1 /* 2 * QEMU simulated pvpanic device. 3 * 4 * Copyright Fujitsu, Corp. 2013 5 * 6 * Authors: 7 * Wen Congyang <wency@cn.fujitsu.com> 8 * Hu Tao <hutao@cn.fujitsu.com> 9 * 10 * This work is licensed under the terms of the GNU GPL, version 2 or later. 11 * See the COPYING file in the top-level directory. 12 * 13 */ 14 15 #include "qemu/osdep.h" 16 #include "qemu/log.h" 17 #include "qemu/module.h" 18 #include "sysemu/runstate.h" 19 20 #include "hw/nvram/fw_cfg.h" 21 #include "hw/qdev-properties.h" 22 #include "hw/misc/pvpanic.h" 23 #include "qom/object.h" 24 25 static void handle_event(int event) 26 { 27 static bool logged; 28 29 if (event & ~(PVPANIC_PANICKED | PVPANIC_CRASHLOADED) && !logged) { 30 qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event); 31 logged = true; 32 } 33 34 if (event & PVPANIC_PANICKED) { 35 qemu_system_guest_panicked(NULL); 36 return; 37 } 38 39 if (event & PVPANIC_CRASHLOADED) { 40 qemu_system_guest_crashloaded(NULL); 41 return; 42 } 43 } 44 45 /* return supported events on read */ 46 static uint64_t pvpanic_read(void *opaque, hwaddr addr, unsigned size) 47 { 48 PVPanicState *pvp = opaque; 49 return pvp->events; 50 } 51 52 static void pvpanic_write(void *opaque, hwaddr addr, uint64_t val, 53 unsigned size) 54 { 55 handle_event(val); 56 } 57 58 static const MemoryRegionOps pvpanic_ops = { 59 .read = pvpanic_read, 60 .write = pvpanic_write, 61 .impl = { 62 .min_access_size = 1, 63 .max_access_size = 1, 64 }, 65 }; 66 67 void pvpanic_setup_io(PVPanicState *s, DeviceState *dev, unsigned size) 68 { 69 memory_region_init_io(&s->mr, OBJECT(dev), &pvpanic_ops, s, "pvpanic", size); 70 } 71