Re: [PATCH 00/11] Linux RISC-V trace framework and drivers

[Greg KH]

On Thu, Oct 02, 2025 at 11:37:21AM +0530, Anup Patel wrote:
> This series adds initial support for RISC-V trace framework and drivers.
> The RISC-V trace v1.0 specification is already ratified and can be found at:
> https://github.com/riscv-non-isa/e-trace-encap/releases/tag/v1.0.0-ratified
> https://github.com/riscv-non-isa/tg-nexus-trace/releases/tag/1.0_Ratified
> 
> The RISC-V trace framework and drivers are designed to be agnostic to the
> underlying trace protocol hence both RISC-V E-trace and RISC-V N-trace should
> work fine. The discovery of trace protocl parameters are left to user-space
> trace decoder.
> 
> In ther future, there will be subsequent series adding:
> 1) Sysfs support

why does "trace" need sysfs support?  No other cpu platform uses that
today, so why is a new user/kernel api needed?

thanks,

greg k-h