From: Zane Leung <liangzhen@linux.spacemit.com>
To: gregkh@linuxfoundation.org, palmer@dabbelt.com, pjw@kernel.org,
alexander.shishkin@linux.intel.com, suzuki.poulose@arm.com,
mchitale@gmail.com, anup@brainfault.org, irogers@google.com
Cc: mike.leach@arm.com, james.clark@linaro.org, leo.yan@arm.com,
peterz@infradead.org, mingo@redhat.com, namhyung@kernel.org,
mark.rutland@arm.com, jolsa@kernel.org, adrian.hunter@intel.com,
alex@ghiti.fr, atish.patra@linux.dev,
andrew.jones@oss.qualcomm.com, sunilvl@oss.qualcomm.com,
liangzhen@linux.spacemit.com, zhuangqiubin@linux.spacemit.com,
coresight@lists.linaro.org, linux-riscv@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 05/24] gtrace: Introduce some PMU format attributes
Date: Fri, 23 Oct 2026 11:14:46 +0800 [thread overview]
Message-ID: <20261023031505.2020925-6-liangzhen@linux.spacemit.com> (raw)
In-Reply-To: <20261023031505.2020925-1-liangzhen@linux.spacemit.com>
Add new PMU format attributes to support timestamp, context, and
synchronization controls. This allows userspace tools like perf to
pass detailed hardware configurations down to the gtrace framework.
Signed-off-by: Zane Leung <liangzhen@linux.spacemit.com>
---
drivers/hwtracing/gtrace/gtrace-perf.c | 12 ++++++++++++
include/linux/gtrace.h | 7 +++++++
2 files changed, 19 insertions(+)
diff --git a/drivers/hwtracing/gtrace/gtrace-perf.c b/drivers/hwtracing/gtrace/gtrace-perf.c
index 56713c8ee850..703c12b95665 100644
--- a/drivers/hwtracing/gtrace/gtrace-perf.c
+++ b/drivers/hwtracing/gtrace/gtrace-perf.c
@@ -323,9 +323,21 @@ static void gtrace_event_del(struct perf_event *event, int mode)
}
PMU_FORMAT_ATTR(event, "config:0-0");
+PMU_FORMAT_ATTR(context, "config:1-1");
+PMU_FORMAT_ATTR(syncmode, "config:2-3");
+PMU_FORMAT_ATTR(syncmax, "config:4-7");
+PMU_FORMAT_ATTR(timestamp, "config:8-8");
+PMU_FORMAT_ATTR(tsmode, "config:9-11");
+PMU_FORMAT_ATTR(tsprescale, "config:12-13");
static struct attribute *gtrace_pmu_formats_attr[] = {
&format_attr_event.attr,
+ &format_attr_context.attr,
+ &format_attr_syncmode.attr,
+ &format_attr_syncmax.attr,
+ &format_attr_timestamp.attr,
+ &format_attr_tsmode.attr,
+ &format_attr_tsprescale.attr,
NULL,
};
diff --git a/include/linux/gtrace.h b/include/linux/gtrace.h
index 0a017f1f888d..76b1aa9cfe79 100644
--- a/include/linux/gtrace.h
+++ b/include/linux/gtrace.h
@@ -14,6 +14,13 @@
#include <linux/property.h>
#include <linux/types.h>
+#define GTRACE_PMU_ATTR_CFG_CONTEXT_SHIFT 1
+#define GTRACE_PMU_ATTR_CFG_SYNCMODE_MASK GENMASK(3, 2)
+#define GTRACE_PMU_ATTR_CFG_SYNCMAX_MASK GENMASK(7, 4)
+#define GTRACE_PMU_ATTR_CFG_TIMESTAMP_SHIFT 8
+#define GTRACE_PMU_ATTR_CFG_TSMODE_MASK GENMASK(11, 9)
+#define GTRACE_PMU_ATTR_CFG_TSPRESCALE_MASK GENMASK(13, 12)
+
extern struct mutex gtrace_mutex;
/*
--
2.34.1
next prev parent reply other threads:[~2026-10-23 3:16 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 3:14 [RFC PATCH 00/24] Add Linux RISC-V trace support via the gtrace framework Zane Leung
2026-10-23 3:14 ` [PATCH 01/24] gtrace: Move connection release into component unregister Zane Leung
2026-10-23 3:14 ` [PATCH 02/24] gtrace: Initial implementation of gtrace sysfs framework Zane Leung
2026-10-23 3:14 ` [PATCH 03/24] gtrace: Drop trace format field and helper function Zane Leung
2026-10-23 3:14 ` [PATCH 04/24] gtrace: Add RISC-V trace encoder sysfs support Zane Leung
2026-10-23 3:14 ` Zane Leung [this message]
2026-10-23 3:14 ` [PATCH 06/24] gtrace: Replace owner PID with perf_event pointer in gtrace_path Zane Leung
2026-10-23 3:14 ` [PATCH 07/24] gtrace: Parse RISC-V Trace encoder config from perf event Zane Leung
2026-10-23 3:14 ` [PATCH 08/24] gtrace: add perf symlink support for gtrace components Zane Leung
2026-10-23 3:14 ` [PATCH 09/24] gtrace: Add port-level start/stop driver callbacks Zane Leung
2026-10-23 3:14 ` [PATCH 10/24] gtrace: Add RISC-V trace funnel driver Zane Leung
2026-10-23 3:14 ` [PATCH 11/24] gtrace: Add RISC-V trace timestamp support Zane Leung
2026-10-23 3:14 ` [PATCH 12/24] gtrace: Add RISC-V trace ATB bridge driver Zane Leung
2026-10-23 3:14 ` [PATCH 13/24] gtrace: Add CoreSight platform core APIs Zane Leung
2026-10-23 3:14 ` [PATCH 14/24] gtrace: Add CoreSight funnel driver Zane Leung
2026-10-23 3:14 ` [PATCH 15/24] gtrace: Only copy AUX data from the path sink Zane Leung
2026-10-23 3:14 ` [PATCH 16/24] perf: Flag whether gtrace AUX data carries CoreSight framing Zane Leung
2026-10-23 3:14 ` [PATCH 17/24] gtrace: Unify default sink selection across CPUs in perf setup Zane Leung
2026-10-23 3:14 ` [PATCH 18/24] gtrace: Add sink-specific buffer alloc/free callbacks Zane Leung
2026-10-23 3:15 ` [PATCH 19/24] gtrace: Add setup_sysfs_buf callback to setup sysfs sink buffer Zane Leung
2026-10-23 3:15 ` [PATCH 20/24] gtrace: Add CoreSight TMC driver support Zane Leung
2026-10-23 3:15 ` [PATCH 21/24] perf tools: riscv: making gtrace PMU listable Zane Leung
2026-10-23 3:15 ` [PATCH 22/24] perf tools: Add Nexus RISC-V Trace decoder Zane Leung
2026-10-23 3:15 ` [PATCH 23/24] perf tools: gtrace: Record and parse trace encoder metadata Zane Leung
2026-10-23 3:15 ` [PATCH 24/24] perf tools: gtrace: Add AUX trace decoder and branch sample synthesis Zane Leung
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