Control-flow Enforcement (CET) is a new Intel processor feature that blocks
return/jump-oriented programming attacks.  Details are in "Intel 64 and
IA-32 Architectures Software Developer's Manual" [1].

This is the second part of CET and enables Indirect Branch Tracking (IBT).
It is built on top of the shadow stack series.

Changes in v23:
- Add patch #6: introduce a macro for ENDBR instructions.
- Patch #7: replace endbr32 with ENDBR macro.
- Patch #9: revise, add/replace endbr64 with ENDBR macro.
- Rebase to Linus tree v5.12-rc3.

[1] Intel 64 and IA-32 Architectures Software Developer's Manual:

    https://software.intel.com/en-us/download/intel-64-and-ia-32-
    architectures-sdm-combined-volumes-1-2a-2b-2c-2d-3a-3b-3c-3d-and-4

[2] Indirect Branch Tracking patches v22:

    https://lore.kernel.org/r/20210310220519.16811-1-yu-cheng.yu@intel.com/ (local)

H.J. Lu (3):
  x86/cet/ibt: Update arch_prctl functions for Indirect Branch Tracking
  x86/vdso/32: Add ENDBR to __kernel_vsyscall entry point
  x86/vdso: Insert endbr32/endbr64 to vDSO

Yu-cheng Yu (6):
  x86/cet/ibt: Update Kconfig for user-mode Indirect Branch Tracking
  x86/cet/ibt: User-mode Indirect Branch Tracking support
  x86/cet/ibt: Handle signals for Indirect Branch Tracking
  x86/cet/ibt: Update ELF header parsing for Indirect Branch Tracking
  x86/entry: Introduce ENDBR macro
  x86/vdso: Add ENDBR to __vdso_sgx_enter_enclave

 arch/x86/Kconfig                         |  1 +
 arch/x86/entry/calling.h                 | 18 ++++++++
 arch/x86/entry/vdso/Makefile             |  4 ++
 arch/x86/entry/vdso/vdso32/system_call.S |  2 +
 arch/x86/entry/vdso/vsgx.S               |  4 ++
 arch/x86/include/asm/cet.h               |  3 ++
 arch/x86/kernel/cet.c                    | 59 +++++++++++++++++++++++-
 arch/x86/kernel/cet_prctl.c              |  5 ++
 arch/x86/kernel/fpu/signal.c             |  8 ++--
 arch/x86/kernel/process_64.c             |  8 ++++
 10 files changed, 107 insertions(+), 5 deletions(-)

-- 
2.21.0