linux-kernel - Re: [PATCH] x86: process fam 10h like k8 with fixed mtrr setting

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Date:	Tue, 20 May 2008 14:54:44 +0200
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>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: process fam 10h like k8 with fixed mtrr setting

On Mon 2008-05-05 15:57:38, Yinghai Lu wrote:
> 
> otherwise fixed MTRR for family 10h may not be changed
> 
> Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
> 
> Index: linux-2.6/arch/x86/kernel/cpu/mtrr/generic.c
> ===================================================================
> --- linux-2.6.orig/arch/x86/kernel/cpu/mtrr/generic.c
> +++ linux-2.6/arch/x86/kernel/cpu/mtrr/generic.c
> @@ -342,7 +342,7 @@ static void set_fixed_range(int msr, boo
>  
>  	if (lo != msrwords[0] || hi != msrwords[1]) {
>  		if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
> -		    boot_cpu_data.x86 == 15 &&
> +		    (boot_cpu_data.x86 >= 0x0f && boot_cpu_data.x86 <= 0x11) &&
>  		    ((msrwords[0] | msrwords[1]) & K8_MTRR_RDMEM_WRMEM_MASK))
>  			k8_enable_fixed_iorrs();
>  		mtrr_wrmsr(msr, msrwords[0], msrwords[1]);

This also changes family 0x11. Is that ok?

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