[PATCH -v2] EFI: Runtime services virtual mapping

[Borislav Petkov]

On Thu, Sep 19, 2013 at 04:54:54PM +0200, Borislav Petkov wrote:
> From: Borislav Petkov <bp@xxxxxxx>
> 
> We map the EFI regions needed for runtime services contiguously on
> virtual addresses starting from -4G down for a total max space of 64G.
> This way, we provide for stable runtime services addresses across
> kernels so that a kexec'd kernel can still use them.
> 
> This way, they're mapped in a separate pagetable so that we don't
> pollute the kernel namespace (you can see how the whole ioremapping and
> saving and restoring of PGDs is gone now).

Ok, this one was not so good, let's try again:

This time I saved 32-bit and am switching the pagetable only after
having built it properly. This boots fine again on baremetal and on OVMF
with Matt's handover flags fix from yesterday.

Also, I've uploaded the whole series to
git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git, branch
efi-experimental

("-experimental" doesn't trigger Fengguang's robot :-))

Good luck! :-)

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