Re: GPF in intel_pmu_lbr_reset() with qemu -cpu host

Andi Kleen
2014-03-21T19:29:39Z

On Fri, Mar 21, 2014 at 06:42:40PM +0100, Peter Wu wrote:
> Hi,
>
> While trying to run QEMU with `-enable-kvm -host cpu`, I get a GPF in
> intel_pmu_lbr_reset():

Same problem as the RAPL problem earlier. KVM is lying to the guest
that it is a host CPU, but not implementing all MSRs the host
CPU supports.

KVM should really return 0 on unknown MSRs not #GP

-Andi