On Sat, Mar 20, 2021 at 12:22:08AM +0900, Keith Busch wrote:

quoted

I think this is a horrible idea.  Userspace has no business touching
registers even read-only.  MMIO reads can have side effects as well,
intentional or unintentional, and we also open up a whole can of worms
of mismatched memory attributes.

I was thinking the driver wouldn't opt-in if there were read side
effects, but yeah, it's too fragile. I withdraw the suggestion.

I'd still like to understand what values in CSTS Alan cares about.  I
don't think just dumping a register with somewhat awkward encodings
is a good idea.

_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme