Messages in this thread Patch in this message | | | From | Hayato Ohhashi <> | Subject | [PATCH] x86/xen/time: set the X86_FEATURE_TSC_KNOWN_FREQ flag in xen_tsc_khz() | Date | Tue, 21 Jul 2020 16:12:31 +0000 |
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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@vmm.dev> --- 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 c8897aad13cd..91f5b330dcc6 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); } -- 2.23.3
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