Merge remote-tracking branch 'remotes/thuth-gitlab/tags/s390x-pull-request-2021-09...

Merge remote-tracking branch 'remotes/thuth-gitlab/tags/s390x-pull-request-2021-09-07' into staging

* Some CSS related fixes
* Storage key related fixes
* Test SIGILL and SIGSEGV handling in usermode emulation
* Fix SETPREFIX instruction
* Replace PAGE_SIZE, PAGE_SHIFT and PAGE_MASK to fix Alpine compilation
* Add more feature to gen16 default model

# gpg: Signature made Tue 07 Sep 2021 14:07:38 BST
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/thuth-gitlab/tags/s390x-pull-request-2021-09-07:
  s390x/cpumodel: Add more feature to gen16 default model
  s390x: Replace PAGE_SIZE, PAGE_SHIFT and PAGE_MASK
  hw/s390x/s390-skeys: lazy storage key enablement under TCG
  hw/s390x/s390-skeys: rename skeys_enabled to skeys_are_enabled
  hw/s390x/s390-skeys: check if an address is valid before dumping the key
  hw/s390x/s390-skeys: use memory mapping to detect which storage keys to dump
  hw/s390x/s390-skeys: use memory mapping to detect which storage keys to migrate
  s390x/mmu_helper: avoid setting the storage key if nothing changed
  s390x/mmu_helper: move address validation into mmu_translate*()
  s390x/mmu_helper: fixup mmu_translate() documentation
  s390x/mmu_helper: no need to pass access type to mmu_translate_asce()
  s390x/tcg: check for addressing exceptions for RRBE, SSKE and ISKE
  s390x/tcg: convert real to absolute address for RRBE, SSKE and ISKE
  s390x/tcg: fix ignoring bit 63 when setting the storage key in SSKE
  s390x/tcg: wrap address for RRBE
  s390x/ioinst: Fix wrong MSCH alignment check on little endian
  s390x/tcg: fix and optimize SPX (SET PREFIX)
  tests/tcg/s390x: Test SIGILL and SIGSEGV handling
  css: fix actl handling for unit exceptions
  vfio-ccw: forward halt/clear errors

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