Messages in this thread | | | Date | Mon, 7 Nov 2022 18:01:44 +0800 | From | Fei Li <> | Subject | Re: [PATCH v2] x86/acrn: Set X86_FEATURE_TSC_KNOWN_FREQ |
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On 2022-11-01 at 13:30:19 +0800, Fei Li wrote: > If the TSC frequency is known from the acrn_get_tsc_khz(), > the TSC frequency does not need to be recalibrated. > > Avoiding recalibration by setting X86_FEATURE_TSC_KNOWN_FREQ. > This patch also removes `inline` for acrn_get_tsc_khz() since > it doesn't make sense. > > Signed-off-by: Fei Li <fei1.li@intel.com> > Reviewed-by: Yin, Fengwei <fengwei.yin@intel.com> > > --- > v2: > - Detail the commit message
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> --- > arch/x86/include/asm/acrn.h | 5 ----- > arch/x86/kernel/cpu/acrn.c | 6 ++++++ > 2 files changed, 6 insertions(+), 5 deletions(-) > > diff --git a/arch/x86/include/asm/acrn.h b/arch/x86/include/asm/acrn.h > index 1dd14381bcb6..aa12c74ea959 100644 > --- a/arch/x86/include/asm/acrn.h > +++ b/arch/x86/include/asm/acrn.h > @@ -30,11 +30,6 @@ static inline u32 acrn_cpuid_base(void) > return 0; > } > > -static inline unsigned long acrn_get_tsc_khz(void) > -{ > - return cpuid_eax(ACRN_CPUID_TIMING_INFO); > -} > - > /* > * Hypercalls for ACRN > * > diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c > index 485441b7f030..c5ff75b6a949 100644 > --- a/arch/x86/kernel/cpu/acrn.c > +++ b/arch/x86/kernel/cpu/acrn.c > @@ -24,6 +24,12 @@ static u32 __init acrn_detect(void) > return acrn_cpuid_base(); > } > > +static unsigned long acrn_get_tsc_khz(void) > +{ > + setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ); > + return cpuid_eax(ACRN_CPUID_TIMING_INFO); > +} > + > static void __init acrn_init_platform(void) > { > /* Setup the IDT for ACRN hypervisor callback */ > > base-commit: 5aaef24b5c6d4246b2cac1be949869fa36577737 > -- > 2.34.1 >
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