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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by aws-us-west-2-korg-lkml-1.web.codeaurora.org (Postfix) with ESMTP id 83BFAC5CFF1 for ; Wed, 13 Jun 2018 01:06:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 41C7020660 for ; Wed, 13 Jun 2018 01:06:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 41C7020660 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.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 S935341AbeFMBGB (ORCPT ); Tue, 12 Jun 2018 21:06:01 -0400 Received: from mga14.intel.com ([192.55.52.115]:64691 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754446AbeFMBBe (ORCPT ); Tue, 12 Jun 2018 21:01:34 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Jun 2018 18:01:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,216,1526367600"; d="scan'208";a="47283467" Received: from voyager.sc.intel.com ([10.3.52.149]) by fmsmga008.fm.intel.com with ESMTP; 12 Jun 2018 18:01:31 -0700 From: Ricardo Neri To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" Cc: Andi Kleen , Ashok Raj , Borislav Petkov , Tony Luck , "Ravi V. Shankar" , x86@kernel.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Ricardo Neri , Jacob Pan , Dou Liyang , Juergen Gross , iommu@lists.linux-foundation.org Subject: [RFC PATCH 05/23] x86/msi: Add support for IRQCHIP_CAN_DELIVER_AS_NMI Date: Tue, 12 Jun 2018 17:57:25 -0700 Message-Id: <1528851463-21140-6-git-send-email-ricardo.neri-calderon@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1528851463-21140-1-git-send-email-ricardo.neri-calderon@linux.intel.com> References: <1528851463-21140-1-git-send-email-ricardo.neri-calderon@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org As per the Intel 64 and IA-32 Architectures Software Developer's Manual Volume 3 Section 10.11.2, the delivery mode field of the interrupt message can be set to configure as non-maskable. Declare support to deliver non- maskable interrupts by adding IRQCHIP_CAN_DELIVER_AS_NMI. When composing the interrupt message, the delivery mode is obtained from the configuration of the interrupt data. Cc: Ashok Raj Cc: Andi Kleen Cc: Tony Luck Cc: Borislav Petkov Cc: Jacob Pan Cc: Dou Liyang Cc: Juergen Gross Cc: "Ravi V. Shankar" Cc: x86@kernel.org Cc: iommu@lists.linux-foundation.org Signed-off-by: Ricardo Neri --- arch/x86/kernel/apic/msi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c index 12202ac..68b6a04 100644 --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -29,6 +29,9 @@ static void irq_msi_compose_msg(struct irq_data *data, struct msi_msg *msg) { struct irq_cfg *cfg = irqd_cfg(data); + if (irqd_deliver_as_nmi(data)) + cfg->delivery_mode = dest_NMI; + msg->address_hi = MSI_ADDR_BASE_HI; if (x2apic_enabled()) @@ -297,7 +300,7 @@ static struct irq_chip hpet_msi_controller __ro_after_init = { .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_compose_msi_msg = irq_msi_compose_msg, .irq_write_msi_msg = hpet_msi_write_msg, - .flags = IRQCHIP_SKIP_SET_WAKE, + .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_CAN_DELIVER_AS_NMI, }; static irq_hw_number_t hpet_msi_get_hwirq(struct msi_domain_info *info, -- 2.7.4