[PATCH 03/24] gtrace: Drop trace format field and helper function
From: Zane Leung
Date: Thu Oct 22 2026 - 23:16:53 EST
Remove the format field from struct gtrace_platform_data and drop
the associated gtrace_path_aux_format() helper function.
Signed-off-by: Zane Leung <liangzhen@xxxxxxxxxxxxxxxxxx>
---
drivers/hwtracing/gtrace/gtrace-perf.c | 15 --------
drivers/hwtracing/gtrace/rvtrace-encoder.c | 39 ---------------------
drivers/hwtracing/gtrace/rvtrace-platform.c | 3 +-
drivers/hwtracing/gtrace/rvtrace-ramsink.c | 1 -
include/linux/gtrace.h | 3 --
5 files changed, 1 insertion(+), 60 deletions(-)
diff --git a/drivers/hwtracing/gtrace/gtrace-perf.c b/drivers/hwtracing/gtrace/gtrace-perf.c
index 928f0405c6c1..56713c8ee850 100644
--- a/drivers/hwtracing/gtrace/gtrace-perf.c
+++ b/drivers/hwtracing/gtrace/gtrace-perf.c
@@ -167,20 +167,6 @@ static void *gtrace_setup_aux(struct perf_event *event, void **pages,
return NULL;
}
-static u64 gtrace_path_aux_format(struct gtrace_path *path)
-{
- struct gtrace_component *src = gtrace_path_source(path);
-
- switch (src->pdata->format) {
- case GTRACE_FORMAT_ETRACE:
- return PERF_AUX_FLAG_GTRACE_FORMAT_ETRACE;
- case GTRACE_FORMAT_NTRACE:
- return PERF_AUX_FLAG_GTRACE_FORMAT_NTRACE;
- default:
- return PERF_AUX_FLAG_GTRACE_FORMAT_UNKNOWN;
- }
-}
-
static void gtrace_event_read(struct perf_event *event)
{
}
@@ -295,7 +281,6 @@ static void gtrace_event_stop(struct perf_event *event, int mode)
return;
ret = gtrace_path_copyto_auxbuf(path, &event_data->buf, &size, &format);
WARN_ON_ONCE(ret);
- format = gtrace_path_aux_format(path);
if (READ_ONCE(handle->event)) {
/* Tag the AUX data with the source's trace format. */
perf_aux_output_flag(handle, format);
diff --git a/drivers/hwtracing/gtrace/rvtrace-encoder.c b/drivers/hwtracing/gtrace/rvtrace-encoder.c
index 1f06b1a2b412..f24780b1ca1e 100644
--- a/drivers/hwtracing/gtrace/rvtrace-encoder.c
+++ b/drivers/hwtracing/gtrace/rvtrace-encoder.c
@@ -53,38 +53,11 @@ static void rvtrace_encoder_set_srcid(struct gtrace_platform_data *pdata, u32 sr
gtrace_write32(pdata, val, RVTRACE_COMPONENT_CTRL_OFFSET);
}
-/* Set requested trace format and return 0 if hardware supports that format */
-static int rvtrace_encoder_set_format(struct gtrace_platform_data *pdata)
-{
- u32 val, fmt;
-
- switch (pdata->format) {
- case GTRACE_FORMAT_ETRACE:
- fmt = RVTRACE_COMPONENT_CTRL_FORMAT_ETRACE;
- break;
- case GTRACE_FORMAT_NTRACE:
- fmt = RVTRACE_COMPONENT_CTRL_FORMAT_NTRACE;
- break;
- default:
- return -EINVAL;
- }
-
- val = gtrace_read32(pdata, RVTRACE_COMPONENT_CTRL_OFFSET);
- val &= ~(RVTRACE_COMPONENT_CTRL_FORMAT_MASK << RVTRACE_COMPONENT_CTRL_FORMAT_SHIFT);
- val |= fmt << RVTRACE_COMPONENT_CTRL_FORMAT_SHIFT;
- gtrace_write32(pdata, val, RVTRACE_COMPONENT_CTRL_OFFSET);
-
- val = gtrace_read32(pdata, RVTRACE_COMPONENT_CTRL_OFFSET);
- val = (val >> RVTRACE_COMPONENT_CTRL_FORMAT_SHIFT) & RVTRACE_COMPONENT_CTRL_FORMAT_MASK;
- return val == fmt ? 0 : -EOPNOTSUPP;
-}
-
static int rvtrace_encoder_probe(struct gtrace_component *comp)
{
struct gtrace_platform_data *pdata = comp->pdata;
struct rvtrace_encoder_priv *priv;
u32 val, hw_srcbits, srcbits;
- int ret;
if (pdata->bound_cpu < 0) {
