---
title: DeviceEnumerationPolicy enum | Wartiva GraphQL API
description: GPO policy: "Enumeration policy for external devices incompatible with Kernel DMA Protection". Wartiva GraphQL API reference with arguments, fields, and examples.
url: https://wartiva.com/api-docs/types/device-enumeration-policy.html
updated: 2026-10-07
---

Endpoint configuration · GraphQL enum

# `DeviceEnumerationPolicy` enum

GPO policy: "Enumeration policy for external devices incompatible with Kernel DMA Protection" under Computer Configuration > Administrative Templates > System > Kernel DMA Protection. Controls when externally connected Thunderbolt/PCIe DMA-capable devices may be enumerated relative to user login state, protecting against DMA attacks from physical access. Registry: HKLM\SOFTWARE\Policies\Microsoft\Windows\Kernel DMAProtection:DeviceEnumerationPolicy (REG_DWORD). Reference: [Policy CSP - DmaGuard](https://learn.microsoft.com/en-us/windows/client-management/mdm/policy-csp-dmaguard)

## Values

| Enum Value | Description |
|---|---|
| `BLOCK_ALL` | Block all external DMA-capable devices (registry value 0). No external DMA devices are enumerated unless they are DMA-remapping compatible. Most restrictive; recommended for high-security environments. |
| `ONLY_WHILE_LOGGED_IN` | Allow device enumeration only while a user is logged in (registry value 1). External DMA devices incompatible with Kernel DMA Protection are enumerated only after a user has logged on to the system. |
| `ALLOW_ALL` | Allow enumeration of all devices at any time (registry value 2, default). External DMA devices can be enumerated at any time, including at the lock screen. Least restrictive. |

## Used by

- [`ComputerAdministrativeTemplates`](https://wartiva.com/api-docs/types/computer-administrative-templates.html) type: Computer-specific Administrative Templates (ADMX) settings on an Endpoint.

## Example

### Example

```json
"BLOCK_ALL"

```

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