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 772F4C433EF for ; Tue, 22 Mar 2022 22:15:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237742AbiCVWRT (ORCPT ); Tue, 22 Mar 2022 18:17:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237621AbiCVWRF (ORCPT ); Tue, 22 Mar 2022 18:17:05 -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 0A48353A44 for ; Tue, 22 Mar 2022 15:15:36 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id w1-20020a5b08c1000000b00633be107f28so4650407ybq.4 for ; Tue, 22 Mar 2022 15:15:36 -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=SbI28V3sKLSa4XoImm+sfIA9Q4EtRHUUKQBKqzRI7DY=; b=DTSsjBhp5gYYpEzRMYZjo1IxELiQU46lI4846oN1VTD5AoO0wUANZAeEzy98aM+AZJ HX3uctWKzV5DexeN8XQ3JT30wXgLQmW5i7kUTPy4OEEV4RnBdqEP62VncCRhzvFQxbNW p4h4X0Jonj5IszUCjmXkKcbBp70WzW8Fk4Ju/jhMGfltnPSLp/RK8i/elAzGDAqoOtyo feGwk+nIswbQB2anC/ZqAoA8VO1eJlCyBjcxVcHGci7gLPDDgabV2RAOzH7oynwmCmcY rKJ+tXWRv80B7KvSftznyU8MmnRXAnjVtdGAjiSELU6MLLtTZYNNbV6BTCd3C4jiLbeo BXfQ== 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=SbI28V3sKLSa4XoImm+sfIA9Q4EtRHUUKQBKqzRI7DY=; b=EVIY28H3q7Mwng7WmeByq4ASCuje5vf4aqFVk1jt8d0hK8U1imBhovajFQeYLMd3uI a013TKyYSQ4CGtcgGUSPP8PLfuHt7Ni5cPYwlqwoRSDUlVHWdqh19PaU0qI+c7KWf0rP Ec9A23OQOB/kYZTY95iIOMZmhbG7/+crY8V8iPJOX21uiKW0CJKcsfHUEMT/14X/Mcgr kCypyf5K8Tn5ygPYO5uQxDFrMGv8euqaaV6toO4MiXpusAXBfJjKmGjWI2DbdMrzM+YH Jj3V6prImSUN+8Xfw7kTvVXSrUssqWavOUSmyc7wwsPUeMReGpUIbdXT/ueCVmnwPtsT xUJA== X-Gm-Message-State: AOAM533YOEiOkXzccZKP5iW0+Q3V+4WaRmq8kqm51RjVLyugZ0tD/MmB ic0Rryx3s02fkX+dENgrW5oXZIYJU4Uol4+X7U1CFlUvhNbuJjjEaGVebeKUkVx78bFePH3BSGK jiGv11JrLllI8dlVbXDXqsg4ejWPyCJdIvIBSBGzqQzgaw+AWJTbQQE8vIzsWEjOlP8MkNeYx X-Google-Smtp-Source: ABdhPJzzv2CTC+EpZ16zirkZ23P+0poq/22QQ+iK1T3zJntMo1771uM4p0PDBfElPR7fZy8uQ9ZUB8wX2931 X-Received: from uluru3.svl.corp.google.com ([2620:15c:2cd:202:1817:acc9:c45f:d133]) (user=eranian job=sendgmr) by 2002:a25:f506:0:b0:628:9da9:cf44 with SMTP id a6-20020a25f506000000b006289da9cf44mr29522401ybe.595.1647987335151; Tue, 22 Mar 2022 15:15:35 -0700 (PDT) Date: Tue, 22 Mar 2022 15:15:08 -0700 In-Reply-To: <20220322221517.2510440-1-eranian@google.com> Message-Id: <20220322221517.2510440-5-eranian@google.com> Mime-Version: 1.0 References: <20220322221517.2510440-1-eranian@google.com> X-Mailer: git-send-email 2.35.1.894.gb6a874cedc-goog Subject: [PATCH v7 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, kim.phillips@amd.com, acme@redhat.com, jolsa@redhat.com, songliubraving@fb.com, rafael@kernel.org, ravi.bangoria@amd.com, sandipan.das@amd.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 | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c index c7ac70d8ed9a..f7bce8364fe4 100644 --- a/arch/x86/events/amd/core.c +++ b/arch/x86/events/amd/core.c @@ -1145,8 +1145,23 @@ static struct attribute_group group_caps_amd_brs = { .is_visible = amd_brs_is_visible, }; +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, }; -- 2.35.1.894.gb6a874cedc-goog