Re: [PATCH] x86: introduce /dev/mem restrictions with a config option

[H. Peter Anvin]

Jesse Barnes wrote:
> > > This is more for compatibility with legacy X
> > Legacy X, and non-BAR X memory (originally ISA, of course; now
> > probably more often "stolen system memory").
>
> For legacy memory, we actually have /sys/bus/pci/<busno>/legacy_mem 
> (though ia64 may be the only supported platform).  It's actually 
> required on some arches due to the way this space is allocated across 
> the system.

Well, it's certainly not under /sys/bus/pci on x86 systems...

	-hpa
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