include/xen/interface/nmi.h

   1 /******************************************************************************
   2  * nmi.h
   3  *
   4  * NMI callback registration and reason codes.
   5  *
   6  * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
   7  */
   8
   9 #ifndef __XEN_PUBLIC_NMI_H__
  10 #define __XEN_PUBLIC_NMI_H__
  11
  12 #include <xen/interface/xen.h>
  13
  14 /*
  15  * NMI reason codes:
  16  * Currently these are x86-specific, stored in arch_shared_info.nmi_reason.
  17  */
  18  /* I/O-check error reported via ISA port 0x61, bit 6. */
  19 #define _XEN_NMIREASON_io_error     0
  20 #define XEN_NMIREASON_io_error      (1UL << _XEN_NMIREASON_io_error)
  21  /* PCI SERR reported via ISA port 0x61, bit 7. */
  22 #define _XEN_NMIREASON_pci_serr     1
  23 #define XEN_NMIREASON_pci_serr      (1UL << _XEN_NMIREASON_pci_serr)
  24  /* Unknown hardware-generated NMI. */
  25 #define _XEN_NMIREASON_unknown      2
  26 #define XEN_NMIREASON_unknown       (1UL << _XEN_NMIREASON_unknown)
  27
  28 /*
  29  * long nmi_op(unsigned int cmd, void *arg)
  30  * NB. All ops return zero on success, else a negative error code.
  31  */
  32
  33 /*
  34  * Register NMI callback for this (calling) VCPU. Currently this only makes
  35  * sense for domain 0, vcpu 0. All other callers will be returned EINVAL.
  36  * arg == pointer to xennmi_callback structure.
  37  */
  38 #define XENNMI_register_callback   0
  39 struct xennmi_callback {
  40     unsigned long handler_address;
  41     unsigned long pad;
  42 };
  43 DEFINE_GUEST_HANDLE_STRUCT(xennmi_callback);
  44
  45 /*
  46  * Deregister NMI callback for this (calling) VCPU.
  47  * arg == NULL.
  48  */
  49 #define XENNMI_unregister_callback 1
  50
  51 #endif /* __XEN_PUBLIC_NMI_H__ */