diff options
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-mmio-v2.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v2.c b/virt/kvm/arm/vgic/vgic-mmio-v2.c index bb7389edadd3..52389ffbfffd 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v2.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v2.c @@ -64,6 +64,47 @@ static void vgic_mmio_write_v2_misc(struct kvm_vcpu *vcpu, } } +static unsigned long vgic_mmio_read_target(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len) +{ + u32 intid = VGIC_ADDR_TO_INTID(addr, 8); + int i; + u64 val = 0; + + for (i = 0; i < len; i++) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i); + + val |= (u64)irq->targets << (i * 8); + } + + return val; +} + +static void vgic_mmio_write_target(struct kvm_vcpu *vcpu, + gpa_t addr, unsigned int len, + unsigned long val) +{ + u32 intid = VGIC_ADDR_TO_INTID(addr, 8); + int i; + + /* GICD_ITARGETSR[0-7] are read-only */ + if (intid < VGIC_NR_PRIVATE_IRQS) + return; + + for (i = 0; i < len; i++) { + struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, NULL, intid + i); + int target; + + spin_lock(&irq->irq_lock); + + irq->targets = (val >> (i * 8)) & 0xff; + target = irq->targets ? __ffs(irq->targets) : 0; + irq->target_vcpu = kvm_get_vcpu(vcpu->kvm, target); + + spin_unlock(&irq->irq_lock); + } +} + static const struct vgic_register_region vgic_v2_dist_registers[] = { REGISTER_DESC_WITH_LENGTH(GIC_DIST_CTRL, vgic_mmio_read_v2_misc, vgic_mmio_write_v2_misc, 12, @@ -93,7 +134,7 @@ static const struct vgic_register_region vgic_v2_dist_registers[] = { vgic_mmio_read_priority, vgic_mmio_write_priority, 8, VGIC_ACCESS_32bit | VGIC_ACCESS_8bit), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_TARGET, - vgic_mmio_read_raz, vgic_mmio_write_wi, 8, + vgic_mmio_read_target, vgic_mmio_write_target, 8, VGIC_ACCESS_32bit | VGIC_ACCESS_8bit), REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_CONFIG, vgic_mmio_read_config, vgic_mmio_write_config, 2, |