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‎02-08-2019 09:30 AM

HP Recommended
Product: EliteDesk 800 G3
Operating System: Microsoft Windows 10 (64-bit)

Hello - I am trying to enable the Kernel DMA Protection on EliteDesk 800 G3/G2 models with Windows 10 1809 installed. But it still says DMA Protection Off. Verified the Bios and it has Virtualization enabled too. so what am i missing here

DMAProtect1.JPG

1 person had the same question
2 REPLIES 2

‎03-12-2019 03:10 AM

HP Recommended

I have the same problem with an EliteBook 830 G5.

BIOS 01.06.00
Thunderbolt 3 FW 35

 

The value for  the DMA remapping GUID for Thunderbolt and USB Controllers in device manager is 00000000 where is should be 00000002.

 

See:

https://docs.microsoft.com/en-us/windows/security/information-protection/kernel-dma-protection-for-t...

 

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‎03-12-2019 04:41 AM

HP Recommended

I dumped the DMAR table of my EliteBook 830 G5.


Flags is 0x00000001

which means DMA_CTRL_PLATFORM_OPT_IN_FLAG (Bit 2) is not set!


@HP please provide a new BIOS which supports this feature.

 

https://software.intel.com/sites/default/files/managed/c5/15/vt-directed-io-spec.pdf

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