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