This series fixes an issue where the outcome of the migration qtest
relies on the initial memory contents all being the same across the
first 100MiB of RAM, which is a very fragile invariant.
 
We fix this by making sure we zero the first byte of every testable page
in range beforehand.

Changes since v1:
- Add a fix for the s390x test binary as well as suggested by Peter Xu

Daniil Tatianin (3):
  i386/a-b-bootblock: factor test memory addresses out into constants
  i386/a-b-bootblock: zero the first byte of each page on start
  s390x/a-b-bios: zero the first byte of each page on start

 tests/migration/i386/a-b-bootblock.S |  18 +-
 tests/migration/i386/a-b-bootblock.h |  16 +-
 tests/migration/s390x/a-b-bios.c     |   8 +
 tests/migration/s390x/a-b-bios.h     | 380 ++++++++++++++-------------
 4 files changed, 234 insertions(+), 188 deletions(-)

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2.34.1