Re: [PATCH v6 14/51] x86/tsc: Consolidate forcing of X86_FEATURE_TSC_KNOWN_FREQ for PV code
David Woodhouse <[email protected]>
| Newsgroups | org.xenproject.lists.xen-devel,dev.linux.lists.linux-coco,dev.linux.lists.virtualization,org.kernel.vger.kvm,org.kernel.vger.linux-hyperv,org.kernel.vger.linux-kernel |
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| Message-ID | <[email protected]> |
On Thu, 2026-08-06 at 16:35 -0700, Sean Christopherson wrote:
> Now that all paravirt code that explicitly specifies the TSC frequency
> also sets X86_FEATURE_TSC_KNOWN_FREQ, replace all of the one-off code
> and simply set X86_FEATURE_TSC_KNOWN_FREQ if the TSC frequency is known.
>
> Do NOT force set TSC_KNOWN_FREQ if the "known" TSC frequency was provided
> by the user. Per commit bd35c77e32e4 ("x86/tsc: Add tsc_early_khz command
> line parameter"), one of the goals of the param is to allow the refined
> calibration work "to do meaningful error checking".
>
> No functional change intended.
>
> Reviewed-by: Michael Kelley <[email protected]>
> Signed-off-by: Sean Christopherson <[email protected]>
Reviewed-by: David Woodhouse <[email protected]>
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