linux-kernel - [PATCH] x86: enable PAT support on AMD Duron model 7

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Date:	Thu, 08 May 2008 04:04:05 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Adrian Bunk <bunk@...nel.org>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org, Pavel Machek <pavel@...e.cz>
Subject: [PATCH] x86: enable PAT support on AMD Duron model 7

On 08-05-08 03:57, Rene Herman wrote:

> Okay, so how's this? Seem to work well for me and makes me happy. Only
> tested on UP.

With this on top, I'm ecstatic:

  x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106


x86: enable PAT support on AMD Duron model 7

PAT support seems to work well on AMD Duron model 7. Enable it.

Signed-off-by: Rene Herman <rene.herman@...il.com>
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 7bec5e0..39b308b 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -312,6 +312,8 @@ static void __cpuinit early_get_cap(struct cpuinfo_x86 *c)
 	case X86_VENDOR_AMD:
 		if (c->x86 >= 0xf && c->x86 <= 0x11)
 			set_cpu_cap(c, X86_FEATURE_PAT_GOOD);
+		if (c->x86 == 6 && c->x86_model == 7)
+			set_cpu_cap(c, X86_FEATURE_PAT_GOOD);
 		break;
 	case X86_VENDOR_INTEL:
 		if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
@@ -411,6 +413,8 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
 	case X86_VENDOR_AMD:
 		if (c->x86 >= 0xf && c->x86 <= 0x11)
 			set_cpu_cap(c, X86_FEATURE_PAT_GOOD);
+		if (c->x86 == 6 && c->x86_model == 7)
+			set_cpu_cap(c, X86_FEATURE_PAT_GOOD);
 		break;
 	case X86_VENDOR_INTEL:
 		if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15))
--
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