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author | David Vrabel <david.vrabel@citrix.com> | 2013-03-15 14:55:41 +0400 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-01-06 19:07:52 +0400 |
commit | bf2bbe07f13846a90d4447521d87566d6f87bc0e (patch) | |
tree | 930d312f8d74a5892fb37429969de6016cc3eb6a /include/xen/events.h | |
parent | 0dc0064add422bc0ef5165ebe9ece3052bbd457d (diff) | |
download | linux-bf2bbe07f13846a90d4447521d87566d6f87bc0e.tar.xz |
xen/events: Add the hypervisor interface for the FIFO-based event channels
Add the hypercall sub-ops and the structures for the shared data used
in the FIFO-based event channel ABI.
The design document for this new ABI is available here:
http://xenbits.xen.org/people/dvrabel/event-channels-H.pdf
In summary, events are reported using a per-domain shared event array
of event words. Each event word has PENDING, LINKED and MASKED bits
and a LINK field for pointing to the next event in the event queue.
There are 16 event queues (with different priorities) per-VCPU.
Key advantages of this new ABI include:
- Support for over 100,000 events (2^17).
- 16 different event priorities.
- Improved fairness in event latency through the use of FIFOs.
The ABI is available in Xen 4.4 and later.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'include/xen/events.h')
0 files changed, 0 insertions, 0 deletions