Merge remote-tracking branch 'remotes/agraf/tags/signed-s390-for-upstream' into staging

Patch queue for s390 - 2015-06-05

This time there are a lot of s390x TCG emulation bug fixes - almost all
of them from Aurelien, who returned from nirvana :).

# gpg: Signature made Fri Jun  5 00:39:27 2015 BST using RSA key ID 03FEDC60
# gpg: Good signature from "Alexander Graf <agraf@suse.de>"
# gpg:                 aka "Alexander Graf <alex@csgraf.de>"

* remotes/agraf/tags/signed-s390-for-upstream: (34 commits)
  target-s390x: Only access allocated storage keys
  target-s390x: fix MVC instruction when areas overlap
  target-s390x: use softmmu functions for mvcp/mvcs
  target-s390x: support non current ASC in s390_cpu_handle_mmu_fault
  target-s390x: add a cpu_mmu_idx_to_asc function
  target-s390x: implement high-word facility
  target-s390x: implement load-and-trap facility
  target-s390x: implement miscellaneous-instruction-extensions facility
  target-s390x: implement LPDFR and LNDFR instructions
  target-s390x: implement TRANSLATE EXTENDED instruction
  target-s390x: implement TRANSLATE AND TEST instruction
  target-s390x: implement LOAD FP INTEGER instructions
  target-s390x: move SET DFP ROUNDING MODE to the correct facility
  target-s390x: move STORE CLOCK FAST to the correct facility
  target-s390x: change CHRL and CGHRL format to RIL-b
  target-s390x: fix CLGIT instruction
  target-s390x: fix exception for invalid operation code
  target-s390x: implement LAY and LAEY instructions
  target-s390x: move a few instructions to the correct facility
  target-s390x: detect tininess before rounding for FP operations
  ...

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