MSR_BIOS_SIGN
rdmsr_safe(MSR_BIOS_SIGN, &rev0); /* Get current microcode revision. */
wrmsr_safe(MSR_BIOS_SIGN, 0);
rdmsr_safe(MSR_BIOS_SIGN, &rev1); /* Get new microcode revision. */
rdmsr_safe(MSR_BIOS_SIGN, &rev0); /* Get current microcode revision. */
rdmsr_safe(MSR_BIOS_SIGN, &rev1); /* Get new microcode revision. */
msr = rdmsr(MSR_BIOS_SIGN);
msrargs.msr = MSR_BIOS_SIGN;
msrargs.msr = MSR_BIOS_SIGN;