KVM_SIGNATURE
if (!memcmp(&config, KVM_SIGNATURE, 4))
vcpu->arch.gprs[rd] = *(unsigned int *)KVM_SIGNATURE;
return cpuid_base_hypervisor(KVM_SIGNATURE, 0);
const u32 *sigptr = (const u32 *)KVM_SIGNATURE;
kvm_cpuid = kvm_get_hypervisor_cpuid(vcpu, KVM_SIGNATURE);