1 /* 2 * IOAPIC emulation logic - common bits of emulated and KVM kernel model 3 * 4 * Copyright (c) 2004-2005 Fabrice Bellard 5 * Copyright (c) 2009 Xiantao Zhang, Intel 6 * Copyright (c) 2011 Jan Kiszka, Siemens AG 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 20 */ 21 22 #include "qemu/osdep.h" 23 #include "qapi/error.h" 24 #include "monitor/monitor.h" 25 #include "hw/i386/ioapic.h" 26 #include "hw/i386/ioapic_internal.h" 27 #include "hw/intc/intc.h" 28 #include "hw/sysbus.h" 29 30 /* ioapic_no count start from 0 to MAX_IOAPICS, 31 * remove as static variable from ioapic_common_init. 32 * now as a global variable, let child to increase the counter 33 * then we can drop the 'instance_no' argument 34 * and convert to our QOM's realize function 35 */ 36 int ioapic_no; 37 38 void ioapic_stat_update_irq(IOAPICCommonState *s, int irq, int level) 39 { 40 if (level != s->irq_level[irq]) { 41 s->irq_level[irq] = level; 42 if (level == 1) { 43 s->irq_count[irq]++; 44 } 45 } 46 } 47 48 static bool ioapic_get_statistics(InterruptStatsProvider *obj, 49 uint64_t **irq_counts, 50 unsigned int *nb_irqs) 51 { 52 IOAPICCommonState *s = IOAPIC_COMMON(obj); 53 54 *irq_counts = s->irq_count; 55 *nb_irqs = IOAPIC_NUM_PINS; 56 57 return true; 58 } 59 60 static void ioapic_irr_dump(Monitor *mon, const char *name, uint32_t bitmap) 61 { 62 int i; 63 64 monitor_printf(mon, "%-10s ", name); 65 if (bitmap == 0) { 66 monitor_printf(mon, "(none)\n"); 67 return; 68 } 69 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 70 if (bitmap & (1 << i)) { 71 monitor_printf(mon, "%-2u ", i); 72 } 73 } 74 monitor_printf(mon, "\n"); 75 } 76 77 void ioapic_print_redtbl(Monitor *mon, IOAPICCommonState *s) 78 { 79 static const char *delm_str[] = { 80 "fixed", "lowest", "SMI", "...", "NMI", "INIT", "...", "extINT"}; 81 uint32_t remote_irr = 0; 82 int i; 83 84 monitor_printf(mon, "ioapic0: ver=0x%x id=0x%02x sel=0x%02x", 85 s->version, s->id, s->ioregsel); 86 if (s->ioregsel) { 87 monitor_printf(mon, " (redir[%u])\n", 88 (s->ioregsel - IOAPIC_REG_REDTBL_BASE) >> 1); 89 } else { 90 monitor_printf(mon, "\n"); 91 } 92 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 93 uint64_t entry = s->ioredtbl[i]; 94 uint32_t delm = (uint32_t)((entry & IOAPIC_LVT_DELIV_MODE) >> 95 IOAPIC_LVT_DELIV_MODE_SHIFT); 96 monitor_printf(mon, " pin %-2u 0x%016"PRIx64" dest=%"PRIx64 97 " vec=%-3"PRIu64" %s %-5s %-6s %-6s %s\n", 98 i, entry, 99 (entry >> IOAPIC_LVT_DEST_SHIFT) & 100 (entry & IOAPIC_LVT_DEST_MODE ? 0xff : 0xf), 101 entry & IOAPIC_VECTOR_MASK, 102 entry & IOAPIC_LVT_POLARITY ? "active-lo" : "active-hi", 103 entry & IOAPIC_LVT_TRIGGER_MODE ? "level" : "edge", 104 entry & IOAPIC_LVT_MASKED ? "masked" : "", 105 delm_str[delm], 106 entry & IOAPIC_LVT_DEST_MODE ? "logical" : "physical"); 107 108 remote_irr |= entry & IOAPIC_LVT_TRIGGER_MODE ? 