From c34cc23f1dcb77c66b5cd074f83dee61bfcbe567 Mon Sep 17 00:00:00 2001 From: Suzuki K Poulose Date: Wed, 11 Jul 2018 13:40:24 -0600 Subject: 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 Signed-off-by: Suzuki K Poulose Acked-by: Rob Herring Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'Documentation/ABI') 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 Description: (R) Indicates the capabilities of the Coresight TMC. The value is read directly from the DEVID register, 0xFC8, + +What: /sys/bus/coresight/devices/.tmc/buffer_size +Date: December 2018 +KernelVersion: 4.19 +Contact: Mathieu Poirier +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. -- cgit v1.2.3