linux-kernel - Re: [PATCHv3 15/33] x86/efi: handle p4d in EFI pagetables

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Date:   Tue, 28 Feb 2017 12:38:30 +0000
From:   Matt Fleming <matt@...eblueprint.co.uk>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Arnd Bergmann <arnd@...db.de>,
        "H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Andy Lutomirski <luto@...capital.net>,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 15/33] x86/efi: handle p4d in EFI pagetables

On Fri, 17 Feb, at 05:13:10PM, Kirill A. Shutemov wrote:
> Allocate additional page table level and change efi_sync_low_kernel_mappings()
> to make syncing logic work with additional page table level.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Cc: Matt Fleming <matt@...eblueprint.co.uk>
> ---
>  arch/x86/platform/efi/efi_64.c | 33 +++++++++++++++++++++++----------
>  1 file changed, 23 insertions(+), 10 deletions(-)

Looks fine to me, but I haven't tested it.

Reviewed-by: Matt Fleming <matt@...eblueprint.co.uk>