From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 40094CCA470 for ; Wed, 1 Oct 2025 09:51:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=A/NwGFNlW87OcLmDVM7Eo0FDOLZmKuLVZfoqAKWNI6U=; b=Hd2D5txuiRSJli/SwpaCt/f0JP DWC23Q5Veb5KqrrGw103HhJ1tB1hRJuiMZcu7TkEtq0NFGRu+pqt0k5BR4mZE1bBexIyEmQsO3n6o SA0WdB2SlE//j9wVqxCPOYbbdPGeOKtUzIc7Y8YqDQIezIPzXmVWNoRBaVKLfiYKcYe8BKBFdAXLY +yU3LEpQdP7OCCqyCmV3NUZ/VBB6kKXMM9j6spiNl6TgeTLPfAJ6i2heKbSV4VerKmU2/pmKXxS2E nM40RQONFiS2rqNQ4UeGak3gvOA0j24cZUWJ9Sw4f0bWldjzBai41O9b+rtN7DvGhpz7U9u9eVgTn B0UqGuSQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v3tUE-00000007Bx6-0Zyj; Wed, 01 Oct 2025 09:51:02 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v3tUB-00000007Bw3-1OJw for linux-arm-kernel@lists.infradead.org; Wed, 01 Oct 2025 09:51:00 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 01B0516F2; Wed, 1 Oct 2025 02:50:48 -0700 (PDT) Received: from [10.1.197.69] (eglon.cambridge.arm.com [10.1.197.69]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id ECE5A3F59E; Wed, 1 Oct 2025 02:50:50 -0700 (PDT) Message-ID: <7ac224c2-9014-4701-8d96-6df0a4bcc5f6@arm.com> Date: Wed, 1 Oct 2025 10:50:49 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 16/29] arm_mpam: Add a helper to touch an MSC from any CPU To: Jonathan Cameron Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, D Scott Phillips OS , carl@os.amperecomputing.com, lcherian@marvell.com, bobo.shaobowang@huawei.com, tan.shaopeng@fujitsu.com, baolin.wang@linux.alibaba.com, Jamie Iles , Xin Hao , peternewman@google.com, dfustini@baylibre.com, amitsinght@marvell.com, David Hildenbrand , Dave Martin , Koba Ko , Shanker Donthineni , fenghuay@nvidia.com, baisheng.gao@unisoc.com, 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 References: <20250910204309.20751-1-james.morse@arm.com> <20250910204309.20751-17-james.morse@arm.com> <20250912125722.0000373e@huawei.com> Content-Language: en-GB From: James Morse In-Reply-To: <20250912125722.0000373e@huawei.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251001_025059_411952_2A08865E X-CRM114-Status: GOOD ( 10.38 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Jonathan, On 12/09/2025 12:57, Jonathan Cameron wrote: > 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 Thanks! James