The first version of CET patches were divided into four series. They can be found in the following links. https://lkml.org/lkml/2018/6/7/795 https://lkml.org/lkml/2018/6/7/782 https://lkml.org/lkml/2018/6/7/771 https://lkml.org/lkml/2018/6/7/739 Summary of changes in v2: Small fixes in the XSAVES patches. Improve: Documentation/x86/intel_cet.txt. Remove TLB flushing from ptep/pmdp_set_wrprotect for SHSTK. Use shadow stack restore token for signals; save SHSTK pointer after FPU. Rewrite ELF header parsing. Backward compatibility is now handled from GLIBC tunables. Add a new patch to can_follow_write_pte/pmd, for SHSTK. Remove blocking of mremap/madvice/munmap. Add Makefile checking CET support of assembler/compiler. H.J. Lu (1): x86: Insert endbr32/endbr64 to vDSO Yu-cheng Yu (26): 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 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/mprotect: Prevent mprotect from changing shadow stack mm: Modify can_follow_write_pte/pmd for shadow stack 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 CET x86/cet/ibt: Add Kconfig option for user-mode Indirect Branch Tracking x86/cet/ibt: User-mode indirect branch tracking support mm/mmap: Add IBT bitmap size to address space limit check x86/cet: Add PTRACE interface for CET x86/cet/shstk: Handle thread shadow stack x86/cet: Add arch_prctl functions for CET .../admin-guide/kernel-parameters.txt | 6 + Documentation/x86/intel_cet.txt | 250 ++++++++++++ arch/x86/Kconfig | 40 ++ arch/x86/Makefile | 14 + arch/x86/entry/entry_64.S | 2 +- arch/x86/entry/vdso/.gitignore | 4 + arch/x86/entry/vdso/Makefile | 12 +- arch/x86/entry/vdso/vdso-layout.lds.S | 1 + arch/x86/ia32/ia32_signal.c | 13 + arch/x86/include/asm/cet.h | 50 +++ arch/x86/include/asm/cpufeatures.h | 2 + arch/x86/include/asm/disabled-features.h | 16 +- arch/x86/include/asm/elf.h | 5 + arch/x86/include/asm/fpu/internal.h | 6 +- arch/x86/include/asm/fpu/regset.h | 7 +- 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 | 135 ++++++- 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 | 45 +++ arch/x86/include/asm/traps.h | 5 + arch/x86/include/uapi/asm/elf_property.h | 16 + arch/x86/include/uapi/asm/prctl.h | 6 + arch/x86/include/uapi/asm/processor-flags.h | 2 + arch/x86/include/uapi/asm/resource.h | 5 + arch/x86/include/uapi/asm/sigcontext.h | 17 + arch/x86/kernel/Makefile | 4 + arch/x86/kernel/cet.c | 375 ++++++++++++++++++ arch/x86/kernel/cet_prctl.c | 141 +++++++ arch/x86/kernel/cpu/common.c | 42 ++ arch/x86/kernel/cpu/scattered.c | 1 + arch/x86/kernel/elf.c | 280 +++++++++++++ arch/x86/kernel/fpu/core.c | 11 +- arch/x86/kernel/fpu/init.c | 10 - arch/x86/kernel/fpu/regset.c | 41 ++ 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 | 10 + arch/x86/kernel/process_64.c | 7 + arch/x86/kernel/ptrace.c | 16 + 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 | 2 +- arch/x86/mm/fault.c | 24 +- fs/binfmt_elf.c | 16 + fs/proc/task_mmu.c | 3 + include/asm-generic/pgtable.h | 21 + include/linux/mm.h | 8 + include/uapi/asm-generic/resource.h | 3 + include/uapi/linux/elf.h | 2 + mm/gup.c | 11 +- mm/huge_memory.c | 18 +- mm/internal.h | 8 + mm/memory.c | 38 +- mm/mmap.c | 12 +- mm/mprotect.c | 9 + tools/objtool/arch/x86/lib/x86-opcode-map.txt | 2 +- 64 files changed, 2070 insertions(+), 135 deletions(-) create mode 100644 Documentation/x86/intel_cet.txt 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
