1 files changed, 7 insertions, 0 deletions

diff --git a/include/asm-x86/msr-index.h b/include/asm-x86/msr-index.h
index a4944732be04..4045bbe47379 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