Hi all,
Since it looks like creating alias regions is the path forward, I’d like
to summarize the discussion to make sure we’re all aligned. From my
understanding, the main steps are:
- Introduce helpers to create compact offsets, likely leveraging
mt. No changes to the vfio ops APIs are required, since the mt should
live within the vfio struct itself.
- Add a WC flag to regions.
- Define a new UAPI for creating alias regions with new
offsets. This UAPI should support aliasing existing regions as well
as specifying additional flags such as WC.
- Enable WC support for mmap.
I plan to start working on an RFC covering these points over the next
1–2 weeks.
Thanks,
MNAdam
Amazon Web Services Development Center Germany GmbH
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