Re: [Qemu-devel] [PATCH 0/2] pcspk migration compatibility

[Dr. David Alan Gilbert]

* Paolo Bonzini (address@hidden) wrote:
> 
> 
> On 28/11/2016 14:31, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <address@hidden>
> > 
> > Hi,
> >   39c88f56 added VMState for pcspk but turned it on for
> > all machine types, this breaks backwards compatibility
> > to older machine types.
> > 
> >   If this is too late for 2.8 then I suggest we take the 1st
> > of these two patches, which just makes it a property to flip
> > for those of us who need it.  Adding the 2nd patch after 2.8
> > might cause problems for people using 2.8 with 2.7 machine
> > type.
> > 
> > Dave
> > 
> > Dr. David Alan Gilbert (2):
> >   migration/pcspk: Add a property to state if pcspk is migrated
> >   migration/pcspk: Turn migration of pcspk off for 2.7 and older
> > 
> >  hw/audio/pcspk.c     | 10 ++++++++++
> >  include/hw/i386/pc.h |  5 +++++
> >  2 files changed, 15 insertions(+)
> > 
> 
> Wow, I didn't know optional sections existed.  We could have used it for
> hw/char/parallel.c, but that was added only a couple months before
> optional sections.

I'd forgotten that they existed and was about to write them to
solve this problem, and then found the code I apparently reviewed
a year or so ago :-)

> Queued for 2.8.

Thanks.

Dave

> Paolo
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK