linux-kernel - Re: [PATCH] perf/x86/intel: use hexidecimal value for cpuid

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Message-ID: <20230308141619.GI2017917@hirez.programming.kicks-ass.net>
Date:   Wed, 8 Mar 2023 15:16:19 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Zhenyu Wang <zhenyuw@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: Re: [PATCH] perf/x86/intel: use hexidecimal value for cpuid

On Wed, Mar 08, 2023 at 11:15:01AM +0800, Zhenyu Wang wrote:
> It's easier to use hexidecimal value instead of decimal for reading
> and following with SDM doc, also align with other cpuid calls.

*shrug*..

> Signed-off-by: Zhenyu Wang <zhenyuw@...ux.intel.com>
> ---
>  arch/x86/events/intel/core.c | 2 +-
>  arch/x86/events/intel/lbr.c  | 2 +-
>  arch/x86/events/intel/pt.c   | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
> index 14f0a746257d..5af084198c8f 100644
> --- a/arch/x86/events/intel/core.c
> +++ b/arch/x86/events/intel/core.c
> @@ -5903,7 +5903,7 @@ __init int intel_pmu_init(void)
>  	 * Check whether the Architectural PerfMon supports
>  	 * Branch Misses Retired hw_event or not.
>  	 */
> -	cpuid(10, &eax.full, &ebx.full, &fixed_mask, &edx.full);
> +	cpuid(0xA, &eax.full, &ebx.full, &fixed_mask, &edx.full);
>  	if (eax.split.mask_length < ARCH_PERFMON_EVENTS_COUNT)
>  		return -ENODEV;

But now the data type names and the cpuid calls are no longer related.