From nobody Tue Dec 16 14:57:45 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D440F2D877B for ; Fri, 5 Dec 2025 22:00:09 +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=1764972011; cv=none; b=QIqF67SbENtbVTNHLN7c1wygSKa879flU4R9grkAP1OzuVNaHULBumFjH50WTrD9wqtJwN2dZFEyYWaKt3725JeBjdcgj+0oWpGqQWRvGTD484zVX+A1xLpVZJkRtAeiFLuDp5Yf3GxNShIYyuH9/lJ9T0FZV2dN0r3mQVBdXx8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764972011; c=relaxed/simple; bh=UsNcesTVx0cMdSBuTJgZ2Opg21Ul0rQDS5b6v2+lyyk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=YQM+swGHmY9ylfvwHneyQHqGI4iypGbwYavsWnIGkfzx7gwpDRW/KH4uPHC35d0KouiSxp6E2jBS5nJ4QzIziyBXSNH4hzIZmpg0mReKYOVMtR6kbP3XYxdJPABeGq7oJsECYq6c0y+swU+X9jsNDBfDCz35QznG0EGhGcDtUx0= 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 8110A1BB2; Fri, 5 Dec 2025 14:00:01 -0800 (PST) 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 0B99B3F740; Fri, 5 Dec 2025 14:00:04 -0800 (PST) From: James Morse To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.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 , Gavin Shan , Ben Horgan , rohit.mathew@arm.com, reinette.chatre@intel.com, Punit Agrawal Subject: [RFC PATCH 10/38] arm_mpam: resctrl: Add resctrl_arch_get_config() Date: Fri, 5 Dec 2025 21:58:33 +0000 Message-Id: <20251205215901.17772-11-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20251205215901.17772-1-james.morse@arm.com> References: <20251205215901.17772-1-james.morse@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" 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 --- 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 a2deea1f4818..a26eb1f3efd0 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; } =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 2.39.5