> On Nov 10, 2016, at 3:40 PM, Kyle Huey <me@xxxxxxxxxxxx> wrote: > > Hardware support for faulting on the cpuid instruction is not required to > emulate it, because cpuid triggers a VM exit anyways. KVM handles the relevant > MSRs (MSR_PLATFORM_INFO and MSR_MISC_FEATURES_ENABLE) and upon a > cpuid-induced VM exit checks the cpuid faulting state and the CPL. > kvm_require_cpl is even kind enough to inject the GP fault for us. I think that for consistency you should also revise em_cpuid() of KVM instruction emulator. Otherwise it may be a potential security hazard (as far fetched as it currently seems). Nadav -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
