From nobody Wed Dec 17 18:20:14 2025 Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 430352F9DBC for ; Sat, 1 Nov 2025 15:44:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762011868; cv=none; b=QtznIyIPEnlMQ2amnnTNH+7p/1Fmm6yFilTKuSfJ9AH94AzUpCRi8hhYMpd2S3aiKDViTC0UPnX+DK0Ttx2SNHEhWpLzhg60SJuLqZYcIiyEoSMKslXdUhgCykirKUMoAHDRNcfRHj6aOUIxZOu32Hs7VzV7QzsToc5AFNaifLQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762011868; c=relaxed/simple; bh=pizzB9cRq+aT3hF9bgrZeiXgsMsAyZQ2bUTDm+uBFMU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Sc9qLqkH0k4tKfehxIVojsyYifq18XpEimIcOORzpoQt2nT4U9tgj/+hyPD5TyWgUO89bDQAojNV0KZLK7ruxG11zD/+YicZME2tLigUoeFEgQuCm3tep0LyOVGRxUNGb7cARqdWz3/syDrANPUHmXn+vJRbsOFnQj6ReuTYULc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com; spf=pass smtp.mailfrom=ventanamicro.com; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b=WbzOGzR7; arc=none smtp.client-ip=209.85.214.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b="WbzOGzR7" Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-27d3540a43fso32333875ad.3 for ; Sat, 01 Nov 2025 08:44:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1762011866; x=1762616666; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=7XnFRCS+sTtRhexwba7Np0dAUXiR2aGYN+xgEcH1cxk=; b=WbzOGzR7EZ21EGYkpi0SW/jclvIB1HG8csrLqC1mRo0HY8eGThmgPdfegsN3CZPStP dZOXcxzI4B3MTU3HO7Ru/4RbSgLXfKlYs55OlATdvJEtdXWungTXcBY8cjxL8+HexJzZ ONoPNKzxoF4mw6C9cagi6GsPGyfxaBbdbws2Uqk83vnA+CwoJi9YCg7OFDSaADc8Re7w cMFb660Fds0jx0xII8jcmOZ55EN8IAU0DCRAksEPRuqAMqIRpwgi2XOxyGuHUqH+BLig 7toWKtSImkOPJa3ysw72x06wXuIdUS0QFEgySN0kd6QFPSSXflljnNqkfX9PQywu7mm3 E9xg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762011866; x=1762616666; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7XnFRCS+sTtRhexwba7Np0dAUXiR2aGYN+xgEcH1cxk=; b=GrTYP70Skb4cZqmpdC+tQa8fqGk6un79xTnEKRD1PQfAZqSq41bsUss8ttUySXbOIe sc7q5bFKRxApoYRrMyG8jsKHnkWSqdnHLCr4lZxElJ30cZn/JpxfKRWsKD2vNmTu9r7Y xUpwRegPAtGHflXgC2TRzYtfrPyQJ6rOcGpaC5yUwb0CVDvh/p0D4m0Oq7iI8FMDbW1n kImUdoPwMDxiJg8pvZswj0csOQQgg/iiPOgpxRdgB/GLNS0yNhKM77OzNp2rAYcWhWXI YuX6+lOqpboaBf1tpSih4psH4k9YRxOB64s+RJTQ6zahZJzHgRUK6jw6SEcETNGwpaOW rQ5A== X-Forwarded-Encrypted: i=1; AJvYcCVnYtmsHG+GHzBRYvjkvLv5Tgq0T57CUuj5NOZO2rr7L1BzLsWPc1h0QJEbzsxhZSc6pbElzA3QTTQPL8w=@vger.kernel.org X-Gm-Message-State: AOJu0YwwRsml/TYWGW7+SUJLYOtf5jw6mnkQUHZUrdxRXU7sJcTcUOm3 vgnkg8CUnXSTBIYYb1+B7hqDOcYadmpfr7epHEzokkzetGOHND9jTWKJmZCXNR3Masg= X-Gm-Gg: ASbGncuZ4TKR7NlGE2LU9blEdobcMVqjEJMNLThskl5uGAYVkUMSDatcuyBFa/DfyiH j9fNlM6487rUdEQScqgFSp2uB/P753W7/2vEuR0krlu+8LhJW/acCJP19lsCpimMQY0REni+8Sv ktJ0PAuZEaAMhMha1a91ZK+hDlyNibZ20owSDaiJSMW36mnVekMIH7b+m87t/8pxUgQv/2WN1Tb kGprpC+k8mtTCj+A64SPNVVBNQRuj+68uBBXAV7ZJ2NBTnNa257F6FBdICev7xWY4IsCzRFhxgX /27dN58FeB1gvV+caJiq211bRz7PQj64ehOid5TZtxS0/a4NWVyQv4L8iMSY3PdyehT8krNKlwO Sz/dhiiLVoTL2FCXF8memMbbwx7FKhHhT/fUpfGVfIFENaAhBWGtJ9jfVM8NeU3RaS/Vz/OHoGv 6rx2twj5ilIG0BoeDK3KPkYV11mGPwZPr5oaFEHK6h9w== X-Google-Smtp-Source: AGHT+IHqSK+MBUN/GAqGdH+BeccrIifT4o6CYolTjikOEjgbWEPinm6+JP4k2LJ8ohbiCjztsZFCQA== X-Received: by 2002:a17:902:ce81:b0:295:5945:2930 with SMTP id d9443c01a7336-29559452c6emr26600735ad.2.1762011866181; Sat, 01 Nov 2025 08:44:26 -0700 (PDT) Received: from localhost.localdomain ([122.171.20.36]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-295269bd2fesm59990105ad.105.2025.11.01.08.44.