From: Tom Dohrmann <[email protected]>
There's no reason to return an error when encountering an page state change
request (PSC request) because that's normal behaviour on the guest's part.
Instead 0 should be returned to cause a VM exit so that userspace can handle
the page state change request.
Link: https://lore.kernel.org/lkml/Y77J7C2E9Xd1QcmZ@notebook/
Signed-off-by: Tom Dohrmann <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>
---
arch/x86/kvm/svm/sev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index d76127f1499a..899c78d03c35 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -4068,7 +4068,7 @@ static int sev_handle_vmgexit_msr_protocol(struct vcpu_svm *svm)
vcpu->run->vmgexit.ghcb_msr = control->ghcb_gpa;
vcpu->arch.complete_userspace_io = snp_complete_psc_msr_protocol;
- ret = -1;
+ ret = 0;
break;
case GHCB_MSR_TERM_REQ: {
u64 reason_set, reason_code;
--
2.38.1