dev_err(&comp->dev, "cpu property missing. Please fix firmware.\n");
@@ -95,12 +68,6 @@ static int rvtrace_encoder_probe(struct gtrace_component *comp)
if (!priv)
return -ENOMEM;
- ret = rvtrace_encoder_set_format(pdata);
- if (ret) {
- dev_err(&comp->dev, "failed to set format %d\n", pdata->format);
- return ret;
- }
-
/* Check if trTeInhibitSrc is hardwired to 1 */
val = gtrace_read32(pdata, RVTRACE_COMPONENT_CTRL_OFFSET);
val &= ~BIT(RVTRACE_COMPONENT_CTRL_INHIBITSRC_SHIFT);
@@ -144,12 +111,6 @@ static int rvtrace_encoder_start(struct gtrace_component *comp)
if (priv->srcbits)
rvtrace_encoder_set_srcid(pdata, priv->srcbits);
- ret = rvtrace_encoder_set_format(pdata);
- if (ret) {
- dev_err(&comp->dev, "failed to set format %d\n", pdata->format);
- return ret;
- }
-
ret = gtrace_enable_component(comp);
if (ret) {
dev_err(&comp->dev, "failed to enable encoder.\n");
diff --git a/drivers/hwtracing/gtrace/rvtrace-platform.c b/drivers/hwtracing/gtrace/rvtrace-platform.c
index 189ff0b8bc18..e5c1f47388a2 100644
--- a/drivers/hwtracing/gtrace/rvtrace-platform.c
+++ b/drivers/hwtracing/gtrace/rvtrace-platform.c
@@ -78,7 +78,6 @@ static int rvtrace_platform_probe(struct platform_device *pdev)
pdata->dev = dev;
pdata->impid = RVTRACE_COMPONENT_IMPID_UNKNOWN;
pdata->hw_ops = &rvtrace_hw_ops;
- pdata->format = (uintptr_t)device_get_match_data(dev);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
@@ -146,7 +145,7 @@ static void rvtrace_platform_remove(struct platform_device *pdev)
}
static const struct of_device_id rvtrace_platform_match[] = {
- { .compatible = "riscv,trace-component", .data = (void *)GTRACE_FORMAT_ETRACE },
+ { .compatible = "riscv,trace-component" },
{}
};
diff --git a/drivers/hwtracing/gtrace/rvtrace-ramsink.c b/drivers/hwtracing/gtrace/rvtrace-ramsink.c
index 67b6779aacee..9588c32c5b13 100644
--- a/drivers/hwtracing/gtrace/rvtrace-ramsink.c
+++ b/drivers/hwtracing/gtrace/rvtrace-ramsink.c
@@ -161,7 +161,6 @@ static size_t rvtrace_ramsink_copyto_auxbuf(struct gtrace_component *comp,
dst.cur = buf->pos;
src.base = priv->va;
src.len = priv->size;
- *format = PERF_AUX_FLAG_GTRACE_FORMAT_ETRACE;
wp = rvtrace_ramsink_read_pair(comp->pdata, RVTRACE_RAMSINK_WPLOW_OFF);
wrap = wp & RVTRACE_RAMSINK_WPLOW_WRAP;
wp &= ~RVTRACE_RAMSINK_WPLOW_WRAP;
diff --git a/include/linux/gtrace.h b/include/linux/gtrace.h
index 9945303d2713..0a017f1f888d 100644
--- a/include/linux/gtrace.h
+++ b/include/linux/gtrace.h
@@ -96,7 +96,6 @@ struct gtrace_hw_ops {
* @bound_cpu: CPU to which the component is bound, or -1 if unbound. For a
* source component bound to a CPU this must not be -1.
* @control_poll_timeout_usecs: Delay in usecs when polling control bits.
- * @format: Trace format selected by the platform driver.
* @nr_inconns: Number of input connections.
* @inconns: Array of pointers to input connections.
* @nr_outconns: Number of output connections.
@@ -128,8 +127,6 @@ struct gtrace_platform_data {
/* Delay in microseconds when polling control register bits */
int control_poll_timeout_usecs;
- enum gtrace_format format;
-
/*
* Platform driver must only populate empty pointer array without
* any actual input connections.
--
2.34.1