Commit d47510e2 authored by Alex Williamson's avatar Alex Williamson Committed by Gleb Natapov

kvm: Obey read-only mappings in iommu

We've been ignoring read-only mappings and programming everything
into the iommu as read-write.  Fix this to only include the write
access flag when read-only is not set.
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
parent 261874b0
...@@ -76,7 +76,9 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot) ...@@ -76,7 +76,9 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
gfn = slot->base_gfn; gfn = slot->base_gfn;
end_gfn = gfn + slot->npages; end_gfn = gfn + slot->npages;
flags = IOMMU_READ | IOMMU_WRITE; flags = IOMMU_READ;
if (!(slot->flags & KVM_MEM_READONLY))
flags |= IOMMU_WRITE;
if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY) if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)
flags |= IOMMU_CACHE; flags |= IOMMU_CACHE;
......
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