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      1 /******************************************************************************
      2  * nmi.h
      3  *
      4  * NMI callback registration and reason codes.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a copy
      7  * of this software and associated documentation files (the "Software"), to
      8  * deal in the Software without restriction, including without limitation the
      9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
     10  * sell copies of the Software, and to permit persons to whom the Software is
     11  * furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     22  * DEALINGS IN THE SOFTWARE.
     23  *
     24  * Copyright (c) 2005, Keir Fraser <keir (at) xensource.com>
     25  */
     26 
     27 #ifndef __XEN_PUBLIC_NMI_H__
     28 #define __XEN_PUBLIC_NMI_H__
     29 
     30 #include "xen.h"
     31 
     32 /*
     33  * NMI reason codes:
     34  * Currently these are x86-specific, stored in arch_shared_info.nmi_reason.
     35  */
     36  /* I/O-check error reported via ISA port 0x61, bit 6. */
     37 #define _XEN_NMIREASON_io_error     0
     38 #define XEN_NMIREASON_io_error      (1UL << _XEN_NMIREASON_io_error)
     39  /* PCI SERR reported via ISA port 0x61, bit 7. */
     40 #define _XEN_NMIREASON_pci_serr     1
     41 #define XEN_NMIREASON_pci_serr      (1UL << _XEN_NMIREASON_pci_serr)
     42 #if __XEN_INTERFACE_VERSION__ < 0x00040300 /* legacy alias of the above */
     43  /* Parity error reported via ISA port 0x61, bit 7. */
     44 #define _XEN_NMIREASON_parity_error 1
     45 #define XEN_NMIREASON_parity_error  (1UL << _XEN_NMIREASON_parity_error)
     46 #endif
     47  /* Unknown hardware-generated NMI. */
     48 #define _XEN_NMIREASON_unknown      2
     49 #define XEN_NMIREASON_unknown       (1UL << _XEN_NMIREASON_unknown)
     50 
     51 /*
     52  * long nmi_op(unsigned int cmd, void *arg)
     53  * NB. All ops return zero on success, else a negative error code.
     54  */
     55 
     56 /*
     57  * Register NMI callback for this (calling) VCPU. Currently this only makes
     58  * sense for domain 0, vcpu 0. All other callers will be returned EINVAL.
     59  * arg == pointer to xennmi_callback structure.
     60  */
     61 #define XENNMI_register_callback   0
     62 struct xennmi_callback {
     63     unsigned long handler_address;
     64     unsigned long pad;
     65 };
     66 typedef struct xennmi_callback xennmi_callback_t;
     67 DEFINE_XEN_GUEST_HANDLE(xennmi_callback_t);
     68 
     69 /*
     70  * Deregister NMI callback for this (calling) VCPU.
     71  * arg == NULL.
     72  */
     73 #define XENNMI_unregister_callback 1
     74 
     75 #endif /* __XEN_PUBLIC_NMI_H__ */
     76 
     77 /*
     78  * Local variables:
     79  * mode: C
     80  * c-file-style: "BSD"
     81  * c-basic-offset: 4
     82  * tab-width: 4
     83  * indent-tabs-mode: nil
     84  * End:
     85  */
     86