intel_iommu: Do not report recoverable faults to host
Signed-off-by: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com> Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20260208082252.288-1-clement.mathieu--drif@eviden.com>
Clement Mathieu--Drif committed
Feb 8, 2026 at 08:22 UTC
a6e6a91c2ad1d5c9a770997a2ac3aad46a8e418c
1 file changed
+24
-2
hw/i386/intel_iommu.c
+24
-2
@@ -1857,6 +1857,21 @@ static const bool vtd_qualified_faults[] = {
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[VTD_FR_MAX] = false,
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};
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+static const bool vtd_recoverable_faults[] = {
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+ [VTD_FR_WRITE] = true,
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+ [VTD_FR_READ] = true,
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+ [VTD_FR_PASID_DIR_ENTRY_P] = true,
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+ [VTD_FR_PASID_ENTRY_P] = true,
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+ [VTD_FR_FS_PAGING_ENTRY_INV] = true,
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+ [VTD_FR_FS_PAGING_ENTRY_P] = true,
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+ [VTD_FR_FS_PAGING_ENTRY_RSVD] = true,
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+ [VTD_FR_PASID_ENTRY_FSPTPTR_INV] = true,
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+ [VTD_FR_FS_NON_CANONICAL] = true,
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+ [VTD_FR_FS_PAGING_ENTRY_US] = true,
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+ [VTD_FR_SM_WRITE] = true,
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+ [VTD_FR_MAX] = false,
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+};
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+
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/* To see if a fault condition is "qualified", which is reported to software
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* only if the FPD field in the context-entry used to process the faulting
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* request is 0.
@@ -1866,6 +1881,11 @@ static inline bool vtd_is_qualified_fault(VTDFaultReason fault)
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return vtd_qualified_faults[fault];
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}
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+static inline bool vtd_is_recoverable_fault(VTDFaultReason fault, int iommu_idx)
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+{
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+ return iommu_idx == VTD_IDX_ATS && vtd_recoverable_faults[fault];
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+}
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+
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static inline bool vtd_is_interrupt_addr(hwaddr addr)
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{
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return VTD_INTERRUPT_ADDR_FIRST <= addr && addr <= VTD_INTERRUPT_ADDR_LAST;
@@ -2237,8 +2257,10 @@ static bool vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus,
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}
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if (ret_fr) {
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- vtd_report_fault(s, -ret_fr, is_fpd_set, source_id,
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- addr, is_write, pasid != PCI_NO_PASID, pasid);
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+ if (!vtd_is_recoverable_fault(-ret_fr, iommu_idx)) {
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+ vtd_report_fault(s, -ret_fr, is_fpd_set, source_id,
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+ addr, is_write, pasid != PCI_NO_PASID, pasid);
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+ }
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goto error;
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}
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