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

From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH 0/8] Add virtio-mmio and use it in vexpress
Date: Mon, 08 Jul 2013 16:06:57 -0500
User-agent: Notmuch/0.15.2+202~g0c4b8aa (http://notmuchmail.org) Emacs/23.3.1 (x86_64-pc-linux-gnu)

Alexander Graf <address@hidden> writes:

> On 08.07.2013, at 22:08, Anthony Liguori wrote:
>> I think we're trying to fit a square peg into a round hole.
>> virtio-mmio is a virtio transport where each device has a dedicated set
>> of system resources.
>> Alex, it sounds like you want virtio-mmio-bus which would be a single
>> set of system resources that implemented a virtio bus on top of it.
> Well, what I really want is a sysbus that behaves like PCI from a
> usability point of view ;).

Which means you need to have (1) a discovery mechanism with a stable
addressing mechanism (2) a way to communicate this to the guest from the

That's all that PCI is.  A host controller is a "sysbus" device that
uses a standardized discovery and addressing mechanism.


Anthony Liguori

> Alex

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