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