c\n+++ b/hw/vfio/iommufd.c\n@@ -363,6 +363,7 @@ 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@@ -408,7 +409,7 @@ 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@@ -430,6 +431,11 @@ static bool iommufd_cdev_autodomains_get(VFIODevice *vbasedev,\n }\n }\n \n+ if (max_pasid_log2 &&\n+ vfio_device_get_viommu_flags_want_pasid_attach(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": [ "v3", "03/14" ] }