diff options
Diffstat (limited to 'core/opal.c')
| -rw-r--r-- | core/opal.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/core/opal.c b/core/opal.c index 4ad322cd..f6bd00d7 100644 --- a/core/opal.c +++ b/core/opal.c @@ -157,11 +157,26 @@ void opal_update_pending_evt(uint64_t evt_mask, uint64_t evt_values) /* XXX FIXME: Use atomics instead ??? Or caller locks (con_lock ?) */ lock(&evt_lock); new_evts = (opal_pending_events & ~evt_mask) | evt_values; + if (opal_pending_events != new_evts) { + uint64_t tok; + #ifdef OPAL_TRACE_EVT_CHG - printf("OPAL: Evt change: 0x%016llx -> 0x%016llx\n", - opal_pending_events, new_evts); + printf("OPAL: Evt change: 0x%016llx -> 0x%016llx\n", + opal_pending_events, new_evts); #endif - opal_pending_events = new_evts; + /* + * If an event gets *set* while we are in a different call chain + * than opal_handle_interrupt() or opal_handle_hmi(), then we + * artificially generate an interrupt (OCC interrupt specifically) + * to ensure that Linux properly broadcast the event change internally + */ + if ((new_evts & ~opal_pending_events) != 0) { + tok = this_cpu()->current_token; + if (tok != OPAL_HANDLE_INTERRUPT && tok != OPAL_HANDLE_HMI) + occ_send_dummy_interrupt(); + } + opal_pending_events = new_evts; + } unlock(&evt_lock); } |
