linux-kernel - [PATCH 22/27] x86: debugctlmsr constants

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Date:	Sun, 25 Nov 2007 14:06:24 -0800 (PST)
From:	Roland McGrath <roland@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH 22/27] x86: debugctlmsr constants


This adds constant macros for a few of the bits in MSR_IA32_DEBUGCTLMSR.

Signed-off-by: Roland McGrath <roland@...hat.com>
---
 include/asm-x86/msr-index.h |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/include/asm-x86/msr-index.h b/include/asm-x86/msr-index.h
index a494473..4045bbe 100644
--- a/include/asm-x86/msr-index.h
+++ b/include/asm-x86/msr-index.h
@@ -63,6 +63,13 @@
 #define MSR_IA32_LASTINTFROMIP		0x000001dd
 #define MSR_IA32_LASTINTTOIP		0x000001de
 
+/* DEBUGCTLMSR bits (others vary by model): */
+#define _DEBUGCTLMSR_LBR	0 /* last branch recording */
+#define _DEBUGCTLMSR_BTF	1 /* single-step on branches */
+
+#define DEBUGCTLMSR_LBR		(1UL << _DEBUGCTLMSR_LBR)
+#define DEBUGCTLMSR_BTF		(1UL << _DEBUGCTLMSR_BTF)
+
 #define MSR_IA32_MC0_CTL		0x00000400
 #define MSR_IA32_MC0_STATUS		0x00000401
 #define MSR_IA32_MC0_ADDR		0x00000402
-
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