KVM: Provide function for VCPU lookup by id

Let's provide a function to lookup a VCPU by id.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[split patch from refactoring patch]

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 5706a21..c923350 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -460,6 +460,17 @@ static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
             (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
             idx++)
 
+static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
+{
+       struct kvm_vcpu *vcpu;
+       int i;
+
+       kvm_for_each_vcpu(i, vcpu, kvm)
+               if (vcpu->vcpu_id == id)
+                       return vcpu;
+       return NULL;
+}
+
 #define kvm_for_each_memslot(memslot, slots)   \
        for (memslot = &slots->memslots[0];     \
              memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\