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 A52A7C433EF for ; Wed, 29 Jun 2022 04:44:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230472AbiF2Eob (ORCPT ); Wed, 29 Jun 2022 00:44:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229591AbiF2EoY (ORCPT ); Wed, 29 Jun 2022 00:44:24 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D08CA1055A; Tue, 28 Jun 2022 21:44:23 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id AAF02152B; Tue, 28 Jun 2022 21:44:23 -0700 (PDT) Received: from [10.162.41.8] (unknown [10.162.41.8]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9BE9A3F66F; Tue, 28 Jun 2022 21:44:18 -0700 (PDT) Message-ID: Date: Wed, 29 Jun 2022 10:14:15 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [PATCH V6 0/8] perf: Expand perf_branch_entry Content-Language: en-US To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, peterz@infradead.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, acme@kernel.org Cc: Robin Murphy , Suzuki Poulose , James Clark , Ingo Molnar , Mark Rutland , Namhyung Kim , Thomas Gleixner , Will Deacon , linux-arm-kernel@lists.infradead.org References: <20220610035101.424112-1-anshuman.khandual@arm.com> From: Anshuman Khandual In-Reply-To: <20220610035101.424112-1-anshuman.khandual@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/10/22 09:20, Anshuman Khandual wrote: > Branch Record Buffer Extension (BRBE) implementation on arm64 captures more > branch type classification which cannot be accommodated in the current perf > branch record format via perf_branch_entry.type element (4 bit field). Also > it captures privilege information which does not have a corresponding slot > in perf_branch_entry. This series expands struct perf_branch_entry, to meet > both these requirements without breaking the existing user space ABI for > perf tools. > > All architecture specific branch types added via perf_branch_entry.new_type > field in [PATCH 3/4] will be used in BRBE implementation on arm64 platform > later on with the following map. > > #ifdef CONFIG_ARM64 > #define PERF_BR_FIQ PERF_BR_NEW_ARCH_1 > #define PERF_BR_DEBUG_HALT PERF_BR_NEW_ARCH_2 > #define PERF_BR_DEBUG_EXIT PERF_BR_NEW_ARCH_3 > #define PERF_BR_DEBUG_INST PERF_BR_NEW_ARCH_4 > #define PERF_BR_DEBUG_DATA PERF_BR_NEW_ARCH_5 > #endif > > This series applies on v5.19-rc1 > > perf API > > The series being applied > > - Clean : tools/perf/check-headers.sh > - Clean : diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h > > References > > - BRBE captured branch record information > > https://developer.arm.com/documentation/ddi0601/2021-12/AArch64-Registers/BRBINF-n--EL1--Branch-Record-Buffer-Information-Register--n-?lang=en > > - BRBE based perf branch stack implementation on arm64 platform > > https://lore.kernel.org/all/1642998653-21377-1-git-send-email-anshuman.khandual@arm.com/ > > Changes in V6: > > - Process PERF_BR_EXTEND_ABI in perf tools and fetch from perf_branch_entry.new_type > - Modified the commit message for [PATCH 1/8] Any updates on this series ?