Hi Jason,
Thank you for replying.

2021年12月8日(水) 2:14 Jason Gunthorpe [off-list ref]:

On Fri, Dec 03, 2021 at 12:51:44PM +0900, Shunsuke Mie wrote:

quoted

Hi maintainers,

Could you please review this patch series?

Why is it RFC?

I'm confused why this is useful?

This can't do copy from MMIO memory, so it shouldn't be compatible
with things like Gaudi - does something prevent this?

I think if an export of the dma-buf supports vmap, CPU is able to access the
mmio memory.

Is it wrong? If this is wrong, there is no advantages this changes..

Jason

Regards,
Shunsuke