linux-kernel - [PATCH 9/15 -tip] x86: Add cpufeature for Hardware configuration

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Date:	Mon, 11 May 2009 22:21:21 +0530
From:	Jaswinder Singh Rajput <jaswinder@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"H. Peter Anvin" <hpa@...nel.org>,
	Robert Richter <robert.richter@....com>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 9/15 -tip] x86: Add cpufeature for Hardware configuration


X86_FEATURE_HW_CFG : MSRC001_0015 Hardware Configuration Register (HWCR)

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
---
 arch/x86/include/asm/cpufeature.h |    1 +
 arch/x86/kernel/cpu/amd.c         |    4 ++++
 2 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 6eb9134..13050e9 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -163,6 +163,7 @@
 #define X86_FEATURE_FSB_FREQ 	(7*32+ 8) /* Scaleable bus speed	*/
 #define X86_FEATURE_MISC 	(7*32+ 9) /* Miscellaneous features	*/
 #define X86_FEATURE_PLATFORM 	(7*32+ 10) /* Platform feature		*/
+#define X86_FEATURE_HW_CFG 	(7*32+ 11) /* Hardware configuration	*/
 
 /* Virtualization flags: Linux defined */
 #define X86_FEATURE_TPR_SHADOW  (8*32+ 0) /* Intel TPR Shadow */
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index e2fe8e2..b2bccd2 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -478,6 +478,10 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 #endif
 
 	/* Set cpufeatures for miscellaneous MSRs			*/
+	if (c->x86 >= 7) {				/* K7+		*/
+		/* MSRC001_0015 Hardware Configuration Register (HWCR)	*/
+		set_cpu_cap(c, X86_FEATURE_HW_CFG);
+	}
 	if (c->x86 >= 0x10) {				/* fam10h+	*/
 		/* MSRC001_1022 Data Cache Configuration (DC_CFG)	*/
 		set_cpu_cap(c, X86_FEATURE_CACHE_CTL);
-- 
1.6.0.6



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