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Nov 2025 08:44:25 -0700 (PDT) From: Anup Patel To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Greg KH , Alexander Shishkin , Ian Rogers Cc: Alexandre Ghiti , Peter Zijlstra , Ingo Molnar , Namhyung Kim , Mark Rutland , Jiri Olsa , Adrian Hunter , Liang Kan , Mayuresh Chitale , Anup Patel , Atish Patra , Andrew Jones , Sunil V L , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Mayuresh Chitale , Anup Patel Subject: [PATCH v2 10/12] perf tools: Add RISC-V trace PMU record capabilities Date: Sat, 1 Nov 2025 21:12:43 +0530 Message-ID: <20251101154245.162492-11-apatel@ventanamicro.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251101154245.162492-1-apatel@ventanamicro.com> References: <20251101154245.162492-1-apatel@ventanamicro.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Mayuresh Chitale Introduce the required auxiliary API functions allowing the perf core to interact with RISC-V trace perf driver. Co-developed-by: Anup Patel Signed-off-by: Anup Patel Signed-off-by: Mayuresh Chitale --- tools/perf/arch/riscv/util/Build | 1 + tools/perf/arch/riscv/util/auxtrace.c | 218 ++++++++++++++++++++++++++ tools/perf/util/auxtrace.c | 1 + tools/perf/util/auxtrace.h | 1 + tools/perf/util/rvtrace.h | 18 +++ 5 files changed, 239 insertions(+) create mode 100644 tools/perf/arch/riscv/util/auxtrace.c create mode 100644 tools/perf/util/rvtrace.h diff --git a/tools/perf/arch/riscv/util/Build b/tools/perf/arch/riscv/util/= Build index 58a672246024..2ba1fb98a0ad 100644 --- a/tools/perf/arch/riscv/util/Build +++ b/tools/perf/arch/riscv/util/Build @@ -3,3 +3,4 @@ perf-util-y +=3D header.o =20 perf-util-$(CONFIG_LIBTRACEEVENT) +=3D kvm-stat.o perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) +=3D unwind-libdw.o +perf-util-$(CONFIG_AUXTRACE) +=3D auxtrace.o diff --git a/tools/perf/arch/riscv/util/auxtrace.c b/tools/perf/arch/riscv/= util/auxtrace.c new file mode 100644 index 000000000000..adc86bd38998 --- /dev/null +++ b/tools/perf/arch/riscv/util/auxtrace.c @@ -0,0 +1,218 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Risc-V E-Trace support + */ + +#include +#include +#include +#include +#include +#include + +#include // page_size +#include "../../../util/auxtrace.h" +#include "../../../util/cpumap.h" +#include "../../../util/debug.h" +#include "../../../util/event.h" +#include "../../../util/evlist.h" +#include "../../../util/evsel.h" +#include "../../../util/rvtrace.h" +#include "../../../util/pmu.h" +#include "../../../util/record.h" +#include "../../../util/session.h" +#include "../../../util/tsc.h" + +#define RVTRACE_PMU_NAME "rvtrace" +#define KiB(x) ((x) * 1024) +#define MiB(x) ((x) * 1024 * 1024) + +struct rvtrace_recording { + struct auxtrace_record itr; + struct perf_pmu *rvtrace_pmu; + struct evlist *evlist; +}; + +static size_t rvtrace_info_priv_size(struct auxtrace_record *itr __maybe_u= nused, + struct evlist *evlist __maybe_unused) +{ + return RVTRACE_AUXTRACE_PRIV_SIZE; +} + +static int rvtrace_info_fill(struct auxtrace_record *itr, struct perf_sess= ion *session, + struct perf_record_auxtrace_info *auxtrace_info, size_t priv_size) +{ + struct rvtrace_recording *ptr =3D container_of(itr, struct rvtrace_record= ing, itr); + struct perf_pmu *rvtrace_pmu =3D ptr->rvtrace_pmu; + + if (priv_size !=3D RVTRACE_AUXTRACE_PRIV_SIZE) + return -EINVAL; + + if (!session->evlist->core.nr_mmaps) + return -EINVAL; + + auxtrace_info->type =3D PERF_AUXTRACE_RISCV_TRACE; + auxtrace_info->priv[0] =3D rvtrace_pmu->type; + + return 0; +} + +static int rvtrace_set_auxtrace_mmap_page(struct record_opts *opts) +{ + bool privileged =3D perf_event_paranoid_check(-1); + + if (!opts->full_auxtrace) + return 0; + + if (opts->full_auxtrace && !opts->auxtrace_mmap_pages) { + if (privileged) { + opts->auxtrace_mmap_pages =3D MiB(16) / page_size; + } else { + opts->auxtrace_mmap_pages =3D KiB(128) / page_size; + if (opts->mmap_pages =3D=3D UINT_MAX) + opts->mmap_pages =3D KiB(256) / page_size; + } + } + + /* Validate auxtrace_mmap_pages */ + if (opts->auxtrace_mmap_pages) { + size_t sz =3D opts->auxtrace_mmap_pages * (size_t)page_size; + size_t min_sz =3D KiB(8); + + if (sz < min_sz || !is_power_of_2(sz)) { + pr_err("Invalid mmap size : must be at least %zuKiB and a power of 2\n", + min_sz / 1024); + return -EINVAL; + } + } + + return 0; +} + +static int rvtrace_recording_options(struct auxtrace_record *itr, struct e= vlist *evlist, + struct record_opts *opts) +{ + struct rvtrace_recording *ptr =3D container_of(itr, struct rvtrace_record= ing, itr); + struct perf_pmu *rvtrace_pmu =3D ptr->rvtrace_pmu; + struct evsel *evsel, *rvtrace_evsel =3D NULL; + struct evsel *tracking_evsel; + int err; + + ptr->evlist =3D evlist; + evlist__for_each_entry(evlist, evsel) { + if (evsel->core.attr.type =3D=3D rvtrace_pmu->type) { + if (rvtrace_evsel) { + pr_err("There may be only one " RVTRACE_PMU_NAME "x event\n"); + return -EINVAL; + } + evsel->core.attr.freq =3D 0; + evsel->core.attr.sample_period =3D 1; + evsel->needs_auxtrace_mmap =3D true; + rvtrace_evsel =3D evsel; + opts->full_auxtrace =3D true; + } + } + + err =3D rvtrace_set_auxtrace_mmap_page(opts); + if (err) + return err; + /* + * To obtain the auxtrace buffer file descriptor, the auxtrace event + * must come first. + */ + evlist__to_front(evlist, rvtrace_evsel); + evsel__set_sample_bit(rvtrace_evsel, TIME); + + /* Add dummy event to keep tracking */ + err =3D parse_event(evlist, "dummy:u"); + if (err) + return err; + + tracking_evsel =3D evlist__last(evlist); + evlist__set_tracking_event(evlist, tracking_evsel); + + tracking_evsel->core.attr.freq =3D 0; + tracking_evsel->core.attr.sample_period =3D 1; + evsel__set_sample_bit(tracking_evsel, TIME); + + return 0; +} + +static u64 