QEMU modules improvements objective (Was: Re: [RFC 0/3] Improve module accelerator error message)

[Claudio Fontana]

On 7/1/21 1:27 AM, Jose R. Ziviani wrote:
> Hello!
> 
> I'm sending this as RFC because it's based on a patch still on
> review[1], so I'd like to see if it makes sense.
> 
> Tt will improve the error message when an accelerator module could
> not be loaded. Instead of the current assert error, a formated
> message will be displayed.
> 
> [1] https://patchwork.kernel.org/project/qemu-devel/list/?series=506379
> 
> Jose R. Ziviani (3):
>   modules: Add CONFIG_TCG_MODULAR in config_host
>   modules: Implement module_is_loaded function
>   qom: Improve error message in module_object_class_by_name()
> 
>  include/qemu/module.h |  3 +++
>  meson.build           |  3 +++
>  qom/object.c          | 30 ++++++++++++++++++++++++++++++
>  util/module.c         | 28 +++++++++++++++++++++-------
>  4 files changed, 57 insertions(+), 7 deletions(-)
> 

Open question to all,

why don't we have/add the ability to configure

CONFIG_XXX=m

for all potentially modular pieces?

It should be possible to say, I want to build the storage plugins as modules, 
TCG I would like it built-in, and KVM as a module,
or any combination of these.

The most useful combination I see for virtualization use of qemu is with TCG as 
a module (M), KVM as built-in (Y), and various other optional pieces as modules 
(M).

Should this not be the vision? To me it looks that way.

Thanks,

Claudio