[RFC PATCH v2 00/27] Control Flow Enforcement (CET)

From: Yu-cheng Yu
Date: Tue Jul 10 2018 - 18:31:13 EST

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

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2.17.1