Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-14 08:02:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

KVM: x86: Fix device passthrough when SME is active

Browse Source 
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>
This commit is contained in:
Tom Lendacky 2018-03-08 17:17:31 -06:00 committed by Paolo Bonzini
parent 52be7a467e
commit daaf216c06
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kvm/mmu.c
View File

@ -2770,8 +2770,10 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
else
pte_access &= ~ACC_WRITE_MASK;
if (!kvm_is_mmio_pfn(pfn))
spte |= shadow_me_mask;
spte |= (u64)pfn << PAGE_SHIFT;
spte |= shadow_me_mask;
if (pte_access & ACC_WRITE_MASK) {