109 (entry & IOAPIC_LVT_REMOTE_IRR ? (1 << i) : 0) : 0; 110 } 111 ioapic_irr_dump(mon, " IRR", s->irr); 112 ioapic_irr_dump(mon, " Remote IRR", remote_irr); 113 } 114 115 void ioapic_reset_common(DeviceState *dev) 116 { 117 IOAPICCommonState *s = IOAPIC_COMMON(dev); 118 int i; 119 120 s->id = 0; 121 s->ioregsel = 0; 122 s->irr = 0; 123 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 124 s->ioredtbl[i] = 1 << IOAPIC_LVT_MASKED_SHIFT; 125 } 126 } 127 128 static int ioapic_dispatch_pre_save(void *opaque) 129 { 130 IOAPICCommonState *s = IOAPIC_COMMON(opaque); 131 IOAPICCommonClass *info = IOAPIC_COMMON_GET_CLASS(s); 132 133 if (info->pre_save) { 134 info->pre_save(s); 135 } 136 137 return 0; 138 } 139 140 static int ioapic_dispatch_post_load(void *opaque, int version_id) 141 { 142 IOAPICCommonState *s = IOAPIC_COMMON(opaque); 143 IOAPICCommonClass *info = IOAPIC_COMMON_GET_CLASS(s); 144 145 if (info->post_load) { 146 info->post_load(s); 147 } 148 return 0; 149 } 150 151 static void ioapic_common_realize(DeviceState *dev, Error **errp) 152 { 153 IOAPICCommonState *s = IOAPIC_COMMON(dev); 154 IOAPICCommonClass *info; 155 156 if (ioapic_no >= MAX_IOAPICS) { 157 error_setg(errp, "Only %d ioapics allowed", MAX_IOAPICS); 158 return; 159 } 160 161 info = IOAPIC_COMMON_GET_CLASS(s); 162 info->realize(dev, errp); 163 164 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->io_memory); 165 ioapic_no++; 166 } 167 168 static void ioapic_print_info(InterruptStatsProvider *obj, 169 Monitor *mon) 170 { 171 IOAPICCommonState *s = IOAPIC_COMMON(obj); 172 173 ioapic_dispatch_pre_save(s); 174 ioapic_print_redtbl(mon, s); 175 } 176 177 static const VMStateDescription vmstate_ioapic_common = { 178 .name = "ioapic", 179 .version_id = 3, 180 .minimum_version_id = 1, 181 .pre_save = ioapic_dispatch_pre_save, 182 .post_load = ioapic_dispatch_post_load, 183 .fields = (VMStateField[]) { 184 VMSTATE_UINT8(id, IOAPICCommonState), 185 VMSTATE_UINT8(ioregsel, IOAPICCommonState), 186 VMSTATE_UNUSED_V(2, 8), /* to account for qemu-kvm's v2 format */ 187 VMSTATE_UINT32_V(irr, IOAPICCommonState, 2), 188 VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICCommonState, IOAPIC_NUM_PINS), 189 VMSTATE_END_OF_LIST() 190 } 191 }; 192 193 static void ioapic_common_class_init(ObjectClass *klass, void *data) 194 { 195 DeviceClass *dc = DEVICE_CLASS(klass); 196 InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(klass); 197 198 dc->realize = ioapic_common_realize; 199 dc->vmsd = &vmstate_ioapic_common; 200 ic->print_info = ioapic_print_info; 201 ic->get_statistics = ioapic_get_statistics; 202 } 203 204 static const TypeInfo ioapic_common_type = { 205 .name = TYPE_IOAPIC_COMMON, 206 .parent = TYPE_SYS_BUS_DEVICE, 207 .instance_size = sizeof(IOAPICCommonState), 208 .class_size = sizeof(IOAPICCommonClass), 209 .class_init = ioapic_common_class_init, 210 .abstract = true, 211 .interfaces = (InterfaceInfo[]) { 212 { TYPE_INTERRUPT_STATS_PROVIDER }, 213 { } 214 }, 215 }; 216 217 static void ioapic_common_register_types(void) 218 { 219 type_register_static(&ioapic_common_type); 220 } 221 222 type_init(ioapic_common_register_types) 223