Hello KVM developers, I've recently bought such a nice low-power board from VIA (EPIA M-850). The included VIA cpu (VIA NANO U3100) contains of in-silicon features (esp. AES and SHA encryption): /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */ #define X86_FEATURE_XSTORE (5*32+ 2) /* on-CPU RNG present (xstore insn) */ #define X86_FEATURE_XSTORE_EN (5*32+ 3) /* on-CPU RNG enabled */ #define X86_FEATURE_XCRYPT (5*32+ 6) /* on-CPU crypto (xcrypt insn) */ #define X86_FEATURE_XCRYPT_EN (5*32+ 7) /* on-CPU crypto enabled */ #define X86_FEATURE_ACE2 (5*32+ 8) /* Advanced Cryptography Engine v2 */ #define X86_FEATURE_ACE2_EN (5*32+ 9) /* ACE v2 enabled */ #define X86_FEATURE_PHE (5*32+ 10) /* PadLock Hash Engine */ #define X86_FEATURE_PHE_EN (5*32+ 11) /* PHE enabled */ #define X86_FEATURE_PMM (5*32+ 12) /* PadLock Montgomery Multiplier */ #define X86_FEATURE_PMM_EN (5*32+ 13) /* PMM enabled */ Now, I'd like to use these features in one of my linux driven kvm-guests to gain the performance of in-silicon encryption. See some benchmark what performance gain to expect: http://www.logix.cz/michal/devel/padlock/bench.xp I've found some useful informations about how to pass cpu features to kvm guests in generally. But they simply won't work if I try to pass the phe(_en)/pmm(_en) feautres to a kvm guest. So my questions by now, would be: Is it generally possible to passthrough these features? Thanks a lot. NicoP.-- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
