This is a note to let you know that I've just added the patch titled
coresight: etm4x: Set skip_power_up in etm4_init_arch_data function
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
coresight-etm4x-set-skip_power_up-in-etm4_init_arch_.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ebc9a2386bb629dca0894b07d6ba27761b648d95
Author: Mao Jinlong <quic_jinlmao@xxxxxxxxxxx>
Date: Wed Jan 31 02:54:19 2024 -0800
coresight: etm4x: Set skip_power_up in etm4_init_arch_data function
[ Upstream commit 1bbe0a247e5d72f723daeecf41596bfa99e199f1 ]
skip_power_up is used in etm4_init_arch_data when set lpoverride. So
need to set the value of it before calling using it.
Fixes: 5214b563588e ("coresight: etm4x: Add support for sysreg only devices")
Signed-off-by: Mao Jinlong <quic_jinlmao@xxxxxxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Link: https://lore.kernel.org/r/20240131105423.9519-1-quic_jinlmao@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index 26d0d4485ae99..35c19c2542cf1 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -1022,6 +1022,7 @@ static void etm4_init_arch_data(void *info)
struct etm4_init_arg *init_arg = info;
struct etmv4_drvdata *drvdata;
struct csdev_access *csa;
+ struct device *dev = init_arg->dev;
int i;
drvdata = init_arg->drvdata;
@@ -1035,6 +1036,10 @@ static void etm4_init_arch_data(void *info)
if (!etm4_init_csdev_access(drvdata, csa))
return;
+ if (!csa->io_mem ||
+ fwnode_property_present(dev_fwnode(dev), "qcom,skip-power-up"))
+ drvdata->skip_power_up = true;
+
/* Detect the support for OS Lock before we actually use it */
etm_detect_os_lock(drvdata, csa);
@@ -1921,11 +1926,6 @@ static int etm4_probe(struct device *dev, void __iomem *base, u32 etm_pid)
if (!drvdata->arch)
return -EINVAL;
- /* TRCPDCR is not accessible with system instructions. */
- if (!desc.access.io_mem ||
- fwnode_property_present(dev_fwnode(dev), "qcom,skip-power-up"))
- drvdata->skip_power_up = true;
-
major = ETM_ARCH_MAJOR_VERSION(drvdata->arch);
minor = ETM_ARCH_MINOR_VERSION(drvdata->arch);
