Re: [CFT] ELF Relocatable x86 and x86_64 bzImages

From: Andi Kleen
Date: Sun Aug 13 2006 - 16:04:25 EST

ebiederm@xxxxxxxxxxxx (Eric W. Biederman) writes:
> Do you know what code had problems having _PAGE_NX set.
> What are we doing with early_ioremap the requires execute
> permissions. It doesn't sound right that we would need
> this.

The early EM64T CPUs didn't support NX and would GPF when
they hit the bit. That is why you always need to mask
with __supported_pte_mask when using _PAGE_NX.

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