* VirtIO-MMIO on MMU-less System
@ 2014-10-28 16:42 Christopher Covington
2014-10-28 16:48 ` Pawel Moll
2014-10-28 16:51 ` Peter Maydell
0 siblings, 2 replies; 3+ messages in thread
From: Christopher Covington @ 2014-10-28 16:42 UTC (permalink / raw)
To: virtualization@lists.linux-foundation.org, Pawel Moll; +Cc: Peter Maydell
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
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: VirtIO-MMIO on MMU-less System
2014-10-28 16:42 VirtIO-MMIO on MMU-less System Christopher Covington
@ 2014-10-28 16:48 ` Pawel Moll
2014-10-28 16:51 ` Peter Maydell
1 sibling, 0 replies; 3+ messages in thread
From: Pawel Moll @ 2014-10-28 16:48 UTC (permalink / raw)
To: Christopher Covington
Cc: Peter Maydell, virtualization@lists.linux-foundation.org
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: VirtIO-MMIO on MMU-less System
2014-10-28 16:42 VirtIO-MMIO on MMU-less System Christopher Covington
2014-10-28 16:48 ` Pawel Moll
@ 2014-10-28 16:51 ` Peter Maydell
1 sibling, 0 replies; 3+ messages in thread
From: Peter Maydell @ 2014-10-28 16:51 UTC (permalink / raw)
To: Christopher Covington
Cc: Pawel Moll, virtualization@lists.linux-foundation.org
On 28 October 2014 16:42, Christopher Covington <cov@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
^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-10-28 16:42 VirtIO-MMIO on MMU-less System Christopher Covington
2014-10-28 16:48 ` Pawel Moll
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