[RFC 14/14] x86/sev: Indicate SEV-SNP guest supports Secure AVIC

From: Neeraj Upadhyay
Date: Fri Sep 13 2024 - 07:42:02 EST


From: Kishon Vijay Abraham I <kvijayab@xxxxxxx>

Now that Secure AVIC support is added in the guest, indicate SEV-SNP
guest supports Secure AVIC.

Without this, the guest terminates booting with Non-Automatic Exit(NAE)
termination request event.

Signed-off-by: Kishon Vijay Abraham I <kvijayab@xxxxxxx>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@xxxxxxx>
---
arch/x86/boot/compressed/sev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index ec038be0a048..fa5f1dc94e2b 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -402,7 +402,7 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code)
* by the guest kernel. As and when a new feature is implemented in the
* guest kernel, a corresponding bit should be added to the mask.
*/
-#define SNP_FEATURES_PRESENT MSR_AMD64_SNP_DEBUG_SWAP
+#define SNP_FEATURES_PRESENT (MSR_AMD64_SNP_DEBUG_SWAP | MSR_AMD64_SNP_SECURE_AVIC_ENABLED)

u64 snp_get_unsupported_features(u64 status)
{
--
2.34.1