linux-kernel - RE: [PATCH v5 23/34] arm_mpam: Allow configuration to be applied and restored during cpu online

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Message-ID:
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Date: Tue, 18 Nov 2025 05:21:46 +0000
From: "Shaopeng Tan (Fujitsu)" <tan.shaopeng@...itsu.com>
To: 'Ben Horgan' <ben.horgan@....com>, "james.morse@....com"
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Subject: RE: [PATCH v5 23/34] arm_mpam: Allow configuration to be applied and
 restored during cpu online

> From: James Morse <james.morse@....com>
> 
> When CPUs come online the MSC's original configuration should be restored.
> 
> Add struct mpam_config to hold the configuration. For each component, this
> has a bitmap of features that have been changed from the reset values. The
> mpam_config is also used on RIS reset where all bits are set to ensure all
> features are reset.
> 
> Once the maximum partid is known, allocate a configuration array for each
> component, and reprogram each RIS configuration from this.
> 
> CC: Dave Martin <Dave.Martin@....com>
> Signed-off-by: James Morse <james.morse@....com>
> Cc: Shaopeng Tan (Fujitsu) tan.shaopeng@...itsu.com
> Cc: Peter Newman peternewman@...gle.com
> Reviewed-by: Gavin Shan <gshan@...hat.com>
> Tested-by: Carl Worth <carl@...amperecomputing.com>
> Tested-by: Gavin Shan <gshan@...hat.com>
> Tested-by: Zeng Heng <zengheng4@...wei.com>
> Tested-by: Shaopeng Tan <tan.shaopeng@...fujitsu.com>
> Signed-off-by: Ben Horgan <ben.horgan@....com>
> ---

Reviewed-by: Shaopeng Tan <tan.shaopeng@...fujitsu.com>