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

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Message-ID: <86802c440805201024g27c99de3m721dd157242dad70@mail.gmail.com>
Date:	Tue, 20 May 2008 10:24:36 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Pavel Machek" <pavel@....cz>
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 Tue, May 20, 2008 at 5:54 AM, Pavel Machek <pavel@....cz> wrote:
> 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?

Yes.

YH
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