[PATCH 0/9] Control Flow Enforcement - Part (2)

[Yu-cheng Yu]

Summary of changes:

  Shadow stack kernel config option;
  Control protection exception; and
  Shadow stack memory management.

The shadow stack PTE needs to be read-only and dirty.  Changes
are made to:

  Use the read-only and hardware dirty combination exclusively
  for shadow stack;

  Use a PTE spare bit to indicate other PTE dirty conditions;

  Shadow stack page fault handling.

Yu-cheng Yu (9):
  x86/cet: Control protection exception handler
  x86/cet: Add Kconfig option for user-mode shadow stack
  mm: Introduce VM_SHSTK for shadow stack memory
  x86/mm: Change _PAGE_DIRTY to _PAGE_DIRTY_HW
  x86/mm: Introduce _PAGE_DIRTY_SW
  x86/mm: Introduce ptep_set_wrprotect_flush and related functions
  x86/mm: Shadow stack page fault error checking
  x86/cet: Handle shadow stack page fault
  x86/cet: Handle THP/HugeTLB shadow stack page copying

 arch/x86/Kconfig                     |  24 ++++++
 arch/x86/entry/entry_32.S            |   5 ++
 arch/x86/entry/entry_64.S            |   2 +-
 arch/x86/include/asm/pgtable.h       | 149 ++++++++++++++++++++++++++++++-----
 arch/x86/include/asm/pgtable_types.h |  31 +++++---
 arch/x86/include/asm/traps.h         |   5 ++
 arch/x86/kernel/idt.c                |   1 +
 arch/x86/kernel/relocate_kernel_64.S |   2 +-
 arch/x86/kernel/traps.c              |  61 ++++++++++++++
 arch/x86/kvm/vmx.c                   |   2 +-
 arch/x86/mm/fault.c                  |  11 +++
 include/asm-generic/pgtable.h        |  38 +++++++++
 include/linux/mm.h                   |   8 ++
 mm/huge_memory.c                     |  10 ++-
 mm/hugetlb.c                         |   2 +-
 mm/internal.h                        |   8 ++
 mm/memory.c                          |  32 +++++++-
 17 files changed, 353 insertions(+), 38 deletions(-)

-- 
2.15.1