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coresight: etm4x: adding config and traceid registers

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Adding new sysFS management interface to query the configuration
and the traceid registers.  Both are required to convey information
to the perf cmd line tools when using ETMv4 tracers as PMU.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2016-04-05 11:53:43 -06:00 committed by Greg Kroah-Hartman
parent a77de2637c
commit 7c38aa4b03
2 changed files with 17 additions and 0 deletions
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13
Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x
View file

@ -359,6 +359,19 @@ Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the Peripheral ID3 Register
(0xFEC). The value is taken directly from the HW.
What: /sys/bus/coresight/devices/<memory_map>.etm/mgmt/trcconfig
Date: February 2016
KernelVersion: 4.07
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the trace configuration register
(0x010) as currently set by SW.
What: /sys/bus/coresight/devices/<memory_map>.etm/mgmt/trctraceid
Date: February 2016
KernelVersion: 4.07
Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
Description: (R) Print the content of the trace ID register (0x040).
What: /sys/bus/coresight/devices/<memory_map>.etm/trcidr/trcidr0
Date: April 2015
KernelVersion: 4.01

4
drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
View file

@ -1972,6 +1972,8 @@ coresight_simple_func(trcoslsr, TRCOSLSR);
coresight_simple_func(trcpdcr, TRCPDCR);
coresight_simple_func(trcpdsr, TRCPDSR);
coresight_simple_func(trclsr, TRCLSR);
coresight_simple_func(trcconfig, TRCCONFIGR);
coresight_simple_func(trctraceid, TRCTRACEIDR);
coresight_simple_func(trcauthstatus, TRCAUTHSTATUS);
coresight_simple_func(trcdevid, TRCDEVID);
coresight_simple_func(trcdevtype, TRCDEVTYPE);
@ -1985,6 +1987,8 @@ static struct attribute *coresight_etmv4_mgmt_attrs[] = {
&dev_attr_trcpdcr.attr,
&dev_attr_trcpdsr.attr,
&dev_attr_trclsr.attr,
&dev_attr_trcconfig.attr,
&dev_attr_trctraceid.attr,
&dev_attr_trcauthstatus.attr,
&dev_attr_trcdevid.attr,
&dev_attr_trcdevtype.attr,