linux-kernel - Re: [PATCH] intel-pstate: Use #defines instead of hard-coded values.

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Date:	Tue, 26 Mar 2013 14:37:51 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	rafael.j.wysocki@...el.com, dirk.j.brandewie@...el.com
Subject: Re: [PATCH] intel-pstate: Use #defines instead of hard-coded values.

On Wednesday, March 20, 2013 10:21:10 AM Konrad Rzeszutek Wilk wrote:
> They are defined in coreboot (MSR_PLATFORM) and the other
> one is already defined in msr-index.h.
> 
> Lets use those.
> 
> CC: rafael.j.wysocki@...el.com
> CC: dirk.j.brandewie@...el.com
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>

Applied.

Thanks,
Rafael


> ---
>  arch/x86/include/uapi/asm/msr-index.h | 1 +
>  drivers/cpufreq/intel_pstate.c        | 6 +++---
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/uapi/asm/msr-index.h
> index 892ce40..7a060f4 100644
> --- a/arch/x86/include/uapi/asm/msr-index.h
> +++ b/arch/x86/include/uapi/asm/msr-index.h
> @@ -44,6 +44,7 @@
>  #define SNB_C1_AUTO_UNDEMOTE		(1UL << 27)
>  #define SNB_C3_AUTO_UNDEMOTE		(1UL << 28)
>  
> +#define MSR_PLATFORM_INFO		0x000000ce
>  #define MSR_MTRRcap			0x000000fe
>  #define MSR_IA32_BBL_CR_CTL		0x00000119
>  #define MSR_IA32_BBL_CR_CTL3		0x0000011e
> diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
> index f6dd1e7..dadc27d 100644
> --- a/drivers/cpufreq/intel_pstate.c
> +++ b/drivers/cpufreq/intel_pstate.c
> @@ -358,14 +358,14 @@ static void intel_pstate_sysfs_expose_params(void)
>  static int intel_pstate_min_pstate(void)
>  {
>  	u64 value;
> -	rdmsrl(0xCE, value);
> +	rdmsrl(MSR_PLATFORM_INFO, value);
>  	return (value >> 40) & 0xFF;
>  }
>  
>  static int intel_pstate_max_pstate(void)
>  {
>  	u64 value;
> -	rdmsrl(0xCE, value);
> +	rdmsrl(MSR_PLATFORM_INFO, value);
>  	return (value >> 8) & 0xFF;
>  }
>  
> @@ -373,7 +373,7 @@ static int intel_pstate_turbo_pstate(void)
>  {
>  	u64 value;
>  	int nont, ret;
> -	rdmsrl(0x1AD, value);
> +	rdmsrl(MSR_NHM_TURBO_RATIO_LIMIT, value);
>  	nont = intel_pstate_max_pstate();
>  	ret = ((value) & 255);
>  	if (ret <= nont)
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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