hw/intc/ioapic_common.c

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