linux-kernel - Re: [PATCH] x86: pat cpu feature bit setting for known cpus

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Date:	Fri, 28 Mar 2008 14:41:02 +0100
From:	Pavel Machek <pavel@....cz>
To:	yhlu.kernel@...il.com
Cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: pat cpu feature bit setting for known cpus


On Mon 2008-03-24 23:24:34, Yinghai Lu wrote:
> [PATCH] x86: pat cpu feature bit setting for known cpus
> 
> Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
> 
> diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
> index eb94460..b186047 100644
> --- a/arch/x86/kernel/cpu/common.c
> +++ b/arch/x86/kernel/cpu/common.c
> @@ -309,6 +309,19 @@ static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
>  
>  	}
>  
> +	clear_cpu_cap(c, X86_FEATURE_PAT);
> +
> +	switch (c->x86_vendor) {
> +	case X86_VENDOR_AMD:
> +		if (c->x86 >= 0xf && c->x86 <= 0x11)
> +			set_cpu_cap(c, X86_FEATURE_PAT);
> +		break;
> +	case X86_VENDOR_INTEL:
> +		if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
> +			set_cpu_cap(c, X86_FEATURE_PAT);
> +		break;
> +	}
> +
>  }
>  
>  /*
> @@ -397,6 +410,18 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
>  		init_scattered_cpuid_features(c);
>  	}
>  
> +	clear_cpu_cap(c, X86_FEATURE_PAT);
> +
> +	switch (c->x86_vendor) {
> +	case X86_VENDOR_AMD:
> +		if (c->x86 >= 0xf && c->x86 <= 0x11)
> +			set_cpu_cap(c, X86_FEATURE_PAT);
> +		break;
> +	case X86_VENDOR_INTEL:
> +		if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
> +			set_cpu_cap(c, X86_FEATURE_PAT);
> +		break;
> +	}
>  }
>  

Cut&paste programming? Can you make it a function?

> diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
> index 3f1dc97..ddaaaaa 100644
> --- a/arch/x86/kernel/setup_64.c
> +++ b/arch/x86/kernel/setup_64.c
> @@ -979,12 +979,19 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
>  	if (c->extended_cpuid_level >= 0x80000007)
>  		c->x86_power = cpuid_edx(0x80000007);
>  
> +
> +	clear_cpu_cap(c, X86_FEATURE_PAT);



>  	switch (c->x86_vendor) {
>  	case X86_VENDOR_AMD:
>  		early_init_amd(c);
> +		if (c->x86 >= 0xf && c->x86 <= 0x11)
> +			set_cpu_cap(c, X86_FEATURE_PAT);
>  		break;
>  	case X86_VENDOR_INTEL:
>  		early_init_intel(c);
> +		if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
> +			set_cpu_cap(c, X86_FEATURE_PAT);
>  		break;
>  	}

one more copy...
							Pavel
-- 
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