Multiple targets register a virt board as MACHINE_TYPE_NAME("virt").
Those QOM types collide if more than one board is linked into one
qemu-system process. This series splits the QOM type from the -M name
so each virt board can keep a unique type while -M virt, help, and
migration stay the same.

- Add machine_class_set_name() so boards can set MachineClass::name
  when it must differ from the QOM type. machine_class_base_init still
  defaults the name to the QOM type without -machine. Document that
  MachineClass::name is the -M name, not the QOM type. Sort -M help
  by that name so order matches the printed names after types are
  prefixed (arm-virt-11.1-machine vs virt-11.1).
- Give each colliding virt board a unique QOM type and keep the
  existing -M name via machine_class_set_name(): riscv-virt, arm-virt,
  or1k-virt, hexagon-virt, loongarch-virt, m68k-virt, and xtensa-virt.
  Versioned ARM, LoongArch, and M68K boards keep virt-<ver>. Latest
  ARM virt still sets mc->alias to virt.
- query-machines returns MachineInfo typename, the QOM type from
  object_class_get_name(), for qom-list-properties. The -M name alone
  is not that type once virt boards are prefixed.

Changes v2 -> v3:
The versioned-machine example in boards.h now follows hw/arm/virt.c.
machine_class_set_name() keeps the -M name as virt-<version>, the QOM type in
the example is arm-virt, and the latest helper is DEFINE_VIRT_MACHINE_AS_LATEST.

Changes v1 -> v2:
- query-machines returns MachineInfo typename. v1 returned only the
  -M name, so a client that appended "-machine" looked up the wrong
  type for a prefixed board such as arm-virt-11.1-machine versus
  -M virt-11.1.

Yonggang Luo (10):
  machine: allow -M name to differ from QOM type
  hw/riscv/virt: use unique QOM name
  hw/arm/virt: use unique QOM name
  hw/or1k/virt: use unique QOM name
  hw/hexagon/virt: use unique QOM name
  hw/loongarch/virt: use unique QOM name
  hw/m68k/virt: use unique QOM name
  hw/xtensa/virt: use unique QOM name
  qapi: return MachineInfo typename from query-machines
  machine: match the versioned virt example to arm virt

 hw/arm/virt.c               |  3 +-
 hw/core/machine-qmp-cmds.c  |  1 +
 hw/core/machine.c           |  6 ++++
 hw/hexagon/virt.c           |  1 +
 hw/loongarch/virt.c         |  3 +-
 hw/m68k/virt.c              |  7 ++--
 hw/or1k/virt.c              |  3 +-
 hw/riscv/virt.c             |  3 +-
 hw/xtensa/virt.c            |  3 +-
 include/hw/arm/virt.h       |  2 +-
 include/hw/core/boards.h    | 26 +++++++++++----
 include/hw/hexagon/virt.h   |  2 +-
 include/hw/loongarch/virt.h |  2 +-
 include/hw/riscv/virt.h     |  2 +-
 qapi/machine.json           |  6 +++-
 system/vl.c                 |  8 ++---
 tests/qtest/qom-test.c      | 65 +++++++++++++++++++++++++++++++++----
 17 files changed, 113 insertions(+), 30 deletions(-)

-- 
2.52.0.windows.1