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authorSuzuki K Poulose <suzuki.poulose@arm.com>2021-02-01 11:13:42 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-02-04 17:00:33 +0100
commit4211bfce1eb9962f2ae1972837c032ad6d48f292 (patch)
tree4c3f24401612befcbe044b331ac60fcd15b835d8 /Documentation/ABI
parent8b94db1edaee7b6cf8f39d2ea600258a74351404 (diff)
downloadlinux-4211bfce1eb9962f2ae1972837c032ad6d48f292.tar.bz2
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>
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x8
1 files changed, 8 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