1eec3d2adSHu Tao /* 2eec3d2adSHu Tao * QEMU simulated pvpanic device. 3eec3d2adSHu Tao * 4eec3d2adSHu Tao * Copyright Fujitsu, Corp. 2013 5eec3d2adSHu Tao * 6eec3d2adSHu Tao * Authors: 7eec3d2adSHu Tao * Wen Congyang <wency@cn.fujitsu.com> 8eec3d2adSHu Tao * Hu Tao <hutao@cn.fujitsu.com> 9eec3d2adSHu Tao * 10eec3d2adSHu Tao * This work is licensed under the terms of the GNU GPL, version 2 or later. 11eec3d2adSHu Tao * See the COPYING file in the top-level directory. 12eec3d2adSHu Tao * 13eec3d2adSHu Tao */ 14eec3d2adSHu Tao 150d1c9782SPeter Maydell #include "qemu/osdep.h" 16eec3d2adSHu Tao #include "qemu/log.h" 170b8fa32fSMarkus Armbruster #include "qemu/module.h" 1854d31236SMarkus Armbruster #include "sysemu/runstate.h" 19eec3d2adSHu Tao 2010a584b2SHu Tao #include "hw/nvram/fw_cfg.h" 21a27bd6c7SMarkus Armbruster #include "hw/qdev-properties.h" 220d5d8a3aSPhilippe Mathieu-Daudé #include "hw/misc/pvpanic.h" 23*db1015e9SEduardo Habkost #include "qom/object.h" 2410a584b2SHu Tao 257dc58deeSzhenwei pi /* The bit of supported pv event, TODO: include uapi header and remove this */ 26eec3d2adSHu Tao #define PVPANIC_F_PANICKED 0 277dc58deeSzhenwei pi #define PVPANIC_F_CRASHLOADED 1 28eec3d2adSHu Tao 29eec3d2adSHu Tao /* The pv event value */ 30eec3d2adSHu Tao #define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED) 317dc58deeSzhenwei pi #define PVPANIC_CRASHLOADED (1 << PVPANIC_F_CRASHLOADED) 32eec3d2adSHu Tao 33*db1015e9SEduardo Habkost typedef struct PVPanicState PVPanicState; 34eec3d2adSHu Tao #define ISA_PVPANIC_DEVICE(obj) \ 350d5d8a3aSPhilippe Mathieu-Daudé OBJECT_CHECK(PVPanicState, (obj), TYPE_PVPANIC) 36eec3d2adSHu Tao 37eec3d2adSHu Tao static void handle_event(int event) 38eec3d2adSHu Tao { 39eec3d2adSHu Tao static bool logged; 40eec3d2adSHu Tao 417dc58deeSzhenwei pi if (event & ~(PVPANIC_PANICKED | PVPANIC_CRASHLOADED) && !logged) { 42eec3d2adSHu Tao qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event); 43eec3d2adSHu Tao logged = true; 44eec3d2adSHu Tao } 45eec3d2adSHu Tao 46eec3d2adSHu Tao if (event & PVPANIC_PANICKED) { 47c86f106bSAnton Nefedov qemu_system_guest_panicked(NULL); 48eec3d2adSHu Tao return; 49eec3d2adSHu Tao } 507dc58deeSzhenwei pi 517dc58deeSzhenwei pi if (event & PVPANIC_CRASHLOADED) { 527dc58deeSzhenwei pi qemu_system_guest_crashloaded(NULL); 537dc58deeSzhenwei pi return; 547dc58deeSzhenwei pi } 55eec3d2adSHu Tao } 56eec3d2adSHu Tao 57eec3d2adSHu Tao #include "hw/isa/isa.h" 58eec3d2adSHu Tao 59*db1015e9SEduardo Habkost struct PVPanicState { 60eec3d2adSHu Tao ISADevice parent_obj; 61eec3d2adSHu Tao 62eec3d2adSHu Tao MemoryRegion io; 63eec3d2adSHu Tao uint16_t ioport; 64*db1015e9SEduardo Habkost }; 65eec3d2adSHu Tao 66eec3d2adSHu Tao /* return supported events on read */ 67eec3d2adSHu Tao static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size) 68eec3d2adSHu Tao { 69eec3d2adSHu Tao return PVPANIC_PANICKED; 70eec3d2adSHu Tao } 71eec3d2adSHu Tao 72eec3d2adSHu Tao static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val, 