Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20150707' into...

migration/next for 20150707

# gpg: Signature made Tue Jul  7 13:56:30 2015 BST using RSA key ID 5872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"

* remotes/juanquintela/tags/migration/20150707: (28 commits)
  migration: extend migration_bitmap
  migration: protect migration_bitmap
  check_section_footers: Check the correct section_id
  migration: Add migration events on target side
  migration: Make events a capability
  migration: create migration event
  migration: No need to call trace_migrate_set_state()
  migration: Use always helper to set state
  migration: ensure we start in NONE state
  migration: Use cmpxchg correctly
  migration: Add configuration section
  vmstate: Create optional sections
  global_state: Make section optional
  migration: create new section to store global state
  runstate: migration allows more transitions now
  runstate: Add runstate store
  Fix older machine type compatibility on power with section footers
  Fail more cleanly in mismatched RAM cases
  Sanity check RDMA remote data
  Sort destination RAMBlocks to be the same as the source
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>