Re: [PATCH kvm/queue v2 1/3] KVM: x86/pmu: Replace pmu->available_event_types with a new BITMAP

[Paolo Bonzini]

On 1/17/22 09:53, Like Xu wrote:
> +/* Mapping between CPUID 0x0A.EBX bit vector and enum perf_hw_id. */
> +static inline int map_unavail_bit_to_perf_hw_id(int bit)
> +{
> +	switch (bit) {
> +	case 0:
> +	case 1:
> +		return bit;
> +	case 2:
> +		return PERF_COUNT_HW_BUS_CYCLES;
> +	case 3:
> +	case 4:
> +	case 5:
> +	case 6:
> +		return --bit;
> +	}
> +
> +	return PERF_COUNT_HW_MAX;
> +}
> +

Please use an array here (e.g. cpuid_event_to_perf_hw_id_map[]).

Paolo