From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0B0612DAFDF; Fri, 3 Oct 2025 18:04:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759514657; cv=none; b=Fqfkg0d9+d1WdJ85+fsKWgMDi8nu8kRs3+FgvE9SLxt73n8RdPJRyfrPJhjDIuacGreBOWFf5RJfKqBlOtVMv8zwh73ivVkiSDVZ7HFyCewE0jvZUZHvBIodZdraGYgzVVEFTdSlgsZV1vwDEc7afhhp83hz5MPYtiVa9S5ykDI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759514657; c=relaxed/simple; bh=oYCdX+JUQjSpgfzx96CljhHT+QnJFx1k4nkGwNis/xc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=K4Zcif3mjKwQET4h5OZvIs2qacu0ePScWxJPSog6Le9jyWYNlAJv7XJjAhp0yPhlExWtsHPofcG9qeeHWv6hXHLyEeFnJn4NlvYJA/sONsgusXMm/EA8ceBvysitfFrETpi4Ev41FRliE/ljZobYNDlwS2ZGFZdAhk6j1CVtO/4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 6107F1596; Fri, 3 Oct 2025 11:04:07 -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 105593F5A1; Fri, 3 Oct 2025 11:04:09 -0700 (PDT) Message-ID: Date: Fri, 3 Oct 2025 19:04:08 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 19/29] arm_mpam: Use a static key to indicate when mpam is enabled To: Fenghua Yu , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org Cc: 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 , baisheng.gao@unisoc.com, Jonathan Cameron , Rob Herring , Rohit Mathew , Rafael Wysocki , Len Brown , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , Catalin Marinas , Will Deacon , Greg Kroah-Hartman , Danilo Krummrich References: <20250910204309.20751-1-james.morse@arm.com> <20250910204309.20751-20-james.morse@arm.com> <6acfa275-93ea-4bbe-843c-62911280d950@nvidia.com> Content-Language: en-GB From: James Morse In-Reply-To: <6acfa275-93ea-4bbe-843c-62911280d950@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Fenghua, On 26/09/2025 03:31, Fenghua Yu wrote: > On 9/10/25 13:42, 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 > nit...s/repsonse/response/ Oops, >> enable/disable the context switch of the MPAM system registers. >> >> Signed-off-by: James Morse > > Reviewed-by: Fenghua Yu Thanks! James