Re: [PATCH 13/20] perf/x86/intel: Add SSP register support for arch-PEBS

[Andi Kleen]

> diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
> index f40b03adb5c7..7ed80f01f15d 100644
> --- a/arch/x86/events/core.c
> +++ b/arch/x86/events/core.c
> @@ -646,6 +646,16 @@ int x86_pmu_hw_config(struct perf_event *event)
>  			return -EINVAL;
>  	}
>  
> +	/* sample_regs_user never support SSP register. */
> +	if (unlikely(event->attr.sample_regs_user & BIT_ULL(PERF_REG_X86_SSP)))
> +		return -EINVAL;

Why not? It's somewhere.