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

[ Upstream commit 0292e169b2d9c8377a168778f0b16eadb1f578fd ]

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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 4569fdc..68c078e 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1060,7 +1060,7 @@ 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;
        }