meta-ibm: systemd: Enable hardware watchdog
The hardware watchdog config was disabled with commit [1] because the
fan-watchdog.bb in meta-ibm uses the /dev/watchdog already, which
according to the kernel documentation[2] it's the same device as
/dev/watchdog0.
```
[1]: https://gerrit.openbmc.org/c/openbmc/openbmc/+/60829
[2]: https://www.kernel.org/doc/Documentation/watchdog/watchdog-kernel-api.txt
```
Update the hardware watchdog config to use the currently unused
watchdog1 device to be able to recover from systemd hangs.
Verified that all IBM and OpenPower device trees contain a wdt2 device.
Tested:
- With the change, the BMC reboots after 2 min from injecting a systemd
error:
Mar 09 20:53:30 witherspoon systemd[1]: Caught <ILL> from PID 552.
Mar 09 20:53:30 witherspoon systemd-coredump[562]: Due to PID 1 having
crashed coredump collection will now be turned off.
Mar 09 20:54:25 witherspoon kernel: watchdog: watchdog1: watchdog did
not stop!
Mar 09 20:54:22 witherspoon systemd[1]: Freezing execution.
Mar 09 20:55:57 witherspoon systemd-journald[132]: Failed to send
WATCHDOG=1 notification message: Connection refused
client_loop: send disconnect: Broken pipe
- Without the change, the BMC just hangs, it stops pinging, and never
reboots:
Mar 09 21:07:23 witherspoon systemd[1]: Caught <ILL> from PID 433.
Mar 09 21:07:24 witherspoon systemd-coredump[687]: Due to PID 1 having
crashed coredump collection will now be turned off.
Mar 09 21:08:07 witherspoon systemd[1]: Freezing execution.
Mar 09 21:08:41 witherspoon systemd-journald[120]: Failed to send
WATCHDOG=1 notification message: Connection refused
Mar 09 21:10:11 witherspoon systemd-journald[120]: Failed to send
WATCHDOG=1 notification message: Transport endpoint is not connected
Mar 09 21:11:41 witherspoon systemd-journald[120]: Failed to send
WATCHDOG=1 notification message: Transport endpoint is not connected
Mar 09 21:13:12 witherspoon systemd-journald[120]: Failed to send
WATCHDOG=1 notification message: Transport endpoint is not connected
Change-Id: I7850d23805c1cb5c0b84cac4add28df16fe648f5
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-ibm/recipes-core/systemd/systemd/40-hardware-watchdog.conf b/meta-ibm/recipes-core/systemd/systemd/40-hardware-watchdog.conf
index 42ca55e..f737358 100644
--- a/meta-ibm/recipes-core/systemd/systemd/40-hardware-watchdog.conf
+++ b/meta-ibm/recipes-core/systemd/systemd/40-hardware-watchdog.conf
@@ -1,3 +1,3 @@
[Manager]
-#RuntimeWatchdogSec=120s
-#WatchdogDevice=/dev/watchdog
+RuntimeWatchdogSec=120s
+WatchdogDevice=/dev/watchdog1