include/hw/misc/vmcoreinfo.h

   1 /*
   2  * Virtual Machine coreinfo device
   3  *
   4  * Copyright (C) 2017 Red Hat, Inc.
   5  *
   6  * Authors: Marc-André Lureau <marcandre.lureau@redhat.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  *
  11  */
  12 #ifndef VMCOREINFO_H
  13 #define VMCOREINFO_H
  14
  15 #include "hw/qdev.h"
  16
  17 #define VMCOREINFO_DEVICE "vmcoreinfo"
  18 #define VMCOREINFO(obj) OBJECT_CHECK(VMCoreInfoState, (obj), VMCOREINFO_DEVICE)
  19
  20 #define VMCOREINFO_FORMAT_NONE 0x0
  21 #define VMCOREINFO_FORMAT_ELF 0x1
  22
  23 /* all fields are little-endian */
  24 typedef struct FWCfgVMCoreInfo {
  25     uint16_t host_format; /* set on reset */
  26     uint16_t guest_format;
  27     uint32_t size;
  28     uint64_t paddr;
  29 } QEMU_PACKED FWCfgVMCoreInfo;
  30
  31 typedef struct VMCoreInfoState {
  32     DeviceClass parent_obj;
  33
  34     bool has_vmcoreinfo;
  35     FWCfgVMCoreInfo vmcoreinfo;
  36 } VMCoreInfoState;
  37
  38 /* returns NULL unless there is exactly one device */
  39 static inline VMCoreInfoState *vmcoreinfo_find(void)
  40 {
  41     Object *o = object_resolve_path_type("", VMCOREINFO_DEVICE, NULL);
  42
  43     return o ? VMCOREINFO(o) : NULL;
  44 }
  45
  46 #endif