MSR_K8_UCODE_UPDATE
case MSR_K8_UCODE_UPDATE:
d->ret = wrmsr_safe(MSR_K8_UCODE_UPDATE, (uintptr_t)d->ptr);
wrmsr_safe(MSR_K8_UCODE_UPDATE, (uint64_t)(uintptr_t)data);
if (wrmsr_early_safe(MSR_K8_UCODE_UPDATE,
wrmsr(MSR_K8_UCODE_UPDATE, (uint64_t)(uintptr_t)data);