diff options
Diffstat (limited to 'src/hw/i386/kvm/i8259.c')
| -rw-r--r-- | src/hw/i386/kvm/i8259.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/hw/i386/kvm/i8259.c b/src/hw/i386/kvm/i8259.c new file mode 100644 index 0000000..53e3ca8 --- /dev/null +++ b/src/hw/i386/kvm/i8259.c @@ -0,0 +1,162 @@ +/* + * KVM in-kernel PIC (i8259) 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/isa/i8259_internal.h" +#include "hw/i386/apic_internal.h" +#include "sysemu/kvm.h" + +#define TYPE_KVM_I8259 "kvm-i8259" +#define KVM_PIC_CLASS(class) \ + OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259) +#define KVM_PIC_GET_CLASS(obj) \ + OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259) + +/** + * KVMPICClass: + * @parent_realize: The parent's realizefn. + */ +typedef struct KVMPICClass { + PICCommonClass parent_class; + + DeviceRealize parent_realize; +} KVMPICClass; + +static void kvm_pic_get(PICCommonState *s) +{ + struct kvm_irqchip chip; + struct kvm_pic_state *kpic; + int ret; + + chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; + ret = kvm_vm_ioctl(kvm_state, KVM_GET_IRQCHIP, &chip); + if (ret < 0) { + fprintf(stderr, "KVM_GET_IRQCHIP failed: %s\n", strerror(ret)); + abort(); + } + + kpic = &chip.chip.pic; + + s->last_irr = kpic->last_irr; + s->irr = kpic->irr; + s->imr = kpic->imr; + s->isr = kpic->isr; + s->priority_add = kpic->priority_add; + s->irq_base = kpic->irq_base; + s->read_reg_select = kpic->read_reg_select; + s->poll = kpic->poll; + s->special_mask = kpic->special_mask; + s->init_state = kpic->init_state; + s->auto_eoi = kpic->auto_eoi; + s->rotate_on_auto_eoi = kpic->rotate_on_auto_eoi; + s->special_fully_nested_mode = kpic->special_fully_nested_mode; + s->init4 = kpic->init4; + s->elcr = kpic->elcr; + s->elcr_mask = kpic->elcr_mask; +} + +static void kvm_pic_put(PICCommonState *s) +{ + struct kvm_irqchip chip; + struct kvm_pic_state *kpic; + int ret; + + chip.chip_id = s->master ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE; + + kpic = &chip.chip.pic; + + kpic->last_irr = s->last_irr; + kpic->irr = s->irr; + kpic->imr = s->imr; + kpic->isr = s->isr; + kpic->priority_add = s->priority_add; + kpic->irq_base = s->irq_base; + kpic->read_reg_select = s->read_reg_select; + kpic->poll = s->poll; + kpic->special_mask = s->special_mask; + kpic->init_state = s->init_state; + kpic->auto_eoi = s->auto_eoi; + kpic->rotate_on_auto_eoi = s->rotate_on_auto_eoi; + kpic->special_fully_nested_mode = s->special_fully_nested_mode; + kpic->init4 = s->init4; + kpic->elcr = s->elcr; + kpic->elcr_mask = s->elcr_mask; + + 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_pic_reset(DeviceState *dev) +{ + PICCommonState *s = PIC_COMMON(dev); + + s->elcr = 0; + pic_reset_common(s); + + kvm_pic_put(s); +} + +static void kvm_pic_set_irq(void *opaque, int irq, int level) +{ + int delivered; + + delivered = kvm_set_irq(kvm_state, irq, level); + apic_report_irq_delivered(delivered); +} + +static void kvm_pic_realize(DeviceState *dev, Error **errp) +{ + PICCommonState *s = PIC_COMMON(dev); + KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev); + + memory_region_init_reservation(&s->base_io, NULL, "kvm-pic", 2); + memory_region_init_reservation(&s->elcr_io, NULL, "kvm-elcr", 1); + + kpc->parent_realize(dev, errp); +} + +qemu_irq *kvm_i8259_init(ISABus *bus) +{ + i8259_init_chip(TYPE_KVM_I8259, bus, true); + i8259_init_chip(TYPE_KVM_I8259, bus, false); + + return qemu_allocate_irqs(kvm_pic_set_irq, NULL, ISA_NUM_IRQS); +} + +static void kvm_i8259_class_init(ObjectClass *klass, void *data) +{ + KVMPICClass *kpc = KVM_PIC_CLASS(klass); + PICCommonClass *k = PIC_COMMON_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->reset = kvm_pic_reset; + kpc->parent_realize = dc->realize; + dc->realize = kvm_pic_realize; + k->pre_save = kvm_pic_get; + k->post_load = kvm_pic_put; +} + +static const TypeInfo kvm_i8259_info = { + .name = TYPE_KVM_I8259, + .parent = TYPE_PIC_COMMON, + .instance_size = sizeof(PICCommonState), + .class_init = kvm_i8259_class_init, + .class_size = sizeof(KVMPICClass), +}; + +static void kvm_pic_register_types(void) +{ + type_register_static(&kvm_i8259_info); +} + +type_init(kvm_pic_register_types) |
