Or would kernel's recompiling be needed anyways? Moreover, I'm actually interested in intersection of watchdogs provided by KVM and supported by OpenBSD (as KVM's guest). At least as to KVM's it's gonna be a short list:
1) i6300esb (PCI) 2) ib700 (ISA) Attempt with 1st item shows its driver isn't compiled. Moreover, I've found this in mail list archives: revision 1.411 date: 2005/05/02 17:26:00; author: grange; state: Exp; lines: +2 -1; Add ichwdt(4): Intel 6300ESB ICH watchdog timer driver. Disabled for now due to lack of testing. If you have a machine that uses this device please contact me. Is there no solution of this task in OpenBSD 6.x? -- End of message. Next message?