Re: [PATCH 2/2] x86/cpu/amd: Enable the fixed intructions retired free counter IRPERF

[Andi Kleen]

> +	if (cpu_has(c, X86_FEATURE_IRPERF) &&
> +	    !(c->x86 == 0x17 && c->x86_model <= 0x1f))

Such checks are normally through a x86_pmu lag or possibly a X86_BUG_* flag

> +		msr_set_bit(MSR_K7_HWCR, MSR_K7_HWCR_IRPERF_EN_BIT);
>  }
>  
>  #ifdef CONFIG_X86_32
> -- 
> 2.24.1
>