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 C1784C433F5 for ; Fri, 10 Dec 2021 21:03:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344340AbhLJVGl (ORCPT ); Fri, 10 Dec 2021 16:06:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37074 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344326AbhLJVGc (ORCPT ); Fri, 10 Dec 2021 16:06:32 -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 1FA11C0617A2 for ; Fri, 10 Dec 2021 13:02:57 -0800 (PST) Received: by mail-yb1-xb49.google.com with SMTP id y125-20020a25dc83000000b005c2326bf744so18175865ybe.21 for ; Fri, 10 Dec 2021 13:02:57 -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=xddwdAJMp6I6Z0v7LWRJSLiJzn/lRzo6+JF/IV1IKTo=; b=MjCtIXKcQZrpd5IgWuJYPePULMskIFs3ccEIaUHB1pLPCQDSaLPJZFLicPyvdgMMNs QfrrqW6mGjnpYXaXoiZ9y8wtOn6xgx4OBcxPwn+5nVb9lbIE/vhCaXHzPFfnWZ97qMeC mQBrXCRrkiR2xpb02gzp7cHbujcBL/K8H7g4wfwNXBLqq+i9hcj1YROUA3uH21wdjlVU /+Fpimmw4MbMvLGB/5xBphbjpfQYohF3ffgqTAH/FGvNuZukB6E3advmWPGEVb8gsP/r ViXULqmyOCJhVsuaRfrsBcfVLDjZm7zQQ0aj2XdosEWS941Earnlmy8nyXBpFLs8l970 2k8Q== 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=xddwdAJMp6I6Z0v7LWRJSLiJzn/lRzo6+JF/IV1IKTo=; b=xXU+TZhJE2aXbhHCLDAOS05qI+Wvscuw/GuFDk5Z0WEPAsDRUWnr5FquzeebQJTWVx AjvkDpuaREvnKknJfAS+SuiYfq7DxV4lddDvQ4oj2+hmCo6h7aj5qW7xQRZSoE0YI1BS GmukotsU3dkafLH+n6Lzl7c634vz+5Bhg8tOP4LKirKzd2DZcciS200RvQtJPfXTocTc qx5YoIY+RLnyP4ETAj++/DZxogNzxbBIx5gHJU595OMTa1Gigu5l/49FnEAcDUJcRMuU oTr7Gzsj/1GFsxkv3JCAoZzqf9RD0SQ+m92rZHcJAqNw+Je6kOfdBtdGGVGnBOPsKD2Z pc9w== X-Gm-Message-State: AOAM530p13VCMkSFiPnnxprLj/3JtxshWOnjp2tcus5kJDHjv5h4b2z0 0p4XfcM/cGc1P/H7xIza3vgNy/PDE5LVpCX8XPZUc5+r4nIsnGrWX125abRerCiWLR6f509Y/Uk 0Z6L07NIU8pY6qAVy5fYsfXd1HUJYvm0+X6XfuMiTtf5zAEfn9CB/496NbawveFGAIpmQd3Ra X-Google-Smtp-Source: ABdhPJxgC7ZAZ4kVQdXStCzXL7vd8jzXO5gOPJyUCRgQ635p86aIIvU46Ksf6MDChutj0jbOP84RpxCDWddy X-Received: from uluru3.svl.corp.google.com ([2620:15c:2cd:202:7416:17a6:6678:d4d5]) (user=eranian job=sendgmr) by 2002:a25:328b:: with SMTP id y133mr16000904yby.233.1639170176284; Fri, 10 Dec 2021 13:02:56 -0800 (PST) Date: Fri, 10 Dec 2021 13:02:19 -0800 In-Reply-To: <20211210210229.2991238-1-eranian@google.com> Message-Id: <20211210210229.2991238-5-eranian@google.com> Mime-Version: 1.0 References: <20211210210229.2991238-1-eranian@google.com> X-Mailer: git-send-email 2.34.1.173.g76aa8bc2d0-goog Subject: [PATCH v4 04/14] 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, mpe@ellerman.id.au, maddy@linux.ibm.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 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, }; -- 2.34.1.173.g76aa8bc2d0-goog