This is an RFC because it's not 100% finished yet and I'm not sure if some of the changes are the way to go.
Here's a summary of the series its issues, more details can be found in the patches: o Patches 1 to 11 convert several qemu-option and qemu-config functions from qerror_report() to error_set(). Note that not all users of those functions are converted, so it might be needed to call qerror_report_err() somewhere in the call stack to keep QError semantics. Also, new versions of qemu_opt_set() and qemu_find_opts() that take an Error parameter are introduced. This allows for incremental conversion (vs. converting 100% of their users in one series) o Patch 12 introduces support for allowing QAPI functions to accept a variable list of arguments, which are unchecked and passed "as-is" to the QAPI function. My implementation here is very hacky, please check the patch for details o Patch 13 does the QAPI conversion itself, but the HMP version of device_add lacks its help text (ie. '?'). The problem here is that hmp.c is really a QMP client and can only use what's provided by QMP. There are two ways to solve this: 1. Anthony told me that he has this implemented in his tree, but I couldn't find it. Anthony, can you point me to your implementation? 2. Add a query-drivers command or similar to get a list of drivers, so that the HMP command can use it to implement the help text blockdev.c | 2 +- hmp-commands.hx | 3 +- hmp.c | 24 +++++++ hmp.h | 1 + hw/qdev-monitor.c | 70 ++++++++++++++----- hw/qdev.h | 2 +- hw/usb/dev-storage.c | 2 +- hw/watchdog.c | 2 +- qapi-schema.json | 38 ++++++++++ qemu-char.c | 8 ++- qemu-config.c | 43 +++++++++--- qemu-config.h | 3 + qemu-option.c | 173 +++++++++++++++++++++++++++++++--------------- qemu-option.h | 6 +- qemu-sockets.c | 8 +-- qerror.c | 4 ++ qerror.h | 3 + qmp-commands.hx | 3 +- scripts/qapi-commands.py | 31 ++++++++- scripts/qapi.py | 2 + vl.c | 25 ++++--- 21 files changed, 342 insertions(+), 111 deletions(-)