diff options
| author | Dave Jiang <[email protected]> | 2023-04-07 13:31:31 -0700 |
|---|---|---|
| committer | Vinod Koul <[email protected]> | 2023-04-12 23:18:45 +0530 |
| commit | 2f431ba908d2ef05da478d10925207728f1ff483 (patch) | |
| tree | 32295e95fc493a45e01d8b81ea388fab8afcb421 /tools/testing/selftests/bpf/progs/test_autoload.c | |
| parent | 244da66cda359227d80ccb41dbcb99da40eae186 (diff) | |
dmaengine: idxd: add interrupt handling for event log
An event log interrupt is raised in the misc interrupt INTCAUSE register
when an event is written by the hardware. Add basic event log processing
support to the interrupt handler. The event log is a ring where the
hardware owns the tail and the software owns the head. The hardware will
advance the tail index when an additional event has been pushed to memory.
The software will process the log entry and then advances the head. The
log is full when (tail + 1) % log_size = head. The hardware will stop
writing when the log is full. The user is expected to create a log size
large enough to handle all the expected events.
Tested-by: Tony Zhu <[email protected]>
Signed-off-by: Dave Jiang <[email protected]>
Co-developed-by: Fenghua Yu <[email protected]>
Signed-off-by: Fenghua Yu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_autoload.c')
0 files changed, 0 insertions, 0 deletions