Пример #1
0
static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
				      struct kvm_s390_interrupt_info *inti)
{
	switch (inti->type) {
	case KVM_S390_INT_EMERGENCY:
		if (psw_extint_disabled(vcpu))
			return 0;
		if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
			return 1;
		return 0;
	case KVM_S390_INT_SERVICE:
		if (psw_extint_disabled(vcpu))
			return 0;
		if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
			return 1;
		return 0;
	case KVM_S390_INT_VIRTIO:
		if (psw_extint_disabled(vcpu))
			return 0;
		if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
			return 1;
		return 0;
	case KVM_S390_PROGRAM_INT:
	case KVM_S390_SIGP_STOP:
	case KVM_S390_SIGP_SET_PREFIX:
	case KVM_S390_RESTART:
		return 1;
	default:
		BUG();
	}
	return 0;
}
Пример #2
0
static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
{
    int rc, exception = 0;

    if (psw_extint_disabled(vcpu))
        return 0;
    if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
        return 0;
    rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1004);
    if (rc == -EFAULT)
        exception = 1;
    rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
                       &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
    if (rc == -EFAULT)
        exception = 1;
    rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
                         __LC_EXT_NEW_PSW, sizeof(psw_t));
    if (rc == -EFAULT)
        exception = 1;
    if (exception) {
        printk("kvm: The guest lowcore is not mapped during interrupt "
               "delivery, killing userspace\n");
        do_exit(SIGKILL);
    }
    return 1;
}
Пример #3
0
static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
{
	if (psw_extint_disabled(vcpu) ||
	    !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
		return 0;
	if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
		/* No timer interrupts when single stepping */
		return 0;
	return 1;
}
Пример #4
0
static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
				      struct kvm_s390_interrupt_info *inti)
{
	switch (inti->type) {
	case KVM_S390_INT_EMERGENCY:
	case KVM_S390_INT_SERVICE:
	case KVM_S390_INT_VIRTIO:
		if (psw_extint_disabled(vcpu))
			__set_cpuflag(vcpu, CPUSTAT_EXT_INT);
		else
			vcpu->arch.sie_block->lctl |= LCTL_CR0;
		break;
	case KVM_S390_SIGP_STOP:
		__set_cpuflag(vcpu, CPUSTAT_STOP_INT);
		break;
	default:
		BUG();
	}
}