static int ne_start_enclave_ioctl()

in drivers/virt/nitro_enclaves/ne_misc_dev.c [1156:1216]

• 47 lines of code
• 7 McCabe index (conditional complexity)

static int ne_start_enclave_ioctl(struct ne_enclave *ne_enclave,
				  struct ne_enclave_start_info *enclave_start_info)
{
	struct ne_pci_dev_cmd_reply cmd_reply = {};
	unsigned int cpu = 0;
	struct enclave_start_req enclave_start_req = {};
	unsigned int i = 0;
	struct pci_dev *pdev = ne_devs.ne_pci_dev->pdev;
	int rc = -EINVAL;

	if (!ne_enclave->nr_mem_regions) {
		dev_err_ratelimited(ne_misc_dev.this_device,
				    "Enclave has no mem regions\n");

		return -NE_ERR_NO_MEM_REGIONS_ADDED;
	}

	if (ne_enclave->mem_size < NE_MIN_ENCLAVE_MEM_SIZE) {
		dev_err_ratelimited(ne_misc_dev.this_device,
				    "Enclave memory is less than %ld\n",
				    NE_MIN_ENCLAVE_MEM_SIZE);

		return -NE_ERR_ENCLAVE_MEM_MIN_SIZE;
	}

	if (!ne_enclave->nr_vcpus) {
		dev_err_ratelimited(ne_misc_dev.this_device,
				    "Enclave has no vCPUs\n");

		return -NE_ERR_NO_VCPUS_ADDED;
	}

	for (i = 0; i < ne_enclave->nr_parent_vm_cores; i++)
		for_each_cpu(cpu, ne_enclave->threads_per_core[i])
			if (!cpumask_test_cpu(cpu, ne_enclave->vcpu_ids)) {
				dev_err_ratelimited(ne_misc_dev.this_device,
						    "Full CPU cores not used\n");

				return -NE_ERR_FULL_CORES_NOT_USED;
			}

	enclave_start_req.enclave_cid = enclave_start_info->enclave_cid;
	enclave_start_req.flags = enclave_start_info->flags;
	enclave_start_req.slot_uid = ne_enclave->slot_uid;

	rc = ne_do_request(pdev, ENCLAVE_START,
			   &enclave_start_req, sizeof(enclave_start_req),
			   &cmd_reply, sizeof(cmd_reply));
	if (rc < 0) {
		dev_err_ratelimited(ne_misc_dev.this_device,
				    "Error in enclave start [rc=%d]\n", rc);

		return rc;
	}

	ne_enclave->state = NE_STATE_RUNNING;

	enclave_start_info->enclave_cid = cmd_reply.enclave_cid;

	return 0;
}