On Tue, Apr 30, 2013 at 09:56:22AM -0500, Suthikulpanit, Suravee wrote:
> This sounds more like issue with the order of how things are
> initialized in the system.
No, the problem is that almost all BIOS-provided IVRS tables are buggy
because they do not define a unity-mapped region for devices that need
one (like USB controllers). So there is a time window from iommu driver
initialization to where the usb driver takes over the controller where
these io-page-faults can happen.
Joerg
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
