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 A9058C2BA4C for ; Wed, 26 Jan 2022 10:48:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240248AbiAZKsV (ORCPT ); Wed, 26 Jan 2022 05:48:21 -0500 Received: from mga05.intel.com ([192.55.52.43]:10953 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240212AbiAZKsU (ORCPT ); Wed, 26 Jan 2022 05:48:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643194100; x=1674730100; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=vv57DJifcsENs5tGulRi3mJmeUn2LUXarXjXGXywB80=; b=DOqdc+Dtdgj8kNLuIhvBV4jdSreiKc4gko7RLaAnol3wfV5GVGOxizTD ACSpl3IgcCl/Br0pfU1W5BYEGt7fqU52WGN1EELUuq8WvihRnmOn0XdXe v7qz0IK/mfiZJ0YiOobLxoSM5UjDZJm/iLdpzXzBnHkkkNRTKzgV4BZ/J kAo2FYWvgwlwhp9FxuxHIGExux3Ed+EcOsLLoT/5b2Cf1yQOdvPhcPdmY JuDFgFLnR8VbSG6dDI772vspMpNJkuEEGOwpedEKlMOyNnYyjDHHCvMb/ bITCyl9RVqPU0CmmmXZf7QmzLkNnVC12OX6OsBCg0LZr/oR7sFOR0oAOp A==; X-IronPort-AV: E=McAfee;i="6200,9189,10238"; a="332878453" X-IronPort-AV: E=Sophos;i="5.88,317,1635231600"; d="scan'208";a="332878453" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2022 02:48:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,317,1635231600"; d="scan'208";a="674323258" Received: from ahunter-desktop.fi.intel.com ([10.237.72.92]) by fmsmga001.fm.intel.com with ESMTP; 26 Jan 2022 02:48:16 -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 V2 0/2] perf/x86/intel/pt: Add support for event tracing and TNT disabling Date: Wed, 26 Jan 2022 12:48:13 +0200 Message-Id: <20220126104815.2807416-1-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 Changes in V2: Add my SOB 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