linux-kernel - Re: [PATCH v7 0/7] x86/cpu, kvm: Support AMD Automatic IBRS

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Message-ID: <Y8aMiH74WFmVM5Rk@zn.tnic>
Date:   Tue, 17 Jan 2023 12:54:48 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>
Cc:     kvm@...r.kernel.org, Kim Phillips <kim.phillips@....com>,
        x86@...nel.org, 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>,
        Sean Christopherson <seanjc@...gle.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>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 0/7] x86/cpu, kvm: Support AMD Automatic IBRS

On Mon, Jan 16, 2023 at 05:01:52PM -0600, Kim Phillips wrote:

> Kim Phillips (7):
>   x86/cpu, kvm: Add support for cpuid leaf 80000021/EAX (FeatureExt2Eax)
>   x86/cpu, kvm: Add the NO_NESTED_DATA_BP feature
>   x86/cpu, kvm: Move the LFENCE_RDTSC / LFENCE always serializing
>     feature
>   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
>   x86/cpu, kvm: 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                  | 22 +++++++++-----
>  arch/x86/kvm/cpuid.c                          | 30 +++++++------------
>  arch/x86/kvm/reverse_cpuid.h                  |  1 +
>  arch/x86/kvm/svm/svm.c                        |  3 ++
>  arch/x86/kvm/x86.c                            |  3 ++
>  14 files changed, 71 insertions(+), 48 deletions(-)

KVM folks,

I'm going to route this through the tip tree, along with the KVM bits.

Holler if we should do something else to avoid any potential conflicts.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette