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 C3A44C433EF for ; Tue, 8 Feb 2022 22:34:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1387644AbiBHWbY (ORCPT ); Tue, 8 Feb 2022 17:31:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37544 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1386846AbiBHVRD (ORCPT ); Tue, 8 Feb 2022 16:17:03 -0500 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E5C8C0612B8 for ; Tue, 8 Feb 2022 13:17:02 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id a12-20020a056902056c00b0061dc0f2a94aso387895ybt.6 for ; Tue, 08 Feb 2022 13:17:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=hpYRwQLRBekfx+PCqt9/1HSAYQriRfUkssje8sUgZSw=; b=sOK4RMt818cUZPOEOHeyV19TBhn5uBFBKquSjktW5SYy6qRp9nBkRB82fA/OVrQjbT zau9QpGFLq0wy5gqkLyktdJ/aVwh/ojsgDGOtbvxJZf1hkv5G/7vXYBwFrpS1Uq3HNEI ue/kBM5PmsKiJMkyb6+pSVEC8gVxrSvyPnpj1zhvFbVmCaT4SVVJ1VUniIDOkdaBGCZi RhIurQT6LcLl3Db57CNeL4P9lc7NX4fzwSg5TwmKlwme9XdHYekJeq5d55zAR6qnAf84 nkcHMYvnUwAWz1l4fHySz7vdZYVT+Vh4z/3jNBoPfLTrPKiZeUlfQT4zZ9AE9hlG2A++ ftCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=hpYRwQLRBekfx+PCqt9/1HSAYQriRfUkssje8sUgZSw=; b=hGti+he40Usil3qtJAxTfBSNRVnKBk3Kc+TiGa8agcqc7HYWqfeXslM+nm2PK3X94L v5zLsONo9PnK74Dbi60CsLCBRndO20sWP/V9wLaTKPsytDkaCPTsrB0zbhORjh13pVtN SP+1EGlt7fu5yX242mSzgfD0t++7XRhYoYoI9ziAS+nq4cxi4Ny3sZbHVnrtVmvVw6bB xZ3/YxjgM52uzej41gaoGAgP9BZGzzJaXBtRyiO9mkdQDxhK2Y5WE0LbiI3+HNqki8IG Tc6dLhs3ph6T74HhBBTa3XJN8aHCXrptJo+RSDtoekf+xTCH4Caa6ABIrnVNBJm1GSR/ wNIA== X-Gm-Message-State: AOAM5308KorsR5YhbklsNIe+JUUGWymk6ZSpd7vAa/jX8jJ9S/2KH/Je Iq98h3PtLG/m11xmi8bnuZ/fPvYCD2CrIbGz3l7cCovQkPJAzfncKMHdCds0oHaXEWXq3HQQnZJ +H1m6lt6dl6LkgEsg4d2Uefnc0LmqMFGNjR0i9pSzlX8I4lGUjS/SNKZ1WXYjjGkWeWZ37XEl X-Google-Smtp-Source: ABdhPJz4tSKHW4S5Dd8IpdL9PG0xNiIntmhIVsFrDAE+HRTSNUI+YCx8meMBdWzz6F4B/Kf9Z3Kclf0o1xzY X-Received: from uluru3.svl.corp.google.com ([2620:15c:2cd:202:6875:3c51:69be:6e2c]) (user=eranian job=sendgmr) by 2002:a25:e803:: with SMTP id k3mr6732621ybd.571.1644355021597; Tue, 08 Feb 2022 13:17:01 -0800 (PST) Date: Tue, 8 Feb 2022 13:16:29 -0800 In-Reply-To: <20220208211637.2221872-1-eranian@google.com> Message-Id: <20220208211637.2221872-5-eranian@google.com> Mime-Version: 1.0 References: <20220208211637.2221872-1-eranian@google.com> X-Mailer: git-send-email 2.35.0.263.gb82422642f-goog Subject: [PATCH v6 04/12] perf/x86/amd: add branch-brs helper event for Fam19h BRS From: Stephane Eranian To: linux-kernel@vger.kernel.org Cc: peterz@infradead.org, kim.phillips@amd.com, acme@redhat.com, jolsa@redhat.com, songliubraving@fb.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a pseudo event called branch-brs to help use the FAM Fam19h Branch Sampling feature (BRS). BRS samples taken branches, so it is best used when sampling on a retired taken branch event (0xc4) which is what BRS captures. Instead of trying to remember the event code or actual event name, users can simply do: $ perf record -b -e cpu/branch-brs/ -c 1000037 ..... Signed-off-by: Stephane Eranian --- arch/x86/events/amd/core.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c index 44d8f618bb3e..597defee1e02 100644 --- a/arch/x86/events/amd/core.c +++ b/arch/x86/events/amd/core.c @@ -1105,8 +1105,24 @@ static struct attribute_group group_caps_amd_brs = { .is_visible = amd_brs_is_visible, }; +#define AMD_FAM19H_BRS_EVENT 0xc4 /* Fam19h RETIRED_TAKEN_BRANCH_INSTRUCTIONS */ +EVENT_ATTR_STR(branch-brs, amd_branch_brs, + "event=" __stringify(AMD_FAM19H_BRS_EVENT)"\n"); + +static struct attribute *amd_brs_events_attrs[] = { + EVENT_PTR(amd_branch_brs), + NULL, +}; + +static struct attribute_group group_events_amd_brs = { + .name = "events", + .attrs = amd_brs_events_attrs, + .is_visible = amd_brs_is_visible, +}; + static const struct attribute_group *amd_attr_update[] = { &group_caps_amd_brs, + &group_events_amd_brs, NULL, }; -- 2.35.0.263.gb82422642f-goog