On Tue, 8 Nov 2016, Kyle Huey wrote: > Intel supports faulting on the CPUID instruction beginning with Ivy Bridge. > When enabled, the processor will fault on attempts to execute the CPUID > instruction with CPL>0. This will allow a ptracer to emulate the CPUID > instruction. > > Bit 31 of MSR_PLATFORM_INFO advertises support for this feature. It is > documented in detail in Section 2.3.2 of > http://www.intel.com/content/dam/www/public/us/en/documents/application-notes/virtualization-technology-flexmigration-application-note.pdf Can you please stick that document into the kernel bugzilla, as it's going to be on a different place before this gets merged into Linus tree? See: http://lkml.kernel.org/r/1478631281-5061-1-git-send-email-kan.liang@xxxxxxxxx > + static const struct msr_bit msr_bits[] = { > + { X86_FEATURE_CPUID_FAULT, MSR_PLATFORM_INFO, 31 }, Can you please make that PLATINFO_CPUID_FAULT_BIT instead of 31? Thanks, tglx -- 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
