LXR linux/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
  40struct xennmi_callback {
  41    unsigned long handler_address;
  42    unsigned long pad;
  43};
  44DEFINE_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__ */
  53