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    Subject[RFC PATCH v4 00/27] Control Flow Enforcement: Shadow Stack
    Date
    The previous version of CET patches can be found in the following
    link:

    https://lkml.org/lkml/2018/8/30/608

    Summary of changes from v3:

    Fixed an issue in page fault handling in do_swap_page().
    Fixed issues in ptep_set_wrprotect/pmdp_set_wrprotect.
    Changed WRUSS fault handling to asm_goto.
    Added shadow stack to memory accounting.
    Added a patch to create a guard gap between VMAs.
    Added a patch to prevent merging of shadow stack areas.
    Other small fixes in ELF header parsing and typos.

    Yu-cheng Yu (27):
    x86/cpufeatures: Add CPUIDs for Control-flow Enforcement Technology
    (CET)
    x86/fpu/xstate: Change some names to separate XSAVES system and user
    states
    x86/fpu/xstate: Enable XSAVES system states
    x86/fpu/xstate: Add XSAVES system states for shadow stack
    Documentation/x86: Add CET description
    x86/cet: Control protection exception handler
    x86/cet/shstk: 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
    drm/i915/gvt: Update _PAGE_DIRTY to _PAGE_DIRTY_BITS
    x86/mm: Introduce _PAGE_DIRTY_SW
    x86/mm: Modify ptep_set_wrprotect and pmdp_set_wrprotect for
    _PAGE_DIRTY_SW
    x86/mm: Shadow stack page fault error checking
    mm: Handle shadow stack page fault
    mm: Handle THP/HugeTLB shadow stack page fault
    mm: Update can_follow_write_pte/pmd for shadow stack
    mm: Introduce do_mmap_locked()
    x86/cet/shstk: User-mode shadow stack support
    x86/cet/shstk: Introduce WRUSS instruction
    x86/cet/shstk: Signal handling for shadow stack
    x86/cet/shstk: ELF header parsing of Shadow Stack
    x86/cet/shstk: Handle thread shadow stack
    mm/map: Add Shadow stack pages to memory accounting
    mm/mmap: Create a guard area between VMAs
    mm/mmap: Prevent Shadow Stack VMA merges
    x86/cet/shstk: Add arch_prctl functions for Shadow Stack
    x86/cet/shstk: Add Shadow Stack instructions to opcode map

    .../admin-guide/kernel-parameters.txt | 6 +
    Documentation/index.rst | 1 +
    Documentation/x86/index.rst | 11 +
    Documentation/x86/intel_cet.rst | 259 +++++++++++++
    arch/x86/Kconfig | 28 ++
    arch/x86/Makefile | 7 +
    arch/x86/entry/entry_64.S | 2 +-
    arch/x86/ia32/ia32_signal.c | 13 +
    arch/x86/include/asm/cet.h | 42 +++
    arch/x86/include/asm/cpufeatures.h | 2 +
    arch/x86/include/asm/disabled-features.h | 8 +-
    arch/x86/include/asm/elf.h | 5 +
    arch/x86/include/asm/fpu/internal.h | 6 +-
    arch/x86/include/asm/fpu/types.h | 22 ++
    arch/x86/include/asm/fpu/xstate.h | 31 +-
    arch/x86/include/asm/mmu_context.h | 3 +
    arch/x86/include/asm/msr-index.h | 14 +
    arch/x86/include/asm/pgtable.h | 191 ++++++++--
    arch/x86/include/asm/pgtable_types.h | 31 +-
    arch/x86/include/asm/processor.h | 5 +
    arch/x86/include/asm/sighandling.h | 5 +
    arch/x86/include/asm/special_insns.h | 32 ++
    arch/x86/include/asm/traps.h | 5 +
    arch/x86/include/uapi/asm/elf_property.h | 15 +
    arch/x86/include/uapi/asm/prctl.h | 5 +
    arch/x86/include/uapi/asm/processor-flags.h | 2 +
    arch/x86/include/uapi/asm/sigcontext.h | 17 +
    arch/x86/kernel/Makefile | 4 +
    arch/x86/kernel/cet.c | 285 +++++++++++++++
    arch/x86/kernel/cet_prctl.c | 79 ++++
    arch/x86/kernel/cpu/common.c | 24 ++
    arch/x86/kernel/cpu/scattered.c | 1 +
    arch/x86/kernel/elf.c | 340 ++++++++++++++++++
    arch/x86/kernel/fpu/core.c | 11 +-
    arch/x86/kernel/fpu/init.c | 10 -
    arch/x86/kernel/fpu/signal.c | 6 +-
    arch/x86/kernel/fpu/xstate.c | 152 +++++---
    arch/x86/kernel/idt.c | 4 +
    arch/x86/kernel/process.c | 8 +
    arch/x86/kernel/process_64.c | 7 +
    arch/x86/kernel/relocate_kernel_64.S | 2 +-
    arch/x86/kernel/signal.c | 96 +++++
    arch/x86/kernel/traps.c | 58 +++
    arch/x86/kvm/vmx.c | 2 +-
    arch/x86/lib/x86-opcode-map.txt | 26 +-
    arch/x86/mm/fault.c | 27 ++
    arch/x86/mm/pgtable.c | 42 +++
    drivers/gpu/drm/i915/gvt/gtt.c | 2 +-
    fs/binfmt_elf.c | 15 +
    fs/proc/task_mmu.c | 3 +
    include/asm-generic/pgtable.h | 14 +
    include/linux/mm.h | 56 ++-
    include/uapi/linux/elf.h | 1 +
    mm/gup.c | 8 +-
    mm/huge_memory.c | 12 +-
    mm/memory.c | 7 +-
    mm/mmap.c | 11 +
    tools/objtool/arch/x86/lib/x86-opcode-map.txt | 26 +-
    58 files changed, 1946 insertions(+), 161 deletions(-)
    create mode 100644 Documentation/x86/index.rst
    create mode 100644 Documentation/x86/intel_cet.rst
    create mode 100644 arch/x86/include/asm/cet.h
    create mode 100644 arch/x86/include/uapi/asm/elf_property.h
    create mode 100644 arch/x86/kernel/cet.c
    create mode 100644 arch/x86/kernel/cet_prctl.c
    create mode 100644 arch/x86/kernel/elf.c

    --
    2.17.1

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