Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

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

virt/kvm/iommu.c

+3 −1
Original line number Diff line number Diff line
@@ -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;