diff options
Diffstat (limited to 'kernel/gsp_rm_emulation.c')
| -rw-r--r-- | kernel/gsp_rm_emulation.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/kernel/gsp_rm_emulation.c b/kernel/gsp_rm_emulation.c index c14a767..f395ce6 100644 --- a/kernel/gsp_rm_emulation.c +++ b/kernel/gsp_rm_emulation.c @@ -737,11 +737,15 @@ static int gsp_rm_send_flags(struct gsp_emu_context *ctx, u32 function, return ret; } - /* Notify the guest (MSI-X vector 0). The driver's bottom-half drains - * events under the GPU lock; the rpcRecvPoll poller holds the same - * lock from send to poll, so a reply can't be consumed by the event - * drain while a poller waits for it (same as real GSP-RM). */ - gsp_emu_inject_completion_interrupt(ctx, rm->stat_seq); + /* Notify the guest. An event must also raise the GSP engine interrupt + * (falcon SWGEN0 + CPU_INTR leaf/top) so the guest's ISR drains the + * status queue and nv_post_event() wakes a client blocked in poll() on + * /dev/nvidia0 (e.g. a GLX swap). Replies only need the MSI-X ping + * because the client polls the queue for them. */ + if (function == GSPRM_RPC_EVENT_POST_EVENT) + gsp_emu_raise_gsp_event_irq(ctx); + else + gsp_emu_inject_completion_interrupt(ctx, rm->stat_seq); mutex_unlock(&rm->stat_lock); return 0; |