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

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Message-ID: <20230905063550.GAZPbMRuLizPxmRuHF@fat_crate.local>
Date:   Tue, 5 Sep 2023 08:35:50 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        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: Re: [PATCH v3 00/20] SRSO fixes/cleanups

On Mon, Sep 04, 2023 at 10:04:44PM -0700, Josh Poimboeuf wrote:
> 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(-)

They all look good to me, thanks!

Acked-by: Borislav Petkov (AMD) <bp@...en8.de>

-- 
Regards/Gruss,
    Boris.

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