diff options
Diffstat (limited to 'hw/i386/kvm/ioapic.c')
| -rw-r--r-- | hw/i386/kvm/ioapic.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/hw/i386/kvm/ioapic.c b/hw/i386/kvm/ioapic.c new file mode 100644 index 0000000000..a3bd519b4d --- /dev/null +++ b/hw/i386/kvm/ioapic.c @@ -0,0 +1,165 @@ +/* + * KVM in-kernel IOPIC support + * + * Copyright (c) 2011 Siemens AG + * + * Authors: + * Jan Kiszka <jan.kiszka@siemens.com> + * + * This work is licensed under the terms of the GNU GPL version 2. + * See the COPYING file in the top-level directory. + */ + +#include "hw/i386/pc.h" +#include "hw/i386/ioapic_internal.h" +#include "hw/i386/apic_internal.h" +#include "sysemu/kvm.h" + +/* PC Utility function */ +void kvm_pc_setup_irq_routing(bool pci_enabled) +{ + KVMState *s = kvm_state; + int i; + + if (kvm_check_extension(s, KVM_CAP_IRQ_ROUTING)) { + for (i = 0; i < 8; ++i) { + if (i == 2) { + continue; + } + kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_MASTER, i); + } + for (i = 8; i < 16; ++i) { + kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_PIC_SLAVE, i - 8); + } + if (pci_enabled) { + for (i = 0; i < 24; ++i) { + if (i == 0) { + kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, 2); + } else if (i != 2) { + kvm_irqchip_add_irq_route(s, i, KVM_IRQCHIP_IOAPIC, i); + } + } + } + } +} + +void kvm_pc_gsi_handler(void *opaque, int n, int level) +{ + GSIState *s = opaque; + + if (n < ISA_NUM_IRQS) { + /* Kernel will forward to both PIC and IOAPIC */ + qemu_set_irq(s->i8259_irq[n], level); + } else { + qemu_set_irq(s->ioapic_irq[n], level); + } +} + +typedef struct KVMIOAPICState KVMIOAPICState; + +struct KVMIOAPICState { + IOAPICCommonState ioapic; + uint32_t kvm_gsi_base; +}; + +static void kvm_ioapic_get(IOAPICCommonState *s) +{ + struct kvm_irqchip chip; + struct kvm_ioapic_state *kioapic; + int ret, i; + + chip.chip_id = KVM_IRQCHIP_IOAPIC; + ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); + if (ret < 0) { + fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); + abort(); + } + + kioapic = &chip.chip.ioapic; + + s->id = kioapic->id; + s->ioregsel = kioapic->ioregsel; + s->irr = kioapic->irr; + for (i = 0; i < IOAPIC_NUM_PINS; i++) { + s->ioredtbl[i] = kioapic->redirtbl[i].bits; + } +} + +static void kvm_ioapic_put(IOAPICCommonState *s) +{ + struct kvm_irqchip chip; + struct kvm_ioapic_state *kioapic; + int ret, i; + + chip.chip_id = KVM_IRQCHIP_IOAPIC; + kioapic = &chip.chip.ioapic; + + kioapic->id = s->id; + kioapic->ioregsel = s->ioregsel; + kioapic->base_address = s->busdev.mmio[0].addr; + kioapic->irr = s->irr; + for (i = 0; i < IOAPIC_NUM_PINS; i++) { + kioapic->redirtbl[i].bits = s->ioredtbl[i]; + } + + ret = kvm_vm_ioctl(kvm_state, KVM_SET_IRQCHIP, &chip); + if (ret < 0) { + fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); + abort(); + } +} + +static void kvm_ioapic_reset(DeviceState *dev) +{ + IOAPICCommonState *s = DO_UPCAST(IOAPICCommonState, busdev.qdev, dev); + + ioapic_reset_common(dev); + kvm_ioapic_put(s); +} + +static void kvm_ioapic_set_irq(void *opaque, int irq, int level) +{ + KVMIOAPICState *s = opaque; + int delivered; + + delivered = kvm_set_irq(kvm_state, s->kvm_gsi_base + irq, level); + apic_report_irq_delivered(delivered); +} + +static void kvm_ioapic_init(IOAPICCommonState *s, int instance_no) +{ + memory_region_init_reservation(&s->io_memory, "kvm-ioapic", 0x1000); + + qdev_init_gpio_in(&s->busdev.qdev, kvm_ioapic_set_irq, IOAPIC_NUM_PINS); +} + +static Property kvm_ioapic_properties[] = { + DEFINE_PROP_UINT32("gsi_base", KVMIOAPICState, kvm_gsi_base, 0), + DEFINE_PROP_END_OF_LIST() +}; + +static void kvm_ioapic_class_init(ObjectClass *klass, void *data) +{ + IOAPICCommonClass *k = IOAPIC_COMMON_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + k->init = kvm_ioapic_init; + k->pre_save = kvm_ioapic_get; + k->post_load = kvm_ioapic_put; + dc->reset = kvm_ioapic_reset; + dc->props = kvm_ioapic_properties; +} + +static const TypeInfo kvm_ioapic_info = { + .name = "kvm-ioapic", + .parent = TYPE_IOAPIC_COMMON, + .instance_size = sizeof(KVMIOAPICState), + .class_init = kvm_ioapic_class_init, +}; + +static void kvm_ioapic_register_types(void) +{ + type_register_static(&kvm_ioapic_info); +} + +type_init(kvm_ioapic_register_types) |