From 06a424b52bf345cd463a2a41d1ac8213df987c02 Mon Sep 17 00:00:00 2001
From: Arthur Hanson Rasmusson <arthur@vgpu.io>
Date: Wed, 30 Sep 2026 05:58:38 -0400
Subject: 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.
---
 tools/guest-diag/run_cycle.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'tools/guest-diag')

diff --git a/tools/guest-diag/run_cycle.sh b/tools/guest-diag/run_cycle.sh
index 3f5289a..c3f4ffa 100755
--- a/tools/guest-diag/run_cycle.sh
+++ b/tools/guest-diag/run_cycle.sh
@@ -28,11 +28,13 @@ for i in $(seq 1 24); do
     sleep 5
 done
 
-echo "[*] setting module params (SKIP_OPS=${SKIP_OPS:-Y}, OPS_LOG=${OPS_LOG:-8}, COPY_WATCH=${COPY_WATCH:-0})"
+echo "[*] setting module params (SKIP_OPS=${SKIP_OPS:-Y}, OPS_LOG=${OPS_LOG:-8}, COPY_WATCH=${COPY_WATCH:-0}, COPY_PAT=${COPY_PAT:-0}, CE_GRACE=${CE_GRACE:-8000})"
 SKIP_OPS="${SKIP_OPS:-Y}"
 OPS_LOG="${OPS_LOG:-8}"
 COPY_WATCH="${COPY_WATCH:-0}"
-sudo sh -c "echo Y > /sys/module/open_iov_vfio/parameters/sema_fake_rel; echo $SKIP_OPS > /sys/module/open_iov_vfio/parameters/sema_skip_ops; echo $OPS_LOG > /sys/module/open_iov_vfio/parameters/sema_ops_log; echo $COPY_WATCH > /sys/module/open_iov_vfio/parameters/sema_copy_watch"
+COPY_PAT="${COPY_PAT:-0}"
+CE_GRACE="${CE_GRACE:-8000}"
+sudo sh -c "echo Y > /sys/module/open_iov_vfio/parameters/sema_fake_rel; echo $SKIP_OPS > /sys/module/open_iov_vfio/parameters/sema_skip_ops; echo $OPS_LOG > /sys/module/open_iov_vfio/parameters/sema_ops_log; echo $COPY_WATCH > /sys/module/open_iov_vfio/parameters/sema_copy_watch; echo $COPY_PAT > /sys/module/open_iov_vfio/parameters/sema_copy_pat; echo $CE_GRACE > /sys/module/open_iov_vfio/parameters/sema_ce_grace_ms"
 
 echo "[*] pushing guest tools"
 timeout 300 "$HERE/push_guest_tools.sh" >/dev/null 2>&1 || { echo "push failed"; exit 1; }
-- 
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