lkml.org 
[lkml]   [2020]   [May]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 01/18] nitro_enclaves: Add ioctl interface definition
From
Date
On Wed, 2020-05-27 at 09:49 +0100, Stefan Hajnoczi wrote:
>
> What about feature bits or a API version number field? If you add
> features to the NE driver, how will userspace detect them?
>
> Even if you intend to always compile userspace against the exact kernel
> headers that the program will run on, it can still be useful to have an
> API version for informational purposes and to easily prevent user
> errors (running a new userspace binary on an old kernel where the API is
> different).
>
> Finally, reserved struct fields may come in handy in the future. That
> way userspace and the kernel don't need to explicitly handle multiple
> struct sizes.

Beware, Greg might disagree :)

That said, yes, at least a way to query the API version would be
useful.

Cheers,
Ben.


\
 
 \ /
  Last update: 2020-06-01 05:04    [W:0.076 / U:1.604 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site