Virtualization - Oct 2014 - VirtIO-MMIO on MMU-less System

Just out of curiosity, could VirtIO-MMIO peripherals work on an MMU-less
system, such as a hypothetical M-flavor QEMU TCG virt machine?

Thanks,
Chris

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Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
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On Tue, 2014-10-28 at 16:42 +0000, Christopher Covington
wrote:
> Just out of curiosity, could VirtIO-MMIO peripherals work on an MMU-less
> system, such as a hypothetical M-flavor QEMU TCG virt machine?
The interface is using physical addresses (or physical page numbers), so
MMU or not - it doesn't care.

Now, whether the existing implementation of the drivers (or host-side
implementation of the virtoo device) would work, that's another
question. I see nothing in virtio-mmio driver that clearly wouldn't
work, but you never know...

Pawel

On 28 October 2014 16:42, Christopher Covington <cov at codeaurora.org>
wrote:
> Just out of curiosity, could VirtIO-MMIO peripherals work on an MMU-less
> system, such as a hypothetical M-flavor QEMU TCG virt machine?
No inherent reason, I think. If you care about M profile emulation
you should be aware that it's not currently very high quality,
though...

-- PMM