linux-kernel - RE: [PATCH v3 20/29] arm_mpam: Allow configuration to be applied and restored during cpu online

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Message-ID:
 <OSZPR01MB879846D16BB360C90B5A2FA38BFAA@OSZPR01MB8798.jpnprd01.prod.outlook.com>
Date: Wed, 29 Oct 2025 07:09:07 +0000
From: "Shaopeng Tan (Fujitsu)" <tan.shaopeng@...itsu.com>
To: 'James Morse' <james.morse@....com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-acpi@...r.kernel.org"
	<linux-acpi@...r.kernel.org>
CC: D Scott Phillips OS <scott@...amperecomputing.com>,
	"carl@...amperecomputing.com" <carl@...amperecomputing.com>,
	"lcherian@...vell.com" <lcherian@...vell.com>, "bobo.shaobowang@...wei.com"
	<bobo.shaobowang@...wei.com>, "baolin.wang@...ux.alibaba.com"
	<baolin.wang@...ux.alibaba.com>, Jamie Iles <quic_jiles@...cinc.com>, Xin Hao
	<xhao@...ux.alibaba.com>, "peternewman@...gle.com" <peternewman@...gle.com>,
	"dfustini@...libre.com" <dfustini@...libre.com>, "amitsinght@...vell.com"
	<amitsinght@...vell.com>, David Hildenbrand <david@...hat.com>, Dave Martin
	<dave.martin@....com>, Koba Ko <kobak@...dia.com>, Shanker Donthineni
	<sdonthineni@...dia.com>, "fenghuay@...dia.com" <fenghuay@...dia.com>,
	"baisheng.gao@...soc.com" <baisheng.gao@...soc.com>, Jonathan Cameron
	<jonathan.cameron@...wei.com>, Rob Herring <robh@...nel.org>, Rohit Mathew
	<rohit.mathew@....com>, Rafael Wysocki <rafael@...nel.org>, Len Brown
	<lenb@...nel.org>, Lorenzo Pieralisi <lpieralisi@...nel.org>, Hanjun Guo
	<guohanjun@...wei.com>, Sudeep Holla <sudeep.holla@....com>, Catalin Marinas
	<catalin.marinas@....com>, Will Deacon <will@...nel.org>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Danilo Krummrich <dakr@...nel.org>, Jeremy
 Linton <jeremy.linton@....com>, Gavin Shan <gshan@...hat.com>, Dave Martin
	<Dave.Martin@....com>, Ben Horgan <ben.horgan@....com>
Subject: RE: [PATCH v3 20/29] arm_mpam: Allow configuration to be applied and
 restored during cpu online


> When CPUs come online the MSC's original configuration should be restored.
> 
> Add struct mpam_config to hold the configuration. This has a bitmap of
> features that were modified. 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>
> Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>
> Reviewed-by: Ben Horgan <ben.horgan@....com>
> Tested-by: Fenghua Yu <fenghuay@...dia.com>

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