Here's updated version the fourth and the last bunch of of patches that brings initial 5-level paging enabling. Please review and consider applying. The situation with assembly hasn't changed much. I still not see a way to get it work. In this version I've included patch to fix comment in return_from_SYSCALL_64, fixed bug in coverting startup_64 to C and updated the patch which allows to opt-in full address space. Kirill A. Shutemov (9): x86/asm: Fix comment in return_from_SYSCALL_64 x86/boot/64: Rewrite startup_64 in C x86/boot/64: Rename init_level4_pgt and early_level4_pgt x86/boot/64: Add support of additional page table level during early boot x86/mm: Add sync_global_pgds() for configuration with 5-level paging x86/mm: Make kernel_physical_mapping_init() support 5-level paging x86/mm: Add support for 5-level paging for KASLR x86: Enable 5-level paging support x86/mm: Allow to have userspace mappings above 47-bits arch/x86/Kconfig | 5 + arch/x86/boot/compressed/head_64.S | 23 ++++- arch/x86/entry/entry_64.S | 3 +- arch/x86/include/asm/elf.h | 4 +- arch/x86/include/asm/mpx.h | 9 ++ arch/x86/include/asm/pgtable.h | 2 +- arch/x86/include/asm/pgtable_64.h | 6 +- arch/x86/include/asm/processor.h | 11 ++- arch/x86/include/uapi/asm/processor-flags.h | 2 + arch/x86/kernel/espfix_64.c | 2 +- arch/x86/kernel/head64.c | 137 +++++++++++++++++++++++++--- arch/x86/kernel/head_64.S | 134 +++++++-------------------- arch/x86/kernel/machine_kexec_64.c | 2 +- arch/x86/kernel/sys_x86_64.c | 30 +++++- arch/x86/mm/dump_pagetables.c | 2 +- arch/x86/mm/hugetlbpage.c | 27 +++++- arch/x86/mm/init_64.c | 104 +++++++++++++++++++-- arch/x86/mm/kasan_init_64.c | 12 +-- arch/x86/mm/kaslr.c | 81 ++++++++++++---- arch/x86/mm/mmap.c | 6 +- arch/x86/mm/mpx.c | 33 ++++++- arch/x86/realmode/init.c | 2 +- arch/x86/xen/Kconfig | 1 + arch/x86/xen/mmu.c | 18 ++-- arch/x86/xen/xen-pvh.S | 2 +- 25 files changed, 470 insertions(+), 188 deletions(-) -- 2.11.0