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

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Message-Id: <cover.1535753890.git.luto@kernel.org>
Date:   Fri, 31 Aug 2018 15:21:46 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     x86@...nel.org
Cc:     Borislav Petkov <bp@...en8.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Joerg Roedel <joro@...tes.org>, Jiri Olsa <jolsa@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>
Subject: [PATCH 0/3] x86/pti: Get rid of entry trampolines and add some docs

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.

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

 arch/x86/entry/entry_64.S             | 101 +++++++++-----------------
 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/include/asm/thread_info.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 ++++++++-
 13 files changed, 83 insertions(+), 139 deletions(-)

-- 
2.17.1