MCTP over PCI on AST2500

Richard Hanley rhanley at
Fri Jan 10 07:45:32 AEDT 2020

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.


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

> This will be much better if implemented in kernel.
> -Vijay
> On 1/8/20, 5:55 PM, "Andrew Jeffery" <andrew at> 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
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