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Re: PCI DMA and security

To: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Subject: Re: PCI DMA and security
From: Rene Herman <rene.herman@xxxxxxxxxxxx>
Date: Fri, 01 Aug 2008 02:04:10 +0200
Cc: kernelnewbies@xxxxxxxxxxxx
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On 31-07-08 22:59, Thomas Petazzoni wrote:

Using that kind of hardware, the OS has control over which parts of the
physical memory is visible to a particular device. So the OS can
protect itself against malicious devices.

The IOMMU being broken is quite comparable to the device or (with his follow up) the legacy DMA controler being broken though, so we've only just now pushed the same answer a level up...

Rene.

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