linux-kernel - Re: [PATCH v6 1/6] cpufreq: acpi: move MSR_K7_HWCR_CPB_DIS

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Date: Mon, 18 Mar 2024 13:43:27 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Perry Yuan <perry.yuan@....com>
Cc: rafael.j.wysocki@...el.com, Mario.Limonciello@....com, 
	viresh.kumar@...aro.org, Ray.Huang@....com, gautham.shenoy@....com, 
	Borislav.Petkov@....com, Alexander.Deucher@....com, Xinmei.Huang@....com, 
	oleksandr@...alenko.name, Xiaojian.Du@....com, Li.Meng@....com, 
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 1/6] cpufreq: acpi: move MSR_K7_HWCR_CPB_DIS_BIT into msr-index.h

On Mon, Mar 18, 2024 at 11:12 AM Perry Yuan <perry.yuan@....com> wrote:
>
> There are some other drivers also need to use the
> MSR_K7_HWCR_CPB_DIS_BIT for CPB control bit, so it makes sense to move
> the definition to a common header file to allow other driver to use it.
>
> No intentional functional impact.
>
> Suggested-by: Gautham Ranjal Shenoy <gautham.shenoy@....com>
> Signed-off-by: Perry Yuan <perry.yuan@....com>

This change is fine with me, so

Acked-by: Rafael J. Wysocki <rafael@...nel.org>

> ---
>  arch/x86/include/asm/msr-index.h | 2 ++
>  drivers/cpufreq/acpi-cpufreq.c   | 2 --
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
> index 05956bd8bacf..41503647192e 100644
> --- a/arch/x86/include/asm/msr-index.h
> +++ b/arch/x86/include/asm/msr-index.h
> @@ -775,6 +775,8 @@
>  #define MSR_K7_HWCR_IRPERF_EN          BIT_ULL(MSR_K7_HWCR_IRPERF_EN_BIT)
>  #define MSR_K7_FID_VID_CTL             0xc0010041
>  #define MSR_K7_FID_VID_STATUS          0xc0010042
> +#define MSR_K7_HWCR_CPB_DIS_BIT                25
> +#define MSR_K7_HWCR_CPB_DIS            BIT_ULL(MSR_K7_HWCR_CPB_DIS_BIT)
>
>  /* K6 MSRs */
>  #define MSR_K6_WHCR                    0xc0000082
> diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
> index 37f1cdf46d29..2fc82831bddd 100644
> --- a/drivers/cpufreq/acpi-cpufreq.c
> +++ b/drivers/cpufreq/acpi-cpufreq.c
> @@ -50,8 +50,6 @@ enum {
>  #define AMD_MSR_RANGE          (0x7)
>  #define HYGON_MSR_RANGE                (0x7)
>
> -#define MSR_K7_HWCR_CPB_DIS    (1ULL << 25)
> -
>  struct acpi_cpufreq_data {
>         unsigned int resume;
>         unsigned int cpu_feature;
> --
> 2.34.1
>
>