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 23954CAC5B0 for ; Mon, 29 Sep 2025 17:44:28 +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=2nT1i9g4Cw8/ERstNnGlgIxhUW3IxWJKDph/13ccc7E=; b=fUIckpkHVnxeSsGvnXZUbwB2xX D3PZlLFQvfXqRGCeifL54U+jI3sWY06t5E6FNRKsAiJJJWuu9XHcFgZLQzj13pGVj1m8LHs94bDjY Hy2ZK8mh6wa6zu7GYgND5FvvVHqZxtcVkZnW80tsqcrlaTWAvRZbX4yV5QZ7ZFgi0YrcNLCmdyrsK euNSAgjjM+e0epxYd4056JifG+a+F26qWa3tdNJ21IvKbInwQsGLtdEI57awQfchpDalukzJWPq9q AbmbxN4c0BODLlHuzbNdTFj27vJdA4dhF1AXJbEino1i0T9E40HV+56saYvGFzCrniFF2QEVTF4/L 7RmRifLg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v3HvC-000000039eg-0e0c; Mon, 29 Sep 2025 17:44:22 +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 1v3Hv9-000000039e6-1oO8 for linux-arm-kernel@lists.infradead.org; Mon, 29 Sep 2025 17:44:21 +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 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 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250929_104419_511035_1F945C10 X-CRM114-Status: GOOD ( 10.85 ) 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 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