Line 132 of qemu/target-i386/helper2.c has /* currently not enabled for std i386 because not fully tested */ env->cpuid_ext2_features = (env->cpuid_features & 0x0183F3FF);
Which smells like a typo: I see no reason to make cpuid_ext2_features a masked version of cpuid_features. Would someone care to elaborate? Thanks, Dan.