LXR qemu/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 "hw/i386/pc.h"
  14#include "hw/i386/ioapic_internal.h"
  15#include "hw/i386/apic_internal.h"
  16#include "sysemu/kvm.h"
  17
  18/* PC Utility function */
  19void kvm_pc_setup_irq_routing(bool pci_enabled)
  20{
  21    KVMState *s = kvm_state;
  22    int i;
  23
  24    if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) {
  25        for (i = 0; i < 8; ++i) {
  26            if (i == 2) {
  27                continue;
  28            }
  29            kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i);
  30        }
  31        for (i = 8; i < 16; ++i) {
  32            kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8);
  33        }
  34        if (pci_enabled) {
  35            for (i = 0; i < 24; ++i) {
  36                if (i == 0) {
  37                    kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2);
  38                } else if (i != 2) {
  39                    kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i);
  40                }
  41            }
  42        }
  43    }
  44}
  45
  46void kvm_pc_gsi_handler(void *opaque, int n, int level)
  47{
  48    GSIState *s = opaque;
  49
  50    if (n < ISA_NUM_IRQS) {
  51        /* Kernel will forward to both PIC and IOAPIC */
  52        qemu_set_irq(s->i8259_irq[n], level);
  53    } else {
  54        qemu_set_irq(s->ioapic_irq[n], level);
  55    }
  56}
  57
  58typedef struct KVMIOAPICState KVMIOAPICState;
  59
  60struct KVMIOAPICState {
  61    IOAPICCommonState ioapic;
  62    uint32_t kvm_gsi_base;
  63};
  64
  65static void kvm_ioapic_get(IOAPICCommonState *s)
  66{
  67    struct kvm_irqchip chip;
  68    struct kvm_ioapic_state *kioapic;
  69    int ret, i;
  70
  71    chip.chip_id = KVM_IRQCHIP_IOAPIC;
  72    ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip);
  73    if (ret < 0) {
  74        fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
  75        abort();
  76    }
  77
  78    kioapic = &chip.chip.ioapic;
  79
  80    s->id = kioapic->id;
  81    s->ioregsel = kioapic->ioregsel;
  82    s->irr = kioapic->irr;
  83    for (i = 0; i < IOAPIC_NUM_PINS; i++) {
  84        s->ioredtbl[i] = kioapic->redirtbl[i].bits;
  85    }
  86}
  87
  88static void kvm_ioapic_put(IOAPICCommonState *s)
  89{
  90    struct kvm_irqchip chip;
  91    struct kvm_ioapic_state *kioapic;
  92    int ret, i;
  93
  94    chip.chip_id = KVM_IRQCHIP_IOAPIC;
  95    kioapic = &chip.chip.ioapic;
  96
  97    kioapic->id = s->id;
  98    kioapic->ioregsel = s->ioregsel;
  99    kioapic->base_address = s->busdev.mmio[0].addr;
 100    kioapic->irr = s->irr;
 101    for (i = 0; i < IOAPIC_NUM_PINS; i++) {
 102        kioapic->redirtbl[i].bits = s->ioredtbl[i];
 103    }
 104
 105    ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip);
 106    if (ret < 0) {
 107        fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret));
 108        abort();
 109    }
 110}
 111
 112static void kvm_ioapic_reset(DeviceState *dev)
 113{
 114    IOAPICCommonState *s = DO_UPCAST(IOAPICCommonState, busdev.qdev, dev);
 115
 116    ioapic_reset_common(dev);
 117    kvm_ioapic_put(s);
 118}
 119
 120static void kvm_ioapic_set_irq(void *opaque, int irq, int level)
 121{
 122    KVMIOAPICState *s = opaque;
 123    int delivered;
 124
 125    delivered = kvm_set_irq(kvm_state, s->kvm_gsi_base + irq, level);
 126    apic_report_irq_delivered(delivered);
 127}
 128
 129static void kvm_ioapic_init(IOAPICCommonState *s, int instance_no)
 130{
 131    memory_region_init_reservation(&s->io_memory, "kvm-ioapic", 0x1000);
 132
 133    qdev_init_gpio_in(&s->busdev.qdev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS);
 134}
 135
 136static Property kvm_ioapic_properties[] = {
 137    DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0),
 138    DEFINE_PROP_END_OF_LIST()
 139};
 140
 141static 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->init      = kvm_ioapic_init;
 147    k->pre_save  = kvm_ioapic_get;
 148    k->post_load = kvm_ioapic_put;
 149    dc->reset    = kvm_ioapic_reset;
 150    dc->props    = kvm_ioapic_properties;
 151}
 152
 153static const TypeInfo kvm_ioapic_info = {
 154    .name  = "kvm-ioapic",
 155    .parent = TYPE_IOAPIC_COMMON,
 156    .instance_size = sizeof(KVMIOAPICState),
 157    .class_init = kvm_ioapic_class_init,
 158};
 159
 160static void kvm_ioapic_register_types(void)
 161{
 162    type_register_static(&kvm_ioapic_info);
 163}
 164
 165type_init(kvm_ioapic_register_types)
 166