linux-kernel - Re: [RESEND] [PATCH] perf/x86/intel/uncore: Use boot_cpu_data.phys_proc

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Date:   Thu, 20 Sep 2018 22:55:39 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Masayoshi Mizuma <msys.mizuma@...il.com>
cc:     Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
        x86@...nel.org, Masayoshi Mizuma <m.mizuma@...fujitsu.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Kan Liang <kan.liang@...el.com>
Subject: Re: [RESEND] [PATCH] perf/x86/intel/uncore: Use boot_cpu_data.phys_proc_id
 instead of hardcorded phy id 0

On Mon, 10 Sep 2018, Masayoshi Mizuma wrote:

CC+ Kan

> From: Masayoshi Mizuma <m.mizuma@...fujitsu.com>
> 
> Physical package id 0 is not always exists. We should use
> boot_cpu_data.phys_proc_id here.
> 
> Signed-off-by: Masayoshi Mizuma <m.mizuma@...fujitsu.com>
> ---
>  arch/x86/events/intel/uncore_snbep.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
> index 51d7c11..53b981d 100644
> --- a/arch/x86/events/intel/uncore_snbep.c
> +++ b/arch/x86/events/intel/uncore_snbep.c
> @@ -3061,7 +3061,7 @@ static struct event_constraint bdx_uncore_pcu_constraints[] = {
>  
>  void bdx_uncore_cpu_init(void)
>  {
> -	int pkg = topology_phys_to_logical_pkg(0);
> +	int pkg = topology_phys_to_logical_pkg(boot_cpu_data.phys_proc_id);

Looks correct.

>  	if (bdx_uncore_cbox.num_boxes > boot_cpu_data.x86_max_cores)
>  		bdx_uncore_cbox.num_boxes = boot_cpu_data.x86_max_cores;
> -- 
> 2.18.0
> 
>