lkml.org 
[lkml]   [2009]   [Nov]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Reading /dev/mem by dd
On Thu, Nov 12, 2009 at 10:07:22PM +0100, Krzysztof Halasa wrote:
> "Henrique de Moraes Holschuh" <hmh@hmh.eng.br> writes:
>
> > In this case, the problem seems to be access over /dev/mem to stuff the
> > kernel is already taking care of.
>
> Not sure if local APIC counts as "PCI space and the BIOS code and data
> regions" but:
>
> $ grep STRICT_DEVMEM -A 15 arch/x86/Kconfig.debug
> config STRICT_DEVMEM
> bool "Filter access to /dev/mem"
> ---help---
>

Yes, having this option turned on an access to LAPIC/IO_APIC
space will be forbidden.

-- Cyrill


\
 
 \ /
  Last update: 2009-11-12 22:31    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site