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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DA16FCCFA00 for ; Sat, 1 Nov 2025 15:44:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oqmHJuRqz4e8Vlfu6bJyUGeMWT7ukhxSffdMoAgCnSk=; b=xuwUlqUhXZXMSJ Jv5IdgvvWdxUzzEThVlfPi2WBghc991kBuV3uN1O3t+RoaeqejcFgOTPHV6lOIzFPX1R4o2Q+WPQk QL2TqCSwYXy61slyIOUFa6Crhs5bp4usee5fZmOsyezsrffd9Bh6BGmATTB4n0TRYHtGBm3NFb2Tq CR1AoUqcjCVWnJ7kQWQFvQkqfoMX5myzRN+cNFcVWIM70V64j0hGd+dBRpIhdxHmkeCgGcRl4XvtG BcftLe8sh84CnVe3xQedyaQrn1gd785ZG8lOpwtwALoqtDoZMUbjz3/j6u5CG4LPuHTXtmRksWlPx 8MnkuJQDeeNRCGeO9Vsg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vFDmH-00000007tMB-2GzZ; Sat, 01 Nov 2025 15:44:29 +0000 Received: from mail-pl1-x62e.google.com ([2607:f8b0:4864:20::62e]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vFDmF-00000007tKQ-0LJg for linux-riscv@lists.infradead.org; Sat, 01 Nov 2025 15:44:28 +0000 Received: by mail-pl1-x62e.google.com with SMTP id d9443c01a7336-27d3540a43fso32333895ad.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=lists.infradead.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=RA6Uvits3+sctrYQ+cqoA+BY8YBgBg0u6H9D9WAwINU6eBCzrW5Uzi81gVt7SEecXM g6XpuYPCyjiYY4zi6Md1BxmDCSt8gihb96gNxbg9eh0P4RFSNRmTG031KDE28v3q7Fqj c1mTpjzB/vx+N3NCZ2ULEUJmpqdxOA2OzrhzSapAEJk0s5keiYmjul3w2fzEi9ylOKO2 7/ikiMOrmN7p6TXwJZUJx85SSOwtNY7Vvjj+l87Yhe5aTLiHczwELJpqzA7niphe9P+t d8l5foq+7GVJxhH7eIQcw2OAEIOj3LPJRLCUYCBMZIB4M5q1kdr6vqqszwLfSEHA47RE 6urA== 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=wVnwt9lAYpJ18rqypmXlDmpi9t8v2OTMya2s7u1bbP4sWOGHVIt45e6ldP5n7puVb4 DCvtPhgi4NrmV4JswqW1+ZYZpWN9QdAofnzGxmkXLJCTUakc2eofYdk3j7HZCPVMSmzm cqALqn7Rj8HKaW/rKSTsnFeEMyQcJOu3uFAWHx0iqAQINJz0w6cuiS0sSk/SX4ayxadb i4OC5jgWie/G/4/mUHjLH5HZ+U/4eoh6qA0TrGl5kemAIWU9lLYRd/F4du+0EDc430gV /gSjUTImU9bGYu7TKmI5iUOxrGKgj3TmbmYHFQ+i5DsnRazmmwINnpgpB22rHTGYuw1t oWAQ== X-Forwarded-Encrypted: i=1; AJvYcCUkIKZfE+BJP1QGqYhqKJWDdm4RCJ9CnUNHK54Hm1hCtISNSAqU1eKW6j0X3NSqJYWaBenWoA1afaL55A==@lists.infradead.org X-Gm-Message-State: AOJu0YzOc5UicxIV0UVldJZ6y9/BPBYQGyiZDgSRdnrXIN67hMW2k/nh VjNcn9FcDUKoaw4rs7BstO1I8UKlswLjVGSgSXdC3IhgboXv3tsTEJB9J1lZbEtESaE= X-Gm-Gg: ASbGncvJ9u6erdMrSL1VzsD5iF8r9O/mNubOdJ0JBgTWhxHEzD0Um+DvM9pZwLVs6jE 75VWFzhiAEKl8YCmXeBKL7KKrKfAPtOfZ0K77wrFxenjWq+TUJPaPXv9a6hdo3NLIrj6X/XFHaq qDdInYmj7cEvT2ybBB8Bl2A2jR75Fkw5OZlxuLWlROpng7m5IoxRoWY7LjxTrvkDtJCe2BfcPqo BLP8MloFQtVFnTItvvTNQhsrqCu+otbCT8w0mVyRmQZhSCni2hIddqnX8S6ph/ewo2WEIzEgZCJ eP2WVaUCbeL7O507HgIU7lhyGHC5IugRTetKUGw+1yUNgaFPNbEsH/OeMbFIBVpbpP0dncgxlD1 OtlRV1Kx0bdnlAdSM1dfBuV7b4fe3wtRap9AsAiKszvIRI95pWy2CZNwjLtGqmGjFAzQpL3NM5N ZUF18Ag4RYM15Ps5UHXpHVclOQNcMaYog1oLEVBCMvDA== 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 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> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251101_084427_136782_17C6077A X-CRM114-Status: GOOD ( 22.16 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Alexandre Ghiti , Atish Patra , Peter Zijlstra , Anup Patel , Adrian Hunter , linux-kernel@vger.kernel.org, Mayuresh Chitale , Ingo Molnar , Jiri Olsa , Anup Patel , Mayuresh Chitale , Namhyung Kim , linux-riscv@lists.infradead.org, Andrew Jones , Liang Kan Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org 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 += header.o perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o +perf-util-$(CONFIG_AUXTRACE) += 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_unused, + struct evlist *evlist __maybe_unused) +{ + return RVTRACE_AUXTRACE_PRIV_SIZE; +} + +static int rvtrace_info_fill(struct