Peter Maydell <peter.mayd...@linaro.org> wrote: > On Fri, 9 Aug 2019 at 11:29, Damien Hedde <damien.he...@greensocs.com> wrote: >> >> One way to keep the feature without copy-pasting vmsd would be to add >> a new vmstate_register with an additional argument to pass the base >> class vmsd section and handle the whole thing there. > > If we have a vmstate section which contains no actual data, > only subsections with 'needed' functions, is it migration > compatible with previous versions in the same way that > tacking a subsection onto an existing function is?
Not now, but we can make it happen. Right now, we first send the VMSD "header", and then we sent whatever data is in it. We can it make work the way you want. Not sure if that is the best way, though. Sections that can(or can't) be there make just reasoning about the stream more difficult. Later, Juan.
