vl: configure accelerators from -accel options

Drop the "accel" property from MachineState, and instead desugar
"-machine accel=" to a list of "-accel" options.

This has a semantic change due to removing merge_lists from -accel.
For example:

- "-accel kvm -accel tcg" all but ignored "-accel kvm".  This is a bugfix.

- "-accel kvm -accel thread=single" ignored "thread=single", since it
  applied the option to KVM.  Now it fails due to not specifying the
  accelerator on "-accel thread=single".

- "-accel tcg -accel thread=single" chose single-threaded TCG, while now
  it will fail due to not specifying the accelerator on "-accel
  thread=single".

Also, "-machine accel" and "-accel" become incompatible.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/libqtest.c b/tests/libqtest.c
index f36e30a4de..76c9f8eade 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -241,9 +241,9 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
                               "-qtest-log %s "
                               "-chardev socket,path=%s,id=char0 "
                               "-mon chardev=char0,mode=control "
-                              "-accel qtest "
                               "-display none "
-                              "%s", qemu_binary, socket_path,
+                              "%s"
+                              " -accel qtest", qemu_binary, socket_path,
                               getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
                               qmp_socket_path,
                               extra_args ?: "");