From: Nikunj A Dadhania <nikunj@amd.com>
To: <linux-kernel@vger.kernel.org>, <x86@kernel.org>
Cc: <bp@alien8.de>, <thomas.lendacky@amd.com>,
<dionnaglaze@google.com>, <pgonda@google.com>,
<seanjc@google.com>, <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 [thread overview]
Message-ID: <20230326144701.3039598-10-nikunj@amd.com> (raw)
In-Reply-To: <20230326144701.3039598-1-nikunj@amd.com>
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
next prev parent reply other threads:[~2023-03-26 14:49 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-26 14:46 [PATCH v2 00/11] Add Secure TSC support for SNP guests Nikunj A Dadhania
2023-03-26 14:46 ` [PATCH v2 01/11] virt: sev-guest: Use AES GCM crypto library Nikunj A Dadhania
2023-04-03 19:09 ` Tom Lendacky
2023-04-05 5:10 ` Nikunj A. Dadhania
2023-03-26 14:46 ` [PATCH v2 02/11] virt: sev-guest: Move mutex to SNP guest device structure Nikunj A Dadhania
2023-04-03 19:13 ` Tom Lendacky
2023-04-05 5:23 ` Nikunj A. Dadhania
2023-03-26 14:46 ` [PATCH v2 03/11] virt: sev-guest: Add snp_guest_req structure Nikunj A Dadhania
2023-04-03 19:59 ` Tom Lendacky
2023-04-05 5:31 ` Nikunj A. Dadhania
2023-03-26 14:46 ` [PATCH v2 04/11] virt: sev-guest: Add simplified helper to assign vmpck Nikunj A Dadhania
2023-04-03 20:26 ` Tom Lendacky
2023-04-05 6:18 ` Nikunj A. Dadhania
2023-04-10 16:31 ` Peter Gonda
2023-04-14 4:51 ` Nikunj A. Dadhania
2023-03-26 14:46 ` [PATCH v2 05/11] x86/sev: Move and reorganize sev guest request api Nikunj A Dadhania
2023-04-03 21:01 ` Tom Lendacky
2023-04-05 7:11 ` Nikunj A. Dadhania
2023-03-26 14:46 ` [PATCH v2 06/11] x86/mm: Add generic guest initialization hook Nikunj A Dadhania
2023-03-26 14:46 ` [PATCH v2 07/11] x86/sev: Change TSC MSR behavior for Secure TSC enabled guests Nikunj A Dadhania
2023-04-03 21:15 ` Tom Lendacky
2023-03-26 14:46 ` [PATCH v2 08/11] x86/sev: Add Secure TSC support for SNP guests Nikunj A Dadhania
2023-04-03 21:41 ` Tom Lendacky
2023-04-05 7:37 ` Nikunj A. Dadhania
2023-04-05 13:24 ` Tom Lendacky
2023-04-05 14:37 ` Nikunj A. Dadhania
2023-04-10 17:14 ` Peter Gonda
2023-04-14 5:10 ` Nikunj A. Dadhania
2023-03-26 14:46 ` Nikunj A Dadhania [this message]
2023-04-03 21:45 ` [PATCH v2 09/11] x86/kvmclock: Use Secure TSC as clock if available Tom Lendacky
2023-04-05 8:16 ` Nikunj A. Dadhania
2023-03-26 14:47 ` [PATCH v2 10/11] x86/tsc: Mark Secure TSC as reliable clocksource Nikunj A Dadhania
2023-03-26 14:47 ` [PATCH v2 11/11] x86/sev: Enable Secure TSC for SNP guests Nikunj A Dadhania
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