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
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2.15.0
