Re: [Qemu-devel] Deprecating old machine types

[Paolo Bonzini]

On 29/03/2017 18:46, Dr. David Alan Gilbert wrote:
>> By the way, what about old machine types like "pc-0.10" ? Do we want to
>> carry them along forever (e.g. since it is not too complicated to
>> maintain?), or shall we get rid of those one day (e.g. with QEMU 3.0), too?
> It seems reasonable to slowly deprecate them.
> I'm just not sure how slowly.

Some data:

- dropping 0.12, 0.13 _and_ isapc would let us kill the code for
rombar=0 (i.e. where QEMU copies ROM BARs directly to low memory).

- the oldest versions in use are probably 0.12 (CentOS 6) and 1.0
(Ubuntu 12.04)

- migration from old versions is broken in various ways from at least
QEMU 1.2 and older.

Paolo