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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,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 2B6DDC433F5 for ; Tue, 28 Aug 2018 15:30:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DBCE520867 for ; Tue, 28 Aug 2018 15:30:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DBCE520867 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727254AbeH1TWJ (ORCPT ); Tue, 28 Aug 2018 15:22:09 -0400 Received: from foss.arm.com ([217.140.101.70]:40460 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726961AbeH1TWJ (ORCPT ); Tue, 28 Aug 2018 15:22:09 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9767718A; Tue, 28 Aug 2018 08:29:58 -0700 (PDT) Received: from e112298-lin.Emea.Arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 650233F557; Tue, 28 Aug 2018 08:29:57 -0700 (PDT) From: Julien Thierry To: linux-kernel@vger.kernel.org Cc: tglx@linutronix.de, peterz@infradead.org, marc.zyngier@arm.com, mingo@kernel.org, Julien Thierry Subject: [PATCH v2 0/4] Provide core API for NMIs Date: Tue, 28 Aug 2018 16:29:44 +0100 Message-Id: <1535470188-38155-1-git-send-email-julien.thierry@arm.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This patch series provides a way for irqchips to define some IRQs as NMIs. For this to be possible, the irqchip must: - be a root irqchip - not require bus locking - have the NMI support flag Once these conditions are met, interrupt lines can be requested as NMIs. These lines must not be shared and the IRQ handling must not be threaded. Callbacks are added to the irqchip in order to set up (clean up) the necessary resources for NMIs before enabling (before releasing) the corresponding interrupt line. I'll soon post a series making use of the API for Arm's GICv3. Patches 1 & 2 provide functions necessary to request and manage NMIs. Patches 3 & 4 provide functions for NMI handling. Changes since v1[1]: - Rebased to v4.19-rc1 - Fix some coding style issues Changes since RFC[2]: - Rebased to v4.18-rc6 - Remove disable_nmi, one should call disable_nmi_nosync instead - Remove code related to affinity balancing from NMI functions - Require PERCPU configuration for NMIs [1] https://lkml.org/lkml/2018/7/24/321 [2] https://lkml.org/lkml/2018/7/9/768 Cheers, Julien --> Julien Thierry (4): genirq: Provide basic NMI management for interrupt lines genirq: Provide NMI management for percpu_devid interrupts genirq: Provide NMI handlers irqdesc: Add domain handler for NMIs include/linux/interrupt.h | 18 +++ include/linux/irq.h | 10 ++ include/linux/irqdesc.h | 3 + kernel/irq/chip.c | 54 +++++++ kernel/irq/debugfs.c | 6 +- kernel/irq/internals.h | 2 + kernel/irq/irqdesc.c | 33 ++++ kernel/irq/manage.c | 377 +++++++++++++++++++++++++++++++++++++++++++++- 8 files changed, 500 insertions(+), 3 deletions(-) -- 1.9.1