CPUID_LEAF_EXT_21
cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_21 &&
if (cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_21) {
cp->cp_eax = CPUID_LEAF_EXT_21;
if (cpi->cpi_xmaxeax < CPUID_LEAF_EXT_21)
cp.cp_eax = CPUID_LEAF_EXT_21;
platform_cpuid_mangle(cpi->cpi_vendor, CPUID_LEAF_EXT_21, &cp);