linux-kernel - [tip: x86/sev] x86/sev: Add the Secure TSC feature for SNP guests

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Message-ID: <173641582369.399.9163326077028868911.tip-bot2@tip-bot2>
Date: Thu, 09 Jan 2025 09:43:43 -0000
From: "tip-bot2 for Nikunj A Dadhania" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Nikunj A Dadhania <nikunj@....com>, "Borislav Petkov (AMD)" <bp@...en8.de>,
 Tom Lendacky <thomas.lendacky@....com>, Peter Gonda <pgonda@...gle.com>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/sev] x86/sev: Add the Secure TSC feature for SNP guests

The following commit has been merged into the x86/sev branch of tip:

Commit-ID:     0563ee35ae2c9cfb0c6a7b2c0ddf7d9372bb8a98
Gitweb:        https://git.kernel.org/tip/0563ee35ae2c9cfb0c6a7b2c0ddf7d9372bb8a98
Author:        Nikunj A Dadhania <nikunj@....com>
AuthorDate:    Mon, 06 Jan 2025 18:16:33 +05:30
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Thu, 09 Jan 2025 10:21:56 +01:00

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: Nikunj A Dadhania <nikunj@....com>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@....com>
Tested-by: Peter Gonda <pgonda@...gle.com>
Link: https://lore.kernel.org/r/20250106124633.1418972-14-nikunj@amd.com
---
 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 cd44e12..bb55934 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -401,7 +401,8 @@ finish:
  * 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)
 {