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

Andy Lutomirski
2018-09-03T22:59:48Z

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(-)

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2.17.1