On Wed, Dec 01 2021 at 10:46, zhenwei pi wrote: > If the host side supports APERF&MPERF feature, the guest side may get > mismatched frequency. > > KVM uses x86_get_cpufreq_khz() to get the same frequency for guest side. > > Signed-off-by: zhenwei pi <pizhenwei@xxxxxxxxxxxxx> > --- > arch/x86/kvm/x86.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 5a403d92833f..125ed3c8b21a 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -8305,10 +8305,8 @@ static void tsc_khz_changed(void *data) > > if (data) > khz = freq->new; > - else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) > - khz = cpufreq_quick_get(raw_smp_processor_id()); > if (!khz) > - khz = tsc_khz; > + khz = x86_get_cpufreq_khz(raw_smp_processor_id()); my brain compiler tells me that this is broken.
