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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2018-07-11 13:40:24 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-15 13:52:57 +0200 |
| commit | c34cc23f1dcb77c66b5cd074f83dee61bfcbe567 (patch) | |
| tree | 2e8a321ad3870577ee129a0c4fe4332335a8655c /Documentation/ABI | |
| parent | e8e3b771395d9b75ba5da409b7d20435ddb05a21 (diff) | |
| download | linux-c34cc23f1dcb77c66b5cd074f83dee61bfcbe567.tar.gz linux-c34cc23f1dcb77c66b5cd074f83dee61bfcbe567.tar.bz2 linux-c34cc23f1dcb77c66b5cd074f83dee61bfcbe567.zip | |
coresight: tmc: Add configuration support for trace buffer size
Now that we can dynamically switch between contiguous memory and
SG table depending on the trace buffer size, provide the support
for selecting an appropriate buffer size.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mathieu Poirier <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-tmc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc index 4fe677ed1305..ab49b9ac3bcb 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc @@ -83,3 +83,11 @@ KernelVersion: 4.7 Contact: Mathieu Poirier <mathieu.poirier@linaro.org> Description: (R) Indicates the capabilities of the Coresight TMC. The value is read directly from the DEVID register, 0xFC8, + +What: /sys/bus/coresight/devices/<memory_map>.tmc/buffer_size +Date: December 2018 +KernelVersion: 4.19 +Contact: Mathieu Poirier <mathieu.poirier@linaro.org> +Description: (RW) Size of the trace buffer for TMC-ETR when used in SYSFS + mode. Writable only for TMC-ETR configurations. The value + should be aligned to the kernel pagesize. |