[PATCH v2 0/3] x86/pti: Get rid of entry trampolines and add some docs

[Andy Lutomirski <luto@kernel.org>]

This gets rid of entry trampolines.  It's more or less the same as
the RFC version, except that I rebased it to v4.19-rc1 due to
massive conflicts with some perf changes.  I have *not* reverted all
of the perf support for entry trampolines -- I leave that to the
perf crew, if needed.

Changes from v1: Get rid of the rsp_scratch macro

Andy Lutomirski (3):
  x86/entry/64: Document idtentry
  x86/entry/64: Use the TSS sp2 slot for SYSCALL/SYSRET scratch space
  x86/pti/64: Remove the SYSCALL64 entry trampoline

 arch/x86/entry/entry_64.S             | 116 ++++++++++----------------
 arch/x86/include/asm/cpu_entry_area.h |   2 -
 arch/x86/include/asm/processor.h      |   6 ++
 arch/x86/include/asm/sections.h       |   1 -
 arch/x86/kernel/asm-offsets.c         |   5 +-
 arch/x86/kernel/cpu/common.c          |  11 +--
 arch/x86/kernel/kprobes/core.c        |  10 +--
 arch/x86/kernel/process_64.c          |   2 -
 arch/x86/kernel/traps.c               |   4 +
 arch/x86/kernel/vmlinux.lds.S         |  10 ---
 arch/x86/mm/cpu_entry_area.c          |  36 --------
 arch/x86/mm/pti.c                     |  33 +++++++-
 arch/x86/xen/xen-asm_64.S             |   8 +-
 13 files changed, 95 insertions(+), 149 deletions(-)

-- 
2.17.1