[PULL,v3,76/81] intel-iommu: don't warn guest errors when getting rid2pasid entry

Commit Message

Michael S. Tsirkin Nov. 5, 2022, 5:19 p.m. UTC

From: Jason Wang <[e-mail]>

We use to warn on wrong rid2pasid entry. But this error could be
triggered by the guest and could happens during initialization. So
let's don't warn in this case.

Reviewed-by: Peter Xu <[e-mail]>
Signed-off-by: Jason Wang <[e-mail]>
Message-Id: <[e-mail]>
Reviewed-by: Michael S. Tsirkin <[e-mail]>
Signed-off-by: Michael S. Tsirkin <[e-mail]>
Reviewed-by: Yi Liu <[e-mail]>
---
 hw/i386/intel_iommu.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

Patch

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 6524c2ee32..271de995be 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -1554,8 +1554,10 @@  static bool vtd_dev_pt_enabled(IntelIOMMUState *s, VTDContextEntry *ce)
     if (s->root_scalable) {
         ret = vtd_ce_get_rid2pasid_entry(s, ce, &pe);
         if (ret) {
-            error_report_once("%s: vtd_ce_get_rid2pasid_entry error: %"PRId32,
-                              __func__, ret);
+            /*
+             * This error is guest triggerable. We should assumt PT
+             * not enabled for safety.
+             */
             return false;
         }
         return (VTD_PE_GET_TYPE(&pe) == VTD_SM_PASID_ENTRY_PT);
@@ -1569,14 +1571,12 @@  static bool vtd_as_pt_enabled(VTDAddressSpace *as)
 {
     IntelIOMMUState *s;
     VTDContextEntry ce;
-    int ret;
 
     assert(as);
 
     s = as->iommu_state;
-    ret = vtd_dev_to_context_entry(s, pci_bus_num(as->bus),
-                                   as->devfn, &ce);
-    if (ret) {
+    if (vtd_dev_to_context_entry(s, pci_bus_num(as->bus), as->devfn,
+                                 &ce)) {
         /*
          * Possibly failed to parse the context entry for some reason
          * (e.g., during init, or any guest configuration errors on