On Nov 11, 2019, at 12:23 AM, Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx> wrote:
The scalable mode is defined in VT-d 3.0. The scalable mode capability
could be checked by reading /sys/devices/virtual/iommu/dmar*/intel-
iommu/ecap. It's currently not friendly for reading. You need to decode
it according to the spec.
This looks like some perfect information to put in the Kconfig description.