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kvm: x86: Fix kvm_arch_fixup_msi_route for remap-less case

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The AMD IOMMU does not (yet) support interrupt remapping. But
kvm_arch_fixup_msi_route assumes that all implementations do and crashes
when the AMD IOMMU is used in KVM mode.

Fixes: 8b5ed7dffa ("intel_iommu: add support for split irqchip")
Reported-by: Christopher Goldsworthy <christopher.goldsworthy@outlook.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <48ae78d8-58ec-8813-8680-6f407ea46041@siemens.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jan Kiszka 2018-08-27 10:47:51 +02:00 committed by Paolo Bonzini
parent 3829640049
commit 0ea1472dc5
1 changed files with 4 additions and 0 deletions
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4
target/i386/kvm.c
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@ -3669,6 +3669,10 @@ int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
MSIMessage src, dst;
X86IOMMUClass *class = X86_IOMMU_GET_CLASS(iommu);
if (!class->int_remap) {
return 0;
}
src.address = route->u.msi.address_hi;
src.address <<= VTD_MSI_ADDR_HI_SHIFT;
src.address |= route->u.msi.address_lo;