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authorSuzuki K Poulose <suzuki.poulose@arm.com>2018-07-11 13:40:24 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-07-15 13:52:57 +0200
commitc34cc23f1dcb77c66b5cd074f83dee61bfcbe567 (patch)
tree2e8a321ad3870577ee129a0c4fe4332335a8655c /Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc
parente8e3b771395d9b75ba5da409b7d20435ddb05a21 (diff)
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/testing/sysfs-bus-coresight-devices-tmc')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc8
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.