[PATCH v3 0/6] qtests: Check accelerator available at runtime via QMP 'query-accels'

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Hi,

This series aims at having accelerator-independent qtests
by querying a QEMU instance at runtime to check the list
of built-in accelerators.

First we add the 'query-accels' QMP command,
then we add the qtest_has_accel() method to libqtest,
finally we use this new method to allow running
bios-tables-test on KVM-only builds.

As a bonus we remove CONFIG_TCG in config_host, to avoid
building unnecessary objects depending on TCG.

Missing review:
- #4 qtest/qmp-cmd-test: Make test build-independent from accelerator
- #6 tests/meson: Only build softfloat objects if TCG is selected

Since v2:
- Addressed Eric & Paolo review comments

Since v1:
- kept over-engineered union (I don't how to do simple enum)
- dropped arm-cpu-features patches for now
- fixed typos (Eric)
- rename qtest_has_accel (Thomas)
- probe accel with machine none previous qtest (Paolo)
- iterate over QAPI enum (Markus)

Eric's suggestion of conditional QAPI didn't worked out,
as accelerator definitions are poisoned.

Please review,

Phil.

Philippe Mathieu-Daudé (6):
  accel: Introduce 'query-accels' QMP command
  tests/qtest: Add qtest_has_accel() method
  qtest/bios-tables-test: Make test build-independent from accelerator
  qtest/qmp-cmd-test: Make test build-independent from accelerator
  tests/qtest: Do not restrict bios-tables-test to Aarch64 hosts anymore
  tests/meson: Only build softfloat objects if TCG is selected

 meson.build                    |  1 -
 qapi/machine.json              | 49 +++++++++++++++++
 tests/qtest/libqos/libqtest.h  |  8 +++
 accel/accel-qmp.c              | 49 +++++++++++++++++
 tests/qtest/bios-tables-test.c | 99 ++++++++++++++++++----------------
 tests/qtest/libqtest.c         | 29 ++++++++++
 tests/qtest/qmp-cmd-test.c     | 18 +++++--
 accel/meson.build              |  2 +-
 tests/qtest/meson.build        |  3 +-
 9 files changed, 203 insertions(+), 55 deletions(-)
 create mode 100644 accel/accel-qmp.c

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2.26.3