[PATCH v12 19/19] x86/sev: Allow Secure TSC feature for SNP guests

From: Nikunj A Dadhania
Date: Wed Oct 09 2024 - 05:36:15 EST


Now that all the required plumbing is done for enabling SNP Secure TSC
feature, add Secure TSC to SNP features present list.

Signed-off-by: Nikunj A Dadhania <nikunj@xxxxxxx>
Tested-by: Peter Gonda <pgonda@xxxxxxxxxx>
Reviewed-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
---
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 cd44e120fe53..bb55934c1cee 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -401,7 +401,8 @@ 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_TSC)

u64 snp_get_unsupported_features(u64 status)
{
--
2.34.1