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| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2016-05-03 19:33:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-03 23:59:30 +0200 |
| commit | 8e996a2874bbbed30e8dfe881453825fc6b7654e (patch) | |
| tree | 3dd50be8cc4462eba2b1a87dc682258cfd986043 /Documentation/ABI/testing/sysfs-class-stm | |
| parent | coresight: etm4x: modify q_support type (diff) | |
| download | linux-8e996a2874bbbed30e8dfe881453825fc6b7654e.tar.xz linux-8e996a2874bbbed30e8dfe881453825fc6b7654e.zip | |
stm class: Support devices that override software assigned masters
Some STM devices adjust software assigned master numbers depending on
the trace source and its runtime state and whatnot. This patch adds
a sysfs attribute to inform the trace-side software that master numbers
assigned to software sources will not match those in the STP stream,
so that, for example, master/channel allocation policy can be adjusted
accordingly.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-stm')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-stm | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-stm b/Documentation/ABI/testing/sysfs-class-stm index c9aa4f3fc9a7..77ed3da0f68e 100644 --- a/Documentation/ABI/testing/sysfs-class-stm +++ b/Documentation/ABI/testing/sysfs-class-stm @@ -12,3 +12,13 @@ KernelVersion: 4.3 Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> Description: Shows the number of channels per master on this STM device. + +What: /sys/class/stm/<stm>/hw_override +Date: March 2016 +KernelVersion: 4.7 +Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> +Description: + Reads as 0 if master numbers in the STP stream produced by + this stm device will match the master numbers assigned by + the software or 1 if the stm hardware overrides software + assigned masters. |