From nobody Mon Feb 9 19:38:00 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2710D29A312 for ; Mon, 12 Jan 2026 17:01:12 +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=1768237274; cv=none; b=s83B2cOdnOq+wLJ66lDWfhb/LrdYZDpDHNglKtGVSSBs+6Hq/CJmsnN3c4qVlYHnERxTjO7nt7M3/FB3/8SOjiFXzZJOJwfyNmzZEVwkS6w1WAZ3nsS/aHPYw+8B2SNyoSj+VQnVbCifvmNRmmJ/v78DmgXp/kb9Pg9J2/yzpSY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768237274; c=relaxed/simple; bh=XgDK89hqWEfO/2PoYrBcNNldKaN3xMud0defVYyMoZk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FKLquv46sgyc+TkMBB2ZwGQx9jBvbwneQH55sQ/2zJLtm6qa41g95j9YrjdcB1BYaFine2r4Lbd3UNFl7y39GIOXdQZ87XI55LRcu7wYWi47W8Zf4OCSXbMaej2nXQ4vUk0fxUr6b9uUCNnxPRQxn7ExZvM5ylvAuMv22LE1I6w= 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 D605F1596; Mon, 12 Jan 2026 09:01:05 -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 7811A3F694; Mon, 12 Jan 2026 09:01:07 -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 v3 15/47] arm_mpam: resctrl: Sort the order of the domain lists Date: Mon, 12 Jan 2026 16:58:42 +0000 Message-ID: <20260112165914.4086692-16-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260112165914.4086692-1-ben.horgan@arm.com> References: <20260112165914.4086692-1-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 resctrl documents that the domains appear in numeric order in the schemata file. This means a little more work is needed when bringing a domain online. Add the support for this, using resctrl_find_domain() to find the point to insert in the list. Reviewed-by: Jonathan Cameron Signed-off-by: James Morse Signed-off-by: Ben Horgan --- drivers/resctrl/mpam_resctrl.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/resctrl/mpam_resctrl.c b/drivers/resctrl/mpam_resctrl.c index cb29c05edfa8..4dba6f58f79c 100644 --- a/drivers/resctrl/mpam_resctrl.c +++ b/drivers/resctrl/mpam_resctrl.c @@ -119,6 +119,21 @@ static bool mpam_resctrl_offline_domain_hdr(unsigned i= nt cpu, return false; } =20 +static void mpam_resctrl_domain_insert(struct list_head *list, + struct rdt_domain_hdr *new) +{ + struct rdt_domain_hdr *err; + struct list_head *pos =3D NULL; + + lockdep_assert_held(&domain_list_lock); + + err =3D resctrl_find_domain(list, new->id, &pos); + if (WARN_ON_ONCE(err)) + return; + + list_add_tail_rcu(&new->list, pos); +} + static struct mpam_resctrl_dom * mpam_resctrl_alloc_domain(unsigned int cpu, struct mpam_resctrl_res *res) { @@ -156,8 +171,7 @@ mpam_resctrl_alloc_domain(unsigned int cpu, struct mpam= _resctrl_res *res) ctrl_d =3D &dom->resctrl_ctrl_dom; mpam_resctrl_domain_hdr_init(cpu, ctrl_comp, &ctrl_d->hdr); ctrl_d->hdr.type =3D RESCTRL_CTRL_DOMAIN; - /* TODO: this list should be sorted */ - list_add_tail_rcu(&ctrl_d->hdr.list, &r->ctrl_domains); + mpam_resctrl_domain_insert(&r->ctrl_domains, &ctrl_d->hdr); err =3D resctrl_online_ctrl_domain(r, ctrl_d); if (err) { dom =3D ERR_PTR(err); @@ -171,8 +185,7 @@ mpam_resctrl_alloc_domain(unsigned int cpu, struct mpam= _resctrl_res *res) mon_d =3D &dom->resctrl_mon_dom; mpam_resctrl_domain_hdr_init(cpu, ctrl_comp, &mon_d->hdr); mon_d->hdr.type =3D RESCTRL_MON_DOMAIN; - /* TODO: this list should be sorted */ - list_add_tail_rcu(&mon_d->hdr.list, &r->mon_domains); + mpam_resctrl_domain_insert(&r->mon_domains, &mon_d->hdr); err =3D resctrl_online_mon_domain(r, mon_d); if (err) { dom =3D ERR_PTR(err); --=20 2.43.0