1/******************************************************************************
2 * nmi.h
3 *
4 * NMI callback registration and reason codes.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
25 */
26
27#ifndef __XEN_PUBLIC_NMI_H__
28#define __XEN_PUBLIC_NMI_H__
29
30#include "xen.h"
31
32/*
33 * NMI reason codes:
34 * Currently these are x86-specific, stored in arch_shared_info.nmi_reason.
35 */
36 /* I/O-check error reported via ISA port 0x61, bit 6. */
37#define _XEN_NMIREASON_io_error     0
38#define XEN_NMIREASON_io_error      (1UL << _XEN_NMIREASON_io_error)
39 /* PCI SERR reported via ISA port 0x61, bit 7. */
40#define _XEN_NMIREASON_pci_serr     1
41#define XEN_NMIREASON_pci_serr      (1UL << _XEN_NMIREASON_pci_serr)
42#if __XEN_INTERFACE_VERSION__ < 0x00040300 /* legacy alias of the above */
43 /* Parity error reported via ISA port 0x61, bit 7. */
44#define _XEN_NMIREASON_parity_error 1
45#define XEN_NMIREASON_parity_error  (1UL << _XEN_NMIREASON_parity_error)
46#endif
47 /* Unknown hardware-generated NMI. */
48#define _XEN_NMIREASON_unknown      2
49#define XEN_NMIREASON_unknown       (1UL << _XEN_NMIREASON_unknown)
50
51/*
52 * long nmi_op(unsigned int cmd, void *arg)
53 * NB. All ops return zero on success, else a negative error code.
54 */
55
56/*
57 * Register NMI callback for this (calling) VCPU. Currently this only makes
58 * sense for domain 0, vcpu 0. All other callers will be returned EINVAL.
59 * arg == pointer to xennmi_callback structure.
60 */
61#define XENNMI_register_callback   0
62struct xennmi_callback {
63    unsigned long handler_address;
64    unsigned long pad;
65};
66typedef struct xennmi_callback xennmi_callback_t;
67DEFINE_XEN_GUEST_HANDLE(xennmi_callback_t);
68
69/*
70 * Deregister NMI callback for this (calling) VCPU.
71 * arg == NULL.
72 */
73#define XENNMI_unregister_callback 1
74
75#endif /* __XEN_PUBLIC_NMI_H__ */
76
77/*
78 * Local variables:
79 * mode: C
80 * c-file-style: "BSD"
81 * c-basic-offset: 4
82 * tab-width: 4
83 * indent-tabs-mode: nil
84 * End:
85 */
86