[Qemu-devel] [PATCH 0/3] Migrate with destination version

[Dr. David Alan Gilbert (git)]

From: "Dr. David Alan Gilbert" <address@hidden>

This patch set provides an optional parameter to 'migrate' giving
the destination QEMU version, it's intended for those having to maintain
compatibility between minor versions (including downstream versions) and
also for those who need to think about backwards migration.

There aren't any uses of the migration version in this patch set, however
uses I can think of include:
    a) Generating an old format for a particular device when sent to a
       particular version
    b) Fudging a register value for a particular version
    c) Fudging around more general problems (e.g. the 1.6.x short PCI naming)

If we had a way for the 'save' side of migrate to fail cleanly with an error
then we could also do some pre-migrate checks and flag things that just aren't
going to work (e.g. noticing that a new feature is enabled on a device that
the old one doesn't have).

Dave

Dr. David Alan Gilbert (3):
  hmp: Allow options with parameters
  Pass optional destination version hint to migrate
  Add optional migrate version to hmp migrate command

 hmp-commands.hx               |   9 ++--
 hmp.c                         | 109 +++++++++++++++++++++++++++++++++++++++++-
 include/migration/migration.h |   1 +
 migration.c                   |  17 +++++++
 monitor.c                     |  19 +++++++-
 qapi-schema.json              |   5 +-
 qmp-commands.hx               |   3 +-
 7 files changed, 155 insertions(+), 8 deletions(-)

-- 
1.9.3