From patchwork Thu Mar 10 17:10:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Fancellu X-Patchwork-Id: 12776766 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 659D6C433F5 for ; Thu, 10 Mar 2022 17:10:50 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.288505.489236 (Exim 4.92) (envelope-from ) id 1nSMJ9-00020C-1x; Thu, 10 Mar 2022 17:10:35 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 288505.489236; Thu, 10 Mar 2022 17:10:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nSMJ8-0001xI-So; Thu, 10 Mar 2022 17:10:34 +0000 Received: by outflank-mailman (input) for mailman id 288505; Thu, 10 Mar 2022 17:10:33 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nSMJ7-0001lh-Ik for xen-devel@lists.xenproject.org; Thu, 10 Mar 2022 17:10:33 +0000 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by se1-gles-sth1.inumbo.com (Halon) with ESMTP id fe0d42a9-a094-11ec-8eba-a37418f5ba1a; Thu, 10 Mar 2022 18:10:32 +0100 (CET) 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 7B84116F2; Thu, 10 Mar 2022 09:10:31 -0800 (PST) Received: from e125770.cambridge.arm.com (e125770.cambridge.arm.com [10.1.195.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 301773F99C; Thu, 10 Mar 2022 09:10:30 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: fe0d42a9-a094-11ec-8eba-a37418f5ba1a From: Luca Fancellu To: xen-devel@lists.xenproject.org Cc: wei.chen@arm.com, Juergen Gross , Dario Faggioli , George Dunlap , Andrew Cooper , Jan Beulich , Julien Grall , Stefano Stabellini , Wei Liu Subject: [PATCH v2 2/6] xen/sched: create public function for cpupools creation Date: Thu, 10 Mar 2022 17:10:15 +0000 Message-Id: <20220310171019.6170-3-luca.fancellu@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220310171019.6170-1-luca.fancellu@arm.com> References: <20220310171019.6170-1-luca.fancellu@arm.com> Create new public function to create cpupools, can take as parameter the scheduler id or a negative value that means the default Xen scheduler will be used. Signed-off-by: Luca Fancellu Reviewed-by: Juergen Gross --- Changes in v2: - cpupool_create_pool doesn't check anymore for pool id uniqueness before calling cpupool_create. Modified commit message accordingly --- xen/common/sched/cpupool.c | 15 +++++++++++++++ xen/include/xen/sched.h | 16 ++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/xen/common/sched/cpupool.c b/xen/common/sched/cpupool.c index a6da4970506a..89a891af7076 100644 --- a/xen/common/sched/cpupool.c +++ b/xen/common/sched/cpupool.c @@ -1219,6 +1219,21 @@ static void cpupool_hypfs_init(void) #endif /* CONFIG_HYPFS */ +struct cpupool *__init cpupool_create_pool(unsigned int pool_id, int sched_id) +{ + struct cpupool *pool; + + if ( sched_id < 0 ) + sched_id = scheduler_get_default()->sched_id; + + pool = cpupool_create(pool_id, sched_id); + + BUG_ON(IS_ERR(pool)); + cpupool_put(pool); + + return pool; +} + static int __init cf_check cpupool_init(void) { unsigned int cpu; diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index 10ea969c7af9..47fc856e0fe0 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -1145,6 +1145,22 @@ int cpupool_move_domain(struct domain *d, struct cpupool *c); int cpupool_do_sysctl(struct xen_sysctl_cpupool_op *op); unsigned int cpupool_get_id(const struct domain *d); const cpumask_t *cpupool_valid_cpus(const struct cpupool *pool); + +/* + * cpupool_create_pool - Creates a cpupool + * @pool_id: id of the pool to be created + * @sched_id: id of the scheduler to be used for the pool + * + * Creates a cpupool with pool_id id. + * The sched_id parameter identifies the scheduler to be used, if it is + * negative, the default scheduler of Xen will be used. + * + * returns: + * pointer to the struct cpupool just created, on success + * NULL, on cpupool creation error + */ +struct cpupool *cpupool_create_pool(unsigned int pool_id, int sched_id); + extern void cf_check dump_runq(unsigned char key); void arch_do_physinfo(struct xen_sysctl_physinfo *pi);