renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-22 04:24:02 +08:00
Code

coresight: tmc-etr: Handle memory errors

Browse Source 
We have so far ignored the memory errors, assuming that we have perfect
hardware and driver. Let us handle the memory errors reported by the
TMC ETR in status and truncate the buffer.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
[Removed ASCII smiley face from changelog]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20190829202842.580-6-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Suzuki K Poulose 2019-08-29 14:28:30 -06:00 committed by Greg Kroah-Hartman
parent 5774a34fc8
commit f52ff9b7d6
2 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/hwtracing/coresight/coresight-tmc-etr.c
View File

@ -928,6 +928,19 @@ static void tmc_sync_etr_buf(struct tmc_drvdata *drvdata)
rrp = tmc_read_rrp(drvdata);
rwp = tmc_read_rwp(drvdata);
status = readl_relaxed(drvdata->base + TMC_STS);
/*
* If there were memory errors in the session, truncate the
* buffer.
*/
if (WARN_ON_ONCE(status & TMC_STS_MEMERR)) {
dev_dbg(&drvdata->csdev->dev,
"tmc memory error detected, truncating buffer\n");
etr_buf->len = 0;
etr_buf->full = 0;
return;
}
etr_buf->full = status & TMC_STS_FULL;
WARN_ON(!etr_buf->ops || !etr_buf->ops->sync);

1
drivers/hwtracing/coresight/coresight-tmc.h
View File

@ -47,6 +47,7 @@
#define TMC_STS_TMCREADY_BIT 2
#define TMC_STS_FULL BIT(0)
#define TMC_STS_TRIGGERED BIT(1)
#define TMC_STS_MEMERR BIT(5)
/*
* TMC_AXICTL - 0x110
*