1 /* SPDX-License-Identifier: MIT */ 1 /* SPDX-License-Identifier: MIT */
2 /********************************************* 2 /******************************************************************************
3 * nmi.h 3 * nmi.h
4 * 4 *
5 * NMI callback registration and reason codes. 5 * NMI callback registration and reason codes.
6 * 6 *
7 * Copyright (c) 2005, Keir Fraser <keir@xenso 7 * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
8 */ 8 */
9 9
10 #ifndef __XEN_PUBLIC_NMI_H__ 10 #ifndef __XEN_PUBLIC_NMI_H__
11 #define __XEN_PUBLIC_NMI_H__ 11 #define __XEN_PUBLIC_NMI_H__
12 12
13 #include <xen/interface/xen.h> 13 #include <xen/interface/xen.h>
14 14
15 /* 15 /*
16 * NMI reason codes: 16 * NMI reason codes:
17 * Currently these are x86-specific, stored in 17 * Currently these are x86-specific, stored in arch_shared_info.nmi_reason.
18 */ 18 */
19 /* I/O-check error reported via ISA port 0x61 19 /* I/O-check error reported via ISA port 0x61, bit 6. */
20 #define _XEN_NMIREASON_io_error 0 20 #define _XEN_NMIREASON_io_error 0
21 #define XEN_NMIREASON_io_error (1UL << _X 21 #define XEN_NMIREASON_io_error (1UL << _XEN_NMIREASON_io_error)
22 /* PCI SERR reported via ISA port 0x61, bit 7 22 /* PCI SERR reported via ISA port 0x61, bit 7. */
23 #define _XEN_NMIREASON_pci_serr 1 23 #define _XEN_NMIREASON_pci_serr 1
24 #define XEN_NMIREASON_pci_serr (1UL << _X 24 #define XEN_NMIREASON_pci_serr (1UL << _XEN_NMIREASON_pci_serr)
25 /* Unknown hardware-generated NMI. */ 25 /* Unknown hardware-generated NMI. */
26 #define _XEN_NMIREASON_unknown 2 26 #define _XEN_NMIREASON_unknown 2
27 #define XEN_NMIREASON_unknown (1UL << _X 27 #define XEN_NMIREASON_unknown (1UL << _XEN_NMIREASON_unknown)
28 28
29 /* 29 /*
30 * long nmi_op(unsigned int cmd, void *arg) 30 * long nmi_op(unsigned int cmd, void *arg)
31 * NB. All ops return zero on success, else a 31 * NB. All ops return zero on success, else a negative error code.
32 */ 32 */
33 33
34 /* 34 /*
35 * Register NMI callback for this (calling) VC 35 * Register NMI callback for this (calling) VCPU. Currently this only makes
36 * sense for domain 0, vcpu 0. All other calle 36 * sense for domain 0, vcpu 0. All other callers will be returned EINVAL.
37 * arg == pointer to xennmi_callback structure 37 * arg == pointer to xennmi_callback structure.
38 */ 38 */
39 #define XENNMI_register_callback 0 39 #define XENNMI_register_callback 0
40 struct xennmi_callback { 40 struct xennmi_callback {
41 unsigned long handler_address; 41 unsigned long handler_address;
42 unsigned long pad; 42 unsigned long pad;
43 }; 43 };
44 DEFINE_GUEST_HANDLE_STRUCT(xennmi_callback); 44 DEFINE_GUEST_HANDLE_STRUCT(xennmi_callback);
45 45
46 /* 46 /*
47 * Deregister NMI callback for this (calling) 47 * Deregister NMI callback for this (calling) VCPU.
48 * arg == NULL. 48 * arg == NULL.
49 */ 49 */
50 #define XENNMI_unregister_callback 1 50 #define XENNMI_unregister_callback 1
51 51
52 #endif /* __XEN_PUBLIC_NMI_H__ */ 52 #endif /* __XEN_PUBLIC_NMI_H__ */
53 53
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