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 X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D1C1DC433FE for ; Thu, 9 Sep 2021 07:58:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC694610C8 for ; Thu, 9 Sep 2021 07:58:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230325AbhIIIAE (ORCPT ); Thu, 9 Sep 2021 04:00:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230394AbhIIH75 (ORCPT ); Thu, 9 Sep 2021 03:59:57 -0400 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 B87FEC0613C1 for ; Thu, 9 Sep 2021 00:58:48 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id 63-20020a250d42000000b0059dc43162c9so1344602ybn.23 for ; Thu, 09 Sep 2021 00:58:48 -0700 (PDT) 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=KujjUUPlr+tuE5rUahYPqg4eiHhp2n+Zb/NK/Myctvg=; b=F067E2gt15Rj9kESLRbDsD5mAp/sNjHr/BJ3HrwEiDLBp0ES7eEhUiV+YoKBFAMpkH qCMYHYJ8aMyrQLcN4/9YFaD0ls3jnm0wF71RpdN1/UKpqsxCXu4pfhGIBv2aWGeGQUnA 6AG6RBnk0PWFyl6yUmxaL8u9kf8a6uYryUYGqggYWc0lAKidfRpdP2NMKkaqalpwYX9p LhllN3xj47s7ohO4xPxBZzoukwzk/eBtkXwicFzRJWlaMi6QrusLKZcq5D1v74Zkc2MJ l45EbMfWPcfW5xM6vTl8XZPDaebRXLGkVI5xIzdYOxiso7o/+mkeX/ZCbMOimBT0fS4C LgxQ== 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=KujjUUPlr+tuE5rUahYPqg4eiHhp2n+Zb/NK/Myctvg=; b=oz+7b/D/atwcEqOJ7ToGliRW1hxNJhfkhvcOMsSihLyT087SQDHDVFtmPeYuRqcH8n kAXCIHCKXzPtoqoiBRoClsUG0B689Dm8/Is2YqnMru2/UfyKgjNHqcJjobDTN4eGqm02 e9kQIEKHFD5nPRqLJUeKMck4cAYppegOxSpWyCydaaxMiPHasiK2/yzT4+uPbcbWaF5Y umhu1y65ILijz4s6TDCgSXq7djmFZWilWP4l4ZW7ihDGgpd8Gi6YP+XJZNafXZvcxfr8 FUljeuDdbGiMKAu+GkUbwQQ5Py5ASeRXNDMuPmr7yNZmil2sKVm8sNMXFpAAzAx98ST8 /9Rg== X-Gm-Message-State: AOAM531qq5yzuF7zCh6HDQOoWpBFdqhroqg1kQrQkg58O0iOfP5jy1rj 2x/4YUpsDL3fFAg3loS6PCAaekX/9pQa8I7bdViGohhx3BXDGpEKfjpuIDPHhZaYOFYvAgWCc5U KSaT80R1LGwre+UmX0E+qaemxPhwxLEKmEVdeaAIs9Yu2N8vGD23FdhX2dLN7F0oeYDi+DZ5i X-Google-Smtp-Source: ABdhPJw07XX+MtdYPwA+Q3Ijeyxm2zgkVGU/Z4kNSvmDhdUx3R9o77fAfpodb0uH/+aZcI1Fq70B/pWpEs9P X-Received: from uluru3.svl.corp.google.com ([2620:15c:2cd:202:f950:61f2:f1ec:ae8b]) (user=eranian job=sendgmr) by 2002:a25:ad52:: with SMTP id l18mr2106490ybe.453.1631174327886; Thu, 09 Sep 2021 00:58:47 -0700 (PDT) Date: Thu, 9 Sep 2021 00:56:51 -0700 In-Reply-To: <20210909075700.4025355-1-eranian@google.com> Message-Id: <20210909075700.4025355-5-eranian@google.com> Mime-Version: 1.0 References: <20210909075700.4025355-1-eranian@google.com> X-Mailer: git-send-email 2.33.0.153.gba50c8fa24-goog Subject: [PATCH v1 04/13] perf/x86/amd: add branch-brs helper event for Fam19h BRS From: Stephane Eranian To: linux-kernel@vger.kernel.org Cc: peterz@infradead.org, acme@redhat.com, jolsa@redhat.com, kim.phillips@amd.com, namhyung@kernel.org, irogers@google.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds 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 86adb0e879c6..d6d5119260a9 100644 --- a/arch/x86/events/amd/core.c +++ b/arch/x86/events/amd/core.c @@ -1106,8 +1106,24 @@ 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, }; -- 2.33.0.153.gba50c8fa24-goog