Re: [PATCH v4 2/2] target/s390x: support SHA-512 extensions

["Jason A. Donenfeld" <Jason@zx2c4.com>]

Hi,

On Thu, Aug 04, 2022 at 10:10:52AM +0200, David Hildenbrand wrote:
> > Hm, you don't really want to implement some kind of particial complete.
> > Qemu is an emulation and you would have to implement some kind of
> > fragmenting this based on machine generation.
> 
> Do we?
> 
> "The
> CPU-determined number of bytes depends on the
> model, and may be a different number each time the
> instruction is executed. The CPU-determined number
> of bytes is usually nonzero. In certain unusual situa-
> tions, this number may be zero, and condition code 3
> may be set with no progress. However, the CPU pro-
> tects against endless recurrence of this no-progress
> case.
> "
> 
> I read that as "do what you want, even on a given model it might be random."

Just FYI, I implemented this, and it works in v6. Please take a look at:
https://lore.kernel.org/qemu-devel/20220803171536.1314717-2-Jason@zx2c4.com/

So we can keep that. Or I can send a v7 that removes it.

It wasn't very hard to implement, and it's not very hard to remove, so
either way, just tell me what you want to do.

Jason