linux-kernel - [PATCH v3 0/5] Make IA32_EMULATION boot time overridable

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Message-Id: <20230616125730.1164989-1-nik.borisov@suse.com>
Date:   Fri, 16 Jun 2023 15:57:25 +0300
From:   Nikolay Borisov <nik.borisov@...e.com>
To:     x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, mhocko@...e.com, jslaby@...e.cz,
        Nikolay Borisov <nik.borisov@...e.com>
Subject: [PATCH v3 0/5] Make IA32_EMULATION boot time overridable

[Sending you to to gather a round of internals reviews before sending upstream]

Here's v3 of the patchset making IA32_EMULATION a boot time overridable switch.

Changes since v2:

* Re-worded the commit message of the first patch (tglx)
* Added help description for the newly introduces IA32_EMULATION_DEFAULT_DISABLED (rdunlap)
* Change the order of the last 2 patches (brgerst)
* Reworked the way ia32_enabled state is being checked - introduced a function
and eliminated code duplication (tglx)
* Reworked the way the idt table is being initialized (tglx)
* Split the rename and unconditional compile of of ignore_sysret (tglx)

Nikolay Borisov (5):
  x86: Make IA32_EMULATION boot time configurable
  x86/entry: Rename ignore_sysret
  x86/entry: Compile entry_SYSCALL32_ignore unconditionally
  x86/elf: Predicate loading of 32bit processes on ia32_enabled()
  x86/entry: Make IA32 syscalls availability depend on ia32_enabled()

 .../admin-guide/kernel-parameters.txt         |  5 +++
 arch/x86/Kconfig                              |  9 +++++
 arch/x86/entry/common.c                       | 16 ++++++++
 arch/x86/entry/entry_64.S                     |  6 +--
 arch/x86/include/asm/elf.h                    |  3 +-
 arch/x86/include/asm/ia32.h                   | 17 ++++++++-
 arch/x86/include/asm/processor.h              |  2 +-
 arch/x86/include/asm/proto.h                  |  3 ++
 arch/x86/kernel/cpu/common.c                  | 37 ++++++++++---------
 arch/x86/kernel/idt.c                         | 10 +++++
 10 files changed, 82 insertions(+), 26 deletions(-)

--
2.34.1