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 BA816105F7A6 for ; Fri, 13 Mar 2026 14:47:59 +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: 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=14QQC0yUJ5rblwlP9mdOh7jM4tOvx7ReTnueB7kCj5g=; b=QlSabm1NNcLGmXpx91BL196eOa aExZ5RvDyYWzrw/8kwVDSSsWs4GKqI1rpTTbF7MSqlIcOP5dkH9b/GuqO3kge1V+sYLkus+zCl2IU 3xjzIrU0WCpCipdIcQ4FJmOhiI8f6hWZ4Kyq+EJQ3uhUyHDcSGHtK91eflhBqMkJD6qyrCbdcqMMx 7ioQ1UWAYPghfwlUwZU3oU+zcHJMDUfFUbyLA4lRi0y1ciH4/H6ACthX3Bl0sjaebtCpHngc3AHiX oHodsOETQ8n/kx+gSkS1UmtAfdy6WVvORWSEqFar53vEnqWxqOUf4v2u/9pz2QpJ0l/bkXN8iAxTK PK/+9U5Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w13nu-00000000RLK-20vu; Fri, 13 Mar 2026 14:47:54 +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 1w13nt-00000000RIo-1XDk for linux-arm-kernel@bombadil.infradead.org; Fri, 13 Mar 2026 14:47:53 +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=14QQC0yUJ5rblwlP9mdOh7jM4tOvx7ReTnueB7kCj5g=; b=eftakjcRPiKAhEtK8TUyvLsZ4U TwXydE1ITWEpocgnpm8MdyQG1qqyaPPY/jWsxykiiASsF4+ETaMEYIEqMh6gcBSdZp0UKKiH20mUL GaoNLcLGwRzl8k3Nv7jmlM36n/J4IPF5nVBGbx/SdnJ6oXrrb7cPM/hHEXy55pwJ+EGJwt5wH1713 9n5KQotL5mVptkAuciJJtosYDa3gnR0oDbCfwEGx4j82MZXqDscshpDjZUUFaS7oyPfeEeiGFc6zS BGOs8ZMQvCCJuqd2849yvApgO+uYrC1k6DGhkc0RcnmIQpelRR0A3tcgi+5aqWWQXRhMGjtuaQRRS hzNrTp0w==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w13nk-00000003Zut-3g9z for linux-arm-kernel@lists.infradead.org; Fri, 13 Mar 2026 14:47:51 +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 888FC22C7; Fri, 13 Mar 2026 07:47:37 -0700 (PDT) Received: from e134344.cambridge.arm.com (e134344.arm.com [10.1.196.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id BC34C3F7BD; Fri, 13 Mar 2026 07:47:39 -0700 (PDT) From: Ben Horgan To: ben.horgan@arm.com 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, Shaopeng Tan Subject: [PATCH v6 17/40] arm_mpam: resctrl: Add resctrl_arch_get_config() Date: Fri, 13 Mar 2026 14:45:54 +0000 Message-ID: <20260313144617.3420416-18-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260313144617.3420416-1-ben.horgan@arm.com> References: <20260313144617.3420416-1-ben.horgan@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-20260313_144749_526983_FBEE4C4E X-CRM114-Status: UNSURE ( 8.34 ) X-CRM114-Notice: Please train this message. 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 From: James Morse Implement resctrl_arch_get_config() by testing the live configuration for a CPOR bitmap. For any other configuration type return the default. Tested-by: Gavin Shan Tested-by: Shaopeng Tan Tested-by: Peter Newman Tested-by: Zeng Heng Tested-by: Punit Agrawal Reviewed-by: Zeng Heng Reviewed-by: Shaopeng Tan Reviewed-by: Jonathan Cameron Signed-off-by: James Morse Signed-off-by: Ben Horgan --- drivers/resctrl/mpam_resctrl.c | 43 ++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index 66cd6d813733..1d9004179374 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -170,6 +170,49 @@ static int mpam_resctrl_pick_domain_id(int cpu, struct mpam_component *comp) return comp->comp_id; } +u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_ctrl_domain *d, + u32 closid, enum resctrl_conf_type type) +{ + u32 partid; + struct mpam_config *cfg; + struct mpam_props *cprops; + struct mpam_resctrl_res *res; + struct mpam_resctrl_dom *dom; + enum mpam_device_features configured_by; + + lockdep_assert_cpus_held(); + + if (!mpam_is_enabled()) + return resctrl_get_default_ctrl(r); + + res = container_of(r, struct mpam_resctrl_res, resctrl_res); + dom = container_of(d, struct mpam_resctrl_dom, resctrl_ctrl_dom); + cprops = &res->class->props; + + partid = resctrl_get_config_index(closid, type); + cfg = &dom->ctrl_comp->cfg[partid]; + + switch (r->rid) { + case RDT_RESOURCE_L2: + case RDT_RESOURCE_L3: + configured_by = mpam_feat_cpor_part; + break; + default: + return resctrl_get_default_ctrl(r); + } + + if (!r->alloc_capable || partid >= resctrl_arch_get_num_closid(r) || + !mpam_has_feature(configured_by, cfg)) + return resctrl_get_default_ctrl(r); + + switch (configured_by) { + case mpam_feat_cpor_part: + return cfg->cpbm; + default: + return resctrl_get_default_ctrl(r); + } +} + void resctrl_arch_reset_all_ctrls(struct rdt_resource *r) { struct mpam_resctrl_res *res; -- 2.43.0