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;
}
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;
}
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;
}
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();
}
}