| 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 "system/runstate.h" |
| 19 | |
| 20 | #include "hw/nvram/fw_cfg.h" |
| 21 | #include "hw/core/qdev-properties.h" |
| 22 | #include "hw/misc/pvpanic.h" |
| 23 | #include "qom/object.h" |
| 24 | #include "standard-headers/misc/pvpanic.h" |
| 25 | |
| 26 | static void handle_event(int event) |
| 27 | { |
| 28 | static bool logged; |
| 29 | |
| 30 | if (event & ~PVPANIC_EVENTS && !logged) { |
| 31 | qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event); |
| 32 | logged = true; |
| 33 | } |
| 34 | |
| 35 | if (event & PVPANIC_PANICKED) { |
| 36 | qemu_system_guest_panicked(NULL); |
| 37 | return; |
| 38 | } |
| 39 | |
| 40 | if (event & PVPANIC_CRASH_LOADED) { |
| 41 | qemu_system_guest_crashloaded(NULL); |
| 42 | return; |
| 43 | } |
| 44 | |
| 45 | if (event & PVPANIC_SHUTDOWN) { |
| 46 | qemu_system_guest_pvshutdown(); |
| 47 | return; |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | /* return supported events on read */ |
| 52 | static uint64_t pvpanic_read(void *opaque, hwaddr addr, unsigned size) |
| 53 | { |
| 54 | PVPanicState *pvp = opaque; |
| 55 | return pvp->events; |
| 56 | } |
| 57 | |
| 58 | static void pvpanic_write(void *opaque, hwaddr addr, uint64_t val, |
| 59 | unsigned size) |
| 60 | { |
| 61 | handle_event(val); |
| 62 | } |
| 63 | |
| 64 | static const MemoryRegionOps pvpanic_ops = { |
| 65 | .endianness = DEVICE_LITTLE_ENDIAN, |
| 66 | .read = pvpanic_read, |
| 67 | .write = pvpanic_write, |
| 68 | .impl = { |
| 69 | .min_access_size = 1, |
| 70 | .max_access_size = 1, |
| 71 | }, |
| 72 | }; |
| 73 | |
| 74 | void pvpanic_setup_io(PVPanicState *s, DeviceState *dev, unsigned size) |
| 75 | { |
| 76 | memory_region_init_io(&s->mr, OBJECT(dev), &pvpanic_ops, s, "pvpanic", size); |
| 77 | } |