KVM: Keep an upper bound of initialized vcpus
That way, we don't need to loop for KVM_MAX_VCPUS for a single vcpu vm. Signed-off-by: Avi Kivity <avi@qumranet.com>
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@ -379,6 +379,7 @@ struct kvm {
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struct list_head active_mmu_pages;
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struct list_head active_mmu_pages;
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int n_free_mmu_pages;
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int n_free_mmu_pages;
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struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
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struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
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int nvcpus;
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struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
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struct kvm_vcpu vcpus[KVM_MAX_VCPUS];
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int memory_config_version;
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int memory_config_version;
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int busy;
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int busy;
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@ -2391,6 +2391,11 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
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if (r < 0)
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if (r < 0)
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goto out_free_vcpus;
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goto out_free_vcpus;
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spin_lock(&kvm_lock);
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if (n >= kvm->nvcpus)
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kvm->nvcpus = n + 1;
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spin_unlock(&kvm_lock);
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return r;
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return r;
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out_free_vcpus:
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out_free_vcpus:
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