| Message ID | 20201214173731.302520-19-suzuki.poulose@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | coresight: etm4x: Support for system instructions | expand |
Hi Suzuki On Mon, 14 Dec 2020 at 17:38, Suzuki K Poulose <suzuki.poulose@arm.com> wrote: > > Expose the TRCDEVARCH register via the sysfs for component > detection. Given that the TRCIDR1 may not completely identify > the ETM component and instead need to use TRCDEVARCH, expose > this via sysfs for tools to use it for identification. > > Cc: Mike Leach <mike.leach@linaro.org> > Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> > Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> > --- > drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c > index 009818675928..277fd5bff811 100644 > --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c > +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c > @@ -2395,6 +2395,7 @@ coresight_etm4x_cross_read(trcidr10, TRCIDR10); > coresight_etm4x_cross_read(trcidr11, TRCIDR11); > coresight_etm4x_cross_read(trcidr12, TRCIDR12); > coresight_etm4x_cross_read(trcidr13, TRCIDR13); > +coresight_etm4x_cross_read(trcdevarch, TRCDEVARCH); > > static struct attribute *coresight_etmv4_trcidr_attrs[] = { > &dev_attr_trcidr0.attr, > @@ -2410,6 +2411,7 @@ static struct attribute *coresight_etmv4_trcidr_attrs[] = { > &dev_attr_trcidr11.attr, > &dev_attr_trcidr12.attr, > &dev_attr_trcidr13.attr, > + &dev_attr_trcdevarch.attr, > NULL, > }; > It makes far more sense for this to appear in the 'mgmt' group, per the grouping in the Coresight spec. This would place it alongside the other CoreSight management registers, including DEVID, and DEVTYPE which is used with DEVARCH in the CoreSight UCI, . This is also consistent with the CTI which places all three of these registers in the 'mgmt' section. Regards Mike > -- > 2.24.1 >
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index 009818675928..277fd5bff811 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -2395,6 +2395,7 @@ coresight_etm4x_cross_read(trcidr10, TRCIDR10); coresight_etm4x_cross_read(trcidr11, TRCIDR11); coresight_etm4x_cross_read(trcidr12, TRCIDR12); coresight_etm4x_cross_read(trcidr13, TRCIDR13); +coresight_etm4x_cross_read(trcdevarch, TRCDEVARCH); static struct attribute *coresight_etmv4_trcidr_attrs[] = { &dev_attr_trcidr0.attr, @@ -2410,6 +2411,7 @@ static struct attribute *coresight_etmv4_trcidr_attrs[] = { &dev_attr_trcidr11.attr, &dev_attr_trcidr12.attr, &dev_attr_trcidr13.attr, + &dev_attr_trcdevarch.attr, NULL, };