The previous version of CET Shadow Stack patches is at the following link: https://lkml.org/lkml/2018/10/11/642 Summary of changes from v5: To support more threads, change compat-mode thread shadow stack to a fixed size from RLIMIT_STACK to RLIMIT_STACK / 4. This change applies only to 32-bit pthreads. Some clean-up and small fixes in response to comments. Thanks to all reviewers. Yu-cheng Yu (26): Documentation/x86: Add CET description x86/cpufeatures: Add CET CPU feature flags for Control-flow Enforcement Technology (CET) x86/fpu/xstate: Change names to separate XSAVES system and user states x86/fpu/xstate: Introduce XSAVES system states x86/fpu/xstate: Add XSAVES system states for shadow stack x86/cet: Add control protection exception handler x86/cet/shstk: Add Kconfig option for user-mode shadow stack mm: Introduce VM_SHSTK for shadow stack memory mm/mmap: Prevent Shadow Stack VMA merges x86/mm: Change _PAGE_DIRTY to _PAGE_DIRTY_HW x86/mm: Introduce _PAGE_DIRTY_SW drm/i915/gvt: Update _PAGE_DIRTY to _PAGE_DIRTY_BITS 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/mmap: Add Shadow stack pages to memory accounting 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 | 13 + Documentation/x86/intel_cet.rst | 268 +++++++++++++ arch/x86/Kconfig | 29 ++ arch/x86/Makefile | 7 + arch/x86/entry/entry_64.S | 2 +- arch/x86/ia32/ia32_signal.c | 21 + arch/x86/include/asm/cet.h | 46 +++ 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 | 5 +- arch/x86/include/asm/fpu/types.h | 22 ++ arch/x86/include/asm/fpu/xstate.h | 26 +- arch/x86/include/asm/mmu_context.h | 3 + arch/x86/include/asm/msr-index.h | 15 + arch/x86/include/asm/pgtable.h | 191 ++++++++-- arch/x86/include/asm/pgtable_types.h | 38 +- 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 | 15 + arch/x86/kernel/Makefile | 4 + arch/x86/kernel/cet.c | 304 +++++++++++++++ arch/x86/kernel/cet_prctl.c | 86 +++++ arch/x86/kernel/cpu/common.c | 25 ++ arch/x86/kernel/elf.c | 358 ++++++++++++++++++ arch/x86/kernel/fpu/core.c | 10 +- arch/x86/kernel/fpu/init.c | 10 - arch/x86/kernel/fpu/signal.c | 6 +- arch/x86/kernel/fpu/xstate.c | 158 +++++--- arch/x86/kernel/idt.c | 4 + arch/x86/kernel/process.c | 7 +- arch/x86/kernel/process_64.c | 7 + arch/x86/kernel/relocate_kernel_64.S | 2 +- arch/x86/kernel/signal.c | 97 +++++ arch/x86/kernel/signal_compat.c | 2 +- arch/x86/kernel/traps.c | 57 +++ 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 | 41 ++ 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 | 26 ++ include/uapi/asm-generic/siginfo.h | 3 +- include/uapi/linux/elf.h | 1 + mm/gup.c | 8 +- mm/huge_memory.c | 12 +- mm/memory.c | 7 +- mm/mmap.c | 11 + .../arch/x86/include/asm/disabled-features.h | 8 +- tools/objtool/arch/x86/lib/x86-opcode-map.txt | 26 +- 60 files changed, 2004 insertions(+), 157 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
