hw/i386/kvm/ioapic.c

   1 /*
   2  * KVM in-kernel IOPIC support
   3  *
   4  * Copyright (c) 2011 Siemens AG
   5  *
   6  * Authors:
   7  *  Jan Kiszka          <jan.kiszka@siemens.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL version 2.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "monitor/monitor.h"
  15 #include "hw/i386/x86.h"
  16 #include "hw/irq.h"
  17 #include "hw/qdev-properties.h"
  18 #include "hw/i386/ioapic_internal.h"
  19 #include "hw/i386/apic_internal.h"
  20 #include "sysemu/kvm.h"
  21
  22 /* PC Utility function */
  23 void kvm_pc_setup_irq_routing(bool pci_enabled)
  24 {
  25     KVMState *s = kvm_state;
  26     int i;
  27
  28     assert(kvm_has_gsi_routing());
  29     for (i = 0; i < 8; ++i) {
  30         if (i == 2) {
  31             continue;
  32         }
  33         kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i);
  34     }
  35     for (i = 8; i < 16; ++i) {
  36         kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8);
  37     }
  38     if (pci_enabled) {
  39         for (i = 0; i < 24; ++i) {
  40             if (i == 0) {
  41                 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2);
  42             } else if (i != 2) {
  43                 kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i);
  44             }
  45         }
  46     }
  47     kvm_irqchip_commit_routes(s);
  48 }
  49
  50 typedef struct KVMIOAPICState KVMIOAPICState;
  51
  52 struct KVMIOAPICState {
  53     IOAPICCommonState ioapic;
  54     uint32_t kvm_gsi_base;
  55 };
  56
  57 static void kvm_ioapic_get(IOAPICCommonState *s)
  58 {
  59     struct kvm_irqchip chip;
  60     struct kvm_ioapic_state *kioapic;
  61     int ret, i;
  62
  63     chip.chip_id = KVM_IRQCHIP_IOAPIC;
  64     ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
  65     if (ret < 0) {
  66         fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
  67         abort();
  68     }
  69
  70     kioapic = &chip.chip.ioapic;
  71
  72     s->id = kioapic->id;
  73     s->ioregsel = kioapic->ioregsel;
  74     s->irr = kioapic->irr;
  75     for (i = 0; i < IOAPIC_NUM_PINS; i++) {
  76         s->ioredtbl[i] = kioapic->redirtbl[i].bits;
  77     }
  78 }
  79
  80 static void kvm_ioapic_put(IOAPICCommonState *s)
  81 {
  82     struct kvm_irqchip chip;
  83     struct kvm_ioapic_state *kioapic;
  84     int ret, i;
  85
  86     chip.chip_id = KVM_IRQCHIP_IOAPIC;
  87     kioapic = &chip.chip.ioapic;
  88
  89     kioapic->id = s->id;
  90     kioapic->ioregsel = s->ioregsel;
  91     kioapic->base_address = s->busdev.mmio[0].addr;
  92     kioapic->irr = s->irr;
  93     for (i = 0; i < IOAPIC_NUM_PINS; i++) {
  94         kioapic->redirtbl[i].bits = s->ioredtbl[i];
  95     }
  96
  97     ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip);
  98     if (ret < 0) {
  99         fprintf(stderr, "KVM_SET_IRQCHIP failed: %s\n", strerror(ret));
 100         abort();
 101     }
 102 }
 103
 104 static void kvm_ioapic_reset(DeviceState *dev)
 105 {
 106     IOAPICCommonState *s = IOAPIC_COMMON(dev);
 107
 108     ioapic_reset_common(dev);
 109     kvm_ioapic_put(s);
 110 }
 111
 112 static void kvm_ioapic_set_irq(void *opaque, int irq, int level)
 113 {
 114     KVMIOAPICState *s = opaque;
 115     IOAPICCommonState *common = IOAPIC_COMMON(s);
 116     int delivered;
 117
 118     ioapic_stat_update_irq(common, irq, level);
 119     delivered = kvm_set_irq(kvm_state, s->kvm_gsi_base + irq, level);
 120     apic_report_irq_delivered(delivered);
 121 }
 122
 123 static void kvm_ioapic_realize(DeviceState *dev, Error **errp)
 124 {
 125     IOAPICCommonState *s = IOAPIC_COMMON(dev);
 126
 127     memory_region_init_io(&s->io_memory, OBJECT(dev), NULL, NULL, "kvm-ioapic", 0x1000);
 128     /*
 129      * KVM ioapic only supports 0x11 now. This will only be used when
 130      * we want to dump ioapic version.
 131      */
 132     s->version = 0x11;
 133
 134     qdev_init_gpio_in(dev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS);
 135 }
 136
 137 static Property kvm_ioapic_properties[] = {
 138     DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
 139     DEFINE_PROP_END_OF_LIST()
 140 };
 141
 142 static void kvm_ioapic_class_init(ObjectClass *klass, void *data)
 143 {
 144     IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass);
 145     DeviceClass *dc = DEVICE_CLASS(klass);
 146
 147     k->realize   = kvm_ioapic_realize;
 148     k->pre_save  = kvm_ioapic_get;
 149     k->post_load = kvm_ioapic_put;
 150     dc->reset    = kvm_ioapic_reset;
 151     device_class_set_props(dc, kvm_ioapic_properties);
 152 }
 153
 154 static const TypeInfo kvm_ioapic_info = {
 155     .name  = TYPE_KVM_IOAPIC,
 156     .parent = TYPE_IOAPIC_COMMON,
 157     .instance_size = sizeof(KVMIOAPICState),
 158     .class_init = kvm_ioapic_class_init,
 159 };
 160
 161 static void kvm_ioapic_register_types(void)
 162 {
 163     type_register_static(&kvm_ioapic_info);
 164 }
 165
 166 type_init(kvm_ioapic_register_types)