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-rw-r--r--src/hw/misc/pvpanic.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/src/hw/misc/pvpanic.c b/src/hw/misc/pvpanic.c
new file mode 100644
index 0000000..3709488
--- /dev/null
+++ b/src/hw/misc/pvpanic.c
@@ -0,0 +1,143 @@
+/*
+ * QEMU simulated pvpanic device.
+ *
+ * Copyright Fujitsu, Corp. 2013
+ *
+ * Authors:
+ * Wen Congyang <wency@cn.fujitsu.com>
+ * Hu Tao <hutao@cn.fujitsu.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qapi/qmp/qobject.h"
+#include "qapi/qmp/qjson.h"
+#include "sysemu/sysemu.h"
+#include "qemu/log.h"
+
+#include "hw/nvram/fw_cfg.h"
+#include "hw/i386/pc.h"
+#include "qapi-event.h"
+
+/* The bit of supported pv event */
+#define PVPANIC_F_PANICKED 0
+
+/* The pv event value */
+#define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED)
+
+#define TYPE_ISA_PVPANIC_DEVICE "pvpanic"
+#define ISA_PVPANIC_DEVICE(obj) \
+ OBJECT_CHECK(PVPanicState, (obj), TYPE_ISA_PVPANIC_DEVICE)
+
+static void handle_event(int event)
+{
+ static bool logged;
+
+ if (event & ~PVPANIC_PANICKED && !logged) {
+ qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event);
+ logged = true;
+ }
+
+ if (event & PVPANIC_PANICKED) {
+ qemu_system_guest_panicked();
+ return;
+ }
+}
+
+#include "hw/isa/isa.h"
+
+typedef struct PVPanicState {
+ ISADevice parent_obj;
+
+ MemoryRegion io;
+ uint16_t ioport;
+} PVPanicState;
+
+/* return supported events on read */
+static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size)
+{
+ return PVPANIC_PANICKED;
+}
+
+static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned size)
+{
+ handle_event(val);
+}
+
+static const MemoryRegionOps pvpanic_ops = {
+ .read = pvpanic_ioport_read,
+ .write = pvpanic_ioport_write,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 1,
+ },
+};
+
+static void pvpanic_isa_initfn(Object *obj)
+{
+ PVPanicState *s = ISA_PVPANIC_DEVICE(obj);
+
+ memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1);
+}
+
+static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
+{
+ ISADevice *d = ISA_DEVICE(dev);
+ PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
+ FWCfgState *fw_cfg = fw_cfg_find();
+ uint16_t *pvpanic_port;
+
+ if (!fw_cfg) {
+ return;
+ }
+
+ pvpanic_port = g_malloc(sizeof(*pvpanic_port));
+ *pvpanic_port = cpu_to_le16(s->ioport);
+ fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port,
+ sizeof(*pvpanic_port));
+
+ isa_register_ioport(d, &s->io, s->ioport);
+}
+
+#define PVPANIC_IOPORT_PROP "ioport"
+
+uint16_t pvpanic_port(void)
+{
+ Object *o = object_resolve_path_type("", TYPE_ISA_PVPANIC_DEVICE, NULL);
+ if (!o) {
+ return 0;
+ }
+ return object_property_get_int(o, PVPANIC_IOPORT_PROP, NULL);
+}
+
+static Property pvpanic_isa_properties[] = {
+ DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->realize = pvpanic_isa_realizefn;
+ dc->props = pvpanic_isa_properties;
+ set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+}
+
+static TypeInfo pvpanic_isa_info = {
+ .name = TYPE_ISA_PVPANIC_DEVICE,
+ .parent = TYPE_ISA_DEVICE,
+ .instance_size = sizeof(PVPanicState),
+ .instance_init = pvpanic_isa_initfn,
+ .class_init = pvpanic_isa_class_init,
+};
+
+static void pvpanic_register_types(void)
+{
+ type_register_static(&pvpanic_isa_info);
+}
+
+type_init(pvpanic_register_types)
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