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 A5395F532CB for ; Tue, 24 Mar 2026 03:41:57 +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=rUeLGoeTwPTz7/suB9ZfTfJ1UEygTswX0AuYIezqldY=; b=2zZkI5zIGAIkcWtl4vJuhuLMHI +LDto4aZYhzj3I1iAcsD4YTMXTHbLdyjhhQa24bcfOnsf4QJ5EBAch8y08JzK9wL7YOegsnncjR6i hdqfG5INWqbxjdS0GZtjRA/5NdjFTGXT4VTB0d35fXf9VfjKzTgfii8xc7pQXHm5Q02U8dGcOJbRt A2VgsU1LrcPANif07tM3tH9dIEm8CMznxyJCqFuYKMHIkI9Ic2xHGytpq9u7SwiCkdggtX+XCnckb RvrRuJse0r9LV8zDxWwFJ4DvkUkPRZAReYMJpHBcPdpvZy1Xyu753TiI/x5TPiEEEWRji3JvjBxtU yPRqyCRA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w4seP-00000000V2f-1CDH; Tue, 24 Mar 2026 03:41:53 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w4seM-00000000V20-43dC for linux-arm-kernel@lists.infradead.org; Tue, 24 Mar 2026 03:41:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1774323710; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rUeLGoeTwPTz7/suB9ZfTfJ1UEygTswX0AuYIezqldY=; b=fxtOY5CahERjaV8uVFfcKsrj3FoOZzBIZ3yQof/aj8EksMU0oDf/MstGvQ67VAlXm/+AXM 1FawIJCc4FiFuqw5n4Z7Ny3LcViv5r7wDN0VJtBl3RJwQ/fFsq6iy+5vFdQGbk8qL6zUn0 WWFIWUF6y2DFtNz7k1s084KwwpPquoo= Received: from mail-pg1-f198.google.com (mail-pg1-f198.google.com [209.85.215.198]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-332-E-az7TL5O12-SFES5hZrog-1; Mon, 23 Mar 2026 23:41:48 -0400 X-MC-Unique: E-az7TL5O12-SFES5hZrog-1 X-Mimecast-MFC-AGG-ID: E-az7TL5O12-SFES5hZrog_1774323707 Received: by mail-pg1-f198.google.com with SMTP id 41be03b00d2f7-c7398e393a6so1407364a12.1 for ; Mon, 23 Mar 2026 20:41:48 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774323707; x=1774928507; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=rUeLGoeTwPTz7/suB9ZfTfJ1UEygTswX0AuYIezqldY=; b=PjWm5Imos/gPqjh9ivg086uFRUHkh7EHBW4pW2acmiDYlVApwnyNU1HbfZIB9q87FK rVTgk3XM/JbHJwraHPDPP7bq4qJgpQ6hDIezJP+PLANlGWRAWMTmvteATnVUFpD4IjcL gGByQSUlbyp1Kj3BRW49C9lxV2168ziJ0ZEr9O7W9cFh8PMPe7Ikeqi5EH734F2X5WtS LJCx4p4cf2E0p/vIZvMVMzNDmxkZhjU/5l2+0x9PJ3ScsmkK+UTYxW77X1z4JR1cykvu 1ToolLFGbzldaoytAnZf/r9hHilyl3Nz8WIcsLTKVxQk9ri/3gimhl+RmqwWWjFhJuGa CToQ== X-Forwarded-Encrypted: i=1; AJvYcCXs/22hxDRCMLdFYCGs6kXRuy2Ui99ksXZLvROWkHpwgP58WKERo4r4UppRBm7hCrUuX/+x+Bs4GOfWide1qtT5@lists.infradead.org X-Gm-Message-State: AOJu0YxKKMbK0F/OMdqM2/u3D374z6PA0CFzlY0FMhXPoGXU2R7nhdWb a6RCbSwoLObWjIrfmEPJYpXP6TzNlC1IyVNX5RNhuIlthMVQIZfdf/K5rfRfGOhywkK2mjyv03s XfI7we6Hgw+KObN0GDQA0/ysceUdkJ7LfAsgTmDwMDSl8cd0An+e9lRcGmq0mXxjJSjW3RpaSir mI X-Gm-Gg: ATEYQzx+pnEHNVKG2hyxFynFYiHpMulqMju4eH/HvewHYN7iP6WnJB6IKfpRMkLM+eR TFT2APH0FfUiI7UrU+AIkwVl1mpN7gI55tqLMV61Z2c5UCD1RaODVdHgz+b6Z3k3IfZ7zujI66D JMjRHzwWeUSoLaAW1S+DYfgrpY2xXE2QL07LmdnBH/ihQbiUz9923WxeAjIKIqT2TiuJ74ItAw5 