en Copyright 2015 Java http://172.16.0.5:8080/history/linux-6.15/drivers/hwtracing/ptt/Makefile#ff0de066 hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace deviceHiSilicon PCIe tune and trace device(PTT) is a PCIe Root Complex integratedEndpoint(RCiEP) device, providing the capability to dynamically monitor andtune the PCIe traffic and trace the TLP headers.Add the driver for the device to enable the trace function. Register PMUdevice of PTT trace, then users can use trace through perf command. Thedriver makes use of perf AUX trace function and support the followingevents to configure the trace:- filter: select Root port or Endpoint to trace- type: select the type of traced TLP headers- direction: select the direction of traced TLP headers- format: select the data format of the traced TLP headersThis patch initially add basic trace support of PTT device.Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>Reviewed-by: John Garry <john.garry@huawei.com>Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>Link: https://lore.kernel.org/r/20220816114414.4092-3-yangyicong@huawei.comSigned-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> List of files: /linux-6.15/drivers/hwtracing/ptt/Makefile Tue, 16 Aug 2022 11:44:11 +0000 Yicong Yang <yangyicong@hisilicon.com>