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Diffstat (limited to 'arch/s390/kvm/sigp.c')
-rw-r--r--arch/s390/kvm/sigp.c45
1 files changed, 44 insertions, 1 deletions
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index d6a50c1fb2e6..f815118835f3 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -87,6 +87,7 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
return -ENOMEM;
inti->type = KVM_S390_INT_EMERGENCY;
+ inti->emerg.code = vcpu->vcpu_id;
spin_lock(&fi->lock);
li = fi->local_int[cpu_addr];
@@ -103,9 +104,47 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
wake_up_interruptible(&li->wq);
spin_unlock_bh(&li->lock);
rc = 0; /* order accepted */
+ VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
+unlock:
+ spin_unlock(&fi->lock);
+ return rc;
+}
+
+static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
+{
+ struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
+ struct kvm_s390_local_interrupt *li;
+ struct kvm_s390_interrupt_info *inti;
+ int rc;
+
+ if (cpu_addr >= KVM_MAX_VCPUS)
+ return 3; /* not operational */
+
+ inti = kzalloc(sizeof(*inti), GFP_KERNEL);
+ if (!inti)
+ return -ENOMEM;
+
+ inti->type = KVM_S390_INT_EXTERNAL_CALL;
+ inti->extcall.code = vcpu->vcpu_id;
+
+ spin_lock(&fi->lock);
+ li = fi->local_int[cpu_addr];
+ if (li == NULL) {
+ rc = 3; /* not operational */
+ kfree(inti);
+ goto unlock;
+ }
+ spin_lock_bh(&li->lock);
+ list_add_tail(&inti->list, &li->list);
+ atomic_set(&li->active, 1);
+ atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
+ if (waitqueue_active(&li->wq))
+ wake_up_interruptible(&li->wq);
+ spin_unlock_bh(&li->lock);
+ rc = 0; /* order accepted */
+ VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
unlock:
spin_unlock(&fi->lock);
- VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
return rc;
}
@@ -267,6 +306,10 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
rc = __sigp_sense(vcpu, cpu_addr,
&vcpu->arch.guest_gprs[r1]);
break;
+ case SIGP_EXTERNAL_CALL:
+ vcpu->stat.instruction_sigp_external_call++;
+ rc = __sigp_external_call(vcpu, cpu_addr);
+ break;
case SIGP_EMERGENCY:
vcpu->stat.instruction_sigp_emergency++;
rc = __sigp_emergency(vcpu, cpu_addr);