Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > On 06/08/2017 23:23, Sebastian Rachuj wrote: >> On 06.08.2017 23:10, Paolo Bonzini wrote: >>> On 05/08/2017 21:26, Sebastian Rachuj wrote: >>>> 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: >>> >>> What is your cpuinfo? I tested on a Conroe Xeon X3220 (family 6, >>> model 15, stepping 11) when I posted that patch, and it did have virtual >>> NMIs. >> >> Thank you for looking into the issue. My cpuinfo is as follows: > > Looks like Intel was already differentiating virtualization features > across SKUs. Please run the attached script as root to see what other > things are different (apparently) between non-Xeon and Xeon Conroes. There may be another explanation. If I remember correctly from my days in Intel, Intel initially sold CMWA (Conroe) B-step. The next step, E-step, introduced a couple of new features, which may have included vNMI. The CPU of Sebastian appears to be B1 according to cpuinfo. Nadav
