{"id":2196484,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2196484/?format=json","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.0/projects/14/?format=json","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":""},"msgid":"<20260214034135.220413-5-zhenzhong.duan@intel.com>","date":"2026-02-14T03:41:24","name":"[RFCv2,04/13] intel_iommu: Create the nested hwpt with IOMMU_HWPT_ALLOC_PASID flag","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"e2b5c674dd8b6f87748e5e2f5d4a4a048a244451","submitter":{"id":81636,"url":"http://patchwork.ozlabs.org/api/1.0/people/81636/?format=json","name":"Duan, Zhenzhong","email":"zhenzhong.duan@intel.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260214034135.220413-5-zhenzhong.duan@intel.com/mbox/","series":[{"id":492156,"url":"http://patchwork.ozlabs.org/api/1.0/series/492156/?format=json","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/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2196484/checks/","tags":{},"headers":{"Return-Path":"","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=csV6RbBy;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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a=\"83666820\"","E=Sophos;i=\"6.21,289,1763452800\"; d=\"scan'208\";a=\"83666820\"","E=Sophos;i=\"6.21,289,1763452800\"; d=\"scan'208\";a=\"212933004\""],"X-ExtLoop1":"1","From":"Zhenzhong Duan ","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 ","Subject":"[RFCv2 PATCH 04/13] intel_iommu: Create the nested hwpt with\n IOMMU_HWPT_ALLOC_PASID flag","Date":"Fri, 13 Feb 2026 22:41:24 -0500","Message-ID":"<20260214034135.220413-5-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 ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"When pasid is enabled, any hwpt attached to non-PASID or PASID should be\nIOMMU_HWPT_ALLOC_PASID flagged, or else attachment fails.\n\nChange vtd_destroy_old_fs_hwpt() to pass in 'VTDHostIOMMUDevice *' for\nnaming consistency.\n\nSigned-off-by: Zhenzhong Duan \n---\n hw/i386/intel_iommu_accel.c | 18 +++++++++++-------\n 1 file changed, 11 insertions(+), 7 deletions(-)","diff":"diff --git a/hw/i386/intel_iommu_accel.c b/hw/i386/intel_iommu_accel.c\nindex 45c08c8f6f..c2757f3bcd 100644\n--- a/hw/i386/intel_iommu_accel.c\n+++ b/hw/i386/intel_iommu_accel.c\n@@ -69,11 +69,13 @@ VTDHostIOMMUDevice *vtd_find_hiod_iommufd(VTDAddressSpace *as)\n return NULL;\n }\n \n-static bool vtd_create_fs_hwpt(HostIOMMUDeviceIOMMUFD *idev,\n+static bool vtd_create_fs_hwpt(VTDHostIOMMUDevice *vtd_hiod,\n VTDPASIDEntry *pe, uint32_t *fs_hwpt_id,\n Error **errp)\n {\n+ HostIOMMUDeviceIOMMUFD *idev = HOST_IOMMU_DEVICE_IOMMUFD(vtd_hiod->hiod);\n struct iommu_hwpt_vtd_s1 vtd = {};\n+ uint32_t flags = vtd_hiod->iommu_state->pasid ? IOMMU_HWPT_ALLOC_PASID : 0;\n \n vtd.flags = (VTD_SM_PASID_ENTRY_SRE(pe) ? IOMMU_VTD_S1_SRE : 0) |\n (VTD_SM_PASID_ENTRY_WPE(pe) ? IOMMU_VTD_S1_WPE : 0) |\n@@ -82,13 +84,15 @@ static bool vtd_create_fs_hwpt(HostIOMMUDeviceIOMMUFD *idev,\n vtd.pgtbl_addr = (uint64_t)vtd_pe_get_fspt_base(pe);\n \n return iommufd_backend_alloc_hwpt(idev->iommufd, idev->devid, idev->hwpt_id,\n- 0, IOMMU_HWPT_DATA_VTD_S1, sizeof(vtd),\n- &vtd, fs_hwpt_id, errp);\n+ flags, IOMMU_HWPT_DATA_VTD_S1,\n+ sizeof(vtd), &vtd, fs_hwpt_id, errp);\n }\n \n-static void vtd_destroy_old_fs_hwpt(HostIOMMUDeviceIOMMUFD *idev,\n+static void vtd_destroy_old_fs_hwpt(VTDHostIOMMUDevice *vtd_hiod,\n VTDAddressSpace *vtd_as)\n {\n+ HostIOMMUDeviceIOMMUFD *idev = HOST_IOMMU_DEVICE_IOMMUFD(vtd_hiod->hiod);\n+\n if (!vtd_as->fs_hwpt_id) {\n return;\n }\n@@ -116,7 +120,7 @@ static bool vtd_device_attach_iommufd(VTDHostIOMMUDevice *vtd_hiod,\n }\n \n if (vtd_pe_pgtt_is_fst(pe)) {\n- if (!vtd_create_fs_hwpt(idev, pe, &hwpt_id, errp)) {\n+ if (!vtd_create_fs_hwpt(vtd_hiod, pe, &hwpt_id, errp)) {\n return false;\n }\n }\n@@ -126,7 +130,7 @@ static bool vtd_device_attach_iommufd(VTDHostIOMMUDevice *vtd_hiod,\n trace_vtd_device_attach_hwpt(idev->devid, vtd_as->pasid, hwpt_id, ret);\n if (ret) {\n /* Destroy old fs_hwpt if it's a replacement */\n- vtd_destroy_old_fs_hwpt(idev, vtd_as);\n+ vtd_destroy_old_fs_hwpt(vtd_hiod, vtd_as);\n if (vtd_pe_pgtt_is_fst(pe)) {\n vtd_as->fs_hwpt_id = hwpt_id;\n }\n@@ -161,7 +165,7 @@ static bool vtd_device_detach_iommufd(VTDHostIOMMUDevice *vtd_hiod,\n }\n \n if (ret) {\n- vtd_destroy_old_fs_hwpt(idev, vtd_as);\n+ vtd_destroy_old_fs_hwpt(vtd_hiod, vtd_as);\n }\n \n return ret;\n","prefixes":["RFCv2","04/13"]}