The following commit has been merged into the x86/timers branch of tip: Commit-ID: 898ec52d2ba05915aaedcdb21bff2e944c883cb8 Gitweb: https://git.kernel.org/tip/898ec52d2ba05915aaedcdb21bff2e944c883cb8 Author: Hayato Ohhashi <o8@xxxxxxx> AuthorDate: Tue, 21 Jul 2020 16:12:31 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Sat, 25 Jul 2020 15:49:41 +02:00 x86/xen/time: Set the X86_FEATURE_TSC_KNOWN_FREQ flag in xen_tsc_khz() If the TSC frequency is known from the pvclock page, the TSC frequency does not need to be recalibrated. We can avoid recalibration by setting X86_FEATURE_TSC_KNOWN_FREQ. Signed-off-by: Hayato Ohhashi <o8@xxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> Link: https://lore.kernel.org/r/20200721161231.6019-1-o8@xxxxxxx --- arch/x86/xen/time.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c index c8897aa..91f5b33 100644 --- a/arch/x86/xen/time.c +++ b/arch/x86/xen/time.c @@ -39,6 +39,7 @@ static unsigned long xen_tsc_khz(void) struct pvclock_vcpu_time_info *info = &HYPERVISOR_shared_info->vcpu_info[0].time; + setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ); return pvclock_tsc_khz(info); }
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