1 files changed, 58 insertions, 0 deletions
diff --git a/tools/guest-diag/wall2/runbook.py b/tools/guest-diag/wall2/runbook.py
new file mode 100644
index 0000000..256d255
--- /dev/null
+++ b/tools/guest-diag/wall2/runbook.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python3
+# runbook.py - watch for the GR0 channel ring registration, hand the pair to
+# sema_pdb_discover, then (after the pdb anchor) issue bounded
+# sema_chan_rewind calls so entries skipped before the anchor re-decode.
+import re, subprocess, sys, time
+
+PDB = "/sys/module/vgsp/parameters/sema_pdb_discover"
+REW = "/sys/module/vgsp/parameters/sema_chan_rewind"
+
+def dmesg_tail(n=150):
+    out = subprocess.run(["sudo", "dmesg"], capture_output=True).stdout.decode(errors="ignore")
+    return out.splitlines()[-n:]
+
+def main():
+    dur = float(sys.argv[1]) if len(sys.argv) > 1 else 180
+    end = time.time() + dur
+    fired = set()
+    rewinds = {}
+    print("# runbook start (%.0fs)" % dur, flush=True)
+    while time.time() < end:
+        for ln in dmesg_tail():
+            m = re.search(r"sema-chan: h=0x([0-9a-f]+) eng=\d+ cid=\d+ gpfifo=0x([0-9a-f]+) ent=\d+ userd=0x[0-9a-f]+ as=\d+ put=\d+ get=\d+ ring rc=0 pa=0x([0-9a-f]+)", ln)
+            if not m:
+                continue
+            h = int(m.group(1), 16)
+            gv = int(m.group(2), 16)
+            rp = int(m.group(3), 16)
+            key = (h, gv, rp)
+            if key in fired:
+                # after the anchor has had time to land, rewind this channel
+                if h == 0xbeec0100:
+                    t0 = rewinds.setdefault(key, time.time())
+                    n = int((time.time() - t0) // 8)
+                    done = rewinds.get(("done", key), 0)
+                    if n > done:
+                        subprocess.run(["sudo", "sh", "-c",
+                                        "echo all > %s" % REW], capture_output=True)
+                        rewinds[("done", key)] = n
+                        print("[%s] REWIND all (h=0x%x, n=%d)" % (
+                            time.strftime("%H:%M:%S"), h, n), flush=True)
+                continue
+            fired.add(key)
+            r = subprocess.run(["sudo", "sh", "-c",
+                                "echo 0x%x,0x%x > %s" % (gv, rp, PDB)],
+                               capture_output=True)
+            print("[%s] TRIGGER h=0x%x va=0x%x pa=0x%x rc=%d" % (
+                time.strftime("%H:%M:%S"), h, gv, rp, r.returncode), flush=True)
+        # report decodes/releases
+        out = subprocess.run(["sudo", "dmesg"], capture_output=True).stdout.decode(errors="ignore")
+        for ln in out.splitlines()[-8:]:
+            if ("sema-push: h=0xbeec0100" in ln and "have_rel=1" in ln) or \
+               "registered after verified" in ln or "rewind" in ln or \
+               ("sema-push: h=0xbeec0100" in ln and "len=1432" in ln):
+                print("LOG %s" % ln.strip()[-170:], flush=True)
+        time.sleep(0.4)
+    print("# runbook end", flush=True)
+
+main()