Re: [PATCH 00/10] Enhance /dev/mem to allow read/write of arbitraryphysical addresses

From: Ingo Molnar
Date: Mon Jun 20 2011 - 03:41:53 EST

* H. Peter Anvin <hpa@xxxxxxxxx> wrote:

> There are some test drivers which really want /dev/mem to work.

Test drivers and test hardware with zero enumeration can use below 4G
addresses just fine.

Also, debugging is not an issue and some non-default kernel or boot
option can enable any sort of device i guess, so my main worry isnt
really security but that we should stand in the way of the apparent
practice of *shipping* user-space drivers that use /dev/mem ...


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