auxtrace_record *itr, struct perf_session *session, + struct perf_record_auxtrace_info *auxtrace_info, size_t priv_size) +{ + struct rvtrace_recording *ptr = container_of(itr, struct rvtrace_recording, itr); + struct perf_pmu *rvtrace_pmu = ptr->rvtrace_pmu; + + if (priv_size != RVTRACE_AUXTRACE_PRIV_SIZE) + return -EINVAL; + + if (!session->evlist->core.nr_mmaps) + return -EINVAL; + + auxtrace_info->type = PERF_AUXTRACE_RISCV_TRACE; + auxtrace_info->priv[0] = rvtrace_pmu->type; + + return 0; +} + +static int rvtrace_set_auxtrace_mmap_page(struct record_opts *opts) +{ + bool privileged = 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 = MiB(16) / page_size; + } else { + opts->auxtrace_mmap_pages = KiB(128) / page_size; + if (opts->mmap_pages == UINT_MAX) + opts->mmap_pages = KiB(256) / page_size; + } + } + + /* Validate auxtrace_mmap_pages */ + if (opts->auxtrace_mmap_pages) { + size_t sz = opts->auxtrace_mmap_pages * (size_t)page_size; + size_t min_sz = 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 evlist *evlist, + struct record_opts *opts) +{ + struct rvtrace_recording *ptr = container_of(itr, struct rvtrace_recording, itr); + struct perf_pmu *rvtrace_pmu = ptr->rvtrace_pmu; + struct evsel *evsel, *rvtrace_evsel = NULL; + struct evsel *tracking_evsel; + int err; + + ptr->evlist = evlist; + evlist__for_each_entry(evlist, evsel) { + if (evsel->core.attr.type == 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 = 0; + evsel->core.attr.sample_period = 1; + evsel->needs_auxtrace_mmap = true; + rvtrace_evsel = evsel; + opts->full_auxtrace = true; + } + } + + err = 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 = parse_event(evlist, "dummy:u"); + if (err) + return err; + + tracking_evsel = evlist__last(evlist); + evlist__set_tracking_event(evlist, tracking_evsel); + + tracking_evsel->core.attr.freq = 0; + tracking_evsel->core.attr.sample_period = 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 = + container_of(itr, struct rvtrace_recording, itr); + + free(ptr); +} + +static struct auxtrace_record *rvtrace_recording_init(int *err, struct perf_pmu *rvtrace_pmu) +{ + struct rvtrace_recording *ptr; + + if (!rvtrace_pmu) { + *err = -ENODEV; + return NULL; + } + + ptr = zalloc(sizeof(*ptr)); + if (!ptr) { + *err = -ENOMEM; + return NULL; + } + + ptr->rvtrace_pmu = rvtrace_pmu; + ptr->itr.recording_options = rvtrace_recording_options; + ptr->itr.info_priv_size = rvtrace_info_priv_size; + ptr->itr.info_fill = rvtrace_info_fill; + ptr->itr.free = rvtrace_recording_free; + ptr->itr.reference = rvtrace_reference; + ptr->itr.read_finish = auxtrace_record__read_finish; + ptr->itr.alignment = 0; + + *err = 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 = 0; i < pmu_nr; i++) { + if (evsel->core.attr.type == pmus[i]->type) + return pmus[i]; + } + + return NULL; +} + +struct auxtrace_record *auxtrace_record__init(struct evlist *evlist, int *err) +{ + struct perf_pmu *rvtrace_pmu = NULL; + struct perf_pmu *found_etm = NULL; + struct evsel *evsel; + + if (!evlist) + return NULL; + + rvtrace_pmu = perf_pmus__find(RVTRACE_PMU_NAME); + evlist__for_each_entry(evlist, evsel) { + if (rvtrace_pmu && !found_etm) + found_etm = find_pmu_for_event(&rvtrace_pmu, 1, evsel); + } + + if (found_etm) + return rvtrace_recording_init(err, rvtrace_pmu); + + *err = 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_session *session, case PERF_AUXTRACE_VPA_DTL: err = 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, }; 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 -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv