Merge remote-tracking branch 'remotes/marcel/tags/rdma-pull-request' into staging

RDMA queue

* better memory registration performance

# gpg: Signature made Wed 06 Nov 2019 14:37:47 GMT
# gpg:                using RSA key 36D4C0F0CF2FE46D
# gpg: Good signature from "Marcel Apfelbaum <marcel.apfelbaum@zoho.com>" [marginal]
# gpg:                 aka "Marcel Apfelbaum <marcel@redhat.com>" [marginal]
# gpg:                 aka "Marcel Apfelbaum <marcel.apfelbaum@gmail.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: B1C6 3A57 F92E 08F2 640F  31F5 36D4 C0F0 CF2F E46D

* remotes/marcel/tags/rdma-pull-request:
  hw/rdma: Utilize ibv_reg_mr_iova for memory registration
  configure: Check if we can use ibv_reg_mr_iova

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