Re: [PATCH v1 3/3] kernel/configs: don't include PCI_QUIRKS in KVM guest configs

Alex Bennée
2020-08-04T15:40:51Z

Marc Zyngier <maz@kernel.org> writes:

> On 2020-08-04 15:44, Alex Bennée wrote:
>> Marc Zyngier <maz@kernel.org> writes:
>>
>>> On 2020-08-04 13:44, Alex Bennée wrote:
>>>> The VIRTIO_PCI support is an idealised PCI bus, we don't need a bunch
>>>> of bloat for real world hardware for a VirtIO guest.
>>>
>>> Who says this guest will only have virtio devices?
>>
>> This is true - although what is the point of kvm_guest.config? We
>> certainly turn on a whole bunch of virt optimised pathways with
>> PARAVIRT
>> and HYPERVISOR_GUEST along with the rest of VirtIO.
>
> Most of which actually qualifies as bloat itself as far as KVM/arm64
> is concerned...

So here is the question - does the kernel care about having a blessed
config for a minimal viable guest? They are certainly used in the cloud
but I understand the kernel is trying to get away from having a zoo of
configs. What is the actual point of kvm_guest.config? Just an easy
enabling for developers?

>
> M.

--
Alex Bennée