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 E5EC1CA0EFA for ; Sat, 23 Aug 2025 06:38:43 +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: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=GZG+u7gaWj/WNqGLnmADogf0GrMSU5x41dh+JtVVLFQ=; b=vxNOpiwYWBu10vDDj6MAbCnHaW E2CE38IqOlhZn+QblKvrkwzQgwWO6DIrVaJMWbuP+N818UCL8mnBoOl4L8ewm9rasAe+sHV6pjzg2 FBtjpGA50vONOU1JdI8YkTdfzlRBkHzA8AUfNl2my+1M1E58E28j+Gy8qhgbUa1+nd3VRTGMN/Rea Ewo33pXcytdkC7u8MzUCzSv1oVfvrDAQdtUy9uVY1gsc787h3Lgs/b90x18+XbBi8dqq77cSxddmX ch6fD38Nr5L9ZiYdoqSqDRPrZOJ4wo8bfPrWO0zMs/GEOauAbJhwwQl+xmz90izq6UfnH7fg00ZLS /er6gfOA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uphtc-000000049mu-42Z6; Sat, 23 Aug 2025 06:38:36 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1upTow-000000034dy-3MOY for linux-arm-kernel@bombadil.infradead.org; Fri, 22 Aug 2025 15:36:50 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=GZG+u7gaWj/WNqGLnmADogf0GrMSU5x41dh+JtVVLFQ=; b=QjWeeNmXLPxw6nqzuR2GKDt1Jb rMv3YuCMjthx0aw3UQNgntyrxwkzjQPOAvvJ1+AoQ8ZByu7FKhAJNBVa2MMcjhBEirKS44Ybo84la yOLNt2U3qkYr5Q3ZTzEjGOY+Lj77JqYhI2tu7SLeJuz2OIi3RPiV487JjFsO7FW9LD9mt3Hk8fioR ZOieiUvG613aue52VjrIi4aHPBVaehykapYPH2YFsT+3T5xmWa/sPRvnvZRoa6l8hbAseuNoJEImO tEJydtrgRxlZpAWjGwFsC1Gc/Ygkc8ecLcF3kR3oCVQ2AssYshQKDj4reC8DzCYg21MtAsHjzkenS lDnQSEDQ==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1upTos-00000000z4A-1Nep for linux-arm-kernel@lists.infradead.org; Fri, 22 Aug 2025 15:36:49 +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 3D22015A1; Fri, 22 Aug 2025 08:36:37 -0700 (PDT) Received: from merodach.members.linode.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 163153F63F; Fri, 22 Aug 2025 08:36:39 -0700 (PDT) From: James Morse To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org Cc: James Morse , shameerali.kolothum.thodi@huawei.com, 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 , Rex Nie , 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 , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Will Deacon , Greg Kroah-Hartman , Danilo Krummrich Subject: [PATCH 26/33] arm_mpam: Add helpers to allocate monitors Date: Fri, 22 Aug 2025 15:30:41 +0000 Message-Id: <20250822153048.2287-61-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20250822153048.2287-1-james.morse@arm.com> References: <20250822153048.2287-1-james.morse@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250822_163646_650345_5DBF81EB X-CRM114-Status: GOOD ( 12.04 ) 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 MPAM's MSC support a number of monitors, each of which supports bandwidth counters, or cache-storage-utilisation counters. To use a counter, a monitor needs to be configured. Add helpers to allocate and free CSU or MBWU monitors. Signed-off-by: James Morse --- drivers/resctrl/mpam_devices.c | 2 ++ drivers/resctrl/mpam_internal.h | 35 +++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c index aedd743d6827..e7e00c632512 100644 --- a/drivers/resctrl/mpam_devices.c +++ b/drivers/resctrl/mpam_devices.c @@ -348,6 +348,8 @@ mpam_class_alloc(u8 level_idx, enum mpam_class_types type, gfp_t gfp) class->level = level_idx; class->type = type; INIT_LIST_HEAD_RCU(&class->classes_list); + ida_init(&class->ida_csu_mon); + ida_init(&class->ida_mbwu_mon); list_add_rcu(&class->classes_list, &mpam_classes); diff --git a/drivers/resctrl/mpam_internal.h b/drivers/resctrl/mpam_internal.h index 23445aedbabd..4981de120869 100644 --- a/drivers/resctrl/mpam_internal.h +++ b/drivers/resctrl/mpam_internal.h @@ -231,6 +231,9 @@ struct mpam_class { /* member of mpam_classes */ struct list_head classes_list; + struct ida ida_csu_mon; + struct ida ida_mbwu_mon; + struct mpam_garbage garbage; }; @@ -306,6 +309,38 @@ struct mpam_msc_ris { struct mpam_garbage garbage; }; +static inline int mpam_alloc_csu_mon(struct mpam_class *class) +{ + struct mpam_props *cprops = &class->props; + + if (!mpam_has_feature(mpam_feat_msmon_csu, cprops)) + return -EOPNOTSUPP; + + return ida_alloc_range(&class->ida_csu_mon, 0, cprops->num_csu_mon - 1, + GFP_KERNEL); +} + +static inline void mpam_free_csu_mon(struct mpam_class *class, int csu_mon) +{ + ida_free(&class->ida_csu_mon, csu_mon); +} + +static inline int mpam_alloc_mbwu_mon(struct mpam_class *class) +{ + struct mpam_props *cprops = &class->props; + + if (!mpam_has_feature(mpam_feat_msmon_mbwu, cprops)) + return -EOPNOTSUPP; + + return ida_alloc_range(&class->ida_mbwu_mon, 0, + cprops->num_mbwu_mon - 1, GFP_KERNEL); +} + +static inline void mpam_free_mbwu_mon(struct mpam_class *class, int mbwu_mon) +{ + ida_free(&class->ida_mbwu_mon, mbwu_mon); +} + /* List of all classes - protected by srcu*/ extern struct srcu_struct mpam_srcu; extern struct list_head mpam_classes; -- 2.20.1