From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 059D4C433EF for ; Mon, 24 Jan 2022 08:06:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242012AbiAXIG6 (ORCPT ); Mon, 24 Jan 2022 03:06:58 -0500 Received: from mga06.intel.com ([134.134.136.31]:57796 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233770AbiAXIG4 (ORCPT ); Mon, 24 Jan 2022 03:06:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643011616; x=1674547616; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=NdWJpfgYvdi4FpcIp+TSu8AsTwOqqArWaWI2Neenkoc=; b=lac+LAYWaDIULtiJvBcyPNrKwZkap/nwQ0OH9Nj1HbPf0d5Nm8y+okWw HWGwsZQ7X1HOcqNr4KIHlMCWtGpxjXVbkpocc1L41nzgM+g8O+707Uupb cT2kk9GktGXxSYnpZQaT/GLovG7jNrQ47wwugLZ0TitKXKRIke6qGRoCg yDKefQFf+7omBeNI2MJ9WRteVpp0PW/XFCqchIUi9C4eO1xIy0rhrkxx/ Ks2AYg8OeIyZPoIVxYAy6EnyHFqHGdqKbvhsCp+9tho77fg8rquxlZFcY 7kloJnYSVniIsSYWeOb59qCjHFk3m1f54uUfNP7pgZBOuA9/4z4SRTCfL Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10236"; a="306707268" X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="306707268" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2022 00:06:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,311,1635231600"; d="scan'208";a="478981191" Received: from ahunter-desktop.fi.intel.com ([10.237.72.92]) by orsmga006.jf.intel.com with ESMTP; 24 Jan 2022 00:06:51 -0800 From: Adrian Hunter To: Peter Zijlstra Cc: Alexander Shishkin , Andi Kleen , Arnaldo Carvalho de Melo , Jiri Olsa , linux-kernel@vger.kernel.org, Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, H Peter Anvin Subject: [PATCH 0/2] perf/x86/intel/pt: Add support for event tracing and TNT disabling Date: Mon, 24 Jan 2022 10:06:49 +0200 Message-Id: <20220124080651.2699107-1-adrian.hunter@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi As of Intel SDM (https://www.intel.com/sdm) version 076, there are 2 new Intel PT features called Event Trace and TNT-Disable. Event Trace exposes details about asynchronous events such as interrupts and VM-Entry/Exit. TNT-Disable disables TNT packets to reduce the tracing overhead, but with the result that exact control flow information is lost. Tools patches are being sent in a separate patch set, but can be found here: https://github.com/ahunter6/linux/tree/event-trace Alexander Shishkin (2): perf/x86/intel/pt: Add a capability and config bit for event tracing perf/x86/intel/pt: Add a capability and config bit for disabling TNTs arch/x86/events/intel/pt.c | 16 ++++++++++++++++ arch/x86/include/asm/intel_pt.h | 2 ++ arch/x86/include/asm/msr-index.h | 2 ++ 3 files changed, 20 insertions(+) Regards Adrian