ioapic_common.c (6894B)
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 2.1 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 "qemu/module.h" 25 #include "migration/vmstate.h" 26 #include "monitor/monitor.h" 27 #include "hw/i386/ioapic.h" 28 #include "hw/i386/ioapic_internal.h" 29 #include "hw/intc/intc.h" 30 #include "hw/sysbus.h" 31 32 /* ioapic_no count start from 0 to MAX_IOAPICS, 33 * remove as static variable from ioapic_common_init. 34 * now as a global variable, let child to increase the counter 35 * then we can drop the 'instance_no' argument 36 * and convert to our QOM's realize function 37 */ 38 int ioapic_no; 39 40 void ioapic_stat_update_irq(IOAPICCommonState *s, int irq, int level) 41 { 42 if (level != s->irq_level[irq]) { 43 s->irq_level[irq] = level; 44 if (level == 1) { 45 s->irq_count[irq]++; 46 } 47 } 48 } 49 50 static bool ioapic_get_statistics(InterruptStatsProvider *obj, 51 uint64_t **irq_counts, 52 unsigned int *nb_irqs) 53 { 54 IOAPICCommonState *s = IOAPIC_COMMON(obj); 55 56 *irq_counts = s->irq_count; 57 *nb_irqs = IOAPIC_NUM_PINS; 58 59 return true; 60 } 61 62 static void ioapic_irr_dump(Monitor *mon, const char *name, uint32_t bitmap) 63 { 64 int i; 65 66 monitor_printf(mon, "%-10s ", name); 67 if (bitmap == 0) { 68 monitor_printf(mon, "(none)\n"); 69 return; 70 } 71 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 72 if (bitmap & (1 << i)) { 73 monitor_printf(mon, "%-2u ", i); 74 } 75 } 76 monitor_printf(mon, "\n"); 77 } 78 79 static void ioapic_print_redtbl(Monitor *mon, IOAPICCommonState *s) 80 { 81 static const char *delm_str[] = { 82 "fixed", "lowest", "SMI", "...", "NMI", "INIT", "...", "extINT"}; 83 uint32_t remote_irr = 0; 84 int i; 85 86 monitor_printf(mon, "ioapic0: ver=0x%x id=0x%02x sel=0x%02x", 87 s->version, s->id, s->ioregsel); 88 if (s->ioregsel) { 89 monitor_printf(mon, " (redir[%u])\n", 90 (s->ioregsel - IOAPIC_REG_REDTBL_BASE) >> 1); 91 } else { 92 monitor_printf(mon, "\n"); 93 } 94 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 95 uint64_t entry = s->ioredtbl[i]; 96 uint32_t delm = (uint32_t)((entry & IOAPIC_LVT_DELIV_MODE) >> 97 IOAPIC_LVT_DELIV_MODE_SHIFT); 98 monitor_printf(mon, " pin %-2u 0x%016"PRIx64" dest=%"PRIx64 99 " vec=%-3"PRIu64" %s %-5s %-6s %-6s %s\n", 100 i, entry, 101 (entry >> IOAPIC_LVT_DEST_SHIFT) & 102 (entry & IOAPIC_LVT_DEST_MODE ? 0xff : 0xf), 103 entry & IOAPIC_VECTOR_MASK, 104 entry & IOAPIC_LVT_POLARITY ? "active-lo" : "active-hi", 105 entry & IOAPIC_LVT_TRIGGER_MODE ? "level" : "edge", 106 entry & IOAPIC_LVT_MASKED ? "masked" : "", 107 delm_str[delm], 108 entry & IOAPIC_LVT_DEST_MODE ? "logical" : "physical"); 109 110 remote_irr |= entry & IOAPIC_LVT_TRIGGER_MODE ? 