linux-kernel - [PATCH 11/15 -tip] x86: Add cpufeature for System management mode (SMM)

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Message-Id: <1242060771.5139.21.camel@ht.satnam>
Date:	Mon, 11 May 2009 22:22:51 +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 11/15 -tip] x86: Add cpufeature for System management mode
 (SMM)


X86_FEATURE_SMM : SMM MSRs C001_0111-C001_0113 & C001_0050-C000_0056

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
---
 arch/x86/include/asm/cpufeature.h |    1 +
 arch/x86/kernel/cpu/amd.c         |    2 ++
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 674493f..e108284 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -165,6 +165,7 @@
 #define X86_FEATURE_PLATFORM 	(7*32+ 10) /* Platform feature		*/
 #define X86_FEATURE_HW_CFG 	(7*32+ 11) /* Hardware configuration	*/
 #define X86_FEATURE_SYS_CFG 	(7*32+ 12) /* System configuration	*/
+#define X86_FEATURE_SMM 	(7*32+ 13) /* System Management	Mode	*/
 
 /* 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 8a8db1a..88cac44 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -489,6 +489,8 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 		 * MSRC001_001F Northbridge Configuration Register (NB_CFG)
 		 */
 		set_cpu_cap(c, X86_FEATURE_SYS_CFG);
+		/* SMM MSRs C001_0111-C001_0113 & C001_0050-C000_0056	*/
+		set_cpu_cap(c, X86_FEATURE_SMM);
 	}
 	if (c->x86 >= 0x10) {				/* fam10h+	*/
 		/* MSRC001_1022 Data Cache Configuration (DC_CFG)	*/
-- 
1.6.0.6



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