RE: NonExecutable Bit in 32Bit
From: Cestonaro, Thilo \(external\)
Date: Wed Apr 25 2007 - 02:59:15 EST
> > > > CONFIG_HIGHMEM64G=y
> > > > CONFIG_HIGHMEM=y
> > > > CONFIG_X86_PAE=y
> > >
> > > Ok in highmem it's active, whats about lowmem?
> > > x86-64 is NX active for lowmem too AFAIK.
> > It's more of an issue of having PAE enabled.
> > Without PAE you are not able to use the the NX bit.
> That's the way the CPU works, not Linux.
> Forgot to add:
> from arch/i386/Kconfig:
> config X86_PAE
> depends on HIGHMEM64G
> default y
> select RESOURCES_64BIT
> > Hope this helps.
Just that I get it right, NX just works with PAE enabled, and PAE just works with HIGHMEM64G enabled.
And this prevents the lowmemory to be secured by NX?
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