diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2021-02-01 21:13:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-04 19:00:33 +0300 |
| commit | 4211bfce1eb9962f2ae1972837c032ad6d48f292 (patch) | |
| tree | 4c3f24401612befcbe044b331ac60fcd15b835d8 | |
| parent | 8b94db1edaee7b6cf8f39d2ea600258a74351404 (diff) | |
| download | linux-4211bfce1eb9962f2ae1972837c032ad6d48f292.tar.xz | |
coresight: etm4x: Expose trcdevarch via sysfs
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.
Link: https://lore.kernel.org/r/20210110224850.1880240-21-suzuki.poulose@arm.com
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210201181351.1475223-23-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x | 8 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index 881f0cd99ce4..8e53a32f8150 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -371,6 +371,14 @@ Contact: Mathieu Poirier <mathieu.poirier@linaro.org> Description: (Read) Print the content of the Device ID Register (0xFC8). The value is taken directly from the HW. +What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevarch +Date: January 2021 +KernelVersion: 5.12 +Contact: Mathieu Poirier <mathieu.poirier@linaro.org> +Description: (Read) Print the content of the Device Architecture Register + (offset 0xFBC). The value is taken directly read + from the HW. + What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevtype Date: April 2015 KernelVersion: 4.01 diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index 45aeeac2f50e..b646d53a3133 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -2442,6 +2442,7 @@ static struct attribute *coresight_etmv4_mgmt_attrs[] = { coresight_etm4x_reg(trcoslsr, TRCOSLSR), coresight_etm4x_reg(trcconfig, TRCCONFIGR), coresight_etm4x_reg(trctraceid, TRCTRACEIDR), + coresight_etm4x_reg(trcdevarch, TRCDEVARCH), NULL, }; |