From patchwork Tue Aug 27 16:51:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leo Yan X-Patchwork-Id: 13779824 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 76DA6C5472F for ; Tue, 27 Aug 2024 16:57:03 +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=MewTf0GMdaq95V3xbZ5fyn+pS9mu/FXnMGa6+NKhCAY=; b=IQf6AyrYzurChPgXQwTvNsBPpX qCJAj7iCpIBjCZIzS5nqufIl/8WeKxnlhvz+twsCZz9fnXoL+hS5sHrIhKDcg+aflaEGe5CwmW7TS gZjKLKlB/Xbosyuu4nbdKrzrmKbG6MgMD84sx1RVfQo6A/5s98x5EvIvXrNUE0SJoOedwwQs75NY9 TLU1NnHGIuHPO8/WfvQz0RO77uiI+/czV1yQiMJrbJglNhPJQhU1SZOQLEmUf7ry4XV2PVMiN24gX H4MCaXmRD+UPkw1Bh2sSLUy4T4lMwogG3v1kpdumEDJAAc9ElnFB3Rd2rU4dwpzYyB/129uDhxghX VsvzhhRg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sizV0-0000000CAhQ-0X7y; Tue, 27 Aug 2024 16:56:54 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sizQ5-0000000C96g-36QY for linux-arm-kernel@lists.infradead.org; Tue, 27 Aug 2024 16:51:51 +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 84E071424; Tue, 27 Aug 2024 09:52:15 -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 525CB3F66E; Tue, 27 Aug 2024 09:51:47 -0700 (PDT) From: Leo Yan To: Arnaldo Carvalho de Melo , James Clark , Namhyung Kim , Ian Rogers , Jiri Olsa , Adrian Hunter , John Garry , Will Deacon , Mark Rutland , Mike Leach , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Leo Yan Subject: [PATCH v1 3/7] perf arm-spe: Introduce arm_spe__is_homogeneous() Date: Tue, 27 Aug 2024 17:51:21 +0100 Message-Id: <20240827165125.3311306-4-leo.yan@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240827165125.3311306-1-leo.yan@arm.com> References: <20240827165125.3311306-1-leo.yan@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240827_095149_858059_F668D093 X-CRM114-Status: GOOD ( 12.35 ) 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 2ab9078d49fc..e7ad52215066 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_num_cpu; + bool is_homogeneous; }; struct arm_spe_queue { @@ -1316,6 +1317,30 @@ static u64 *arm_spe__create_meta_blk(u64 *buf, int per_cpu_size) return metadata; } +static bool arm_spe__is_homogeneous(u64 **metadata, int num_cpu) +{ + u64 midr; + int i; + + if (!num_cpu) + return false; + + for (i = 0; i < num_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) { @@ -1384,6 +1409,7 @@ int arm_spe_process_auxtrace_info(union perf_event *event, spe->metadata = metadata; spe->metadata_ver = metadata_ver; spe->metadata_num_cpu = num_cpu; + spe->is_homogeneous = arm_spe__is_homogeneous(metadata, num_cpu); spe->timeless_decoding = arm_spe__is_timeless_decoding(spe);