Re: [RFC v1 3/9] KVM: x86: Implement MSR_IA32_PEBS_ENABLE read/write emulation

[Andi Kleen]

> +	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