Messages in this thread | | | Date | Wed, 9 Jul 2014 16:16:31 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH V4 1/2] perf ignore LBR and extra_regs. |
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On Tue, Jul 08, 2014 at 09:49:40AM -0700, kan.liang@intel.com wrote: > +/* > + * Under certain circumstances, access certain MSR may cause #GP. > + * The function tests if the input MSR can be safely accessed. > + */ > +static inline bool check_msr(unsigned long msr) > +{ > + u64 value; > + > + if (rdmsrl_safe(msr, &value) < 0) > + return false; > + if (wrmsrl_safe(msr, value) < 0) > + return false; > + return true; > +}
What does this thing return after patch 2? does the write still fault or will KVM silently take writes too? [unhandled content-type:application/pgp-signature] | |