linux-kernel - Re: [PATCH v11 19/20] x86/kvmclock: Skip kvmclock when Secure TSC is available

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Message-ID: <a2733ac2-2a44-49da-18b4-ea905b439840@amd.com>
Date: Tue, 1 Oct 2024 20:06:29 +0530
From: "Nikunj A. Dadhania" <nikunj@....com>
To: Thomas Gleixner <tglx@...utronix.de>,
 Sean Christopherson <seanjc@...gle.com>
Cc: linux-kernel@...r.kernel.org, thomas.lendacky@....com, bp@...en8.de,
 x86@...nel.org, kvm@...r.kernel.org, mingo@...hat.com,
 dave.hansen@...ux.intel.com, pgonda@...gle.com, pbonzini@...hat.com,
 peterz@...radead.org, gautham.shenoy@....com
Subject: Re: [PATCH v11 19/20] x86/kvmclock: Skip kvmclock when Secure TSC is
 available

On 10/1/2024 9:56 AM, Nikunj A. Dadhania wrote:

> Also I realized that, for the guests, instead of rdtsc(), we should be 
> calling rdtsc_ordered() to make sure that time moves forward even when
> vCPUs are migrated.

The above is with reference to native_sched_clock() being used for VM
instead of kvm_sched_clock_read() when using TSC.

Regards
Nikunj