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 61D9421D590; Mon, 29 Sep 2025 17:44:17 +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=1759167859; cv=none; b=iv0VdfMd9/E8gBXofRINsJ7ttfnnfLg3uGPUGcBRxcgRxKWPcmbFy/Fbr33sbZwOuyP77mPe4XV6fWU7lpK2tBF9rrRYYNTU58IROdxW10iVDa1aRIIK1yCm25q0BUGy7+bXta5yEpeI/yV23QrjX7rNoSGQ4XCJ09PPXAa44L8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759167859; c=relaxed/simple; bh=bfnQHr4jjAQW2+QnzwBqmT5DGW43MFHG/lQ8Y5Mvbrs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=A6oQq94EVdgXAd0j032uARY6KFdpnBvrxBcREsGiobh/87kJkGmPwJFG1IBs16n/D1yYwLQ4sLz3X6KZuliYjWpRJxxQ1zBBS6ftX7AA7HTZ1NjD/BxyuVygMXsrCWvXu/b+Gk8lhhuqxlPLsbhfSDdZmP8d0D00mRfmhQCMbSU= 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 52EC9150C; Mon, 29 Sep 2025 10:44:08 -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 0D5963F59E; Mon, 29 Sep 2025 10:44:10 -0700 (PDT) Message-ID: <4d037a74-966c-497d-a9b7-6cdffdf31020@arm.com> Date: Mon, 29 Sep 2025 18:44:09 +0100 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 07/29] arm_mpam: Add probe/remove for mpam msc driver and kbuild boiler plate To: Ben Horgan , 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 , fenghuay@nvidia.com, 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> <20250910204309.20751-8-james.morse@arm.com> Content-Language: en-GB From: James Morse In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Ben, On 17/09/2025 12:03, Ben Horgan wrote: > On 9/10/25 21:42, James Morse wrote: >> Probing MPAM is convoluted. MSCs that are integrated with a CPU may >> only be accessible from those CPUs, and they may not be online. >> Touching the hardware early is pointless as MPAM can't be used until >> the system-wide common values for num_partid and num_pmg have been >> discovered. >> >> Start with driver probe/remove and mapping the MSC. >> diff --git a/drivers/resctrl/Makefile b/drivers/resctrl/Makefile >> new file mode 100644 >> index 000000000000..92b48fa20108 >> --- /dev/null >> +++ b/drivers/resctrl/Makefile >> @@ -0,0 +1,4 @@ >> +obj-$(CONFIG_ARM64_MPAM_DRIVER) += mpam.o >> +mpam-y += mpam_devices.o >> + >> +cflags-$(CONFIG_ARM64_MPAM_DRIVER_DEBUG) += -DDEBUG > > s/cflags/ccflags/ Fixed, thanks, James