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 56656CA101F for ; Wed, 10 Sep 2025 20:45:34 +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=BtSOcLPU9xkvbTjlsaLwpVk953JzxsEd3R3PaMZwR0A=; b=ZrKVVVnXfodbIrYVp75vdmDZgj ypHMjcfxHTDM5lM0jRDCXvkSJa7cXGVhN61y7YtZ3kIvSR47eNl0Owmb6x0Nq0YRKJ2syhNuXSMLP L1/YdtQKhRUvDmKz4XKUZ6q1/jBsx3UmDz3/UaearobktGZbP2QuEZVIhIJRLvQ93P+SBFrrPnaTa Gdl9Miq34zoK4Fmdn86ve19ysndJkQAR8SW/IU2saMu8dlMcT4nnVDPImzwWEAfrhyl2HYodlCOvH FVEoSRniCi9rbrPSoq1HglbcbEVjoI4fbkQugIv2rxlGIgWouTZGmKjkxlFStef6j+8rVrNP64Pit BIEFtIdg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uwRh2-0000000GeYU-3XHR; Wed, 10 Sep 2025 20:45:28 +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 1uwRgv-0000000GeOF-3kt4 for linux-arm-kernel@lists.infradead.org; Wed, 10 Sep 2025 20:45:27 +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 E2ECB1EDB; Wed, 10 Sep 2025 13:45:12 -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 7869D3F63F; Wed, 10 Sep 2025 13:45:16 -0700 (PDT) From: James Morse To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org Cc: James Morse , 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 , Ben Horgan Subject: [PATCH v2 22/29] arm_mpam: Add helpers to allocate monitors Date: Wed, 10 Sep 2025 20:43:02 +0000 Message-Id: <20250910204309.20751-23-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20250910204309.20751-1-james.morse@arm.com> References: <20250910204309.20751-1-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-20250910_134522_073812_AAFC867D X-CRM114-Status: GOOD ( 12.11 ) 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 Reviewed-by: Ben Horgan --- 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 f536ebbcf94e..cf190f896de1 100644 --- a/drivers/resctrl/mpam_devices.c +++ b/drivers/resctrl/mpam_devices.c @@ -340,6 +340,8 @@ mpam_class_alloc(u8 level_idx, enum mpam_class_types type) 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 326ba9114d70..81c4c2bfea3d 100644 --- a/drivers/resctrl/mpam_internal.h +++ b/drivers/resctrl/mpam_internal.h @@ -210,6 +210,9 @@ 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; }; @@ -288,6 +291,38 @@ 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; -- 2.39.5