From patchwork Wed Aug 1 21:36:40 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaldo Carvalho de Melo X-Patchwork-Id: 10553053 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3F30613BF for ; Wed, 1 Aug 2018 21:38:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2BECC2B6FC for ; Wed, 1 Aug 2018 21:38:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 204562B715; Wed, 1 Aug 2018 21:38:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8C4302B6FC for ; Wed, 1 Aug 2018 21:38:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=4sBRW54lvxC1Z+byQVStZhxe2onqY45PaLv7H6Gjbho=; b=XQQaofF/ZjhAjOq0rPqSAJzHYW 2GvwW5N7/NxCSDP7gk6hSKfk88/GScKwrtYDzLg/Ebs5iZayBlZNTsJsRfJRpKKPNzSPZSNwtp4vt ml8YdQ9u3gO8NzHeUJyoycWni/O+WP/YNwLE1A7yqw9CydFfcaFMb7/w5O/l9HdLfAP1NOZxVS/j9 Pcnnqte+SqSPtUno84f6VWJ9IUrorpbLO7VEgqXIqCWzSQaCD/gA6vdQwSuPTEt+/3UMtKyByFmQF PnreRyRlifEqgOGl3O+iQasCv66lxY6LPmyLvWGSUXYs7W2wshc9moob4b14QY0uOGX2zVD8p2BmD OA85J4bw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fkyoe-00079M-Fz; Wed, 01 Aug 2018 21:37:56 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fkyoY-00075w-BG for linux-arm-kernel@lists.infradead.org; Wed, 01 Aug 2018 21:37:54 +0000 Received: from jouet.infradead.org (unknown [179.97.41.186]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 833EB208AF; Wed, 1 Aug 2018 21:37:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1533159463; bh=P3EbxfSbhAlP0lDHU95I527JUVWMv16Ylkjp3mX0IUA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n3Gy9xfTjEeeWZSwDOXS3rbu8BDNrT3FQpXuDa+dcTzYeLn0sJmfpobUDBxnDkNMH bKdfAOu1jWZO/kTmEG4l2vE/629KXYDncu5ldQnj9sUQJ4LyVgtwv5mFzjxwfli/kQ Q4mgVDG8BUhfyy2G2/szg6AuPYKdb6aoAAXtsLcw= From: Arnaldo Carvalho de Melo To: Ingo Molnar Subject: [PATCH 13/21] perf cs-etm: Support dummy address value for CS_ETM_TRACE_ON packet Date: Wed, 1 Aug 2018 18:36:40 -0300 Message-Id: <20180801213648.4814-14-acme@kernel.org> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20180801213648.4814-1-acme@kernel.org> References: <20180801213648.4814-1-acme@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180801_143750_513414_D7B9399B X-CRM114-Status: GOOD ( 15.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Arnaldo Carvalho de Melo , Kim Phillips , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Alexander Shishkin , Peter Zijlstra , Leo Yan , Namhyung Kim , Robert Walker , Jiri Olsa , linux-arm-kernel@lists.infradead.org, Mike Leach MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Leo Yan For CS_ETM_TRACE_ON packet, its fields 'packet->start_addr' and 'packet->end_addr' equal to 0xdeadbeefdeadbeefUL which are emitted in the decoder layer as dummy value, but the dummy value is pointless for branch sample when we use 'perf script' command to check program flow. This patch is a preparation to support CS_ETM_TRACE_ON packet for branch sample, it converts the dummy address value to zero for more readable; this is accomplished by cs_etm__last_executed_instr() and cs_etm__first_executed_instr(). The later one is a new function introduced by this patch. Signed-off-by: Leo Yan Reviewed-by: Mathieu Poirier Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Kim Phillips Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Robert Walker Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1531295145-596-5-git-send-email-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/cs-etm.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index ae7c9c880cb2..976db8483478 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -494,6 +494,10 @@ static inline void cs_etm__reset_last_branch_rb(struct cs_etm_queue *etmq) static inline u64 cs_etm__last_executed_instr(struct cs_etm_packet *packet) { + /* Returns 0 for the CS_ETM_TRACE_ON packet */ + if (packet->sample_type == CS_ETM_TRACE_ON) + return 0; + /* * The packet records the execution range with an exclusive end address * @@ -505,6 +509,15 @@ static inline u64 cs_etm__last_executed_instr(struct cs_etm_packet *packet) return packet->end_addr - A64_INSTR_SIZE; } +static inline u64 cs_etm__first_executed_instr(struct cs_etm_packet *packet) +{ + /* Returns 0 for the CS_ETM_TRACE_ON packet */ + if (packet->sample_type == CS_ETM_TRACE_ON) + return 0; + + return packet->start_addr; +} + static inline u64 cs_etm__instr_count(const struct cs_etm_packet *packet) { /* @@ -546,7 +559,7 @@ static void cs_etm__update_last_branch_rb(struct cs_etm_queue *etmq) be = &bs->entries[etmq->last_branch_pos]; be->from = cs_etm__last_executed_instr(etmq->prev_packet); - be->to = etmq->packet->start_addr; + be->to = cs_etm__first_executed_instr(etmq->packet); /* No support for mispredict */ be->flags.mispred = 0; be->flags.predicted = 1; @@ -701,7 +714,7 @@ static int cs_etm__synth_branch_sample(struct cs_etm_queue *etmq) sample.ip = cs_etm__last_executed_instr(etmq->prev_packet); sample.pid = etmq->pid; sample.tid = etmq->tid; - sample.addr = etmq->packet->start_addr; + sample.addr = cs_etm__first_executed_instr(etmq->packet); sample.id = etmq->etm->branches_id; sample.stream_id = etmq->etm->branches_id; sample.period = 1;