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KVM: s390: refactor vcpu injection function 

Let's provide a version of kvm_s390_inject_vcpu() that
does not acquire the local-interrupt lock and skips
waking up the vcpu.
To be used in a later patch for vcpu-local interrupt migration,
where we are already holding the lock.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Jens Freimann 2015-03-19 15:12:12 +01:00 committed by Christian Borntraeger
parent 47b43c52ee
commit 79e87a103d
1 changed files with 12 additions and 3 deletions
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15
arch/s390/kvm/interrupt.c
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@ -1514,12 +1514,10 @@ void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
spin_unlock(&li->lock);
}
int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
{
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
int rc;
spin_lock(&li->lock);
switch (irq->type) {
case KVM_S390_PROGRAM_INT:
VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
@ -1559,6 +1557,17 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
default:
rc = -EINVAL;
}
return rc;
}
int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
{
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
int rc;
spin_lock(&li->lock);
rc = do_inject_vcpu(vcpu, irq);
spin_unlock(&li->lock);
if (!rc)
kvm_s390_vcpu_wakeup(vcpu);