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    SubjectRe: [tip:x86/pti] x86/spectre: Add boot time option to select Spectre v2 mitigation
    On Wed, 10 Jan 2018, Tom Lendacky wrote:
    > > +retpoline_auto:
    > > + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
    >
    > Not specifying anything on the command line will get SPECTRE_V2_CMD_AUTO,
    > so boot_cpu_has(X86_FEATURE_LFENCE_RDTSC) needs to be checked since it
    > won't have been checked previously.

    Dammit.

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