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Yu-cheng Yu 315a4af8cd x86/insn: Add Control-flow Enforcement (CET) instructions to the opcode map 
Add the following CET instructions to the opcode map:

  INCSSP:
      Increment Shadow Stack pointer (SSP).

  RDSSP:
      Read SSP into a GPR.

  SAVEPREVSSP:
      Use "previous ssp" token at top of current Shadow Stack (SHSTK) to
      create a "restore token" on the previous (outgoing) SHSTK.

  RSTORSSP:
      Restore from a "restore token" to SSP.

  WRSS:
      Write to kernel-mode SHSTK (kernel-mode instruction).

  WRUSS:
      Write to user-mode SHSTK (kernel-mode instruction).

  SETSSBSY:
      Verify the "supervisor token" pointed by MSR_IA32_PL0_SSP, set the
      token busy, and set then Shadow Stack pointer(SSP) to the value of
      MSR_IA32_PL0_SSP.

  CLRSSBSY:
      Verify the "supervisor token" and clear its busy bit.

  ENDBR64/ENDBR32:
      Mark a valid 64/32 bit control transfer endpoint.

Detailed information of CET instructions can be found in Intel Software
Developer's Manual.

Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi v. Shankar <ravi.v.shankar@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: http://lore.kernel.org/lkml/20200204171425.28073-2-yu-cheng.yu@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-03-27 10:38:46 -03:00
..
alpha/include tools headers uapi: Sync asm-generic/mman-common.h and linux/mman.h 2019-03-28 14:31:56 -03:00
arc/include/uapi/asm tools arch uapi: Copy missing unistd.h headers for arc, hexagon and riscv 2019-05-02 16:00:20 -04:00
arm/include tools headers kvm: Sync kvm headers with the kernel sources 2019-12-02 12:54:13 -03:00
arm64/include tools headers kvm: Sync kvm headers with the kernel sources 2020-02-12 12:41:20 -03:00
csky/include/uapi/asm csky: Add support for libdw 2019-05-15 16:36:46 -03:00
h8300/include License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
hexagon/include/uapi/asm tools arch uapi: Copy missing unistd.h headers for arc, hexagon and riscv 2019-05-02 16:00:20 -04:00
ia64/include tools, perf: add and use optimized ring_buffer_{read_head, write_tail} helpers 2018-10-19 13:43:08 -07:00
microblaze/include/uapi/asm License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
mips/include tools headers uapi: Sync asm-generic/mman-common.h and linux/mman.h 2019-03-28 14:31:56 -03:00
parisc/include/uapi/asm tools headers uapi: Sync asm-generic/mman-common.h and linux/mman.h 2019-03-28 14:31:56 -03:00
powerpc/include tools headers kvm: Sync kvm headers with the kernel sources 2019-12-02 12:54:13 -03:00
riscv/include/uapi/asm riscv: Add support for libdw 2019-09-05 00:51:52 -07:00
s390/include tools headers kvm: Sync kvm headers with the kernel sources 2019-09-30 17:29:30 -03:00
sh/include License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
sparc/include tools headers UAPI: Update tools's copy of mman.h headers 2019-07-29 09:02:58 -03:00
x86 x86/insn: Add Control-flow Enforcement (CET) instructions to the opcode map 2020-03-27 10:38:46 -03:00
xtensa/include tools headers uapi: Sync asm-generic/mman-common.h and linux/mman.h 2019-03-28 14:31:56 -03:00