From: Andi Kleen <andi@firstfloor.org>
To: mingo@elte.hu, venkatesh.pallipadi@intel.com, tglx@linutronix.de,
linux-kernel@vger.kernel.org
Subject: [PATCH] Enable PAT for more AMD CPUs
Date: Thu, 17 Jan 2008 13:36:13 +0100 [thread overview]
Message-ID: <20080117123613.GA22563@basil.nowhere.org> (raw)
I checked some K7 errata files and couldn't find anything related
to PAT. Also for Fam10h and 11h it should be definitely enabled.
Enable PAT for all AMD CPUs >= 6, which is K7 and newer.
Signed-off-by: Andi Kleen <ak@suse.de>
Index: linux/arch/x86/mm/pat.c
===================================================================
--- linux.orig/arch/x86/mm/pat.c
+++ linux/arch/x86/mm/pat.c
@@ -49,7 +49,7 @@ static int pat_known_cpu(void)
return cpu_has_pat;
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
- (boot_cpu_data.x86 == 0xF))
+ (boot_cpu_data.x86 >= 6))
return cpu_has_pat;
return 0;
next reply other threads:[~2008-01-17 12:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-17 12:36 Andi Kleen [this message]
2008-01-17 12:43 ` [PATCH] Enable PAT for more AMD CPUs Ingo Molnar
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