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A single commit which sets the X86_FEATURE_TSC_KNOWN_FREQ flag for Xen guests, 

to avoid recalibration.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-timers-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 timer update from Ingo Molnar:
 "Set the X86_FEATURE_TSC_KNOWN_FREQ flag for Xen guests, to avoid
  recalibration"

* tag 'x86-timers-2020-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/xen/time: Set the X86_FEATURE_TSC_KNOWN_FREQ flag in xen_tsc_khz()
This commit is contained in:
Linus Torvalds 2020-08-03 17:41:06 -07:00
parent 5183a617ec 898ec52d2b
commit a92ad11fb2
1 changed files with 1 additions and 0 deletions
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1
arch/x86/xen/time.c
View File

@ -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);
}