Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754188AbaJMNra (ORCPT ); Mon, 13 Oct 2014 09:47:30 -0400 Received: from mga02.intel.com ([134.134.136.20]:24137 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753860AbaJMNr2 (ORCPT ); Mon, 13 Oct 2014 09:47:28 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,710,1406617200"; d="scan'208";a="617730851" From: Alexander Shishkin To: Peter Zijlstra Cc: Ingo Molnar , linux-kernel@vger.kernel.org, Robert Richter , Frederic Weisbecker , Mike Galbraith , Paul Mackerras , Stephane Eranian , Andi Kleen , kan.liang@intel.com, adrian.hunter@intel.com, acme@infradead.org, Alexander Shishkin Subject: [PATCH v5 10/20] x86: Add Intel Processor Trace (INTEL_PT) cpu feature detection Date: Mon, 13 Oct 2014 16:45:38 +0300 Message-Id: <1413207948-28202-11-git-send-email-alexander.shishkin@linux.intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1413207948-28202-1-git-send-email-alexander.shishkin@linux.intel.com> References: <1413207948-28202-1-git-send-email-alexander.shishkin@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Intel Processor Trace is an architecture extension that allows for program flow tracing. Signed-off-by: Alexander Shishkin --- arch/x86/include/asm/cpufeature.h | 1 + arch/x86/kernel/cpu/scattered.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index bb9b258d60..db2debe5bb 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h @@ -185,6 +185,7 @@ #define X86_FEATURE_DTHERM ( 7*32+ 7) /* Digital Thermal Sensor */ #define X86_FEATURE_HW_PSTATE ( 7*32+ 8) /* AMD HW-PState */ #define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */ +#define X86_FEATURE_INTEL_PT ( 7*32+10) /* Intel Processor Trace */ /* Virtualization flags: Linux defined, word 8 */ #define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */ diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c index 4a8013d559..42f5fa953f 100644 --- a/arch/x86/kernel/cpu/scattered.c +++ b/arch/x86/kernel/cpu/scattered.c @@ -36,6 +36,7 @@ void init_scattered_cpuid_features(struct cpuinfo_x86 *c) { X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006, 0 }, { X86_FEATURE_PLN, CR_EAX, 4, 0x00000006, 0 }, { X86_FEATURE_PTS, CR_EAX, 6, 0x00000006, 0 }, + { X86_FEATURE_INTEL_PT, CR_EBX,25, 0x00000007, 0 }, { X86_FEATURE_APERFMPERF, CR_ECX, 0, 0x00000006, 0 }, { X86_FEATURE_EPB, CR_ECX, 3, 0x00000006, 0 }, { X86_FEATURE_HW_PSTATE, CR_EDX, 7, 0x80000007, 0 }, -- 2.1.0 -- 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/