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 5D10930274A; Fri, 12 Sep 2025 11:57:27 +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=1757678249; cv=none; b=ROlCKV5tjhNrkjIVH1nu8y8HoYjLluRJ2PKqlFbg5SdBqQLC8rCMkt07QhvOroqv74Q9wURjKS6Ig/3FHwTo8MqEI07xtmq95AS6euOOO4xJvSSdVi/yEYXMaz9E5GlSBtIXHwiaDlfoGUu3smKjQVzihL8RGauq+4wnEHGEX8M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757678249; c=relaxed/simple; bh=jxwn4iF8hNWaAU6J9N2S0KXwUK3vQgiVZmCMjYcCq+Q=; h=Date:From:To:CC:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=pbMnLW28bwBwU7ZPj+lRZ7j6L+1hcsvklbjI5xDA7MwOnGk+/B7YYtwGe8RGxRlJtxGNTsNns7wze0yXvmz1G6oUW9XmaksB02O5unA+F8HC7PijUGaHHhCYHQGRj8sDZZpe4eB1n1/t4DRPKWf45/fQYt6j8wJLOcHSTOpXIsA= 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 [172.18.186.31]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4cNXqm16PBz6L5Ch; Fri, 12 Sep 2025 19:53:08 +0800 (CST) Received: from frapeml500008.china.huawei.com (unknown [7.182.85.71]) by mail.maildlp.com (Postfix) with ESMTPS id D648C1402A4; Fri, 12 Sep 2025 19:57:24 +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 13:57:23 +0200 Date: Fri, 12 Sep 2025 12:57:22 +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 , Ben Horgan Subject: Re: [PATCH v2 16/29] arm_mpam: Add a helper to touch an MSC from any CPU Message-ID: <20250912125722.0000373e@huawei.com> In-Reply-To: <20250910204309.20751-17-james.morse@arm.com> References: <20250910204309.20751-1-james.morse@arm.com> <20250910204309.20751-17-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: lhrpeml500012.china.huawei.com (7.191.174.4) To frapeml500008.china.huawei.com (7.182.85.71) On Wed, 10 Sep 2025 20:42:56 +0000 James Morse wrote: > Resetting RIS entries from the cpuhp callback is easy as the > callback occurs on the correct CPU. This won't be true for any other > caller that wants to reset or configure an MSC. > > Add a helper that schedules the provided function if necessary. > > Callers should take the cpuhp lock to prevent the cpuhp callbacks from > changing the MSC state. > > Signed-off-by: James Morse > Reviewed-by: Ben Horgan Reviewed-by: Jonathan Cameron