include/xen/interface/nmi.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /******************************************************************************
   3  * nmi.h
   4  *
   5  * NMI callback registration and reason codes.
   6  *
   7  * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
   8  */
   9
  10 #ifndef __XEN_PUBLIC_NMI_H__
  11 #define __XEN_PUBLIC_NMI_H__
  12
  13 #include <xen/interface/xen.h>
  14
  15 /*
  16  * NMI reason codes:
  17  * Currently these are x86-specific, stored in arch_shared_info.nmi_reason.
  18  */
  19  /* I/O-check error reported via ISA port 0x61, bit 6. */
  20 #define _XEN_NMIREASON_io_error     0
  21 #define XEN_NMIREASON_io_error      (1UL << _XEN_NMIREASON_io_error)
  22  /* PCI SERR reported via ISA port 0x61, bit 7. */
  23 #define _XEN_NMIREASON_pci_serr     1
  24 #define XEN_NMIREASON_pci_serr      (1UL << _XEN_NMIREASON_pci_serr)
  25  /* Unknown hardware-generated NMI. */
  26 #define _XEN_NMIREASON_unknown      2
  27 #define XEN_NMIREASON_unknown       (1UL << _XEN_NMIREASON_unknown)
  28
  29 /*
  30  * long nmi_op(unsigned int cmd, void *arg)
  31  * NB. All ops return zero on success, else a negative error code.
  32  */
  33
  34 /*
  35  * Register NMI callback for this (calling) VCPU. Currently this only makes
  36  * sense for domain 0, vcpu 0. All other callers will be returned EINVAL.
  37  * arg == pointer to xennmi_callback structure.
  38  */
  39 #define XENNMI_register_callback   0
  40 struct xennmi_callback {
  41     unsigned long handler_address;
  42     unsigned long pad;
  43 };
  44 DEFINE_GUEST_HANDLE_STRUCT(xennmi_callback);
  45
  46 /*
  47  * Deregister NMI callback for this (calling) VCPU.
  48  * arg == NULL.
  49  */
  50 #define XENNMI_unregister_callback 1
  51
  52 #endif /* __XEN_PUBLIC_NMI_H__ */