Re: [PATCH rdma-next 04/15] RDMA/core: Allow optional access flags in reg mr ioctl

From: Jason Gunthorpe

Date: Tue Aug 11 2026 - 15:33:46 EST


On Sun, 26 Jul 2026 12:29:18 +0300, Michael Gur <michaelgur@xxxxxxxxxx> wrote:
> The uverbs ABI reserves the optional access flags range as best-effort:
> drivers should accept any flag in this range and treat the actual support
> as opportunistic, never failing registration when an optional flag is
> requested.
>
> Add the optional access flag to the allow-list of dmabuf registration
> through the reg_mr ioctl. Uverbs users can now request any optional access
> flag on dmabuf registrations and mlx5 will apply the flag's effect on a
> best-effort basis when supported.
>
> [...]

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>

--
Jason