CP15 support

Registered by Michael Hope on 2012-06-20

CP15 support

Blueprint information

Status:
Complete
Approver:
Michael Hope
Priority:
Essential
Drafter:
Michael Hope
Direction:
Approved
Assignee:
Rusty Russell
Definition:
Approved
Series goal:
Accepted for trunk
Implementation:
Implemented
Milestone target:
None
Started by
Michael Hope on 2012-06-20
Completed by
Peter Maydell on 2012-11-01

Related branches

Sprints

Whiteboard

[1] Marc: HSTR is deprecated ... Instead, we should only use HCR which should contain all the necessary bits. HSTR is viewed internally as "the workaround when everything else has failed...".

HSTR is still needed in some places.

[2] between the host and guest and indirectly guest to guest
[3] such as an ECC error while you're in HYP mode. Now panics which matches the host kernel

(?)

Work Items

Work items:
Audit for correct trapping including removing use of the HSTR[1]: DONE
Save and restore on world switch[2]: DONE
Userspace save/restore: DONE
HYP mode abort handlers[3]: DONE

Dependency tree

* Blueprints in grey have been implemented.

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