KVM: pci-assign: do not map smm memory slot pages in vt-d page tables

or VM memory are not put thus leaked in kvm_iommu_unmap_memslots() when
destroy VM.

This is consistent with current vfio implementation.

Signed-off-by: herongguang <herongguang.he@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index ef1aa7f1ed7a569c85a2c3e1a2495cbd98a7da35..88257b311cb579b5b720330456f99fbec97a58ac 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1065,7 +1065,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
         * changes) is disallowed above, so any other attribute changes getting
         * here can be skipped.
         */
-       if ((change == KVM_MR_CREATE) || (change == KVM_MR_MOVE)) {
+       if (as_id == 0 && (change == KVM_MR_CREATE || change == KVM_MR_MOVE)) {
                r = kvm_iommu_map_pages(kvm, &new);
                return r;
        }