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Change NMI processing so that if watchdog=force is passed on the command-line and the NMI is not caused by a perf counter overflow (i.e. likely not a watchdog "tick"), the NMI is handled by the unknown NMI handler. This allows injection of NMIs from IPMI controllers that don't set the IOCK/SERR bits to trigger the unknown NMI handler rather than be ignored. Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> Fix command line parsing (don't enable the watchdog on e.g. "watchdog=xyz"). Signed-off-by: Jan Beulich <jbeulich@suse.com>