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 D7026F34C58 for ; Mon, 13 Apr 2026 14:32:59 +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=8FOrjjF+6kpIPwIhyuBErdHc2zbKNZiJzW7lp24JF1U=; b=hM5RSmBNNwR281/m8ZwGHiRR0I mrgzb7/W6WfV21jkj6xrQ79Aul+6itCeQ+U8wRXitxNibhmSCLlB6tON1jwaBO8lUcLgLMGOZL8OZ SS/YlPBvYXHdwdl5PFA3ki3Mgt8a+t6GrYsKWVmXfYVvk8aMAegcnbyl2wivkSPEo1H/T3CNurJoW 3Wa6vqmWHgA/ixIhgiJF3akhAn3fI0ektFnTv/T5nuJTdevEQRfrIHfzFpyooiaPmBij/61ujg1C9 o3Cw2NBEr91uIzJgp7y2ZXz55+nnerZgFAWc3/KCjHDrxsuixBM/IN5Pv2cp9yjMT2R7Pbz+vEiSR IY3m2DNg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCILN-0000000Fs46-48Dm; Mon, 13 Apr 2026 14:32:53 +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 1wCILL-0000000Fs3c-1dn5 for linux-arm-kernel@lists.infradead.org; Mon, 13 Apr 2026 14:32:52 +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 7979E357A; Mon, 13 Apr 2026 07:32:44 -0700 (PDT) Received: from [10.1.196.46] (e134344.arm.com [10.1.196.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9CAAE3F641; Mon, 13 Apr 2026 07:32:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1776090770; bh=7esCCBp/1znd/3tqEVLoiCm1WeU7CehMh8AEaX3CYEE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=k4BtU/Q0snstkGHJl172mBwQTR3q9jPRBVpFiOeH7UiXZtvFzMev4irKp6FbXlovt SqakMn2ZGK4kZYlg8xh/oQNnOtCy6HKHw49B32HzQE9VVmHfNXjL9AlodhGN2SoOVw 7Ass3DpEcmHG3uPOcqV6vH/qigUD3feVoVuhfw/Q= Message-ID: <992f8a41-14df-40e1-a7d6-e4337514800b@arm.com> Date: Mon, 13 Apr 2026 15:32:44 +0100 MIME-Version: 1.0 User-Agent: Thunderbird Daily Subject: Re: [PATCH v6 00/40] arm_mpam: Add KVM/arm64 and resctrl glue code To: "Rose, Charles" Cc: "amitsinght@marvell.com" , "baisheng.gao@unisoc.com" , "baolin.wang@linux.alibaba.com" , "carl@os.amperecomputing.com" , "dave.martin@arm.com" , "david@kernel.org" , "dfustini@baylibre.com" , "fenghuay@nvidia.com" , "gshan@redhat.com" , "james.morse@arm.com" , "jonathan.cameron@huawei.com" , "kobak@nvidia.com" , "lcherian@marvell.com" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "peternewman@google.com" , "punit.agrawal@oss.qualcomm.com" , "quic_jiles@quicinc.com" , "reinette.chatre@intel.com" , "rohit.mathew@arm.com" , "scott@os.amperecomputing.com" , "sdonthineni@nvidia.com" , "tan.shaopeng@fujitsu.com" , "xhao@linux.alibaba.com" , "catalin.marinas@arm.com" , "will@kernel.org" , "corbet@lwn.net" , "maz@kernel.org" , "oupton@kernel.org" , "joey.gouly@arm.com" , "suzuki.poulose@arm.com" , "kvmarm@lists.linux.dev" , "zengheng4@huawei.com" , "linux-doc@vger.kernel.org" References: <20260313144617.3420416-1-ben.horgan@arm.com> Content-Language: en-US From: Ben Horgan 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-20260413_073251_552005_3514A5EC X-CRM114-Status: GOOD ( 13.36 ) 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 Charles, On 4/3/26 00:38, Rose, Charles wrote: > Hi Ben, > >> This version of the mpam missing pieces series sees a couple of things >> dropped or hidden. Memory bandwith utilization with free-running counters >> is dropped in preference of just always using 'mbm_event' mode (ABMC >> emulation) which simplifies the code and allows for, in the future, >> filtering by read/write traffic. So, for the interim, there is no memory >> bandwidth utilization support. CDP is hidden behind config expert as >> remount of resctrl fs could potentially lead to out of range PARTIDs being >> used and the fix requires a change in fs/resctrl. The setting of MPAM2_EL2 >> (for pkvm/nvhe) is dropped as too expensive a write for not much value. >> >> There are a couple of 'fixes' at the start of the series which address >> problems in the base driver but are only user visible due to this series. >> > > I tested cache occupancy and memory bandwidth allocation on a Dell PowerEdge XE8712 with NVIDIA Grace A02P. Both seem to work as expected. > > For the series: > > Tested-by: Charles Rose Thanks for testing!