1 /* SPDX-License-Identifier: MIT */ 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 40 struct xennmi_callback { 41 unsigned long handler_address; 42 unsigned long pad; 43 }; 44 DEFINE_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