10597 would like a way to set NMI behavior at boot
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Andy Fiddaman <andy@omniosce.org>

*** 21,31 ****
  /*
   * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2017 by Delphix. All rights reserved.
   */
  /*
!  * Copyright 2018 Joyent, Inc.
   */
  
  #ifndef _SYS_APIC_COMMON_H
  #define _SYS_APIC_COMMON_H
  
--- 21,31 ----
  /*
   * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2017 by Delphix. All rights reserved.
   */
  /*
!  * Copyright 2019, Joyent, Inc.
   */
  
  #ifndef _SYS_APIC_COMMON_H
  #define _SYS_APIC_COMMON_H
  
*** 153,163 ****
  extern lock_t   apic_nmi_lock;
  /* use to make sure only one cpu handles the error interrupt */
  extern lock_t   apic_error_lock;
  
  /* Patchable global variables. */
- extern int      apic_kmdb_on_nmi;       /* 0 - no, 1 - yes enter kmdb */
  extern uint32_t apic_divide_reg_init;   /* 0 - divide by 2 */
  
  extern apic_intrmap_ops_t *apic_vt_ops;
  
  #ifdef  DEBUG
--- 153,162 ----
*** 200,209 ****
--- 199,217 ----
  extern int      apic_msix_enable;
  
  extern uint32_t apic_get_localapicid(uint32_t cpuid);
  extern uchar_t apic_get_ioapicid(uchar_t ioapicindex);
  
+ typedef enum nmi_action {
+         NMI_ACTION_UNSET,
+         NMI_ACTION_PANIC,
+         NMI_ACTION_IGNORE,
+         NMI_ACTION_KMDB
+ } nmi_action_t;
+ 
+ extern nmi_action_t nmi_action;
+ 
  #ifdef  __cplusplus
  }
  #endif
  
  #endif  /* _SYS_APIC_COMMON_H */