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author | Paolo Bonzini <pbonzini@redhat.com> | 2013-02-05 16:12:12 +0100 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-04-08 18:13:16 +0200 |
commit | 7702e47c21e9e7c9962a25de03caa999ea4cd2ea (patch) | |
tree | 743d21340fcd4e45df99c61c875bfbf9a3eb56cb /hw/intc/arm_gic_kvm.c | |
parent | d2c0bd845847820e4abd99638aa2e9b90611a5bf (diff) | |
download | hqemu-7702e47c21e9e7c9962a25de03caa999ea4cd2ea.zip hqemu-7702e47c21e9e7c9962a25de03caa999ea4cd2ea.tar.gz |
hw: move interrupt controllers to hw/intc/, configure with default-configs/
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/intc/arm_gic_kvm.c')
-rw-r--r-- | hw/intc/arm_gic_kvm.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/hw/intc/arm_gic_kvm.c b/hw/intc/arm_gic_kvm.c new file mode 100644 index 0000000..22b40b4 --- /dev/null +++ b/hw/intc/arm_gic_kvm.c @@ -0,0 +1,167 @@ +/* + * ARM Generic Interrupt Controller using KVM in-kernel support + * + * Copyright (c) 2012 Linaro Limited + * Written by Peter Maydell + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "hw/sysbus.h" +#include "sysemu/kvm.h" +#include "kvm_arm.h" +#include "hw/arm_gic_internal.h" + +#define TYPE_KVM_ARM_GIC "kvm-arm-gic" +#define KVM_ARM_GIC(obj) \ + OBJECT_CHECK(GICState, (obj), TYPE_KVM_ARM_GIC) +#define KVM_ARM_GIC_CLASS(klass) \ + OBJECT_CLASS_CHECK(KVMARMGICClass, (klass), TYPE_KVM_ARM_GIC) +#define KVM_ARM_GIC_GET_CLASS(obj) \ + OBJECT_GET_CLASS(KVMARMGICClass, (obj), TYPE_KVM_ARM_GIC) + +typedef struct KVMARMGICClass { + ARMGICCommonClass parent_class; + DeviceRealize parent_realize; + void (*parent_reset)(DeviceState *dev); +} KVMARMGICClass; + +static void kvm_arm_gic_set_irq(void *opaque, int irq, int level) +{ + /* Meaning of the 'irq' parameter: + * [0..N-1] : external interrupts + * [N..N+31] : PPI (internal) interrupts for CPU 0 + * [N+32..N+63] : PPI (internal interrupts for CPU 1 + * ... + * Convert this to the kernel's desired encoding, which + * has separate fields in the irq number for type, + * CPU number and interrupt number. + */ + GICState *s = (GICState *)opaque; + int kvm_irq, irqtype, cpu; + + if (irq < (s->num_irq - GIC_INTERNAL)) { + /* External interrupt. The kernel numbers these like the GIC + * hardware, with external interrupt IDs starting after the + * internal ones. + */ + irqtype = KVM_ARM_IRQ_TYPE_SPI; + cpu = 0; + irq += GIC_INTERNAL; + } else { + /* Internal interrupt: decode into (cpu, interrupt id) */ + irqtype = KVM_ARM_IRQ_TYPE_PPI; + irq -= (s->num_irq - GIC_INTERNAL); + cpu = irq / GIC_INTERNAL; + irq %= GIC_INTERNAL; + } + kvm_irq = (irqtype << KVM_ARM_IRQ_TYPE_SHIFT) + | (cpu << KVM_ARM_IRQ_VCPU_SHIFT) | irq; + + kvm_set_irq(kvm_state, kvm_irq, !!level); +} + +static void kvm_arm_gic_put(GICState *s) +{ + /* TODO: there isn't currently a kernel interface to set the GIC state */ +} + +static void kvm_arm_gic_get(GICState *s) +{ + /* TODO: there isn't currently a kernel interface to get the GIC state */ +} + +static void kvm_arm_gic_reset(DeviceState *dev) +{ + GICState *s = ARM_GIC_COMMON(dev); + KVMARMGICClass *kgc = KVM_ARM_GIC_GET_CLASS(s); + + kgc->parent_reset(dev); + kvm_arm_gic_put(s); +} + +static void kvm_arm_gic_realize(DeviceState *dev, Error **errp) +{ + int i; + GICState *s = KVM_ARM_GIC(dev); + SysBusDevice *sbd = SYS_BUS_DEVICE(dev); + KVMARMGICClass *kgc = KVM_ARM_GIC_GET_CLASS(s); + + kgc->parent_realize(dev, errp); + if (error_is_set(errp)) { + return; + } + + i = s->num_irq - GIC_INTERNAL; + /* For the GIC, also expose incoming GPIO lines for PPIs for each CPU. + * GPIO array layout is thus: + * [0..N-1] SPIs + * [N..N+31] PPIs for CPU 0 + * [N+32..N+63] PPIs for CPU 1 + * ... + */ + i += (GIC_INTERNAL * s->num_cpu); + qdev_init_gpio_in(dev, kvm_arm_gic_set_irq, i); + /* We never use our outbound IRQ lines but provide them so that + * we maintain the same interface as the non-KVM GIC. + */ + for (i = 0; i < s->num_cpu; i++) { + sysbus_init_irq(sbd, &s->parent_irq[i]); + } + /* Distributor */ + memory_region_init_reservation(&s->iomem, "kvm-gic_dist", 0x1000); + sysbus_init_mmio(sbd, &s->iomem); + kvm_arm_register_device(&s->iomem, + (KVM_ARM_DEVICE_VGIC_V2 << KVM_ARM_DEVICE_ID_SHIFT) + | KVM_VGIC_V2_ADDR_TYPE_DIST); + /* CPU interface for current core. Unlike arm_gic, we don't + * provide the "interface for core #N" memory regions, because + * cores with a VGIC don't have those. + */ + memory_region_init_reservation(&s->cpuiomem[0], "kvm-gic_cpu", 0x1000); + sysbus_init_mmio(sbd, &s->cpuiomem[0]); + kvm_arm_register_device(&s->cpuiomem[0], + (KVM_ARM_DEVICE_VGIC_V2 << KVM_ARM_DEVICE_ID_SHIFT) + | KVM_VGIC_V2_ADDR_TYPE_CPU); +} + +static void kvm_arm_gic_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + ARMGICCommonClass *agcc = ARM_GIC_COMMON_CLASS(klass); + KVMARMGICClass *kgc = KVM_ARM_GIC_CLASS(klass); + + agcc->pre_save = kvm_arm_gic_get; + agcc->post_load = kvm_arm_gic_put; + kgc->parent_realize = dc->realize; + kgc->parent_reset = dc->reset; + dc->realize = kvm_arm_gic_realize; + dc->reset = kvm_arm_gic_reset; + dc->no_user = 1; +} + +static const TypeInfo kvm_arm_gic_info = { + .name = TYPE_KVM_ARM_GIC, + .parent = TYPE_ARM_GIC_COMMON, + .instance_size = sizeof(GICState), + .class_init = kvm_arm_gic_class_init, + .class_size = sizeof(KVMARMGICClass), +}; + +static void kvm_arm_gic_register_types(void) +{ + type_register_static(&kvm_arm_gic_info); +} + +type_init(kvm_arm_gic_register_types) |