Merge remote-tracking branch 'remotes/elmarco/tags/machine-props-pull-request' into staging

Generalize machine compatibility properties

During "[PATCH v2 05/10] qom/globals: generalize
object_property_set_globals()" review, Eduardo suggested to rework the
GlobalProperty handling, so that -global is limited to QDev only and
we avoid mixing the machine compats and the user-provided -global
properties (instead of generalizing -global to various object kinds,
like I proposed in v2).

"qdev: do not mix compat props with global props" patch decouples a
bit user-provided -global from machine compat properties. This allows
to get rid of "user_provided" and "errp" fields in following patches.

A new compat property "x-use-canonical-path-for-ramblock-id" is added
to hostmem for legacy canonical path names, set to true for -file and
-memfd with qemu < 4.0.

(this series was initially titled "[PATCH v2 00/10] hostmem: use
object "id" for memory region name with >= 3.1", but its focus is more
in refactoring the global and compatilibity properties handling now)

# gpg: Signature made Mon 07 Jan 2019 12:22:43 GMT
# gpg:                using RSA key DAE8E10975969CE5
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>"
# gpg:                 aka "Marc-André Lureau <marcandre.lureau@gmail.com>"
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* remotes/elmarco/tags/machine-props-pull-request: (28 commits)
  hostmem: use object id for memory region name with >= 4.0
  arm: replace instance_post_init()
  qdev-props: call object_apply_global_props()
  qdev-props: remove errp from GlobalProperty
  qdev-props: convert global_props to GPtrArray
  qdev: all globals are now user-provided
  qdev: make a separate helper function to apply compat properties
  compat: remove remaining PC_COMPAT macros
  include: remove compat.h
  compat: replace PC_COMPAT_2_1 & HW_COMPAT_2_1 macros
  compat: replace PC_COMPAT_2_2 & HW_COMPAT_2_2 macros
  compat: replace PC_COMPAT_2_3 & HW_COMPAT_2_3 macros
  compat: replace PC_COMPAT_2_4 & HW_COMPAT_2_4 macros
  compat: replace PC_COMPAT_2_5 & HW_COMPAT_2_5 macros
  compat: replace PC_COMPAT_2_6 & HW_COMPAT_2_6 macros
  compat: replace PC_COMPAT_2_7 & HW_COMPAT_2_7 macros
  compat: replace PC_COMPAT_2_8 & HW_COMPAT_2_8 macros
  compat: replace PC_COMPAT_2_9 & HW_COMPAT_2_9 macros
  compat: replace PC_COMPAT_2_10 & HW_COMPAT_2_10 macros
  compat: replace PC_COMPAT_2_11 & HW_COMPAT_2_11 macros
  ...

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