linux-kernel - [PATCHv4 0/4] x86: 5-level related changes into decompression code

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Date:   Tue,  5 Dec 2017 16:59:38 +0300
From:   "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:     Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Cyrill Gorcunov <gorcunov@...nvz.org>,
        Borislav Petkov <bp@...e.de>, Andi Kleen <ak@...ux.intel.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv4 0/4] x86: 5-level related changes into decompression code

Hi,

Here's few changes to x86 decompression code.

The first patch fixes build regression introduced by my recent patch.
It only triggers when KASLR disabled and GCC version < 5. I haven't
noticed this before.

The second patch is pure cosmetic change: give file with KASLR helpers
a proper name.

The last two patches bring support of booting into 5-level paging mode if
a bootloader put the kernel above 4G.

Patch 3/4 handles allocation of space for trampoline and gets it prepared.
Patch 4/4 gets trampoline used.

Please review and consider applying.

Kirill A. Shutemov (4):
  x86/boot/compressed/64: Fix build with GCC < 5
  x86/boot/compressed/64: Rename pagetable.c to kaslr_64.c
  x86/boot/compressed/64: Introduce place_trampoline()
  x86/boot/compressed/64: Handle 5-level paging boot if kernel is above
    4G

 arch/x86/boot/compressed/Makefile                  |   2 +-
 arch/x86/boot/compressed/head_64.S                 | 130 +++++++++++++--------
 .../boot/compressed/{pagetable.c => kaslr_64.c}    |   3 -
 arch/x86/boot/compressed/pgtable.h                 |  18 +++
 arch/x86/boot/compressed/pgtable_64.c              |  75 ++++++++++--
 5 files changed, 163 insertions(+), 65 deletions(-)
 rename arch/x86/boot/compressed/{pagetable.c => kaslr_64.c} (97%)
 create mode 100644 arch/x86/boot/compressed/pgtable.h

-- 
2.15.0