From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1B0C2305E02; Fri, 12 Sep 2025 12:13:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757679223; cv=none; b=QpsdOYMSgvZID7YOc2RWCvFTles0MjlSRCFUEz49416PWBCHKiRQDeU3fRSuza2JR/IwOMCw1wY3RqpfHGAlQGBAVmQL63iCpEuB5LU8bPAKmkb9xctxGDqmMpSUv1nOHEl8KeJkgfV1Hs2IAip9cisGnxdMH7y2XfxJbaPKepo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757679223; c=relaxed/simple; bh=upneNEJNBPsET5hfybB3RegJajbqbz4uG27w/RE7770=; h=Date:From:To:CC:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ZMu2YxnR6vU6U4XfMth1xCtjzguJGE96Qr6y9cSufNJvsJ8HugUX5zZMlI7PEX8IJf7gVs646cVsRZf/XustVnh6kmemDtIE+DMQkPVyHdx9721eLPxNYB5MGRVmlgC9o6s7ciw/S6fPqGCxHjSG4ELqX2ZnPFzCWlzm0Y6nINw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4cNYBV1LJvz6L5Hp; Fri, 12 Sep 2025 20:09:22 +0800 (CST) Received: from frapeml500008.china.huawei.com (unknown [7.182.85.71]) by mail.maildlp.com (Postfix) with ESMTPS id EADF21400F4; Fri, 12 Sep 2025 20:13:38 +0800 (CST) Received: from localhost (10.203.177.15) by frapeml500008.china.huawei.com (7.182.85.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 12 Sep 2025 14:13:37 +0200 Date: Fri, 12 Sep 2025 13:13:36 +0100 From: Jonathan Cameron To: James Morse CC: , , , D Scott Phillips OS , , , , , , Jamie Iles , Xin Hao , , , , David Hildenbrand , Dave Martin , Koba Ko , Shanker Donthineni , , , Rob Herring , Rohit Mathew , "Rafael Wysocki" , Len Brown , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , Catalin Marinas , "Will Deacon" , Greg Kroah-Hartman , Danilo Krummrich Subject: Re: [PATCH v2 19/29] arm_mpam: Use a static key to indicate when mpam is enabled Message-ID: <20250912131336.000014d3@huawei.com> In-Reply-To: <20250910204309.20751-20-james.morse@arm.com> References: <20250910204309.20751-1-james.morse@arm.com> <20250910204309.20751-20-james.morse@arm.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: lhrpeml100009.china.huawei.com (7.191.174.83) To frapeml500008.china.huawei.com (7.182.85.71) On Wed, 10 Sep 2025 20:42:59 +0000 James Morse wrote: > Once all the MSC have been probed, the system wide usable number of > PARTID is known and the configuration arrays can be allocated. > > After this point, checking all the MSC have been probed is pointless, > and the cpuhp callbacks should restore the configuration, instead of > just resetting the MSC. > > Add a static key to enable this behaviour. This will also allow MPAM > to be disabled in repsonse to an error, and the architecture code to > enable/disable the context switch of the MPAM system registers. > > Signed-off-by: James Morse Seems fine to me (other than the TODO move to arch code that should probably be resolved. Reviewed-by: Jonathan Cameron