From b1c599b8ff80ea79b9f8277a3f9f36a7b0cfedce Mon Sep 17 00:00:00 2001 From: Mathias Krause Date: Fri, 24 Jul 2015 09:15:11 +0200 Subject: [PATCH] x86/cpufeature: Add feature bit for Intel's Silicon Debug CPUID bit Add a CPUID feature bit for the SDBG (Silicon Debug) CPU feature found on recent Intel systems starting with Haswell. Using the IA32_DEBUG_INTERFACE MSR (index C80H) one can at least detect if SDBG has been enabled by the firmware and if it has been used or not. Signed-off-by: Mathias Krause Signed-off-by: Borislav Petkov Cc: Aaron Lu Cc: Dave Hansen Cc: Dirk Brandewie Cc: H. Peter Anvin Cc: Josh Triplett Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Ross Zwisler Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1437330403-12102-1-git-send-email-minipli@googlemail.com Signed-off-by: Ingo Molnar --- arch/x86/include/asm/cpufeature.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index 3d6606fb97d0..4b11974b4ea7 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h @@ -119,6 +119,7 @@ #define X86_FEATURE_TM2 ( 4*32+ 8) /* Thermal Monitor 2 */ #define X86_FEATURE_SSSE3 ( 4*32+ 9) /* Supplemental SSE-3 */ #define X86_FEATURE_CID ( 4*32+10) /* Context ID */ +#define X86_FEATURE_SDBG ( 4*32+11) /* Silicon Debug */ #define X86_FEATURE_FMA ( 4*32+12) /* Fused multiply-add */ #define X86_FEATURE_CX16 ( 4*32+13) /* CMPXCHG16B */ #define X86_FEATURE_XTPR ( 4*32+14) /* Send Task Priority Messages */ -- 2.20.1