On Fri, Mar 21, 2014 at 12:04:32PM -0700, Venkatesh Srinivas wrote: > On Fri, Mar 21, 2014 at 10:46 AM, Peter Wu <peter@xxxxxxxxxxxxx> wrote: [skip] > When -cpu host is used, qemu/kvm passed the host CPUID F/M/S to the > guest. intel_pmu_cpu_*() -> intel_pmu_lbr_reset() uses rdmsr() / > wrmsr(), rather than the safe variants; if KVM does not support the > particular MSRs in question, you will see a #GP(0) there. See > https://lkml.org/lkml/2014/3/13/453 for a similar bug other PMU code. > When kernel is compiled with guest support all rdmsr()/wrmsr() become _safe(), so the question for Peter is if his guest kernel has guest support enabled? -- Gleb. -- 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
