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 52E3AF4BB6C for ; Tue, 24 Feb 2026 17:59:24 +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=u4utsMnQanO351wh18VC6PeXbGVzWNGEEZIvIh1PlKk=; b=NG2G9VWQj63BlDkcFoRS9wKYY7 OJMCWydy4LEepe3PSl64BY+pUi5e7SM05s5fzULT79RKFHlSgn9tuASvWoT1XBmkSYnYWZxLs7imE z0eJURTIY8yPbCLTooDWJVJ13aEEhU1s5UmfLBNZZB6D87PeE32jMwKhADpcJte2BAmGWKQDjyXO/ Z+ZGdOTKuRNyv3WnfphKETi0FPJ3H7SQJmTvO8AgPRt3KPl1DsfJc4w/ivjBhjninY+tHDtxLsdQ2 Xoqs+FYmd+sTuj2mCL45j2Ifs99T9Zadmi303ckghVVTGlhfffsOyBkeV1szB9VS8QPExclP4PMKr rmU3Y9+A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vuwgi-00000002Y28-2xwY; Tue, 24 Feb 2026 17:59:12 +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 1vuwgW-00000002XmC-406M for linux-arm-kernel@bombadil.infradead.org; Tue, 24 Feb 2026 17:59:00 +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=u4utsMnQanO351wh18VC6PeXbGVzWNGEEZIvIh1PlKk=; b=RZmFThLxMa9w9OtZsHJLUlfmDM srUvSoXnEyb6vFKxPZ0Tu4zOrHlcksc/4CN/dwwZzJo9eGormR05xB0VQl7IonzNWm8jdsdvKYviw eshgWPSnUsDGeA89ia1SUhw1JsLEVTlzUW1LIiJGI1NByk+NGaLn1y8ChOShXGWCJrrfvIHf4Ergi JqTIHIw1U5/a7bjx50unpMi7G6A8Xb4AxOIhHZVGYgkkyJIIldcRACae0MssR3aKoHbqKf6IbU3Ff LpemepxbEx/DSq9gvJlWaxsIzIdTu+sAq5D381cCZ9ta6t3i/e0rki/tx5rFKXSPl8oGi5ed0I6X7 B2t/El6A==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vuwgS-00000007dld-2wRS for linux-arm-kernel@lists.infradead.org; Tue, 24 Feb 2026 17:58:58 +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 4BF251595; Tue, 24 Feb 2026 09:58:49 -0800 (PST) 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 AA9273F59E; Tue, 24 Feb 2026 09:58:50 -0800 (PST) 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 v5 16/41] arm_mpam: resctrl: Add resctrl_arch_get_config() Date: Tue, 24 Feb 2026 17:56:55 +0000 Message-ID: <20260224175720.2663924-17-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260224175720.2663924-1-ben.horgan@arm.com> References: <20260224175720.2663924-1-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-20260224_175857_145301_B4A31B73 X-CRM114-Status: UNSURE ( 8.73 ) 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 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 5f482c6293e7..d5caab6b8545 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -168,6 +168,49 @@ 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