Re: [PATCH 1/6] accel: Introduce 'query-accels' QMP command

[Thomas Huth <thuth@redhat.com>]

On 12/03/2021 08.42, Marc-André Lureau wrote:
> 
> 
> On Fri, Mar 12, 2021 at 3:14 AM Philippe Mathieu-Daudé <philmd@redhat.com 
> <mailto:philmd@redhat.com>> wrote:
> 
[...]
>     +##
>     +# @AcceleratorInfo:
>     +#
>     +# Accelerator information.
>     +#
>     +# @name: The accelerator name.
>     +#
>     +# Since: 6.0
>     +##
>     +{ 'union': 'AcceleratorInfo',
>     +  'base': {'name': 'Accelerator'},
>     +  'discriminator': 'name',
>     +  'data': { } }
> 
>     +
> 
> 
> Making room for future details, why not.

I think we definitely need the additional data section here: For KVM on 
POWER, it would be good to know whether it's KVM-HV or KVM-PR, for KVM on 
MIPS it would be good to know whether it's KVM_VM_MIPS_VZ or KVM_VM_MIPS_TE, 
for KVM on x86 whether it's the AMD flavor or Intel, ...

>     +##
>     +# @query-accels:
>     +#
>     +# Get a list of AcceleratorInfo for all built-in accelerators.
>     +#
>     +# Returns: a list of @AcceleratorInfo describing each accelerator.
>     +#
>     +# Since: 6.0
>     +#
>     +# Example:
>     +#
>     +# -> { "execute": "query-accels" }
>     +# <- { "return": [
>     +#        {
>     +#            "type": "qtest"
>     +#        },
>     +#        {
>     +#            "type": "kvm"
>     +#        }
>     +#    ] }
>     +#
>     +##
>     +{ 'command': 'query-accels',
>     +  'returns': ['AcceleratorInfo'] }
> 
> 
> That's nice, but how do you know which accels are actually enabled?

I guess we need two commands in the end, one for querying which accelerators 
are available, and one for querying the data from the currently active 
accelerator...?

  Thomas