Re: [PATCH 0/4] Add support for HiSilicon PCIe Tune and Trace device

[Greg KH]

On Tue, Apr 06, 2021 at 08:45:50PM +0800, Yicong Yang wrote:
> HiSilicon PCIe tune and trace device(PTT) is a PCIe Root Complex
> integrated Endpoint(RCiEP) device, providing the capability
> to dynamically monitor and tune the PCIe traffic(tune),
> and trace the TLP headers(trace). The driver exposes the user
> interface through debugfs, so no need for extra user space tools.
> The usage is described in the document.

Why use debugfs and not the existing perf tools for debugging?

thanks,

greg k-h