linux-kernel - [PATCH] x86, AMD: Extend support to future families

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Message-ID: <20100602182921.GA21557@aftab>
Date:	Wed, 2 Jun 2010 20:29:21 +0200
From:	Borislav Petkov <borislav.petkov@....com>
To:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
CC:	LKML <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: [PATCH] x86, AMD: Extend support to future families

Extend support to future families, and in particular:

* extend direct mapping split of Tseg SMM area.
* extend K8 flavored alternatives (NOPS).
* rep movs* prefix is fast in ucode.

Signed-off-by: Borislav Petkov <borislav.petkov@....com>
---
 arch/x86/kernel/cpu/amd.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index e485825..12b9cff 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -466,7 +466,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 		}
 
 	}
-	if (c->x86 == 0x10 || c->x86 == 0x11)
+	if (c->x86 >= 0x10)
 		set_cpu_cap(c, X86_FEATURE_REP_GOOD);
 
 	/* get apicid instead of initial apic id from cpuid */
@@ -529,7 +529,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 			num_cache_leaves = 3;
 	}
 
-	if (c->x86 >= 0xf && c->x86 <= 0x11)
+	if (c->x86 >= 0xf)
 		set_cpu_cap(c, X86_FEATURE_K8);
 
 	if (cpu_has_xmm2) {
@@ -546,7 +546,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 		fam10h_check_enable_mmcfg();
 	}
 
-	if (c == &boot_cpu_data && c->x86 >= 0xf && c->x86 <= 0x11) {
+	if (c == &boot_cpu_data && c->x86 >= 0xf) {
 		unsigned long long tseg;
 
 		/*
-- 
1.6.4.4


-- 
Regards/Gruss,
Boris.

Operating Systems Research Center
Advanced Micro Devices, Inc.

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