I'll add a +1 in interest for MCTP.

Performance would be better if this is moved to the kernel, but I'm a bit curious about any other pros and cons of working in userspace.

One of our most immediate use cases for MCTP would be in a UEFI BIOS before a Redfish client can be bootstrapped. Would things be more portable for BIOS vendors if this is done in userspace. I genuinely don't know enough about that area to know which is more flexible.

-Richard

On Thu, Jan 9, 2020 at 10:18 AM Vijay Khemka <vijaykhemka@fb.com> wrote:

This will be much better if implemented in kernel.

-Vijay
On 1/8/20, 5:55 PM, "Andrew Jeffery" <andrew@aj.id.au> wrote:

On Sat, 21 Dec 2019, at 10:45, Khetan, Sharad wrote:
> Hi Andrew,
> Sorry for late response.
> The plan is to have MCTP in user space.
>

How are you handling this then? mmap()'ing the BAR from sysfs?

I plan to get back to implementing in-kernel socket-based MCTP shortly.
Unfortunately it slipped back a little in my priority list late last year. I'd be
interested in your feedback on the proposal when I get something written
down.

Andrew