static int kvm_max_vcpus(KVMState *s) { int ret; /* Find number of supported CPUs using the recommended * procedure from the kernel API documentation to cope with * older kernels that may be missing capabilities. */ ret = kvm_check_extension(s, KVM_CAP_MAX_VCPUS); if (ret) { return ret; } ret = kvm_check_extension(s, KVM_CAP_NR_VCPUS); if (ret) { return ret; } return 4; }