Re: [PATCHv2 1/3] x86, ptdump: Add section for EFI runtime services

[Borislav Petkov]

On Tue, Oct 28, 2014 at 10:49:36PM +0100, Mathias Krause wrote:
> Sync only data or kernel code, too?

Data only should be enough.

> Really, I'd just map the EFI RT service virtual mappings "somewhere"
> but at pgd[511] and have pgd[511] initially set up as
> init_level4_pgt[511]. Then, thing should "just work"(TM).

Nah, nothing with EFI just works :-)

> If you fear the EFI code might do harm to the kernel code/data, then
> you've lost anyway. Nothing will prevent the EFI code from doing nasty
> things -- like setting up its own mappings to tamper with the kernel's
> memory.

Sure, nothing would surprise me anymore. However, I'd prefer to not be
an enabler. :)

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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