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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 66DEAC433EF for ; Mon, 18 Apr 2022 06:48:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:References:Cc:To:From: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=SjyM39W2aNRk8Kbv10BKDH9yrxIN62Vrzcco4Lj2jf0=; b=g+IQ5Hn+Rf6YHm eI2SKZZVODDgtNiCh6Fm/8cEjsMEhQrc8ABEFFrHGlkAO2n4bfaixnunNN0SmlDnQr/leEVkDT/3t C4znu/qPuPpfEAnrz3KJKBC2O0HCRDakCdAVpu1d/GHWjblDu4jgvyC1+WmO8P8w+9gBZnDi8DzIY wG9dw6bWhQr/OK2HUF7muxUeFmhF1B3Y6SF+Se0sCvZ78S1oLLozv++tXMFtuvZCX0p1OehfPMz1U 2/QbOOFaekZFr0A9+bEqNxAMQ6J/EPQyNn2ucLCaVNHgCpDfBbuCW954J/+/pIheE/IjI15D6C8AZ 13QI99cg3nnAA5VDxlaw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ngLAW-00FpRS-2l; Mon, 18 Apr 2022 06:47:28 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ngLAS-00FpQU-Vq for linux-arm-kernel@lists.infradead.org; Mon, 18 Apr 2022 06:47:26 +0000 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 06A1AED1; Sun, 17 Apr 2022 23:47:20 -0700 (PDT) Received: from [192.168.225.231] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7C62B3F7B4; Sun, 17 Apr 2022 23:47:14 -0700 (PDT) Message-ID: Date: Mon, 18 Apr 2022 12:17:53 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH V5 0/8] perf: Expand perf_branch_entry Content-Language: en-US From: Anshuman Khandual To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, peterz@infradead.org, acme@kernel.org Cc: Robin Murphy , Suzuki Poulose , James Clark , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Thomas Gleixner , Will Deacon , linux-arm-kernel@lists.infradead.org References: <20220404045046.634522-1-anshuman.khandual@arm.com> In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220417_234725_168233_A757177A X-CRM114-Status: GOOD ( 12.88 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 4/11/22 11:16, Anshuman Khandual wrote: > > > On 4/4/22 10:20, 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 actually combines following patches and series into a single series. >> >> - https://lore.kernel.org/all/1642998653-21377-12-git-send-email-anshuman.khandual@arm.com/ >> - https://lore.kernel.org/all/1643348653-24367-1-git-send-email-anshuman.khandual@arm.com/ >> - https://lore.kernel.org/all/1645681014-3346-1-git-send-email-anshuman.khandual@arm.com/ >> >> This series applies on v5.18-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 >> >> Todo >> >> - Update perf report tool to process PERF_BR_EXTEND_ABI (when available), >> then fetch and report branch types from perf_branch_entry.new_type field. >> >> 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 V5: >> >> - Dropped patches [PATCH 1/10] and [PATCH 6/10] related to PERF_BR_[RET|IRQ] - merged >> via the commit cedd3614e5d9c809 ("perf: Add irq and exception return branch types") >> >> - Rebased series on v5.18-rc1 > > Gentle ping, any updates on this series ? Gentle ping, any updates on this series ? I have posted BRBE RFC V2 accommodating all these new perf ABI changes being proposed here. I would really appreciate reviews and/or suggestions on this series, which is essential and also prerequisite for the BRBE driver itself. https://lore.kernel.org/all/20220412115455.293119-1-anshuman.khandual@arm.com/ - Anshuman _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel