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-rw-r--r--virt/kvm/iommu.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index 4a340cb..72a130b 100644
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -76,7 +76,9 @@ int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
gfn = slot->base_gfn;
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)
flags |= IOMMU_CACHE;
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