Commit daaf216c authored Mar 08, 2018 by Tom Lendacky Committed by Paolo Bonzini Mar 16, 2018

KVM: x86: Fix device passthrough when SME is active



When using device passthrough with SME active, the MMIO range that is
mapped for the device should not be mapped encrypted.  Add a check in
set_spte() to insure that a page is not mapped encrypted if that page
is a device MMIO page as indicated by kvm_is_mmio_pfn().

Cc: <stable@vger.kernel.org> # 4.14.x-
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 52be7a46

arch/x86/kvm/mmu.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -2770,9 +2770,11 @@ static int set_spte(struct kvm_vcpu vcpu, u64 sptep,
		else
		pte_access &= ~ACC_WRITE_MASK;

		spte \|= (u64)pfn << PAGE_SHIFT;
		if (!kvm_is_mmio_pfn(pfn))
		spte \|= shadow_me_mask;

		spte \|= (u64)pfn << PAGE_SHIFT;

		if (pte_access & ACC_WRITE_MASK) {

		/*