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    SubjectRe: [PATCH 01/16] x86/intel: Initialize IA32_FEATURE_CONTROL MSR at boot
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    On 04/10/19 23:56, Sean Christopherson wrote:
    > Always lock IA32_FEATURE_CONTROL if it exists, even if the CPU doesn't
    > support VMX, so that other existing and future kernel code that queries
    > IA32_FEATURE_CONTROL can assume it's locked.

    Possibly stupid question: why bother locking it? It makes sense to lock
    the MSR bits to _off_ in the firmware, but if the BIOS hasn't locked it,
    why should the OS?

    It seems to me that locking introduces a lot of complication.

    Paolo

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