rvtrace_reference(struct auxtrace_record *itr __maybe_unused) +{ + return rdtsc(); +} + +static void rvtrace_recording_free(struct auxtrace_record *itr) +{ + struct rvtrace_recording *ptr =3D + container_of(itr, struct rvtrace_recording, itr); + + free(ptr); +} + +static struct auxtrace_record *rvtrace_recording_init(int *err, struct per= f_pmu *rvtrace_pmu) +{ + struct rvtrace_recording *ptr; + + if (!rvtrace_pmu) { + *err =3D -ENODEV; + return NULL; + } + + ptr =3D zalloc(sizeof(*ptr)); + if (!ptr) { + *err =3D -ENOMEM; + return NULL; + } + + ptr->rvtrace_pmu =3D rvtrace_pmu; + ptr->itr.recording_options =3D rvtrace_recording_options; + ptr->itr.info_priv_size =3D rvtrace_info_priv_size; + ptr->itr.info_fill =3D rvtrace_info_fill; + ptr->itr.free =3D rvtrace_recording_free; + ptr->itr.reference =3D rvtrace_reference; + ptr->itr.read_finish =3D auxtrace_record__read_finish; + ptr->itr.alignment =3D 0; + + *err =3D 0; + return &ptr->itr; +} + +static struct perf_pmu *find_pmu_for_event(struct perf_pmu **pmus, + int pmu_nr, struct evsel *evsel) +{ + int i; + + if (!pmus) + return NULL; + + for (i =3D 0; i < pmu_nr; i++) { + if (evsel->core.attr.type =3D=3D pmus[i]->type) + return pmus[i]; + } + + return NULL; +} + +struct auxtrace_record *auxtrace_record__init(struct evlist *evlist, int *= err) +{ + struct perf_pmu *rvtrace_pmu =3D NULL; + struct perf_pmu *found_etm =3D NULL; + struct evsel *evsel; + + if (!evlist) + return NULL; + + rvtrace_pmu =3D perf_pmus__find(RVTRACE_PMU_NAME); + evlist__for_each_entry(evlist, evsel) { + if (rvtrace_pmu && !found_etm) + found_etm =3D find_pmu_for_event(&rvtrace_pmu, 1, evsel); + } + + if (found_etm) + return rvtrace_recording_init(err, rvtrace_pmu); + + *err =3D 0; + return NULL; +} diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 1539c1dc823c..c905563e0d8a 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -1394,6 +1394,7 @@ int perf_event__process_auxtrace_info(struct perf_ses= sion *session, case PERF_AUXTRACE_VPA_DTL: err =3D powerpc_vpadtl_process_auxtrace_info(event, session); break; + case PERF_AUXTRACE_RISCV_TRACE: case PERF_AUXTRACE_UNKNOWN: default: return -EINVAL; diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h index e0a5b39fed12..1c89a281a06c 100644 --- a/tools/perf/util/auxtrace.h +++ b/tools/perf/util/auxtrace.h @@ -51,6 +51,7 @@ enum auxtrace_type { PERF_AUXTRACE_S390_CPUMSF, PERF_AUXTRACE_HISI_PTT, PERF_AUXTRACE_VPA_DTL, + PERF_AUXTRACE_RISCV_TRACE, }; =20 enum itrace_period_type { diff --git a/tools/perf/util/rvtrace.h b/tools/perf/util/rvtrace.h new file mode 100644 index 000000000000..93c041db8660 --- /dev/null +++ b/tools/perf/util/rvtrace.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright(C) 2015 Linaro Limited. All rights reserved. + * Author: Mathieu Poirier + */ + +#ifndef INCLUDE__UTIL_PERF_RVTRACE_H__ +#define INCLUDE__UTIL_PERF_RVTRACE_H__ + +#include "debug.h" +#include "auxtrace.h" +#include "util/event.h" +#include "util/session.h" +#include + +#define RVTRACE_AUXTRACE_PRIV_SIZE sizeof(u64) + +#endif --=20 2.43.0