From: Anup Patel <apatel@ventanamicro.com>
To: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Greg KH <gregkh@linuxfoundation.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Ian Rogers <irogers@google.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Namhyung Kim <namhyung@kernel.org>,
Mark Rutland <mark.rutland@arm.com>, Jiri Olsa <jolsa@kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Liang Kan <kan.liang@linux.intel.com>,
Mayuresh Chitale <mchitale@gmail.com>,
Anup Patel <anup@brainfault.org>,
Atish Patra <atish.patra@linux.dev>,
Andrew Jones <ajones@ventanamicro.com>,
Sunil V L <sunilvl@ventanamicro.com>,
linux-riscv@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Mayuresh Chitale <mchitale@ventanamicro.com>,
Anup Patel <apatel@ventanamicro.com>
Subject: [PATCH v2 11/12] perf tools: Initial support for RISC-V trace decoder
Date: Sat, 1 Nov 2025 21:12:44 +0530 [thread overview]
Message-ID: <20251101154245.162492-12-apatel@ventanamicro.com> (raw)
In-Reply-To: <20251101154245.162492-1-apatel@ventanamicro.com>
From: Mayuresh Chitale <mchitale@ventanamicro.com>
Add bare bones support for RISC-V trace decoder so that the data received
from the hardware by the RISC-V trace perf driver can be written to the
perf record output file.
Co-developed-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
---
tools/perf/util/Build | 1 +
tools/perf/util/auxtrace.c | 3 +
tools/perf/util/rvtrace-decoder.c | 91 +++++++++++++++++++++++++++++++
tools/perf/util/rvtrace.h | 2 +
4 files changed, 97 insertions(+)
create mode 100644 tools/perf/util/rvtrace-decoder.c
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 4be313cd115a..f736cea51fd8 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -145,6 +145,7 @@ perf-util-$(CONFIG_AUXTRACE) += cs-etm.o
perf-util-$(CONFIG_AUXTRACE) += cs-etm-decoder/
endif
perf-util-$(CONFIG_AUXTRACE) += cs-etm-base.o
+perf-util-$(CONFIG_AUXTRACE) += rvtrace-decoder.o
perf-util-y += parse-branch-options.o
perf-util-y += dump-insn.o
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index c905563e0d8a..299991d5d305 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -54,6 +54,7 @@
#include "arm-spe.h"
#include "hisi-ptt.h"
#include "s390-cpumsf.h"
+#include "rvtrace.h"
#include "util/mmap.h"
#include "powerpc-vpadtl.h"
@@ -1395,6 +1396,8 @@ int perf_event__process_auxtrace_info(struct perf_session *session,
err = powerpc_vpadtl_process_auxtrace_info(event, session);
break;
case PERF_AUXTRACE_RISCV_TRACE:
+ err = rvtrace__process_auxtrace_info(event, session);
+ break;
case PERF_AUXTRACE_UNKNOWN:
default:
return -EINVAL;
diff --git a/tools/perf/util/rvtrace-decoder.c b/tools/perf/util/rvtrace-decoder.c
new file mode 100644
index 000000000000..58db5ca62c1a
--- /dev/null
+++ b/tools/perf/util/rvtrace-decoder.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * RISC-V trace Decoder
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include "evlist.h"
+#include <internal/lib.h>
+#include "rvtrace.h"
+
+struct rvtrace_decoder {
+ struct auxtrace auxtrace;
+ u32 auxtrace_type;
+ struct perf_session *session;
+ struct machine *machine;
+ u32 pmu_type;
+};
+
+static int rvtrace_process_event(struct perf_session *session __maybe_unused,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ const struct perf_tool *tool __maybe_unused)
+{
+ return 0;
+}
+
+static int rvtrace_process_auxtrace_event(struct perf_session *session __maybe_unused,
+ union perf_event *event __maybe_unused,
+ const struct perf_tool *tool __maybe_unused)
+{
+ return 0;
+}
+
+static int rvtrace_flush(struct perf_session *session __maybe_unused,
+ const struct perf_tool *tool __maybe_unused)
+{
+ return 0;
+}
+
+static void rvtrace_free_events(struct perf_session *session __maybe_unused)
+{
+}
+
+static void rvtrace_free(struct perf_session *session)
+{
+ struct rvtrace_decoder *ptr = container_of(session->auxtrace, struct rvtrace_decoder,
+ auxtrace);
+
+ session->auxtrace = NULL;
+ free(ptr);
+}
+
