linux-kernel - Re: [PATCH v9 10/26] x86/resctrl: Introduce bitmap mbm_cntr_free

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Message-ID: <eff4e779-405b-4540-9884-19bdd34ddf6e@intel.com>
Date: Fri, 15 Nov 2024 16:11:57 -0800
From: Reinette Chatre <reinette.chatre@...el.com>
To: Babu Moger <babu.moger@....com>, <corbet@....net>, <tglx@...utronix.de>,
	<mingo@...hat.com>, <bp@...en8.de>, <dave.hansen@...ux.intel.com>
CC: <fenghua.yu@...el.com>, <x86@...nel.org>, <hpa@...or.com>,
	<thuth@...hat.com>, <paulmck@...nel.org>, <rostedt@...dmis.org>,
	<akpm@...ux-foundation.org>, <xiongwei.song@...driver.com>,
	<pawan.kumar.gupta@...ux.intel.com>, <daniel.sneddon@...ux.intel.com>,
	<perry.yuan@....com>, <sandipan.das@....com>, <kai.huang@...el.com>,
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	<maciej.wieczor-retman@...el.com>, <eranian@...gle.com>,
	<jpoimboe@...nel.org>, <thomas.lendacky@....com>
Subject: Re: [PATCH v9 10/26] x86/resctrl: Introduce bitmap mbm_cntr_free_map
 to track assignable counters

Hi Babu,

On 10/29/24 4:21 PM, Babu Moger wrote:
> Hardware provides a set of counters when mbm_assign_mode is supported.
> These counters are assigned to the MBM monitoring events of a CTRL_MON or
> MON group that needs to be tracked. The kernel must manage and track the
> available counters.
> 
> Introduce mbm_cntr_free_map bitmap to track available counters and set
> of routines to allocate and free the counters.
> 
> dom_data_init() requires mbm_cntr_assign state to initialize
> mbm_cntr_free_map bitmap. Move dom_data_init() after mbm_cntr_assign
> detection.
> 
> Signed-off-by: Babu Moger <babu.moger@....com>
> ---


Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>

Reinette