[PATCH v3 5/7] drm/panfrost: Add a new ioctl to submit batches

[Alyssa Rosenzweig]

> My concern is if we ever find a security bug which requires new
> information/behaviour in the submit ABI to properly fix. In this case it
> would be appropriate to backport a 'feature' (bug fix) which provides a
> new ABI but it would need to be a small change. A flags field where we
> can set a "PANFROST_ACTUALLY_BE_SECURE" bit would be useful then - but
> we wouldn't want to start bumping version numbers in the backport.
> 
> But at least for now we could just assume we'll expand the ioctl struct
> if we ever hit that situation, so no need for an explicit flags field.

I'm curious if kbase ever hit something like this? It wouldn't have
occurred to me as a possibility.