Messages in this thread | | | From | tedheadster <> | Date | Tue, 31 Jul 2018 08:57:33 -0400 | Subject | Re: [PATCH] x86: kvm: Restrict X86_FEATURE_VMMCALL to x86_64 platform |
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> > This shouldn't be necessary; for systems that don't have virtualization > extensions, the comment explains why setting X86_FEATURE_VMMCALL is safe. > > But it is also wrong, because you can run a 32-bit kernel as a guest on > a 64-bit processor, and then it should set X86_FEATURE_VMMCALL because > the processor has the vmmcall instruction and not Intel's vmcall. >
Paolo, I'm running this on a bare metal machine (no virtualization) with a 32-bit AMD i486 class cpu. Should the feature be showing up in /proc/cpuinfo under the 'flags' line? It does on my machine, and it looked wrong to me.
- Matthew
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