[PATCHv5 0/3] x86: 5-level related changes into decompression code

[Kirill A. Shutemov]

Here's few changes to x86 decompression code.

The first patch is pure cosmetic change: it gives 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 2/3 handles allocation of space for trampoline and gets it prepared.
Patch 3/3 gets trampoline used.

Kirill A. Shutemov (3):
  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                 | 138 +++++++++++++--------
 .../boot/compressed/{pagetable.c => kaslr_64.c}    |   0
 arch/x86/boot/compressed/pgtable.h                 |  18 +++
 arch/x86/boot/compressed/pgtable_64.c              |  61 +++++++--
 5 files changed, 153 insertions(+), 66 deletions(-)
 rename arch/x86/boot/compressed/{pagetable.c => kaslr_64.c} (100%)
 create mode 100644 arch/x86/boot/compressed/pgtable.h

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2.15.0