Messages in this thread | | | From | "Rafael J. Wysocki" <> | Date | Wed, 22 Jun 2022 15:39:49 +0200 | Subject | Re: [PATCH] cpufreq: Add Zhaoxin turbo boost control interface support |
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On Wed, Jun 22, 2022 at 5:44 AM Tony W Wang-oc <TonyWWang-oc@zhaoxin.com> wrote: > > Recent Zhaoxin CPUs support X86_FEATURE_IDA and the turbo boost can > be dynamically enabled or disabled through MSR 0x1a0[38] in the same > way as Intel. So add turbo boost control support for Zhaoxin too.
And for Centaur too according to the code changes below.
> > Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com> > --- > drivers/cpufreq/acpi-cpufreq.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c > index 3d514b8..1bb2b90 100644 > --- a/drivers/cpufreq/acpi-cpufreq.c > +++ b/drivers/cpufreq/acpi-cpufreq.c > @@ -78,6 +78,8 @@ static bool boost_state(unsigned int cpu) > > switch (boot_cpu_data.x86_vendor) { > case X86_VENDOR_INTEL: > + case X86_VENDOR_CENTAUR: > + case X86_VENDOR_ZHAOXIN: > rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi); > msr = lo | ((u64)hi << 32); > return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE); > @@ -97,6 +99,8 @@ static int boost_set_msr(bool enable) > > switch (boot_cpu_data.x86_vendor) { > case X86_VENDOR_INTEL: > + case X86_VENDOR_CENTAUR: > + case X86_VENDOR_ZHAOXIN: > msr_addr = MSR_IA32_MISC_ENABLE; > msr_mask = MSR_IA32_MISC_ENABLE_TURBO_DISABLE; > break; > -- > 2.7.4
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