diff options
| -rw-r--r-- | include/linux/irqchip/arm-gic.h | 1 | ||||
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-mmio-v2.c | 46 | ||||
| -rw-r--r-- | virt/kvm/arm/vgic/vgic.c | 15 | ||||
| -rw-r--r-- | virt/kvm/arm/vgic/vgic.h | 4 |
4 files changed, 65 insertions, 1 deletions
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h index be0d26f940af..fd051855539b 100644 --- a/include/linux/irqchip/arm-gic.h +++ b/include/linux/irqchip/arm-gic.h @@ -33,6 +33,7 @@ #define GIC_DIST_CTRL 0x000 #define GIC_DIST_CTR 0x004 +#define GIC_DIST_IIDR 0x008 #define GIC_DIST_IGROUP 0x080 #define GIC_DIST_ENABLE_SET 0x100 #define GIC_DIST_ENABLE_CLEAR 0x180 diff --git a/virt/kvm/arm/vgic/vgic-mmio-v2.c b/virt/kvm/arm/vgic/vgic-mmio-v2.c index a3e31a93a3fb..d812c933708a 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v2.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v2.c @@ -20,9 +20,53 @@ #include "vgic.h" #include "vgic-mmio.h" +static unsigned long vgic_mmio_read_v2_misc(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len) +{ + u32 value; + + switch (addr & 0x0c) { + case GIC_DIST_CTRL: + value = vcpu->kvm->arch.vgic.enabled ? GICD_ENABLE : 0; + break; + case GIC_DIST_CTR: + value = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS; + value = (value >> 5) - 1; + value |= (atomic_read(&vcpu->kvm->online_vcpus) - 1) << 5; + break; + case GIC_DIST_IIDR: + value = (PRODUCT_ID_KVM << 24) | (IMPLEMENTER_ARM << 0); + break; + default: + return 0; + } + + return value; +} + +static void vgic_mmio_write_v2_misc(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len, + unsigned long val) +{ + struct vgic_dist *dist = &vcpu->kvm->arch.vgic; + bool was_enabled = dist->enabled; + + switch (addr & 0x0c) { + case GIC_DIST_CTRL: + dist->enabled = val & GICD_ENABLE; + if (!was_enabled && dist->enabled) + vgic_kick_vcpus(vcpu->kvm); + break; + case GIC_DIST_CTR: + case GIC_DIST_IIDR: + /* Nothing to do */ + return; + } +} + static const struct vgic_register_region vgic_v2_dist_registers[] = { REGISTER_DESC_WITH_LENGTH(GIC_DIST_CTRL, - vgic_mmio_read_raz, vgic_mmio_write_wi, 12, + vgic_mmio_read_v2_misc, vgic_mmio_write_v2_misc, 12, VGIC_ACCESS_32bit), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_IGROUP, vgic_mmio_read_rao, vgic_mmio_write_wi, 1, diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c index 7e010087224c..12ae84b4931f 100644 --- a/virt/kvm/arm/vgic/vgic.c +++ b/virt/kvm/arm/vgic/vgic.c @@ -545,3 +545,18 @@ int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu) return pending; } + +void vgic_kick_vcpus(struct kvm *kvm) +{ + struct kvm_vcpu *vcpu; + int c; + + /* + * We've injected an interrupt, time to find out who deserves + * a good kick... + */ + kvm_for_each_vcpu(c, vcpu, kvm) { + if (kvm_vgic_vcpu_pending_irq(vcpu)) + kvm_vcpu_kick(vcpu); + } +} diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h index fd9acaa1e305..cf620157e1e4 100644 --- a/virt/kvm/arm/vgic/vgic.h +++ b/virt/kvm/arm/vgic/vgic.h @@ -16,11 +16,15 @@ #ifndef __KVM_ARM_VGIC_NEW_H__ #define __KVM_ARM_VGIC_NEW_H__ +#define PRODUCT_ID_KVM 0x4b /* ASCII code K */ +#define IMPLEMENTER_ARM 0x43b + #define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS) struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 intid); bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq); +void vgic_kick_vcpus(struct kvm *kvm); void vgic_v2_process_maintenance(struct kvm_vcpu *vcpu); void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu); |