28 Jul
2023
28 Jul
'23
10:07 a.m.
From: Liu, Yi L yi.l.liu@intel.com Sent: Monday, July 24, 2023 7:04 PM
This reports device's reserved IOVA regions to userspace. This is needed in the nested translation as userspace owns stage-1 HWPT, and userspace needs to exclude the reserved IOVA regions in the stage-1 HWPT hence exclude them in the device's DMA address space.
This can also be used to figure out allowed IOVAs of an IOAS.
We may need a special type to mark SW_MSI since it requires identity mapping in stage-1 instead of being reserved.