github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-04 20:46:48 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: SVM: Do not allow instruction emulation under SEV-ES

Browse Source 
When a guest is running as an SEV-ES guest, it is not possible to emulate
instructions. Add support to prevent instruction emulation.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <f6355ea3024fda0a3eb5eb99c6b62dca10d792bd.1607620209.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Tom Lendacky 2020-12-10 11:09:44 -06:00 committed by Paolo Bonzini
parent 8d4846b9b1
commit bc624d9f1b
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/x86/kvm/svm/svm.c
View File

@ -4157,6 +4157,12 @@ static bool svm_can_emulate_instruction(struct kvm_vcpu *vcpu, void *insn, int i
bool smep, smap, is_user;
unsigned long cr4;
/*
* When the guest is an SEV-ES guest, emulation is not possible.
*/
if (sev_es_guest(vcpu->kvm))
return false;
/*
* Detect and workaround Errata 1096 Fam_17h_00_0Fh.
*