Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932369AbbGSS05 (ORCPT ); Sun, 19 Jul 2015 14:26:57 -0400 Received: from mail-wi0-f173.google.com ([209.85.212.173]:36258 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932166AbbGSS04 (ORCPT ); Sun, 19 Jul 2015 14:26:56 -0400 From: Mathias Krause To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" Cc: linux-kernel@vger.kernel.org, x86@kernel.org, Mathias Krause , Borislav Petkov Subject: [PATCH] x86, cpufeature: add feature bit for SDBG Date: Sun, 19 Jul 2015 20:26:43 +0200 Message-Id: <1437330403-12102-1-git-send-email-minipli@googlemail.com> X-Mailer: git-send-email 1.7.10.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1451 Lines: 35 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 Cc: Borislav Petkov Cc: H. Peter Anvin Cc: Ingo Molnar Cc: Thomas Gleixner --- 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 */ -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/