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Merged PR 14960: added link to Partner center

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Justin Hall
2019-03-26 20:50:29 +00:00
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windows/security/information-protection/kernel-dma-protection-for-thunderbolt.md
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@ -6,8 +6,12 @@ ms.mktglfcycl: deploy
ms.sitesec: library
ms.pagetype: security
author: aadake
ms.date: 12/20/2018
ms.topic: article
ms.author: justinha
manager: dansimp
audience: ITPro
ms.collection: M365-security-compliance
ms.topic: conceptual
ms.date: 03/26/2019
---
# Kernel DMA Protection for Thunderbolt™ 3
@ -98,12 +102,12 @@ No, Kernel DMA Protection only protects against drive-by DMA attacks after the O
DMA-remapping is supported for specific device drivers, and is not universally supported by all devices and drivers on a platform. To check if a specific driver is opted into DMA-remapping, check the values corresponding to the DMA Remapping Policy property in the Details tab of a device in Device Manager*. A value of 0 or 1 means that the device driver does not support DMA-remapping. A value of 2 means that the device driver supports DMA-remapping.
Please check the driver instance for the device you are testing. Some drivers may have varying values depending on the location of the device (internal vs. external).
*For Windows 10 versions 1803 and 1809, the property field in Device Manager uses a GUID, as highlighted in the image below
*For Windows 10 versions 1803 and 1809, the property field in Device Manager uses a GUID, as highlighted in the following image.
![Kernel DMA protection user experience](images/device-details-tab.png)
### What should I do if the drivers for my Thunderbolt™ 3 peripherals do not support DMA-remapping?
If the peripherals do have class drivers provided by Windows 10, please use these drivers on your systems. If there are no class drivers provided by Windows for your peripherals, please contact your peripheral vendor/driver vendor to update the driver to support this functionality.
If the peripherals do have class drivers provided by Windows 10, please use these drivers on your systems. If there are no class drivers provided by Windows for your peripherals, please contact your peripheral vendor/driver vendor to update the driver to support this functionality. Details for driver compatibility requirements can be found at the [Microsoft Partner Center](https://partner.microsoft.com/dashboard/collaborate/packages/4142).
### Do Microsoft drivers support DMA-remapping?
In Windows 10 1803 and beyond, the Microsoft inbox drivers for USB XHCI (3.x) Controllers, Storage AHCI/SATA Controllers and Storage NVMe Controllers support DMA-remapping.