On 27.02.2025 07:53, Penny, Zheng wrote:
>> -Original Message-
>> From: Jan Beulich
>> Sent: Wednesday, February 12, 2025 12:46 AM
>>
>> On 06.02.2025 09:32, Penny Zheng wrote:
>>> --- a/xen/arch/x86/acpi/cpufreq/amd-cppc.c
>>> +++ b/xen/arch/x86/acpi/cpufreq/amd-cppc.c
>>> +}
>>> +
>>> +s
Pau Monné ; xen-devel@lists.xenproject.org
> Subject: Re: [PATCH v2 05/11] xen/x86: introduce a new amd cppc driver for
> cpufreq scaling
>
> On 06.02.2025 09:32, Penny Zheng wrote:
> > --- a/xen/arch/x86/acpi/cpufreq/amd-cppc.c
> > +++ b/xen/arch/x86/acpi/cpufreq/amd
On 18.02.2025 08:40, Penny, Zheng wrote:
>> -Original Message-
>> From: Jan Beulich
>> Sent: Wednesday, February 12, 2025 12:46 AM
>> To: Penny, Zheng
>>
>> On 06.02.2025 09:32, Penny Zheng wrote:
>>> +static int amd_cppc_khz_to_perf(const struct amd_cppc_drv_data *data,
>>> +unsigned int
ect.org
> Subject: Re: [PATCH v2 05/11] xen/x86: introduce a new amd cppc driver for
> cpufreq scaling
>
> On 06.02.2025 09:32, Penny Zheng wrote:
> > --- a/xen/arch/x86/acpi/cpufreq/amd-cppc.c
> > +++ b/xen/arch/x86/acpi/cpufreq/amd-cppc.c
> >
> > +/*
> >
On 06.02.2025 09:32, Penny Zheng wrote:
> --- a/xen/arch/x86/acpi/cpufreq/amd-cppc.c
> +++ b/xen/arch/x86/acpi/cpufreq/amd-cppc.c
> @@ -13,7 +13,61 @@
>
> #include
> #include
> +#include
> +#include
> #include
> +#include
> +
> +#define MSR_AMD_CPPC_CAP1 0xc00102b0
> +#defi
amd-cppc is the AMD CPU performance scaling driver that introduces a
new CPU frequency control mechanism firstly on AMD Zen based CPU series.
The new mechanism is based on Collaborative Processor Performance
Control (CPPC) which is a finer grain frequency management
than legacy ACPI hardware P-Stat
