> + case MSR_IA32_PEBS_ENABLE:> + if (pmu->pebs_enable == data)> + return 0;> + if (!(data & pmu->pebs_enable_mask) &&> + (data & MSR_IA32_PEBS_OUTPUT_MASK) ==> + MSR_IA32_PEBS_OUTPUT_PT) {> + pebs_enable_changed(pmu, data);> + return 0;> + }Need #GP for bad values