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 X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD817C388F7 for ; Thu, 29 Oct 2020 01:05:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A4582071A for ; Thu, 29 Oct 2020 01:05:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731071AbgJ2BFN (ORCPT ); Wed, 28 Oct 2020 21:05:13 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:6982 "EHLO szxga06-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730036AbgJ1WFo (ORCPT ); Wed, 28 Oct 2020 18:05:44 -0400 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4CLp3x39q2zhbW6; Wed, 28 Oct 2020 20:37:01 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.487.0; Wed, 28 Oct 2020 20:36:47 +0800 From: John Garry To: , , , , CC: , , , , John Garry Subject: [PATCH v2 1/3] genirq/affinity: Add irq_update_affinity_desc() Date: Wed, 28 Oct 2020 20:33:05 +0800 Message-ID: <1603888387-52499-2-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1603888387-52499-1-git-send-email-john.garry@huawei.com> References: <1603888387-52499-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a function to allow the affinity of an interrupt be switched to managed, such that interrupts allocated for platform devices may be managed. Suggested-by: Thomas Gleixner Signed-off-by: John Garry --- include/linux/interrupt.h | 8 ++++++++ kernel/irq/manage.c | 19 +++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index ee8299eb1f52..870b3251e174 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -352,6 +352,8 @@ extern int irq_can_set_affinity(unsigned int irq); extern int irq_select_affinity(unsigned int irq); extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m); +extern int irq_update_affinity_desc(unsigned int irq, + struct irq_affinity_desc *affinity); extern int irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify); @@ -387,6 +389,12 @@ static inline int irq_set_affinity_hint(unsigned int irq, return -EINVAL; } +static inline int irq_update_affinity_desc(unsigned int irq, + struct irq_affinity_desc *affinity) +{ + return -EINVAL; +} + static inline int irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify) { diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index c460e0496006..b96af4cde4bc 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -371,6 +371,25 @@ int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask, return ret; } +int irq_update_affinity_desc(unsigned int irq, + struct irq_affinity_desc *affinity) +{ + unsigned long flags; + struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0); + + if (!desc) + return -EINVAL; + + if (affinity->is_managed) { + irqd_set(&desc->irq_data, IRQD_AFFINITY_MANAGED); + irqd_set(&desc->irq_data, IRQD_MANAGED_SHUTDOWN); + } + + cpumask_copy(desc->irq_common_data.affinity, &affinity->mask); + irq_put_desc_unlock(desc, flags); + return 0; +} + int __irq_set_affinity(unsigned int irq, const struct cpumask *mask, bool force) { struct irq_desc *desc = irq_to_desc(irq); -- 2.26.2