Re: [Qemu-devel] [qemu-s390x] [PATCH 10/15] s390-bios: Support for running format-0/1 channel programs

[Jason J. Herne]

On 1/7/19 2:02 PM, Jason J. Herne wrote:
> > > @@ -190,6 +247,9 @@ struct ciw {
> > >       __u16 count;
> > >   };
> > > +#define CU_TYPE_VIRTIO          0x3832
> > > +#define CU_TYPE_DASD            0x3990
> >
> > No other dasd types we want to support? :) (Not sure if others are out
> > in the wild. Maybe FBA?)
>
> I have no idea. I assumed 3390 was the only thing we supported. Perhaps 3380? I'd need to 
> find a test device, which I could probably do ... I'll look more into this.

After a few discussions with folks in the lab we've decided that we don't see a ton of 
value in supporting anything other than 3990 at the moment. Anything else would be older 
(3380) and/or rare to see in the wild (and very difficult to test). As for emulated setups 
like z/VM, a user can just use 3390 instead of FBA. So I recommend we move forward with 
3390/3990 support for now. We can always add in others types if/when we need them.

--
-- Jason J. Herne (address@hidden)