From: David Hildenbrand <d...@linux.vnet.ibm.com>
Usually, VCPU ids match the array index. So let's try a fast
lookup first before falling back to the slow iteration.
Suggested-by: Christian Borntraeger <borntrae...@de.ibm.com>
Reviewed-by: Dominik Dingel <din...@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntrae...@de.ibm.com>
Signed-off-by: David Hildenbrand <d...@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com>
---
include/linux/kvm_host.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 2911919..a754fc0 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -472,6 +472,11 @@ static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct
kvm *kvm, int id)
struct kvm_vcpu *vcpu;
int i;
+ if (id < 0 || id >= KVM_MAX_VCPUS)
+ return NULL;
+ vcpu = kvm_get_vcpu(kvm, id);
+ if (vcpu && vcpu->vcpu_id == id)
+ return vcpu;
kvm_for_each_vcpu(i, vcpu, kvm)
if (vcpu->vcpu_id == id)
return vcpu;
--
2.3.0
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