linux-kernel - [GIT PULL] x86/entry changes for v6.7

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Date:   Sat, 28 Oct 2023 15:37:46 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Uros Bizjak <ubizjak@...il.com>,
        Brian Gerst <brgerst@...il.com>,
        Andy Lutomirski <luto@...nel.org>
Subject: [GIT PULL] x86/entry changes for v6.7

Linus,

Please pull the latest x86/entry git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-entry-2023-10-28

   # HEAD: 1a09a27153f91cd7676b2d4ca574577572a8c999 x86/entry/32: Clean up syscall fast exit tests

Changes to the x86 entry code in v6.7:

 - Make IA32_EMULATION boot time configurable with
   the new ia32_emulation=<bool> boot option.

 - Clean up fast syscall return validation code: convert
   it to C and refactor the code.

 - As part of this, optimize the canonical RIP test code.

 Thanks,

	Ingo

------------------>
Brian Gerst (7):
      x86/entry/64: Remove obsolete comment on tracing vs. SYSRET
      x86/entry/compat: Combine return value test from syscall handler
      x86/entry/32: Convert do_fast_syscall_32() to bool return type
      x86/entry/32: Remove SEP test for SYSEXIT
      x86/entry/64: Convert SYSRET validation tests to C
      x86/entry/64: Use TASK_SIZE_MAX for canonical RIP test
      x86/entry/32: Clean up syscall fast exit tests

Nikolay Borisov (6):
      x86: Introduce ia32_enabled()
      x86/entry: Rename ignore_sysret()
      x86/entry: Compile entry_SYSCALL32_ignore() unconditionally
      x86/elf: Make loading of 32bit processes depend on ia32_enabled()
      x86/entry: Make IA32 syscalls' availability depend on ia32_enabled()
      x86: Make IA32_EMULATION boot time configurable


 Documentation/admin-guide/kernel-parameters.txt |   6 ++
 arch/x86/Kconfig                                |   9 ++
 arch/x86/entry/common.c                         | 113 +++++++++++++++++-------
 arch/x86/entry/entry_32.S                       |   2 +-
 arch/x86/entry/entry_64.S                       |  72 +--------------
 arch/x86/entry/entry_64_compat.S                |  11 ++-
 arch/x86/include/asm/elf.h                      |   3 +-
 arch/x86/include/asm/ia32.h                     |  16 +++-
 arch/x86/include/asm/processor.h                |   2 +-
 arch/x86/include/asm/proto.h                    |   3 +
 arch/x86/include/asm/syscall.h                  |   6 +-
 arch/x86/kernel/cpu/common.c                    |  37 ++++----
 arch/x86/kernel/idt.c                           |   7 ++
 13 files changed, 155 insertions(+), 132 deletions(-)