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Subjectkvm_intel fails to load on Conroe CPUs running Linux 4.12
Dear linux developers,

since my upgrade from linux 4.11 to linux 4.12 the "kvm_intel" module does not load correctly anymore. "Modprobing" the kernel module gives an Input/Output error. It seems to be related to the CPU architecture and (to my knowledge) affects Conroe CPUs. I did a bisect and found the following commit as the guilty one:

commit 2c82878b0cb38fd516fd612c67852a6bbf282003
Author: Paolo Bonzini <>
Date: Mon Mar 27 14:37:28 2017 +0200

KVM: VMX: require virtual NMI support

Virtual NMIs are only missing in Prescott and Yonah chips. Both are obsolete
for virtualization usage---Yonah is 32-bit only even---so drop vNMI emulation.

Signed-off-by: Paolo Bonzini <>

Since the commit message only mentions Prescott and Yonah chips, I wanted to ask whether this commit is also intended to affect Conroe CPUs (which are probably still a bit more widespread). Do you see a solution to bring back support for Conroe chips?

Thank you for your hard work on the kernel!

Best regards,
Sebastian Rachuj

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