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kvm/x86: Convert iommu_flags to iommu_noncoherent

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Default to operating in coherent mode.  This simplifies the logic when
we switch to a model of registering and unregistering noncoherent I/O
with KVM.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alex Williamson
2013-10-30 11:02:23 -06:00
committed by Paolo Bonzini
parent ec53500fae
commit d96eb2c6f4
6 changed files with 12 additions and 15 deletions
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2
arch/x86/kvm/vmx.c
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@@ -7446,7 +7446,7 @@ static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
if (is_mmio)
ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT;
else if (vcpu->kvm->arch.iommu_domain &&
!(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY))
vcpu->kvm->arch.iommu_noncoherent)
ret = kvm_get_guest_memory_type(vcpu, gfn) <<
VMX_EPT_MT_EPTE_SHIFT;
else

2
arch/x86/kvm/x86.c
View File

@@ -2719,7 +2719,7 @@ static void wbinvd_ipi(void *garbage)
static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu)
{
return vcpu->kvm->arch.iommu_domain &&
!(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY);
vcpu->kvm->arch.iommu_noncoherent;
}
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)