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

[Cornelia Huck]

On Fri, 6 Jul 2018 13:42:25 +0200
Halil Pasic <address@hidden> wrote:

> On 07/06/2018 10:03 AM, Cornelia Huck wrote:
> > On Thu,  5 Jul 2018 13:25:38 -0400
> > "Jason J. Herne" <address@hidden> wrote:
> >> +    rc = ssch(schid, &orb);
> >> +    if (rc) {
> >> +        print_int("ssch failed with rc=", rc);
> >> +        return rc;  
> > 
> > Are you doing anything like retrying on cc 1/2? It's probably fine to
> > give up on cc 3.
> >   
> 
> We are in IPL context. We should have exclusive access to the DASD
> we are IPL-ing from, or not? My understanding was that if the layers
> below us don't violate the rules, we should never observe cc 1 or 2
> here. Or am I wrong?

cc 2 probably not (nobody should be doing a halt or a clear), but cc 1
if there's some unsolicited status pending?