| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 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__ */ |