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    SubjectRe: [PATCH] KVM: VMX: remove LFENCE in vmx_spec_ctrl_restore_host()
    On Thu, Jun 01, 2023 at 01:50:48AM +0100, Andrew Cooper wrote:
    > On 01/06/2023 1:42 am, Josh Poimboeuf wrote:
    > > So each LFENCE has a distinct purpose. That said, there are no indirect
    > > branches or unbalanced RETs between them.
    >
    > How lucky are you feeling?
    >
    > You're in C at this point, which means the compiler could have emitted a
    > call to mem{cpy,cmp}() in place of a simple assignment/comparison.

    But it's only unbalanced RETs we're concerned about, per Intel.

    --
    Josh

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