Example #1
0
static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
{
	struct kvm *kvm = vcpu->kvm;
	int ret;

	if (likely(vcpu->arch.has_run_once))
		return 0;

	vcpu->arch.has_run_once = true;

	/*
	 * Map the VGIC hardware resources before running a vcpu the first
	 * time on this VM.
	 */
	if (unlikely(irqchip_in_kernel(kvm) && !vgic_ready(kvm))) {
		ret = kvm_vgic_map_resources(kvm);
		if (ret)
			return ret;
	}

	/*
	 * Enable the arch timers only if we have an in-kernel VGIC
	 * and it has been properly initialized, since we cannot handle
	 * interrupts from the virtual timer with a userspace gic.
	 */
	if (irqchip_in_kernel(kvm) && vgic_initialized(kvm))
		kvm_timer_enable(kvm);

	return 0;
}
Example #2
0
File: arm.c Project: mdamt/linux
static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
{
	struct kvm *kvm = vcpu->kvm;
	int ret = 0;

	if (likely(vcpu->arch.has_run_once))
		return 0;

	vcpu->arch.has_run_once = true;

	/*
	 * Map the VGIC hardware resources before running a vcpu the first
	 * time on this VM.
	 */
	if (unlikely(irqchip_in_kernel(kvm) && !vgic_ready(kvm))) {
		ret = kvm_vgic_map_resources(kvm);
		if (ret)
			return ret;
	}

	ret = kvm_timer_enable(vcpu);
	if (ret)
		return ret;

	ret = kvm_arm_pmu_v3_enable(vcpu);

	return ret;
}
Example #3
0
static int vgic_set_common_attr(struct kvm_device *dev,
				struct kvm_device_attr *attr)
{
	int r;

	switch (attr->group) {
	case KVM_DEV_ARM_VGIC_GRP_ADDR: {
		u64 __user *uaddr = (u64 __user *)(long)attr->addr;
		u64 addr;
		unsigned long type = (unsigned long)attr->attr;

		if (copy_from_user(&addr, uaddr, sizeof(addr)))
			return -EFAULT;

		r = kvm_vgic_addr(dev->kvm, type, &addr, true);
		return (r == -ENODEV) ? -ENXIO : r;
	}
	case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: {
		u32 __user *uaddr = (u32 __user *)(long)attr->addr;
		u32 val;
		int ret = 0;

		if (get_user(val, uaddr))
			return -EFAULT;

		/*
		 * We require:
		 * - at least 32 SPIs on top of the 16 SGIs and 16 PPIs
		 * - at most 1024 interrupts
		 * - a multiple of 32 interrupts
		 */
		if (val < (VGIC_NR_PRIVATE_IRQS + 32) ||
		    val > VGIC_MAX_RESERVED ||
		    (val & 31))
			return -EINVAL;

		mutex_lock(&dev->kvm->lock);

		if (vgic_ready(dev->kvm) || dev->kvm->arch.vgic.nr_spis)
			ret = -EBUSY;
		else
			dev->kvm->arch.vgic.nr_spis =
				val - VGIC_NR_PRIVATE_IRQS;

		mutex_unlock(&dev->kvm->lock);

		return ret;
	}
	case KVM_DEV_ARM_VGIC_GRP_CTRL: {
		switch (attr->attr) {
		case KVM_DEV_ARM_VGIC_CTRL_INIT:
			mutex_lock(&dev->kvm->lock);
			r = vgic_init(dev->kvm);
			mutex_unlock(&dev->kvm->lock);
			return r;
		}
		break;
	}
	}

	return -ENXIO;
}