[PATCH PTI v3 00/10] Clean up pgd handling and fix VSYSCALL and LDT

[Andy Lutomirski <luto@kernel.org>]

This should fix some existing 5-level bugs and get VSYSCALL and LDT
working with PTI.

Changes from v1:
 - vsyscalls actually work.
 - Added the "Warn and fail" patch to prevent the testing goof I had on v1.
 - Lots of cleanups
 
Andy Lutomirski (10):
  x86/espfix/64: Fix espfix double-fault handling on 5-level systems
  x86/pti: Vastly simplify pgd synchronization
  x86/pti/64: Fix ESPFIX64 user mapping
  Revert "x86/mm/pti: Disable native VSYSCALL"
  x86/vsyscall/64: Explicitly set _PAGE_USER in the pagetable hierarchy
  x86/vsyscall/64: Warn and fail vsyscall emulation in NATIVE mode
  x86/pti: Map the vsyscall page if needed
  x86/mm/64: Improve the memory map documentation
  x86/mm/64: Make a full PGD-entry size hole in the memory map
  x86/pti: Put the LDT in its own PGD if PTI is on

 Documentation/x86/x86_64/mm.txt         |  15 +--
 arch/x86/Kconfig                        |   8 --
 arch/x86/entry/vsyscall/vsyscall_64.c   |  37 +++++++-
 arch/x86/include/asm/mmu_context.h      |  48 +++++++++-
 arch/x86/include/asm/pgtable.h          |   6 +-
 arch/x86/include/asm/pgtable_64.h       |  77 +++++++---------
 arch/x86/include/asm/pgtable_64_types.h |   8 +-
 arch/x86/include/asm/processor.h        |  23 +++--
 arch/x86/include/asm/vsyscall.h         |   1 +
 arch/x86/kernel/espfix_64.c             |  16 ----
 arch/x86/kernel/ldt.c                   | 155 +++++++++++++++++++++++++++++--
 arch/x86/kernel/traps.c                 |   2 +-
 arch/x86/mm/dump_pagetables.c           |  12 +++
 arch/x86/mm/pti.c                       | 157 ++++++++++++++++++++++----------
 init/main.c                             |  11 ++-
 15 files changed, 426 insertions(+), 150 deletions(-)

-- 
2.13.6