x86/platform/UV: Add basic CPU NMI health check
Add a low impact health check triggered by the system NMI command that essentially checks which CPUs are responding to external NMI's. Signed-off-by: NMike Travis <travis@sgi.com> Reviewed-by: NRuss Anderson <rja@hpe.com> Reviewed-by: NAlex Thorlton <athorlton@sgi.com> Acked-by: NThomas Gleixner <tglx@linutronix.de> Acked-by: NDimitri Sivanich <sivanich@hpe.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20170125163517.756690240@asylum.americas.sgi.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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