111 (entry & IOAPIC_LVT_REMOTE_IRR ? (1 << i) : 0) : 0; 112 } 113 ioapic_irr_dump(mon, " IRR", s->irr); 114 ioapic_irr_dump(mon, " Remote IRR", remote_irr); 115 } 116 117 void ioapic_reset_common(DeviceState *dev) 118 { 119 IOAPICCommonState *s = IOAPIC_COMMON(dev); 120 int i; 121 122 s->id = 0; 123 s->ioregsel = 0; 124 s->irr = 0; 125 for (i = 0; i < IOAPIC_NUM_PINS; i++) { 126 s->ioredtbl[i] = 1 << IOAPIC_LVT_MASKED_SHIFT; 127 } 128 } 129 130 static int ioapic_dispatch_pre_save(void *opaque) 131 { 132 IOAPICCommonState *s = IOAPIC_COMMON(opaque); 133 IOAPICCommonClass *info = IOAPIC_COMMON_GET_CLASS(s); 134 135 if (info->pre_save) { 136 info->pre_save(s); 137 } 138 139 return 0; 140 } 141 142 static int ioapic_dispatch_post_load(void *opaque, int version_id) 143 { 144 IOAPICCommonState *s = IOAPIC_COMMON(opaque); 145 IOAPICCommonClass *info = IOAPIC_COMMON_GET_CLASS(s); 146 147 if (info->post_load) { 148 info->post_load(s); 149 } 150 return 0; 151 } 152 153 static void ioapic_common_realize(DeviceState *dev, Error **errp) 154 { 155 IOAPICCommonState *s = IOAPIC_COMMON(dev); 156 IOAPICCommonClass *info; 157 158 if (ioapic_no >= MAX_IOAPICS) { 159 error_setg(errp, "Only %d ioapics allowed", MAX_IOAPICS); 160 return; 161 } 162 163 info = IOAPIC_COMMON_GET_CLASS(s); 164 info->realize(dev, errp); 165 166 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->io_memory); 167 ioapic_no++; 168 } 169 170 static void ioapic_print_info(InterruptStatsProvider *obj, 171 Monitor *mon) 172 { 173 IOAPICCommonState *s = IOAPIC_COMMON(obj); 174 175 ioapic_dispatch_pre_save(s); 176 ioapic_print_redtbl(mon, s); 177 } 178 179 static const VMStateDescription vmstate_ioapic_common = { 180 .name = "ioapic", 181 .version_id = 3, 182 .minimum_version_id = 1, 183 .pre_save = ioapic_dispatch_pre_save, 184 .post_load = ioapic_dispatch_post_load, 185 .fields = (VMStateField[]) { 186 VMSTATE_UINT8(id, IOAPICCommonState), 187 VMSTATE_UINT8(ioregsel, IOAPICCommonState), 188 VMSTATE_UNUSED_V(2, 8), /* to account for qemu-kvm's v2 format */ 189 VMSTATE_UINT32_V(irr, IOAPICCommonState, 2), 190 VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICCommonState, IOAPIC_NUM_PINS), 191 VMSTATE_END_OF_LIST() 192 } 193 }; 194 195 static void ioapic_common_class_init(ObjectClass *klass, void *data) 196 { 197 DeviceClass *dc = DEVICE_CLASS(klass); 198 InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(klass); 199 200 dc->realize = ioapic_common_realize; 201 dc->vmsd = &vmstate_ioapic_common; 202 ic->print_info = ioapic_print_info; 203 ic->get_statistics = ioapic_get_statistics; 204 } 205 206 static const TypeInfo ioapic_common_type = { 207 .name = TYPE_IOAPIC_COMMON, 208 .parent = TYPE_SYS_BUS_DEVICE, 209 .instance_size = sizeof(IOAPICCommonState), 210 .class_size = sizeof(IOAPICCommonClass), 211 .class_init = ioapic_common_class_init, 212 .abstract = true, 213 .interfaces = (InterfaceInfo[]) { 214 { TYPE_INTERRUPT_STATS_PROVIDER }, 215 { } 216 }, 217 }; 218 219 static void ioapic_common_register_types(void) 220 { 221 type_register_static(&ioapic_common_type); 222 } 223 224 type_init(ioapic_common_register_types)