73eec3d2adSHu Tao unsigned size) 74eec3d2adSHu Tao { 75eec3d2adSHu Tao handle_event(val); 76eec3d2adSHu Tao } 77eec3d2adSHu Tao 78eec3d2adSHu Tao static const MemoryRegionOps pvpanic_ops = { 79eec3d2adSHu Tao .read = pvpanic_ioport_read, 80eec3d2adSHu Tao .write = pvpanic_ioport_write, 81eec3d2adSHu Tao .impl = { 82eec3d2adSHu Tao .min_access_size = 1, 83eec3d2adSHu Tao .max_access_size = 1, 84eec3d2adSHu Tao }, 85eec3d2adSHu Tao }; 86eec3d2adSHu Tao 87db895a1eSAndreas Färber static void pvpanic_isa_initfn(Object *obj) 88eec3d2adSHu Tao { 89db895a1eSAndreas Färber PVPanicState *s = ISA_PVPANIC_DEVICE(obj); 90db895a1eSAndreas Färber 913c161542SPaolo Bonzini memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1); 92db895a1eSAndreas Färber } 93db895a1eSAndreas Färber 94db895a1eSAndreas Färber static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp) 95db895a1eSAndreas Färber { 96db895a1eSAndreas Färber ISADevice *d = ISA_DEVICE(dev); 97eec3d2adSHu Tao PVPanicState *s = ISA_PVPANIC_DEVICE(dev); 98a5d3f640SMarcel Apfelbaum FWCfgState *fw_cfg = fw_cfg_find(); 99a5d3f640SMarcel Apfelbaum uint16_t *pvpanic_port; 100a5d3f640SMarcel Apfelbaum 101a5d3f640SMarcel Apfelbaum if (!fw_cfg) { 102a5d3f640SMarcel Apfelbaum return; 103a5d3f640SMarcel Apfelbaum } 104a5d3f640SMarcel Apfelbaum 105a5d3f640SMarcel Apfelbaum pvpanic_port = g_malloc(sizeof(*pvpanic_port)); 106a5d3f640SMarcel Apfelbaum *pvpanic_port = cpu_to_le16(s->ioport); 107a5d3f640SMarcel Apfelbaum fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port, 108a5d3f640SMarcel Apfelbaum sizeof(*pvpanic_port)); 109eec3d2adSHu Tao 110db895a1eSAndreas Färber isa_register_ioport(d, &s->io, s->ioport); 111eec3d2adSHu Tao } 112eec3d2adSHu Tao 113eec3d2adSHu Tao static Property pvpanic_isa_properties[] = { 114309cd62dSMichael S. Tsirkin DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505), 115eec3d2adSHu Tao DEFINE_PROP_END_OF_LIST(), 116eec3d2adSHu Tao }; 117eec3d2adSHu Tao 118eec3d2adSHu Tao static void pvpanic_isa_class_init(ObjectClass *klass, void *data) 119eec3d2adSHu Tao { 120eec3d2adSHu Tao DeviceClass *dc = DEVICE_CLASS(klass); 121eec3d2adSHu Tao 122db895a1eSAndreas Färber dc->realize = pvpanic_isa_realizefn; 1234f67d30bSMarc-André Lureau device_class_set_props(dc, pvpanic_isa_properties); 124a5d3f640SMarcel Apfelbaum set_bit(DEVICE_CATEGORY_MISC, dc->categories); 125eec3d2adSHu Tao } 126eec3d2adSHu Tao 127eec3d2adSHu Tao static TypeInfo pvpanic_isa_info = { 1280d5d8a3aSPhilippe Mathieu-Daudé .name = TYPE_PVPANIC, 129eec3d2adSHu Tao .parent = TYPE_ISA_DEVICE, 130eec3d2adSHu Tao .instance_size = sizeof(PVPanicState), 131db895a1eSAndreas Färber .instance_init = pvpanic_isa_initfn, 132eec3d2adSHu Tao .class_init = pvpanic_isa_class_init, 133eec3d2adSHu Tao }; 134eec3d2adSHu Tao 135eec3d2adSHu Tao static void pvpanic_register_types(void) 136eec3d2adSHu Tao { 137eec3d2adSHu Tao type_register_static(&pvpanic_isa_info); 138eec3d2adSHu Tao } 139eec3d2adSHu Tao 140eec3d2adSHu Tao type_init(pvpanic_register_types) 141