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

[Cornelia Huck <cohuck@redhat.com>]

On Thu, 10 Jan 2019 10:02:48 -0500
"Jason J. Herne" <jjherne@linux.ibm.com> wrote:

> On 1/10/19 7:15 AM, Cornelia Huck wrote:
> > On Wed, 9 Jan 2019 15:01:19 -0500
> > "Jason J. Herne" <jjherne@linux.ibm.com> wrote:
> >   
> >> On 1/9/19 1:34 PM, Cornelia Huck wrote:  
> >>> On Wed, 9 Jan 2019 13:10:26 -0500
> >>> "Jason J. Herne" <jjherne@linux.ibm.com> wrote:  
> >   
> >>>> I'm not sure what value there is in abstracting sense at the moment. I'm not even sure
> >>>> what other device's sense data looks like. Since my description of the SENSE CCW comes
> >>>> from an ECKD reference I have not been able to verify any areas of the data that are
> >>>> common across device types. Thoughts?  
> >>>
> >>> There's SA22-7204-01 ("Common I/O Device Commands"), which is from 1992
> >>> (this is what I have on my disk -- is there anything newer?). It
> >>> specifies what bits 0-5 of byte 0 mean and states that bytes 1-31 are
> >>> optional and device-specific.
> >>>
> >>> Maybe some other bits have been specified after 1992, but I have not
> >>> come across documentation for them.  
> >>
> >> That publication is no longer available. According to my quick research it has been
> >> replaced by an internal only publication. I'll see what I can find.  
> > 
> > The publication no longer being available is not good, as it is a
> > normative reference pointed to by the virtio standard (see
> > http://docs.oasis-open.org/virtio/virtio/v1.0/cs04/virtio-v1.0-cs04.html#x1-30001)
> > :(
> > 
> > Is there any chance that at least that old version can be made
> > available again?  
> 
> A quick web search turns up the following link:
> http://publibz.boulder.ibm.com/support/libraryserver/FRAMESET/DZ9AR501/CCONTENTS?D
> 
> So I guess it is available, even if the document has been superseded internally.

Cool, thanks for checking!