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/* SPDX-License-Identifier: GPL-2.0 */
/******************************************************************************
* nmi.h
*
* NMI callback registration and reason codes.
*
* Copyright (c) 2005, Keir Fraser <keir@xensource.com>
*/
#ifndef __XEN_PUBLIC_NMI_H__
#define __XEN_PUBLIC_NMI_H__
#include <xen/interface/xen.h>
/*
* NMI reason codes:
* Currently these are x86-specific, stored in arch_shared_info.nmi_reason.
*/
/* I/O-check error reported via ISA port 0x61, bit 6. */
#define _XEN_NMIREASON_io_error 0
#define XEN_NMIREASON_io_error (1UL << _XEN_NMIREASON_io_error)
/* PCI SERR reported via ISA port 0x61, bit 7. */
#define _XEN_NMIREASON_pci_serr 1
#define XEN_NMIREASON_pci_serr (1UL << _XEN_NMIREASON_pci_serr)
/* Unknown hardware-generated NMI. */
#define _XEN_NMIREASON_unknown 2
#define XEN_NMIREASON_unknown (1UL << _XEN_NMIREASON_unknown)
/*
* long nmi_op(unsigned int cmd, void *arg)
* NB. All ops return zero on success, else a negative error code.
*/
/*
* Register NMI callback for this (calling) VCPU. Currently this only makes
* sense for domain 0, vcpu 0. All other callers will be returned EINVAL.
* arg == pointer to xennmi_callback structure.
*/
#define XENNMI_register_callback 0
struct xennmi_callback {
unsigned long handler_address;
unsigned long pad;
};
DEFINE_GUEST_HANDLE_STRUCT(xennmi_callback);
/*
* Deregister NMI callback for this (calling) VCPU.
* arg == NULL.
*/
#define XENNMI_unregister_callback 1
#endif /* __XEN_PUBLIC_NMI_H__ */
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