linux-kernel - [PATCH v3 00/20] SRSO fixes/cleanups

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Message-ID: <cover.1693889988.git.jpoimboe@kernel.org>
Date:   Mon,  4 Sep 2023 22:04:44 -0700
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Babu Moger <babu.moger@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>, David.Kaplan@....com,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Nikolay Borisov <nik.borisov@...e.com>,
        gregkh@...uxfoundation.org, Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v3 00/20] SRSO fixes/cleanups

v3:
- drop kvm patches (to be picked up by Sean)
- fix "no microcode, no microcode" printk
- fix "Safe Ret" capitalization in documentation
- fix chopped line in commit log
- drop "x86/srso: Remove redundant X86_FEATURE_ENTRY_IBPB check" patch

Josh Poimboeuf (20):
  x86/srso: Fix srso_show_state() side effect
  x86/srso: Set CPUID feature bits independently of bug or mitigation
    status
  x86/srso: Don't probe microcode in a guest
  x86/srso: Fix SBPB enablement for spec_rstack_overflow=off
  x86/srso: Fix SBPB enablement for (possible) future fixed HW
  x86/srso: Print actual mitigation if requested mitigation isn't
    possible
  x86/srso: Print mitigation for retbleed IBPB case
  x86/srso: Fix vulnerability reporting for missing microcode
  x86/srso: Fix unret validation dependencies
  x86/alternatives: Remove faulty optimization
  x86/srso: Improve i-cache locality for alias mitigation
  x86/srso: Unexport untraining functions
  x86/srso: Remove 'pred_cmd' label
  x86/bugs: Remove default case for fully switched enums
  x86/srso: Move retbleed IBPB check into existing 'has_microcode' code
    block
  x86/srso: Disentangle rethunk-dependent options
  x86/rethunk: Use SYM_CODE_START[_LOCAL]_NOALIGN macros
  x86/retpoline: Remove .text..__x86.return_thunk section
  x86/nospec: Refactor UNTRAIN_RET[_*]
  x86/calldepth: Rename __x86_return_skl() to call_depth_return_thunk()

 Documentation/admin-guide/hw-vuln/srso.rst |  24 ++-
 arch/x86/include/asm/nospec-branch.h       |  69 ++++-----
 arch/x86/include/asm/processor.h           |   2 -
 arch/x86/kernel/alternative.c              |   8 -
 arch/x86/kernel/cpu/amd.c                  |  28 ++--
 arch/x86/kernel/cpu/bugs.c                 | 102 ++++++------
 arch/x86/kernel/vmlinux.lds.S              |  10 +-
 arch/x86/lib/retpoline.S                   | 171 +++++++++++----------
 include/linux/objtool.h                    |   3 +-
 scripts/Makefile.vmlinux_o                 |   3 +-
 10 files changed, 201 insertions(+), 219 deletions(-)

-- 
2.41.0