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

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* 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
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[GIT PULL v4 0/6] EFI page table isolation Matt Fleming <matt@codeblueprint.co.uk> - 2015-11-27 22:10 +0100
  [PATCH v4 3/6] x86/efi: Map RAM into the identity page table for mixed mode Matt Fleming <matt@codeblueprint.co.uk> - 2015-11-27 22:10 +0100
    [tip:x86/efi] x86/efi:   Map RAM into the identity page table for mixed mode tip-bot for Matt Fleming <tipbot@zytor.com> - 2015-11-29 10:10 +0100
  [PATCH v4 2/6] x86/mm/pageattr: Ensure cpa->pfn only contains page frame numbers Matt Fleming <matt@codeblueprint.co.uk> - 2015-11-27 22:20 +0100
    [tip:x86/efi] x86/mm/pat: Ensure cpa->  pfn only contains page frame numbers tip-bot for Matt Fleming <tipbot@zytor.com> - 2015-11-29 10:10 +0100
  [PATCH v4 4/6] x86/efi: Hoist page table switching code into efi_call_virt() Matt Fleming <matt@codeblueprint.co.uk> - 2015-11-27 22:20 +0100
    [tip:x86/efi] x86/efi:   Hoist page table switching code into efi_call_virt() tip-bot for Matt Fleming <tipbot@zytor.com> - 2015-11-29 10:10 +0100
  [PATCH v4 6/6] Documentation/x86: Update EFI memory region description Matt Fleming <matt@codeblueprint.co.uk> - 2015-11-27 22:20 +0100
    [tip:x86/efi] Documentation/x86:   Update EFI memory region description tip-bot for Matt Fleming <tipbot@zytor.com> - 2015-11-29 10:10 +0100
  [PATCH v4 1/6] x86: Page align _end to avoid pfn conversion bugs Matt Fleming <matt@codeblueprint.co.uk> - 2015-11-27 22:20 +0100
    [tip:x86/efi] x86/mm: Page align the '_end'   symbol to avoid pfn conversion bugs tip-bot for Matt Fleming <tipbot@zytor.com> - 2015-11-29 10:10 +0100
  [PATCH v4 5/6] x86/efi: Build our own page table structures Matt Fleming <matt@codeblueprint.co.uk> - 2015-11-27 22:20 +0100
    [tip:x86/efi] x86/efi: Build our own page table structures tip-bot for Matt Fleming <tipbot@zytor.com> - 2015-11-29 10:10 +0100
  Re: [GIT PULL v4 0/6] EFI page table isolation Ingo Molnar <mingo@kernel.org> - 2015-11-29 09:20 +0100

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