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#!/usr/bin/env python3
"""
guest_init_monitor.py - Monitor guest kernel initialization for NVIDIA driver
Correlates host tracepoints with guest dmesg/serial output
"""
import sys
import os
import re
import time
import subprocess
import threading
import json
from datetime import datetime
from collections import deque
from pathlib import Path
class GuestInitMonitor:
def __init__(self, guest_serial="/dev/ttyS0", host_trace_pipe="/sys/kernel/debug/tracing/trace_pipe"):
self.guest_serial = guest_serial
self.host_trace_pipe = host_trace_pipe
self.guest_log = deque(maxlen=1000)
self.host_events = deque(maxlen=1000)
self.failure_patterns = self._load_failure_patterns()
self.running = False
def _load_failure_patterns(self):
return {
"pci_probe_fail": [
r"nvidia: probe of .* failed with error -?\d+",
r"pci .*: can't claim BAR \d+",
r"pci .*: BAR \d+: no space for",
],
"gsp_firmware_fail": [
r"GSP.*firmware.*load.*failed",
r"GSP.*bootstrap.*failed",
r"GSP.*RPC.*timeout",
r"nv_gsp_firmware_load.*error",
],
"msix_fail": [
r"MSI-X.*failed",
r"pci_enable_msix.*failed",
r"request_threaded_irq.*failed",
],
"bar_map_fail": [
r"ioremap.*failed",
r"pci_iomap.*failed",
r"BAR.*mapping.*failed",
],
"dma_fail": [
r"dma_map.*failed",
r"IOMMU.*fault",
r"DMAR.*error",
],
"vgpu_vfio_fail": [
r"vGPU VFIO.*failed",
r"nvidia_vgpu_vfio_get_ops.*failed",
r"mdev.*register.*failed",
],
}
def start(self):
self.running = True
self.guest_thread = threading.Thread(target=self._monitor_guest_serial, daemon=True)
self.host_thread = threading.Thread(target=self._monitor_host_traces, daemon=True)
self.guest_thread.start()
self.host_thread.start()
print(f"[{datetime.now()}] Guest init monitor started")
print(f" Guest serial: {self.guest_serial}")
print(f" Host trace pipe: {self.host_trace_pipe}")
def stop(self):
self.running = False
if hasattr(self, 'guest_thread'):
self.guest_thread.join(timeout=2)
if hasattr(self, 'host_thread'):
self.host_thread.join(timeout=2)
print(f"[{datetime.now()}] Guest init monitor stopped")
def _monitor_guest_serial(self):
"""Monitor guest kernel log via serial console"""
try:
# Try to open serial device or use virsh console
proc = subprocess.Popen(
["timeout", "300", "cat", self.guest_serial],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True
)
for line in proc.stdout:
if not self.running:
break
self._process_guest_line(line.strip())
except Exception as e:
print(f"[{datetime.now()}] Guest serial monitor error: {e}")
def _monitor_host_traces(self):
"""Monitor host kernel tracepoints"""
try:
proc = subprocess.Popen(
["cat", self.host_trace_pipe],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True
)
for line in proc.stdout:
if not self.running:
break
self._process_host_trace(line.strip())
except Exception as e:
print(f"[{datetime.now()}] Host trace monitor error: {e}")
def _process_guest_line(self, line):
"""Process a line from guest serial console"""
timestamp = datetime.now().isoformat()
entry = {"timestamp": timestamp, "source": "guest", "line": line}
self.guest_log.append(entry)
# Check for failure patterns
failure = self._classify_failure(line)
if failure:
self._report_failure(failure, line, "guest")
# Print important lines
if any(kw in line.lower() for kw in ["nvidia", "gsp", "vfio", "mdev", "error", "fail", "timeout"]):
print(f"[GUEST] {line}")
def _process_host_trace(self, line):
"""Process a line from host trace_pipe"""
timestamp = datetime.now().isoformat()
entry = {"timestamp": timestamp, "source": "host_trace", "line": line}
self.host_events.append(entry)
# Look for GSP emulation tracepoints
if "gsp_emu" in line:
print(f"[HOST TRACE] {line}")
# Correlate with recent guest logs
self._correlate_events(line)
def _classify_failure(self, line):
"""Classify failure type based on patterns"""
for failure_type, patterns in self.failure_patterns.items():
for pattern in patterns:
if re.search(pattern, line, re.IGNORECASE):
return failure_type
return None
def _report_failure(self, failure_type, line, source):
"""Report a detected failure"""
report = {
"timestamp": datetime.now().isoformat(),
"failure_type": failure_type,
"source": source,
"line": line,
"recent_guest_logs": list(self.guest_log)[-20:],
"recent_host_events": list(self.host_events)[-20:],
}
print(f"\n{'='*60}")
print(f"FAILURE DETECTED: {failure_type}")
print(f"Source: {source}")
print(f"Line: {line}")
print(f"{'='*60}\n")
# Save failure report
report_dir = Path("/tmp/gsp_emu_failures")
report_dir.mkdir(exist_ok=True)
report_file = report_dir / f"failure_{datetime.now().strftime('%Y%m%d_%H%M%S')}.json"
with open(report_file, 'w') as f:
json.dump(report, f, indent=2)
print(f"Failure report saved: {report_file}")
def _correlate_events(self, host_event):
"""Correlate host tracepoint with recent guest activity"""
# Look for matching sequence IDs, RPC types, etc.
pass
def get_summary(self):
"""Get monitoring summary"""
return {
"guest_log_entries": len(self.guest_log),
"host_events": len(self.host_events),
"recent_guest": list(self.guest_log)[-10:],
"recent_host": list(self.host_events)[-10:],
}
def main():
import argparse
parser = argparse.ArgumentParser(description="Monitor guest NVIDIA driver initialization")
parser.add_argument("--guest-serial", default="/dev/ttyS0", help="Guest serial device")
parser.add_argument("--host-trace", default="/sys/kernel/debug/tracing/trace_pipe", help="Host trace pipe")
parser.add_argument("--duration", type=int, default=300, help="Monitor duration (seconds)")
args = parser.parse_args()
monitor = GuestInitMonitor(args.guest_serial, args.host_trace)
monitor.start()
try:
time.sleep(args.duration)
except KeyboardInterrupt:
pass
finally:
monitor.stop()
summary = monitor.get_summary()
print(json.dumps(summary, indent=2))
if __name__ == "__main__":
main()
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