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From:   Nikunj A Dadhania <nikunj@amd.com>
To:     <linux-kernel@vger.kernel.org>, <x86@kernel.org>
CC:     <bp@alien8.de>, <thomas.lendacky@amd.com>,
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        <pbonzini@redhat.com>, <nikunj@amd.com>, <michael.roth@amd.com>,
        <ketanch@iitk.ac.in>
Subject: [PATCH v2 09/11] x86/kvmclock: Use Secure TSC as clock if available
Date:   Sun, 26 Mar 2023 20:16:59 +0530
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For AMD SNP guests having Secure TSC enabled, use Secure TSC based
clocksource instead of kvmclock.

Signed-off-by: Nikunj A Dadhania <nikunj@amd.com>
---
 arch/x86/kernel/kvmclock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index 0f35d44c56fe..1be342064851 100644
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -288,7 +288,7 @@ void __init kvmclock_init(void)
 {
 	u8 flags;
 
-	if (!kvm_para_available() || !kvmclock)
+	if (!kvm_para_available() || !kvmclock || cc_platform_has(CC_ATTR_GUEST_SECURE_TSC))
 		return;
 
 	if (kvm_para_has_feature(KVM_FEATURE_CLOCKSOURCE2)) {
-- 
2.34.1