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coresight-etm4x: Read only access to the tracer's ID registers

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ETM ID registers contain valuable information about the capabilities
of the implementation and are very useful when configuring the device for
various trace scenarios.

Signed-off-by: Mathieu Poirier <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Mathieu Poirier 2015-05-13 10:34:21 -06:00 • committed by Greg Kroah-Hartman
commit 5625988e1e
2 changed files with 127 additions and 0 deletions
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37
drivers/hwtracing/coresight/coresight-etm4x.c
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@ -2238,6 +2238,37 @@ static struct attribute *coresight_etmv4_mgmt_attrs[] = {
NULL,
};
coresight_simple_func(trcidr0, TRCIDR0);
coresight_simple_func(trcidr1, TRCIDR1);
coresight_simple_func(trcidr2, TRCIDR2);
coresight_simple_func(trcidr3, TRCIDR3);
coresight_simple_func(trcidr4, TRCIDR4);
coresight_simple_func(trcidr5, TRCIDR5);
/* trcidr[6,7] are reserved */
coresight_simple_func(trcidr8, TRCIDR8);
coresight_simple_func(trcidr9, TRCIDR9);
coresight_simple_func(trcidr10, TRCIDR10);
coresight_simple_func(trcidr11, TRCIDR11);
coresight_simple_func(trcidr12, TRCIDR12);
coresight_simple_func(trcidr13, TRCIDR13);
static struct attribute *coresight_etmv4_trcidr_attrs[] = {
&dev_attr_trcidr0.attr,
&dev_attr_trcidr1.attr,
&dev_attr_trcidr2.attr,
&dev_attr_trcidr3.attr,
&dev_attr_trcidr4.attr,
&dev_attr_trcidr5.attr,
/* trcidr[6,7] are reserved */
&dev_attr_trcidr8.attr,
&dev_attr_trcidr9.attr,
&dev_attr_trcidr10.attr,
&dev_attr_trcidr11.attr,
&dev_attr_trcidr12.attr,
&dev_attr_trcidr13.attr,
NULL,
};
static const struct attribute_group coresight_etmv4_group = {
.attrs = coresight_etmv4_attrs,
};
@ -2247,9 +2278,15 @@ static const struct attribute_group coresight_etmv4_mgmt_group = {
.name = "mgmt",
};
static const struct attribute_group coresight_etmv4_trcidr_group = {
.attrs = coresight_etmv4_trcidr_attrs,
.name = "trcidr",
};
static const struct attribute_group *coresight_etmv4_groups[] = {
&coresight_etmv4_group,
&coresight_etmv4_mgmt_group,
&coresight_etmv4_trcidr_group,
NULL,
};