linux-kernel - Re: [PATCH 1/2] perf/x86/intel/cstate: Remove PC3 support from LunarLake

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Message-ID: <9a391626-df9b-46bb-a160-2c39e3fb3c4f@linux.intel.com>
Date: Wed, 25 Jun 2025 14:48:04 -0400
From: "Liang, Kan" <kan.liang@...ux.intel.com>
To: Zhang Rui <rui.zhang@...el.com>, peterz@...radead.org
Cc: mingo@...hat.com, tglx@...utronix.de, bp@...en8.de,
 dave.hansen@...ux.intel.com, x86@...nel.org,
 linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
 ak@...ux.intel.com
Subject: Re: [PATCH 1/2] perf/x86/intel/cstate: Remove PC3 support from
 LunarLake



On 2025-06-24 9:08 p.m., Zhang Rui wrote:
> LunarLake doesn't support Package C3. Remove the PC3 residency counter
> support from LunarLake.
> 
> Fixes: 26579860fbd5 ("perf/x86/intel/cstate: Add Lunarlake support")
> Signed-off-by: Zhang Rui <rui.zhang@...el.com>

For the series,

Reviewed-by: Kan Liang <kan.liang@...ux.intel.com>

Thanks,
Kan

> ---
>  arch/x86/events/intel/cstate.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events/intel/cstate.c
> index ec753e39b007..6f5286a99e0c 100644
> --- a/arch/x86/events/intel/cstate.c
> +++ b/arch/x86/events/intel/cstate.c
> @@ -70,7 +70,7 @@
>   *			       perf code: 0x01
>   *			       Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,KNL,
>   *						GLM,CNL,KBL,CML,ICL,TGL,TNT,RKL,
> - *						ADL,RPL,MTL,ARL,LNL
> + *						ADL,RPL,MTL,ARL
>   *			       Scope: Package (physical package)
>   *	MSR_PKG_C6_RESIDENCY:  Package C6 Residency Counter.
>   *			       perf code: 0x02
> @@ -522,7 +522,6 @@ static const struct cstate_model lnl_cstates __initconst = {
>  				  BIT(PERF_CSTATE_CORE_C7_RES),
>  
>  	.pkg_events		= BIT(PERF_CSTATE_PKG_C2_RES) |
> -				  BIT(PERF_CSTATE_PKG_C3_RES) |
>  				  BIT(PERF_CSTATE_PKG_C6_RES) |
>  				  BIT(PERF_CSTATE_PKG_C10_RES),
>  };