[PATCH v4 7/7] x86/sev: Indicate that Alternate Injection is supported in the guest

[Melody Wang <huibo.wang@amd.com>]

Now the Alternate Injection support is complete, add it to the present
SNP features.

Signed-off-by: Melody Wang <huibo.wang@amd.com>
---
 arch/x86/boot/compressed/sev.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index fc2029746c50..ba42a1aee7e9 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -197,6 +197,12 @@ bool sev_es_check_ghcb_fault(unsigned long address)
 #define SNP_FEATURE_SECURE_AVIC		0
 #endif
 
+#ifdef CONFIG_AMD_ALTERNATE_INJ
+#define SNP_FEATURE_ALTERNATE_INJ	MSR_AMD64_SNP_ALTERNATE_INJ
+#else
+#define SNP_FEATURE_ALTERNATE_INJ	0
+#endif
+
 /*
  * SNP_FEATURES_IMPL is the mask of SNP features that are implemented
  * by the guest kernel. As and when a new feature is implemented in the
@@ -204,7 +210,8 @@ bool sev_es_check_ghcb_fault(unsigned long address)
  */
 #define SNP_FEATURES_IMPL	(MSR_AMD64_SNP_DEBUG_SWAP |	\
 				 MSR_AMD64_SNP_SECURE_TSC |	\
-				 SNP_FEATURE_SECURE_AVIC)
+				 SNP_FEATURE_SECURE_AVIC |	\
+				 SNP_FEATURE_ALTERNATE_INJ)
 
 u64 snp_get_unsupported_features(u64 status)
 {
-- 
2.43.0