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 "sysemu/sysemu.h" 17eec3d2adSHu Tao #include "qemu/log.h" 180b8fa32fSMarkus Armbruster #include "qemu/module.h" 19eec3d2adSHu Tao 2010a584b2SHu Tao #include "hw/nvram/fw_cfg.h" 21*a27bd6c7SMarkus Armbruster #include "hw/qdev-properties.h" 220d5d8a3aSPhilippe Mathieu-Daudé #include "hw/misc/pvpanic.h" 2310a584b2SHu Tao 24eec3d2adSHu Tao /* The bit of supported pv event */ 25eec3d2adSHu Tao #define PVPANIC_F_PANICKED 0 26eec3d2adSHu Tao 27eec3d2adSHu Tao /* The pv event value */ 28eec3d2adSHu Tao #define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED) 29eec3d2adSHu Tao 30eec3d2adSHu Tao #define ISA_PVPANIC_DEVICE(obj) \ 310d5d8a3aSPhilippe Mathieu-Daudé OBJECT_CHECK(PVPanicState, (obj), TYPE_PVPANIC) 32eec3d2adSHu Tao 33eec3d2adSHu Tao static void handle_event(int event) 34eec3d2adSHu Tao { 35eec3d2adSHu Tao static bool logged; 36eec3d2adSHu Tao 37eec3d2adSHu Tao if (event & ~PVPANIC_PANICKED && !logged) { 38eec3d2adSHu Tao qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event); 39eec3d2adSHu Tao logged = true; 40eec3d2adSHu Tao } 41eec3d2adSHu Tao 42eec3d2adSHu Tao if (event & PVPANIC_PANICKED) { 43c86f106bSAnton Nefedov qemu_system_guest_panicked(NULL); 44eec3d2adSHu Tao return; 45eec3d2adSHu Tao } 46eec3d2adSHu Tao } 47eec3d2adSHu Tao 48eec3d2adSHu Tao #include "hw/isa/isa.h" 49eec3d2adSHu Tao 50eec3d2adSHu Tao typedef struct PVPanicState { 51eec3d2adSHu Tao ISADevice parent_obj; 52eec3d2adSHu Tao 53eec3d2adSHu Tao MemoryRegion io; 54eec3d2adSHu Tao uint16_t ioport; 55eec3d2adSHu Tao } PVPanicState; 56eec3d2adSHu Tao 57eec3d2adSHu Tao /* return supported events on read */ 58eec3d2adSHu Tao static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size) 59eec3d2adSHu Tao { 60eec3d2adSHu Tao return PVPANIC_PANICKED; 61eec3d2adSHu Tao } 62eec3d2adSHu Tao 63eec3d2adSHu Tao static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val, 64eec3d2adSHu Tao unsigned size) 65eec3d2adSHu Tao { 66eec3d2adSHu Tao handle_event(val); 67eec3d2adSHu Tao } 68eec3d2adSHu Tao 69eec3d2adSHu Tao static const MemoryRegionOps pvpanic_ops = { 70eec3d2adSHu Tao .read = pvpanic_ioport_read, 71eec3d2adSHu Tao .write = pvpanic_ioport_write, 72eec3d2adSHu Tao .impl = { 73eec3d2adSHu Tao .min_access_size = 1, 74eec3d2adSHu Tao .max_access_size = 1, 75eec3d2adSHu Tao }, 76eec3d2adSHu Tao }; 77eec3d2adSHu Tao 78db895a1eSAndreas Färber static void pvpanic_isa_initfn(Object *obj) 79eec3d2adSHu Tao { 80db895a1eSAndreas Färber PVPanicState *s = ISA_PVPANIC_DEVICE(obj); 81db895a1eSAndreas Färber 823c161542SPaolo Bonzini memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1); 83db895a1eSAndreas Färber } 84db895a1eSAndreas Färber 85db895a1eSAndreas Färber static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp) 86db895a1eSAndreas Färber { 87db895a1eSAndreas Färber ISADevice *d = ISA_DEVICE(dev); 88eec3d2adSHu Tao PVPanicState *s = ISA_PVPANIC_DEVICE(dev); 89a5d3f640SMarcel Apfelbaum FWCfgState *fw_cfg = fw_cfg_find(); 90a5d3f640SMarcel Apfelbaum uint16_t *pvpanic_port; 91a5d3f640SMarcel Apfelbaum 92a5d3f640SMarcel Apfelbaum if (!fw_cfg) { 93a5d3f640SMarcel Apfelbaum return; 94a5d3f640SMarcel Apfelbaum } 95a5d3f640SMarcel Apfelbaum 96a5d3f640SMarcel Apfelbaum pvpanic_port = g_malloc(sizeof(*pvpanic_port)); 97a5d3f640SMarcel Apfelbaum *pvpanic_port = cpu_to_le16(s->ioport); 98a5d3f640SMarcel Apfelbaum fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port, 99a5d3f640SMarcel Apfelbaum sizeof(*pvpanic_port)); 100eec3d2adSHu Tao 101db895a1eSAndreas Färber isa_register_ioport(d, &s->io, s->ioport); 102eec3d2adSHu Tao } 103eec3d2adSHu Tao 104eec3d2adSHu Tao static Property pvpanic_isa_properties[] = { 105309cd62dSMichael S. Tsirkin DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505), 106eec3d2adSHu Tao DEFINE_PROP_END_OF_LIST(), 107eec3d2adSHu Tao }; 108eec3d2adSHu Tao 109eec3d2adSHu Tao static void pvpanic_isa_class_init(ObjectClass *klass, void *data) 110eec3d2adSHu Tao { 111eec3d2adSHu Tao DeviceClass *dc = DEVICE_CLASS(klass); 112eec3d2adSHu Tao 113db895a1eSAndreas Färber dc->realize = pvpanic_isa_realizefn; 114eec3d2adSHu Tao dc->props = pvpanic_isa_properties; 115a5d3f640SMarcel Apfelbaum set_bit(DEVICE_CATEGORY_MISC, dc->categories); 116eec3d2adSHu Tao } 117eec3d2adSHu Tao 118eec3d2adSHu Tao static TypeInfo pvpanic_isa_info = { 1190d5d8a3aSPhilippe Mathieu-Daudé .name = TYPE_PVPANIC, 120eec3d2adSHu Tao .parent = TYPE_ISA_DEVICE, 121eec3d2adSHu Tao .instance_size = sizeof(PVPanicState), 122db895a1eSAndreas Färber .instance_init = pvpanic_isa_initfn, 123eec3d2adSHu Tao .class_init = pvpanic_isa_class_init, 124eec3d2adSHu Tao }; 125eec3d2adSHu Tao 126eec3d2adSHu Tao static void pvpanic_register_types(void) 127eec3d2adSHu Tao { 128eec3d2adSHu Tao type_register_static(&pvpanic_isa_info); 129eec3d2adSHu Tao } 130eec3d2adSHu Tao 131eec3d2adSHu Tao type_init(pvpanic_register_types) 132