sema-svc: run CE work before its release, grace unreadable CE entries, payload-pattern audit

- CE LAUNCH_DMA releases are now applied after the push's collected work
  runs: the client reads copied data as soon as it observes the release,
  so release-first let cuMemcpyDtoH observe a copy that had not executed.
- Unreadable CE entries stay pending for a grace window (sema_ce_grace_ms,
  default 8s) before the release fallback consumes them, so a translation
  that lands within a service pass lets the push be decoded and its work
  executed instead of being dropped.
- sema_copy_pat matches an 8-byte value against every copy's src/dst first
  word and scans decoded pushes for it, naming the submission that carries
  a known payload regardless of size/encoding.
- sema-dma-skip logs transfer-shaped launches that collect no op; op log
  lines carry the channel handle; LAUNCH_DMA inventory follows OPS_LOG.
- A real release application now records the release VA, so decoded pushes
  no longer trigger a spurious fake release.

1 files changed, 19 insertions, 0 deletions

diff --git a/kernel/main.c b/kernel/main.c
index efa4bf7..7fe2d15 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -2466,6 +2466,25 @@ module_param_named(sema_copy_watch, gsp_sema_copy_watch, uint, 0644);
 MODULE_PARM_DESC(sema_copy_watch, "Copy size whose first bytes are logged (default 0)");
 
 /*
+ * Data-path watch: 8-byte value matched against every CE copy's first source
+ * and destination words, and scanned for inside every decoded push, so the
+ * submission carrying a known payload is named even when its size/encoding is
+ * unknown:
+ *   echo 0x0000000400000001 > .../parameters/sema_copy_pat
+ */
+module_param_named(sema_copy_pat, gsp_sema_copy_pat, ullong, 0644);
+MODULE_PARM_DESC(sema_copy_pat, "8-byte pattern matched in copy src/dst and pushes (default 0)");
+
+/*
+ * Grace window (ms) an untranslatable CE entry stays pending before the
+ * fallback acknowledges its release and consumes it. Its work must run before
+ * the release the client synchronizes on; the translation usually lands within
+ * a service pass.
+ */
+module_param_named(sema_ce_grace_ms, gsp_sema_ce_grace_ms, uint, 0644);
+MODULE_PARM_DESC(sema_ce_grace_ms, "CE pending-entry grace window in ms (default 8000)");
+
+/*
  * Grace window (ms) an untranslatable GR entry stays pending before the pump
  * consumes it as stale, so a late push-buffer pin can still make it readable.
  */