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
62 struct xennmi_callback {
63     unsigned long handler_address;
64     unsigned long pad;
65 };
66 typedef struct xennmi_callback xennmi_callback_t;
67 DEFINE_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