From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Wed, 27 May 2026 05:46:42 +0000 (-0400)
Subject: intel_iommu: Create the nested hwpt with IOMMU_HWPT_ALLOC_PASID flag
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=76330797b0eab06ebe2cbf5c8a21953da71ba4ba;p=thirdparty%2Fqemu.git

intel_iommu: Create the nested hwpt with IOMMU_HWPT_ALLOC_PASID flag

When pasid is enabled, any hwpt attached to non-PASID or PASID should be
IOMMU_HWPT_ALLOC_PASID flagged, or else attachment fails.

Change vtd_destroy_old_fs_hwpt() to pass in 'VTDHostIOMMUDevice *' for
naming consistency.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Clement Mathieu--Drif <clement.mathieu--drif@bull.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Xudong Hao <xudong.hao@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20260527054658.1021096-5-zhenzhong.duan@intel.com>
---

diff --git a/hw/i386/intel_iommu_accel.c b/hw/i386/intel_iommu_accel.c
index 3beadab035..6a12cdac10 100644
--- a/hw/i386/intel_iommu_accel.c
+++ b/hw/i386/intel_iommu_accel.c
@@ -69,11 +69,13 @@ VTDHostIOMMUDevice *vtd_find_hiod_iommufd(VTDAddressSpace *as)
     return NULL;
 }
 
-static bool vtd_create_fs_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,
+static bool vtd_create_fs_hwpt(VTDHostIOMMUDevice *vtd_hiod,
                                VTDPASIDEntry *pe, uint32_t *fs_hwpt_id,
                                Error **errp)
 {
+    HostIOMMUDeviceIOMMUFD *hiodi = HOST_IOMMU_DEVICE_IOMMUFD(vtd_hiod->hiod);
     struct iommu_hwpt_vtd_s1 vtd = {};
+    uint32_t flags = vtd_hiod->iommu_state->pasid ? IOMMU_HWPT_ALLOC_PASID : 0;
 
     vtd.flags = (VTD_SM_PASID_ENTRY_SRE(pe) ? IOMMU_VTD_S1_SRE : 0) |
                 (VTD_SM_PASID_ENTRY_WPE(pe) ? IOMMU_VTD_S1_WPE : 0) |
@@ -82,13 +84,16 @@ static bool vtd_create_fs_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,
     vtd.pgtbl_addr = (uint64_t)vtd_pe_get_fspt_base(pe);
 
     return iommufd_backend_alloc_hwpt(hiodi->iommufd, hiodi->devid,
-                                      hiodi->hwpt_id, 0, IOMMU_HWPT_DATA_VTD_S1,
-                                      sizeof(vtd), &vtd, fs_hwpt_id, errp);
+                                      hiodi->hwpt_id, flags,
+                                      IOMMU_HWPT_DATA_VTD_S1, sizeof(vtd), &vtd,
+                                      fs_hwpt_id, errp);
 }
 
-static void vtd_destroy_old_fs_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,
+static void vtd_destroy_old_fs_hwpt(VTDHostIOMMUDevice *vtd_hiod,
                                     VTDAddressSpace *vtd_as)
 {
+    HostIOMMUDeviceIOMMUFD *hiodi = HOST_IOMMU_DEVICE_IOMMUFD(vtd_hiod->hiod);
+
     if (!vtd_as->fs_hwpt_id) {
         return;
     }
@@ -116,7 +121,7 @@ static bool vtd_device_attach_iommufd(VTDHostIOMMUDevice *vtd_hiod,
     }
 
     if (vtd_pe_pgtt_is_fst(pe)) {
-        if (!vtd_create_fs_hwpt(hiodi, pe, &hwpt_id, errp)) {
+        if (!vtd_create_fs_hwpt(vtd_hiod, pe, &hwpt_id, errp)) {
             return false;
         }
     }
@@ -126,7 +131,7 @@ static bool vtd_device_attach_iommufd(VTDHostIOMMUDevice *vtd_hiod,
     trace_vtd_device_attach_hwpt(hiodi->devid, IOMMU_NO_PASID, hwpt_id, ret);
     if (ret) {
         /* Destroy old fs_hwpt if it's a replacement */
-        vtd_destroy_old_fs_hwpt(hiodi, vtd_as);
+        vtd_destroy_old_fs_hwpt(vtd_hiod, vtd_as);
         if (vtd_pe_pgtt_is_fst(pe)) {
             vtd_as->fs_hwpt_id = hwpt_id;
         }
@@ -161,7 +166,7 @@ static bool vtd_device_detach_iommufd(VTDHostIOMMUDevice *vtd_hiod,
     }
 
     if (ret) {
-        vtd_destroy_old_fs_hwpt(hiodi, vtd_as);
+        vtd_destroy_old_fs_hwpt(vtd_hiod, vtd_as);
     }
 
     return ret;