[PATCH 2/5] arm64: perf: Simplify registration boilerplate

[Mark Rutland]

On Tue, Dec 07, 2021 at 06:20:40PM +0000, Robin Murphy wrote:
> The arm_pmu framework requires map_event to be non-NULL, so let
> armv8_pmu_init() treat NULL as a default value for the generic PMUv3
> event map and simplify the boilerplate in the callers a bit.
> 
> Signed-off-by: Robin Murphy <robin.murphy at arm.com>
> ---
>  arch/arm64/kernel/perf_event.c | 32 +++++++++++---------------------
>  1 file changed, 11 insertions(+), 21 deletions(-)
> 
> diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
> index b4044469527e..57720372da62 100644
> --- a/arch/arm64/kernel/perf_event.c
> +++ b/arch/arm64/kernel/perf_event.c
> @@ -1128,7 +1128,7 @@ static int armv8_pmu_init(struct arm_pmu *cpu_pmu, char *name,
>  	cpu_pmu->filter_match		= armv8pmu_filter_match;
>  
>  	cpu_pmu->name			= name;
> -	cpu_pmu->map_event		= map_event;
> +	cpu_pmu->map_event		= map_event ?: armv8_pmuv3_map_event;
>  	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_EVENTS] = events ?
>  			events : &armv8_pmuv3_events_attr_group;
>  	cpu_pmu->attr_groups[ARMPMU_ATTR_GROUP_FORMATS] = format ?

Acked-by: Mark Rutland <mark.rutland at arm.com>

I'll leave it to will to pick this.

Mark.

> @@ -1147,14 +1147,12 @@ static int armv8_pmu_init_nogroups(struct arm_pmu *cpu_pmu, char *name,
>  
>  static int armv8_pmuv3_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_pmuv3",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_pmuv3", NULL);
>  }
>  
>  static int armv8_a34_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a34",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a34", NULL);
>  }
>  
>  static int armv8_a35_pmu_init(struct arm_pmu *cpu_pmu)
> @@ -1171,8 +1169,7 @@ static int armv8_a53_pmu_init(struct arm_pmu *cpu_pmu)
>  
>  static int armv8_a55_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a55",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a55", NULL);
>  }
>  
>  static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu)
> @@ -1183,8 +1180,7 @@ static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu)
>  
>  static int armv8_a65_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a65",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a65", NULL);
>  }
>  
>  static int armv8_a72_pmu_init(struct arm_pmu *cpu_pmu)
> @@ -1201,38 +1197,32 @@ static int armv8_a73_pmu_init(struct arm_pmu *cpu_pmu)
>  
>  static int armv8_a75_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a75",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a75", NULL);
>  }
>  
>  static int armv8_a76_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a76",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a76", NULL);
>  }
>  
>  static int armv8_a77_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a77",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a77", NULL);
>  }
>  
>  static int armv8_a78_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a78",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_cortex_a78", NULL);
>  }
>  
>  static int armv8_e1_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_neoverse_e1",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_neoverse_e1", NULL);
>  }
>  
>  static int armv8_n1_pmu_init(struct arm_pmu *cpu_pmu)
>  {
> -	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_neoverse_n1",
> -				       armv8_pmuv3_map_event);
> +	return armv8_pmu_init_nogroups(cpu_pmu, "armv8_neoverse_n1", NULL);
>  }
>  
>  static int armv8_thunder_pmu_init(struct arm_pmu *cpu_pmu)
> -- 
> 2.28.0.dirty
>