On Wed, Jul 27, 2016 at 11:59:18PM -0700, Christoph Hellwig wrote:
> Again, this is still the wrong way around. A "noiommu" feature is a
> quirk and should not be the default.
Christoph, I'm not sure what you mean by the default here.
We read a register from the device (bit 33 in the feature qwo
Again, this is still the wrong way around. A "noiommu" feature is a
quirk and should not be the default.
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The interaction between virtio and IOMMUs is messy.
On most systems with virtio, physical addresses match bus addresses,
and it doesn't particularly matter which one we use to program
the device.
On some systems, including Xen and any system with a physical device
that speaks virtio behind a phys
