From patchwork Thu Oct 3 18:53:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leo Yan X-Patchwork-Id: 13821449 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 7DDBECF34BC for ; Thu, 3 Oct 2024 18:57:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ivVZ23ax9CDR3F+gC5fsBlOsDcTgkZWuhvRzEQLs0cw=; b=m5KODby5ixzuewi+TjubCITLHD bfHRU6UK6F918zlNavDHcKjTxSn0ZJiYsFG1gOV4A6jAvgePS4U4anIVsCAQrnbm+zLY3t7BqxV2x 1wMOzAkVM1lEq51aYqtUohfRNA6YKc4PIV0R3hP5HwLwVUg8T2lenBxb9K6Y4hnFhO/7vKDbwvhac /670ivfO1AnCn1IqwilVqx/srrHp/tJS1fcRfSUuo/1lJab3Nz1vwQk/oj2aMa9yc7OZKDwNrUMu3 jMmCc3rH2aJlxUX25mL/4p912V31m/d7JbiwWzffeNafNR8eLs3DakhzzEBR7uxqINRuW63BIZceQ 6TwdEEFg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1swR0v-0000000A8yN-3juS; Thu, 03 Oct 2024 18:57:25 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1swQxK-0000000A8C7-1QwK for linux-arm-kernel@lists.infradead.org; Thu, 03 Oct 2024 18:53:43 +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 48AFD14BF; Thu, 3 Oct 2024 11:54:11 -0700 (PDT) Received: from e132581.cambridge.arm.com (e132581.arm.com [10.2.76.71]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id B75103F640; Thu, 3 Oct 2024 11:53:39 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , Namhyung Kim , Besar Wicaksono , James Clark , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , John Garry , Will Deacon , Mike Leach , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Leo Yan Subject: [PATCH v3 3/7] perf arm-spe: Introduce arm_spe__is_homogeneous() Date: Thu, 3 Oct 2024 19:53:18 +0100 Message-Id: <20241003185322.192357-4-leo.yan@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241003185322.192357-1-leo.yan@arm.com> References: <20241003185322.192357-1-leo.yan@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241003_115342_446514_5EE49A0A X-CRM114-Status: GOOD ( 12.52 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Introduce the arm_spe__is_homogeneous() function, it uses to check if Arm SPE is homogeneous cross all CPUs. Signed-off-by: Leo Yan --- tools/perf/util/arm-spe.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c index b0e9eb6057c3..587943b6bdb8 100644 --- a/tools/perf/util/arm-spe.c +++ b/tools/perf/util/arm-spe.c @@ -82,6 +82,7 @@ struct arm_spe { u64 **metadata; u64 metadata_ver; u64 metadata_nr_cpu; + bool is_homogeneous; }; struct arm_spe_queue { @@ -1374,6 +1375,30 @@ arm_spe_synth_events(struct arm_spe *spe, struct perf_session *session) return 0; } +static bool arm_spe__is_homogeneous(u64 **metadata, int nr_cpu) +{ + u64 midr; + int i; + + if (!nr_cpu) + return false; + + for (i = 0; i < nr_cpu; i++) { + if (!metadata[i]) + return false; + + if (i == 0) { + midr = metadata[i][ARM_SPE_CPU_MIDR]; + continue; + } + + if (midr != metadata[i][ARM_SPE_CPU_MIDR]) + return false; + } + + return true; +} + int arm_spe_process_auxtrace_info(union perf_event *event, struct perf_session *session) { @@ -1419,6 +1444,7 @@ int arm_spe_process_auxtrace_info(union perf_event *event, spe->metadata = metadata; spe->metadata_ver = metadata_ver; spe->metadata_nr_cpu = nr_cpu; + spe->is_homogeneous = arm_spe__is_homogeneous(metadata, nr_cpu); spe->timeless_decoding = arm_spe__is_timeless_decoding(spe);