+static bool rvtrace_evsel_is_auxtrace(struct perf_session *session,
+ struct evsel *evsel)
+{
+ struct rvtrace_decoder *ptr = container_of(session->auxtrace,
+ struct rvtrace_decoder, auxtrace);
+
+ return evsel->core.attr.type == ptr->pmu_type;
+}
+
+int rvtrace__process_auxtrace_info(union perf_event *event,
+ struct perf_session *session)
+{
+ struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info;
+ struct rvtrace_decoder *ptr;
+
+ if (auxtrace_info->header.size < RVTRACE_AUXTRACE_PRIV_SIZE +
+ sizeof(struct perf_record_auxtrace_info))
+ return -EINVAL;
+
+ ptr = zalloc(sizeof(*ptr));
+ if (!ptr)
+ return -ENOMEM;
+
+ ptr->session = session;
+ ptr->machine = &session->machines.host;
+ ptr->auxtrace_type = auxtrace_info->type;
+ ptr->pmu_type = auxtrace_info->priv[0];
+
+ ptr->auxtrace.process_event = rvtrace_process_event;
+ ptr->auxtrace.process_auxtrace_event = rvtrace_process_auxtrace_event;
+ ptr->auxtrace.flush_events = rvtrace_flush;
+ ptr->auxtrace.free_events = rvtrace_free_events;
+ ptr->auxtrace.free = rvtrace_free;
+ ptr->auxtrace.evsel_is_auxtrace = rvtrace_evsel_is_auxtrace;
+ session->auxtrace = &ptr->auxtrace;
+
+ return 0;
+}
diff --git a/tools/perf/util/rvtrace.h b/tools/perf/util/rvtrace.h
index 93c041db8660..fdf2e5866c85 100644
--- a/tools/perf/util/rvtrace.h
+++ b/tools/perf/util/rvtrace.h
@@ -15,4 +15,6 @@
#define RVTRACE_AUXTRACE_PRIV_SIZE sizeof(u64)
+int rvtrace__process_auxtrace_info(union perf_event *event, struct perf_session *session);
+struct auxtrace_record *rvtrace_record_init(int *err);
#endif
--
2.43.0
next prev parent reply other threads:[~2025-11-01 15:44 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-01 15:42 [PATCH v2 00/12] Linux RISC-V trace framework and drivers Anup Patel
2025-11-01 15:42 ` [PATCH v2 01/12] dt-bindings: Add RISC-V trace component bindings Anup Patel
2025-11-20 16:39 ` Rob Herring
2026-01-02 3:38 ` Anup Patel
2025-11-01 15:42 ` [PATCH v2 02/12] rvtrace: Initial implementation of driver framework Anup Patel
2025-11-21 7:49 ` Nutty.Liu
2025-12-02 10:41 ` Bo Gan
2025-11-01 15:42 ` [PATCH v2 03/12] rvtrace: Add functions to create/destroy a trace component path Anup Patel
2025-11-01 15:42 ` [PATCH v2 04/12] rvtrace: Add functions to start/stop tracing on a " Anup Patel
2025-11-01 15:42 ` [PATCH v2 05/12] rvtrace: Add trace encoder driver Anup Patel
2025-11-01 15:42 ` [PATCH v2 06/12] rvtrace: Add function to copy into perf AUX buffer Anup Patel
2025-11-01 15:42 ` [PATCH v2 07/12] rvtrace: Add trace ramsink driver Anup Patel
2025-11-30 7:45 ` Bo Gan
2025-12-02 11:47 ` Mayuresh Chitale
2025-12-03 1:10 ` Bo Gan
2025-12-06 17:59 ` Mayuresh Chitale
2025-11-01 15:42 ` [PATCH v2 08/12] riscv: Enable DMA_RESTRICTED_POOL in defconfig Anup Patel
2025-11-01 15:42 ` [PATCH v2 09/12] rvtrace: Add perf driver for tracing using perf tool Anup Patel
2025-11-01 15:42 ` [PATCH v2 10/12] perf tools: Add RISC-V trace PMU record capabilities Anup Patel
2025-11-21 8:09 ` Nutty.Liu
2026-01-02 3:52 ` Anup Patel
2025-11-01 15:42 ` Anup Patel [this message]
2025-11-01 15:42 ` [PATCH v2 12/12] MAINTAINERS: Add entry for RISC-V trace framework and drivers Anup Patel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20251101154245.162492-12-apatel@ventanamicro.com \
--to=apatel@ventanamicro.com \
--cc=adrian.hunter@intel.com \
--cc=ajones@ventanamicro.com \
--cc=alex@ghiti.fr \
--cc=alexander.shishkin@linux.intel.com \
--cc=anup@brainfault.org \
--cc=atish.patra@linux.dev \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=irogers@google.com \
--cc=jolsa@kernel.org \
--cc=kan.liang@linux.intel.com \
--cc=krzk+dt@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=mark.rutland@arm.com \
--cc=mchitale@gmail.com \
--cc=mchitale@ventanamicro.com \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=palmer@dabbelt.com \
--cc=paul.walmsley@sifive.com \
--cc=peterz@infradead.org \
--cc=robh@kernel.org \
--cc=sunilvl@ventanamicro.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).