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

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On 12/03/2021 08.42, Marc-André Lureau wrote:


On Fri, Mar 12, 2021 at 3:14 AM Philippe Mathieu-Daudé <philmd@xxxxxxxxxx <mailto:philmd@xxxxxxxxxx>> 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




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