linux-kernel - Re: [PATCH v9 0/8] x86/cpu, kvm: Support AMD Automatic IBRS

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Message-ID: <Y9BPnTJSI247DV50@google.com>
Date:   Tue, 24 Jan 2023 21:37:33 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Kim Phillips <kim.phillips@....com>
Cc:     x86@...nel.org, Borislav Petkov <bp@...en8.de>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Joao Martins <joao.m.martins@...cle.com>,
        Jonathan Corbet <corbet@....net>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Juergen Gross <jgross@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tony Luck <tony.luck@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Alexey Kardashevskiy <aik@....com>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 0/8] x86/cpu, kvm: Support AMD Automatic IBRS

On Tue, Jan 24, 2023, Kim Phillips wrote:
> Kim Phillips (8):
>   x86/cpu, kvm: Add support for CPUID_80000021_EAX
>   KVM: x86: Move open-coded cpuid leaf 0x80000021 EAX bit propagation
>     code
>   x86/cpu, kvm: Add the NO_NESTED_DATA_BP feature
>   x86/cpu, kvm: Move X86_FEATURE_LFENCE_RDTSC to its native leaf
>   x86/cpu, kvm: Add the Null Selector Clears Base feature
>   x86/cpu, kvm: Add the SMM_CTL MSR not present feature
>   x86/cpu: Support AMD Automatic IBRS
>   KVM: x86: Propagate the AMD Automatic IBRS feature to the guest
> 
>  Documentation/admin-guide/hw-vuln/spectre.rst |  6 ++--
>  .../admin-guide/kernel-parameters.txt         |  6 ++--
>  arch/x86/include/asm/cpufeature.h             |  7 +++--
>  arch/x86/include/asm/cpufeatures.h            | 11 ++++++--
>  arch/x86/include/asm/disabled-features.h      |  3 +-
>  arch/x86/include/asm/msr-index.h              |  2 ++
>  arch/x86/include/asm/required-features.h      |  3 +-
>  arch/x86/kernel/cpu/amd.c                     |  2 +-
>  arch/x86/kernel/cpu/bugs.c                    | 20 +++++++------
>  arch/x86/kernel/cpu/common.c                  | 26 +++++++++--------
>  arch/x86/kvm/cpuid.c                          | 28 ++++++-------------
>  arch/x86/kvm/reverse_cpuid.h                  |  1 +
>  arch/x86/kvm/svm/svm.c                        |  3 ++
>  arch/x86/kvm/x86.c                            |  3 ++
>  14 files changed, 70 insertions(+), 51 deletions(-)
> 
> -- 

With my goof in the LFENCE_RDTSC patch fixed,

Acked-by: Sean Christopherson <seanjc@...gle.com>