topic about vt-d in Mobile and Desktop Processors

about vt-d

wmirr — Fri, 21 Mar 2014 07:10:15 GMT

hi, the vt-d is very complicate.

is there any sample code could help me to implment the dma-remapping in my system?

my processor is i7 2600.

thanks.

Kevin_M_Intel — Mon, 24 Mar 2014 16:51:33 GMT

Hi watermirror,

Can you confirm if you are referring to a code to modify the DMA on the processor? I mean changing the configuration on it?

Here is some information you can find very helpful:

wmirr — Tue, 25 Mar 2014 07:40:14 GMT

Hi kevin,

My goal is to prevent some part of memory from being destroied by DMA access.

I have already read the

But I still do not know how to start code.I can understand the table which remaped dma.

But how could I assign device to certain guest(or VM), how could I know if there any access volating the dma remaping table?

Is there any more document I should read?

Kevin_M_Intel — Thu, 27 Mar 2014 16:39:11 GMT

I will verify this with the development team. Let me check and I will be back with more information.

Kevin_M_Intel — Wed, 16 Apr 2014 18:46:55 GMT

Hello watermirror,

I am sorry for the delay and I appreciate your patience.

Based on the research, there is a link that contains very detail information that can help you with your task. Here is it:

With this, you should not need to do any programming. Let me know if it works.