KVM: SVM: Add support for SEV LAUNCH_SECRET command

	return ret;

}

static int sev_launch_secret(struct kvm *kvm, struct kvm_sev_cmd *argp)

{

	struct kvm_sev_info *sev = &kvm->arch.sev_info;

	struct sev_data_launch_secret *data;

	struct kvm_sev_launch_secret params;

	struct page **pages;

	void *blob, *hdr;

	unsigned long n;

	int ret;

	if (!sev_guest(kvm))

		return -ENOTTY;

	if (copy_from_user(&params, (void __user *)(uintptr_t)argp->data, sizeof(params)))

		return -EFAULT;

	pages = sev_pin_memory(kvm, params.guest_uaddr, params.guest_len, &n, 1);

	if (!pages)

		return -ENOMEM;

	/*

	 * The secret must be copied into contiguous memory region, lets verify

	 * that userspace memory pages are contiguous before we issue command.

	 */

	if (get_num_contig_pages(0, pages, n) != n) {

		ret = -EINVAL;

		goto e_unpin_memory;

	}

	ret = -ENOMEM;

	data = kzalloc(sizeof(*data), GFP_KERNEL);

	if (!data)

		goto e_unpin_memory;

	blob = psp_copy_user_blob(params.trans_uaddr, params.trans_len);

	if (IS_ERR(blob)) {

		ret = PTR_ERR(blob);

		goto e_free;

	}

	data->trans_address = __psp_pa(blob);

	data->trans_len = params.trans_len;

	hdr = psp_copy_user_blob(params.hdr_uaddr, params.hdr_len);

	if (IS_ERR(hdr)) {

		ret = PTR_ERR(hdr);

		goto e_free_blob;

	}

	data->trans_address = __psp_pa(blob);

	data->trans_len = params.trans_len;

	data->handle = sev->handle;

	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_SECRET, data, &argp->error);

	kfree(hdr);

e_free_blob:

	kfree(blob);

e_free:

	kfree(data);

e_unpin_memory:

	sev_unpin_memory(kvm, pages, n);

	return ret;

}

static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)

{

	struct kvm_sev_cmd sev_cmd;

	case KVM_SEV_DBG_ENCRYPT:

		r = sev_dbg_crypt(kvm, &sev_cmd, false);

		break;

	case KVM_SEV_LAUNCH_SECRET:

		r = sev_launch_secret(kvm, &sev_cmd);

		break;

	default:

		r = -EINVAL;

		goto out;