linux-kernel - [PATCH v2 0/2] Clean up x86

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Date:   Sat, 13 Feb 2021 11:19:43 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     x86@...nel.org
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Brian Gerst <brgerst@...il.com>,
        Joerg Roedel <jroedel@...e.de>,
        Andy Lutomirski <luto@...nel.org>
Subject: [PATCH v2 0/2] Clean up x86_32 stackprotector

x86_32 stackprotector is a maintenance nightmare.  Clean it up.  This
disables stackprotector on x86_32 on GCC 8.1 and on all clang
versions.  Some clang people are cc'd.

Changes from v1:
 - Changelog fixes.
 - Comment fixes (mostly from Sean).
 - Fix the !SMP case.

Andy Lutomirski (2):
  x86/stackprotector/32: Make the canary into a regular percpu variable
  x86/entry/32: Remove leftover macros after stackprotector cleanups

 arch/x86/Kconfig                          |  7 +-
 arch/x86/Makefile                         |  8 ++
 arch/x86/entry/entry_32.S                 | 95 +----------------------
 arch/x86/include/asm/processor.h          | 15 +---
 arch/x86/include/asm/ptrace.h             |  5 +-
 arch/x86/include/asm/segment.h            | 30 ++-----
 arch/x86/include/asm/stackprotector.h     | 79 ++++---------------
 arch/x86/include/asm/suspend_32.h         |  6 +-
 arch/x86/kernel/asm-offsets_32.c          |  5 --
 arch/x86/kernel/cpu/common.c              |  5 +-
 arch/x86/kernel/doublefault_32.c          |  4 +-
 arch/x86/kernel/head_32.S                 | 18 +----
 arch/x86/kernel/setup_percpu.c            |  1 -
 arch/x86/kernel/tls.c                     |  8 +-
 arch/x86/kvm/svm/svm.c                    | 10 +--
 arch/x86/lib/insn-eval.c                  |  4 -
 arch/x86/platform/pvh/head.S              | 14 ----
 arch/x86/power/cpu.c                      |  6 +-
 arch/x86/xen/enlighten_pv.c               |  1 -
 scripts/gcc-x86_32-has-stack-protector.sh |  6 +-
 20 files changed, 62 insertions(+), 265 deletions(-)

-- 
2.29.2