On Wed, Apr 27, 2016 at 04:37:04PM +0300, Michael S. Tsirkin wrote: > One correction: it's a feature of the device in the system. > There could be a mix of devices bypassing and not > bypassing the IOMMU. No, it really is not. A device can't chose to bypass the IOMMU. But the IOMMU can chose to let the device bypass. So any fix here belongs into the platform/iommu code too and not into some driver. > Sounds good. And a way to detect appropriate devices could > be by looking at the feature flag, perhaps? Again, no! The way to detect that is to look into the iommu description structures provided by the firmware. They provide everything necessary to tell the iommu code which devices are not translated. Joerg -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
