Re: [GIT PULL v4 0/6] EFI page table isolation

[Ingo Molnar <mingo@kernel.org>]

* Matt Fleming <matt@codeblueprint.co.uk> wrote:

> Folks,
> 
> This patch series is a response to the report that the EFI region
> mappings trigger warnings when booting with CONFIG_DEBUG_WX enabled.
> They allocate a new page table structure and ensure that all the
> mappings we require during EFI runtime calls are only setup there.
> 
> It turns out that it still makes sense to share some page table
> entries with 'swapper_pg_dir', just not the entries where we need to
> allow security lax permissions. Sharing entries is useful for memory
> hotplug, for example.
> 
> When writing this series I discovered a number of bugs in the existing
> code that only became apparent when we stopped using 'trampoline_pgd'
> which already mapped a bunch of things for us. I've put those bug
> fixes at the start of the series.
> 
> Further testing would be very much appreciated as this is a
> notoriously funky area of the EFI code.

Ok, this series looks great to me - I've applied this to tip:x86/efi and will push 
it out to linux-next after it passes some local testing.

There should be time enough before v4.5 to figure out potential bugs.

Thanks,

	Ingo