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: Alex Williamson <[email protected]> --- virt/kvm/iommu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
