Function has_x86_meltdown_bug 

pub fn has_x86_meltdown_bug(
    cpuid: &impl Cpuid,
    msr: &impl ReadReg<ArchCapabilitiesMsr>,
) -> bool

Whether the CPU is susceptible to the Rogue Data Cache Load (Meltdown) bug: https://software.intel.com/security-software-guidance/advisory-guidance/rogue-data-cache-load.

CVE-2017-5754.