[PATCHv3 0/4] x86: Make 5-level paging support unconditional for x86-64

[Kirill A. Shutemov]

Both Intel and AMD CPUs support 5-level paging, which is expected to
become more widely adopted in the future.

Remove CONFIG_X86_5LEVEL.

In preparation to that remove CONFIG_DYNAMIC_MEMORY_LAYOUT and make
SPARSEMEM_VMEMMAP the only memory model.

v3:
 - Drop few "#if CONFIG_PGTABLE_LEVELS >= 5";
 - Make PARAVIRT_XXL 64-bit explicitly and drop ifdefs
   to support PGTABLE_LEVELS < 5;
 - Add Reviewed-by tags from Ard;
v2:
 - Fix 32-bit build by wrapping p4d_set_huge() and p4d_clear_huge() in
   #if CONFIG_PGTABLE_LEVELS > 4;
 - Rebased onto current tip/master;

Kirill A. Shutemov (4):
  x86/64/mm: Always use dynamic memory layout
  x86/64/mm: Make SPARSEMEM_VMEMMAP the only memory model
  x86/64/mm: Make 5-level paging support unconditional
  x86/paravirt: Restrict PARAVIRT_XXL to 64-bit only

 Documentation/arch/x86/cpuinfo.rst            |  8 ++---
 .../arch/x86/x86_64/5level-paging.rst         |  9 -----
 arch/x86/Kconfig                              | 33 ++-----------------
 arch/x86/Kconfig.cpufeatures                  |  4 ---
 arch/x86/boot/compressed/pgtable_64.c         | 11 ++-----
 arch/x86/boot/header.S                        |  4 ---
 arch/x86/boot/startup/map_kernel.c            |  5 +--
 arch/x86/entry/vsyscall/vsyscall_64.c         |  2 --
 arch/x86/include/asm/page_64.h                |  2 --
 arch/x86/include/asm/page_64_types.h          | 11 -------
 arch/x86/include/asm/paravirt.h               |  4 ---
 arch/x86/include/asm/paravirt_types.h         |  2 --
 arch/x86/include/asm/pgtable_64.h             |  2 --
 arch/x86/include/asm/pgtable_64_types.h       | 24 --------------
 arch/x86/kernel/alternative.c                 |  2 +-
 arch/x86/kernel/head64.c                      |  4 ---
 arch/x86/kernel/head_64.S                     |  2 --
 arch/x86/kernel/paravirt.c                    |  2 --
 arch/x86/mm/init.c                            |  4 ---
 arch/x86/mm/init_64.c                         |  9 +----
 arch/x86/mm/pgtable.c                         |  2 +-
 arch/x86/xen/mmu_pv.c                         |  4 ---
 drivers/firmware/efi/libstub/x86-5lvl.c       |  2 +-
 scripts/gdb/linux/pgtable.py                  |  4 +--
 24 files changed, 14 insertions(+), 142 deletions(-)

-- 
2.47.2