[RFC v2 17/17] x86/sev: Indicate SEV-SNP guest supports Secure AVIC

Neeraj Upadhyay
2025-02-26T09:10:57Z

From: Kishon Vijay Abraham I <kvijayab@amd.com>

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

Signed-off-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
---
Changes since v1:
- No change.

arch/x86/boot/compressed/sev.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index 798fdd3dbd1e..385063ceb89c 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -403,7 +403,8 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code)
* guest kernel, a corresponding bit should be added to the mask.
*/
#define SNP_FEATURES_PRESENT (MSR_AMD64_SNP_DEBUG_SWAP | \
- MSR_AMD64_SNP_SECURE_TSC)
+ MSR_AMD64_SNP_SECURE_TSC | \
+ MSR_AMD64_SNP_SECURE_AVIC)

u64 snp_get_unsupported_features(u64 status)
{
--
2.34.1