RCsVSmp+2mNMVPChV+Cp7nsWM1Np1kj07CBy1+OmZqEUSRQWAmbP64xTO+tYNHCKw/5Z1H5Jdta LFApjeZMEhep5nl5XNpBYxtrDXHY2FUWLBeOs/sPTvZk0sNbuoEaFMlscvbXfIsuaUYnjRVxGLE aYPV+DtjD6R5Fl9UihWqGT/4amZ9l/W0jSNorV5ZauWyNz/7AzaVsRvRDi1Kr75Xz X-Received: by 2002:a05:6a21:4ed2:10b0:39b:f292:d7c0 with SMTP id adf61e73a8af0-39bf292e04dmr5956830637.58.1774323707473; Mon, 23 Mar 2026 20:41:47 -0700 (PDT) X-Received: by 2002:a05:6a21:4ed2:10b0:39b:f292:d7c0 with SMTP id adf61e73a8af0-39bf292e04dmr5956795637.58.1774323707126; Mon, 23 Mar 2026 20:41:47 -0700 (PDT) Received: from [192.168.68.51] (n175-34-8-244.mrk21.qld.optusnet.com.au. [175.34.8.244]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c74487b5b8csm9108581a12.31.2026.03.23.20.41.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Mar 2026 20:41:46 -0700 (PDT) Message-ID: <1ab278d0-59b4-4fcf-b72f-ddcdb4fc96b4@redhat.com> Date: Tue, 24 Mar 2026 13:41:32 +1000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 30/40] arm_mpam: resctrl: Add resctrl_arch_rmid_read() To: Ben Horgan 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, 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, Shaopeng Tan References: <20260313144617.3420416-1-ben.horgan@arm.com> <20260313144617.3420416-31-ben.horgan@arm.com> From: Gavin Shan In-Reply-To: <20260313144617.3420416-31-ben.horgan@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 3nF6VYjOGHfsps-kDm4EFAz1KLvOQQmHtW2JfxNY2tc_1774323707 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260323_204151_078653_7719BBEE X-CRM114-Status: GOOD ( 12.31 ) 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 On 3/14/26 12:46 AM, Ben Horgan wrote: > From: James Morse > > resctrl uses resctrl_arch_rmid_read() to read counters. CDP emulation means > the counter may need reading in three different ways. > > The helpers behind the resctrl_arch_ functions will be re-used for the ABMC > equivalent functions. > > Add the rounding helper for checking monitor values while we're here. > > Tested-by: Gavin Shan > Tested-by: Shaopeng Tan > Tested-by: Peter Newman > Tested-by: Zeng Heng > Reviewed-by: Shaopeng Tan > Reviewed-by: Jonathan Cameron > Signed-off-by: James Morse > Signed-off-by: Ben Horgan > --- > Changes since rfc: > cfg initialisation style > code flow at end of read_mon_cdp_safe() > > Changes since v2: > Whitespace changes > > Changes since v3: > Update function signatures > Remove abmc check > > Changes since v5: > don't read mbwu > remove reset code as only needed for mbwu > --- > drivers/resctrl/mpam_resctrl.c | 82 ++++++++++++++++++++++++++++++++++ > include/linux/arm_mpam.h | 5 +++ > 2 files changed, 87 insertions(+) > Reviewed-by: Gavin Shan