Re: [PATCH v6 13/51] x86/acrn: Mark TSC frequency as known when using ACRN for calibration

[Sean Christopherson <seanjc@xxxxxxxxxx>]

On Sat, Aug 08, 2026, David Woodhouse wrote:
> On Thu, 2026-08-06 at 16:35 -0700, Sean Christopherson wrote:
> > Mark the TSC frequency as known when using ACRN's PV CPUID information.
> > Per commit 81a71f51b89e ("x86/acrn: Set up timekeeping") and common sense,
> > the TSC freq is explicitly provided by the hypervisor.
> >
> > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
> 
> Huh... does this literally get reverted completely in the very *next*
> patch in the series? Kind of weird, but I guess in some ways it makes
> sense...

The literal code gets reverted, but the functional change does not.  Before this
change, ACRN is the only guest-side PV code that doesn't set 
X86_FEATURE_TSC_KNOWN_FREQ
when the hypervisor provides the exact frequency.  I.e. this patch allows for
making the "No functional change intended" claim in the next patch.