On Fri, Mar 14, 2014 at 09:44:29AM +0100, Peter Zijlstra wrote: > On Thu, Mar 13, 2014 at 12:36:26PM -0700, Venkatesh Srinivas wrote: > > CPUs which should support the RAPL counters according to > > Family/Model/Stepping may still issue #GP when attempting to access > > the RAPL MSRs. This may happen when Linux is running under KVM and > > we are passing-through host F/M/S data, for example. Use rdmsrl_safe > > to first access the RAPL_POWER_UNIT MSR; if this fails, do not > > attempt to use this PMU. > > This kvm thing is getting tedious :-(
It sounds bogus to me too, VMs are supposed to return 0 on reading unknown MSRs, no #GP. -Andi -- [email protected] -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
