[PATCH v2 05/11] coresight: etm4x: Improve usability of sysfs - include/exclude addr.
From: Mike Leach <hidden>
Date: 2019-08-29 21:33:37
Also in:
linux-arm-kernel
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
Setting include / exclude on a range had to be done by setting the bit in 'mode' before setting the range. However, setting this bit also had the effect of altering the current range as well. Changed to only set include / exclude setting of a range at the point of setting that range. Either use a 3rd input parameter as the include exclude value, or if not present use the current value of 'mode'. Do not change current range when 'mode' changes. Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Mike Leach <redacted> --- .../hwtracing/coresight/coresight-etm4x-sysfs.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
index 11730a194951..e4a9ce76ed33 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c@@ -297,8 +297,6 @@ static ssize_t mode_store(struct device *dev, spin_lock(&drvdata->spinlock); config->mode = val & ETMv4_MODE_ALL; - etm4_set_mode_exclude(drvdata, - config->mode & ETM_MODE_EXCLUDE ? true : false); if (drvdata->instrp0 == true) { /* start by clearing instruction P0 field */
@@ -972,8 +970,12 @@ static ssize_t addr_range_store(struct device *dev, unsigned long val1, val2; struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent); struct etmv4_config *config = &drvdata->config; + int elements, exclude; - if (sscanf(buf, "%lx %lx", &val1, &val2) != 2) + elements = sscanf(buf, "%lx %lx %x", &val1, &val2, &exclude); + + /* exclude is optional, but need at least two parameter */ + if (elements < 2) return -EINVAL; /* lower address comparator cannot have a higher address value */ if (val1 > val2)
@@ -1001,9 +1003,11 @@ static ssize_t addr_range_store(struct device *dev, /* * Program include or exclude control bits for vinst or vdata * whenever we change addr comparators to ETM_ADDR_TYPE_RANGE + * use supplied value, or default to bit set in 'mode' */ - etm4_set_mode_exclude(drvdata, - config->mode & ETM_MODE_EXCLUDE ? true : false); + if (elements != 3) + exclude = config->mode & ETM_MODE_EXCLUDE; + etm4_set_mode_exclude(drvdata, exclude ? true : false); spin_unlock(&drvdata->spinlock); return size;
--
2.17.1