vgsp-mme: CONT-118 strict release + FE-busy deferral - sema_gl_mme_hold_strict (calls release only when pre_words_out==0 && fe_idle() && live_gen==pl_gen) and sema_gl_mme_fe_defer (busy-defer the load-only carrier at svc_gr_request before fill/consume, bounded 4 consecutive defers/gen with GIVEUP log) - both default 1, independent live A/B, 0 = legacy-equivalent

1 files changed, 20 insertions, 0 deletions

diff --git a/kernel/gsp_sema_service.c b/kernel/gsp_sema_service.c
index 532f89d..64139f0 100644
--- a/kernel/gsp_sema_service.c
+++ b/kernel/gsp_sema_service.c
@@ -34201,6 +34201,26 @@ static bool svc_gr_request(struct nv_vgpu_device *vgpu,
 		return false;
 	}
 	/*
+	 * r1445 5c: submit-side FE-busy deferral of the load-only carrier.
+	 * A 0 return from the launch builder cannot express this (it is the
+	 * block length and a zero-length block is never publishable), so the
+	 * gate lives here, the same busy-defer shape as the prelude gate
+	 * above: nothing is emitted or submitted, no release is authored,
+	 * the candidate survives and the pump re-offers it. The predicate
+	 * (gsp_phys_gr_mme_fe_defer_wanted) is the builder's own load-only
+	 * decision plus the 0x400504 FE-idle read, bounded per generation so
+	 * a never-idle FE falls back to the historical carrier.
+	 */
+	if (svc_gr_cand.stream_3d &&
+	    gsp_phys_gr_mme_fe_defer_wanted(ch->h_object,
+					    svc_gr_cand.stream_n)) {
+		clear_bit_unlock(SVC_FWD_INFLIGHT, &svc_fwd_state);
+		mutex_unlock(&svc_fwd_lock);
+		svc_gr_busy_defer = true;
+		svc.fwd_gr_refused++;
+		return false;
+	}
+	/*
 	 * SESSION 153-CONTINUED-62: the gate's fail-open edge (see
 	 * gsp_sema_mme_immature_skip). Past the gate window a beef window
 	 * whose macro program is STILL missing must not be forwarded - the