Re: [PATCH RFC 0/3] riscv: Add DMA_COHERENT support

Christoph Hellwig
2021-05-19T06:57:02Z

On Tue, May 18, 2021 at 11:54:31PM -0700, Drew Fustini wrote:
> Isn't it a good goal for Linux to support the capabilities present in
> the SoC that a currently being fab'd?
>
> I believe the CMO group only started last year [1] so the RV64GC SoCs
> that are going into mass production this year would not have had the
> opporuntiy of utilizing any RISC-V ISA extension for handling cache
> management.

Then the vendors need to push harder. This problem has been known
for years but ignored by the vendors.