diff options
| author | Dan Williams <[email protected]> | 2015-11-11 16:27:33 -0800 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2015-11-16 11:29:10 -0500 |
| commit | d684a90d38e24dcaf95fdb32c83efe05f80d152a (patch) | |
| tree | 855bb8396232c9b682394125c46ada2671452bca /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf | |
| parent | 4d92f0099a06ef0e36c7673f7c090f1a448b2d1b (diff) | |
ahci: per-port msix support
Some AHCI controllers support per-port MSI-X vectors. At the same time
the Linux AHCI driver needs to support one-off architectures that
implement a single MSI-X vector for all ports. The heuristic for
enabling AHCI ports becomes, in order of preference:
1/ per-port multi-MSI-X
2/ per-port multi-MSI
3/ single MSI
4/ single MSI-X
5/ legacy INTX
This all depends on AHCI implementations with potentially broken MSI-X
requesting less vectors than the number of ports. If this assumption is
violated we will need to start explicitly white-listing AHCI-MSIX
implementations.
Reported-by: Ricardo Neri <[email protected]>
[ricardo: fix struct msix_entry handling]
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf')
0 files changed, 0 insertions, 0 deletions