hw/misc/pvpanic-pci.c

   1 /*
   2  * QEMU simulated PCI pvpanic device.
   3  *
   4  * Copyright (C) 2020 Oracle
   5  *
   6  * Authors:
   7  *     Mihai Carabas <mihai.carabas@oracle.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qemu/module.h"
  16 #include "sysemu/runstate.h"
  17
  18 #include "hw/nvram/fw_cfg.h"
  19 #include "hw/qdev-properties.h"
  20 #include "migration/vmstate.h"
  21 #include "hw/misc/pvpanic.h"
  22 #include "qom/object.h"
  23 #include "hw/pci/pci.h"
  24 #include "standard-headers/linux/pvpanic.h"
  25
  26 OBJECT_DECLARE_SIMPLE_TYPE(PVPanicPCIState, PVPANIC_PCI_DEVICE)
  27
  28 /*
  29  * PVPanicPCIState for PCI device
  30  */
  31 typedef struct PVPanicPCIState {
  32     PCIDevice dev;
  33     PVPanicState pvpanic;
  34 } PVPanicPCIState;
  35
  36 static const VMStateDescription vmstate_pvpanic_pci = {
  37     .name = "pvpanic-pci",
  38     .version_id = 1,
  39     .minimum_version_id = 1,
  40     .fields = (VMStateField[]) {
  41         VMSTATE_PCI_DEVICE(dev, PVPanicPCIState),
  42         VMSTATE_END_OF_LIST()
  43     }
  44 };
  45
  46 static void pvpanic_pci_realizefn(PCIDevice *dev, Error **errp)
  47 {
  48     PVPanicPCIState *s = PVPANIC_PCI_DEVICE(dev);
  49     PVPanicState *ps = &s->pvpanic;
  50
  51     pvpanic_setup_io(&s->pvpanic, DEVICE(s), 2);
  52
  53     pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &ps->mr);
  54 }
  55
  56 static Property pvpanic_pci_properties[] = {
  57     DEFINE_PROP_UINT8("events", PVPanicPCIState, pvpanic.events,
  58                       PVPANIC_PANICKED | PVPANIC_CRASH_LOADED),
  59     DEFINE_PROP_END_OF_LIST(),
  60 };
  61
  62 static void pvpanic_pci_class_init(ObjectClass *klass, void *data)
  63 {
  64     DeviceClass *dc = DEVICE_CLASS(klass);
  65     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
  66
  67     device_class_set_props(dc, pvpanic_pci_properties);
  68
  69     pc->realize = pvpanic_pci_realizefn;
  70     pc->vendor_id = PCI_VENDOR_ID_REDHAT;
  71     pc->device_id = PCI_DEVICE_ID_REDHAT_PVPANIC;
  72     pc->revision = 1;
  73     pc->class_id = PCI_CLASS_SYSTEM_OTHER;
  74     dc->vmsd = &vmstate_pvpanic_pci;
  75
  76     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  77 }
  78
  79 static const TypeInfo pvpanic_pci_info = {
  80     .name          = TYPE_PVPANIC_PCI_DEVICE,
  81     .parent        = TYPE_PCI_DEVICE,
  82     .instance_size = sizeof(PVPanicPCIState),
  83     .class_init    = pvpanic_pci_class_init,
  84     .interfaces = (InterfaceInfo[]) {
  85         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
  86         { }
  87     }
  88 };
  89
  90 static void pvpanic_register_types(void)
  91 {
  92     type_register_static(&pvpanic_pci_info);
  93 }
  94
  95 type_init(pvpanic_register_types);