Re: [Qemu-devel] [PATCH 0/8] Add virtio-mmio and use it in vexpress

[Peter Maydell]

On 8 July 2013 14:16, Alexander Graf <address@hidden> wrote:
>
> On 08.07.2013, at 15:08, Peter Maydell wrote:
>
>> On 8 July 2013 13:59, Alexander Graf <address@hidden> wrote:
>>> On 08.07.2013, at 14:57, Alexander Graf wrote:
>>>> On 27.06.2013, at 15:04, Peter Maydell wrote:
>>>>> The basic idea is that the board instantiates some transports,
>>>>
>>>> I really dislike that idea. Couldn't you also create a new
>>>> bus for your vexpress platform and add a virtio-mmio-vexpress
>>>> device that automatically allocates an interrupt from the main
>>>> PIC on instantiation? That way you could create transports
>>>> using -device.
>>
>> This doesn't seem to gain anything except that the user has
>> to use -device twice rather than once.
>
> Yes, it does. You can have other devices than just virtio ones
> on those IRQ lines. Assigned devices for example.

Now I'm completely confused. Why would assigned devices
have anything to do with this? Can you explain in more
detail, because I don't really see what you're suggesting?

>> As far as I know there's no way to find out at board
>> construction how many virtio devices you might want.
>
> Hence you shouldn't create them :).

You've got to create them sometime...

-- PMM