From nobody Mon Feb 9 20:09:39 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 76CC134D4DA for ; Fri, 19 Dec 2025 18:13:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766168020; cv=none; b=jZRG8fgqvlaGgqz6tuxAHhFvZ9a8jNUqjRy+2NBni1ragjcdeps8MAWv1F5jWajlarQ/K2/8o+x9VNHzaiz/ETHynvsPIIebLtP4xpzm8OeSb7J33ODDO2uuPrxqhMQMIr7oEQIxV7rykkfRBAdnsAa8Ldt3DxalS2Zo9aAXqIs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766168020; c=relaxed/simple; bh=3a62gFpJlRoQ9jlouBC7C3AM08KYPzGhd+AtuDxtVEQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KbKWkVDRUoBr7rIV5OXEI3gG8tvStlz9YOOZM3jforkvQp2E+dTQfYJdgjGqV0D315KcK2pwDaV8ZdqbUUk689w0K+KHYKnDnvm+edNlheilX4UX/LDL2AzrKI4XtSq/OR8oMiCPy14naftN0IcswhvRrO3mz/PhvTBCbhbO/qA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 199BD106F; Fri, 19 Dec 2025 10:13:26 -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 6FB583F5CA; Fri, 19 Dec 2025 10:13:28 -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 Subject: [PATCH v2 19/45] arm_mpam: resctrl: Add resctrl_arch_get_config() Date: Fri, 19 Dec 2025 18:11:21 +0000 Message-ID: <20251219181147.3404071-20-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251219181147.3404071-1-ben.horgan@arm.com> References: <20251219181147.3404071-1-ben.horgan@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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. Signed-off-by: James Morse Signed-off-by: Ben Horgan Reviewed-by: Jonathan Cameron --- 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 d32e87002457..607e5f41f9e7 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -167,6 +167,49 @@ static int mpam_resctrl_pick_domain_id(int cpu, struct= mpam_component *comp) return comp->comp_id; } =20 +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 =3D container_of(r, struct mpam_resctrl_res, resctrl_res); + dom =3D container_of(d, struct mpam_resctrl_dom, resctrl_ctrl_dom); + cprops =3D &res->class->props; + + partid =3D resctrl_get_config_index(closid, type); + cfg =3D &dom->ctrl_comp->cfg[partid]; + + switch (r->rid) { + case RDT_RESOURCE_L2: + case RDT_RESOURCE_L3: + configured_by =3D mpam_feat_cpor_part; + break; + default: + return resctrl_get_default_ctrl(r); + } + + if (!r->alloc_capable || partid >=3D 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; --=20 2.43.0