Re: [PATCH RFC] virtio-spec: flexible configuration layout

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On 9 November 2011 11:06, Pawel Moll <pawel.moll@xxxxxxx> wrote:
> On Wed, 2011-11-09 at 10:55 +0000, Sasha Levin wrote:
>> On Wed, 2011-11-09 at 10:47 +0000, Pawel Moll wrote:
>> > Yep, it's actually already in 3.2-rc1 (drivers/virtio/virtio_mmio.c) and
>> > in the spec (see Appendix X). And actually the control registers layout
>> > I used was originally based on the PCI "legacy" headers (slightly
>> > simplified), but evolved a bit since. My understanding is that the
>> > changes Michael is proposing affect the PCI device interface only so
>> > they shouldn't affect "my" interface.
>>
>> I didn't know it's in already, might be interesting adding support to it
>> to x86 userspace tools.
>
> Do you mean the qemu or the (non-qemu) KVM tools I know nothing
> about? ;-)
>
> If qemu, Peter got it already running with virtio_mmio on ARM models
> (not upstream yet as far as I know), but I presume the code would we
> mostly non-ARM specific.

The QEMU code is completely non-ARM-specific (apart from the line
in the relevant ARM board models where we instantiate the devices).
I haven't submitted it upstream yet though because really the
virtio transport layer in QEMU needs to be refactored as a qdev
bus first.

-- PMM
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