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

[Borislav Petkov]

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.

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