Commit 0563ee35 authored by Nikunj A Dadhania's avatar Nikunj A Dadhania Committed by Borislav Petkov (AMD)
Browse files

x86/sev: Add the Secure TSC feature for SNP guests 



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

Signed-off-by: default avatarNikunj A Dadhania <nikunj@amd.com>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Tested-by: default avatarPeter Gonda <pgonda@google.com>
Link: https://lore.kernel.org/r/20250106124633.1418972-14-nikunj@amd.com
parent 73bbf3b0

arch/x86/boot/compressed/sev.c

+2 −1
Original line number Diff line number Diff line
@@ -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)

{