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intel_iommu: support all masks in interrupt entry cache invalidation

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Linux guests do not gracefully handle cases when the invalidation mask
they wanted is not supported, probably because real hardware always
allowed all.

We can just say that all 16 masks are supported, because both
ioapic_iec_notifier and kvm_update_msi_routes_all invalidate all caches.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Radim Krčmář 2016-07-14 13:56:34 +08:00 committed by Michael S. Tsirkin
parent 3f1fea0fb5
commit a3f409cb4a
2 changed files with 2 additions and 1 deletions
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2
hw/i386/intel_iommu.c
View File

@ -2362,7 +2362,7 @@ static void vtd_init(IntelIOMMUState *s)
s->ecap = VTD_ECAP_QI | VTD_ECAP_IRO;
if (x86_iommu->intr_supported) {
s->ecap |= VTD_ECAP_IR | VTD_ECAP_EIM;
s->ecap |= VTD_ECAP_IR | VTD_ECAP_EIM | VTD_ECAP_MHMV;
}
vtd_reset_context_cache(s);

1
hw/i386/intel_iommu_internal.h
View File

@ -186,6 +186,7 @@
/* Interrupt Remapping support */
#define VTD_ECAP_IR (1ULL << 3)
#define VTD_ECAP_EIM (1ULL << 4)
#define VTD_ECAP_MHMV (15ULL << 20)
/* CAP_REG */
/* (offset >> 4) << 24 */