From patchwork Tue Jan 20 05:51:47 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 5664841 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 518F9C058D for ; Tue, 20 Jan 2015 05:58:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 03B1C200FF for ; Tue, 20 Jan 2015 05:57:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2CE3C20222 for ; Tue, 20 Jan 2015 05:57:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752519AbbATFzN (ORCPT ); Tue, 20 Jan 2015 00:55:13 -0500 Received: from mga11.intel.com ([192.55.52.93]:28706 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752212AbbATFzK (ORCPT ); Tue, 20 Jan 2015 00:55:10 -0500 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 19 Jan 2015 21:55:09 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,432,1418112000"; d="scan'208";a="664448319" Received: from gerry-dev.bj.intel.com ([10.238.158.52]) by fmsmga002.fm.intel.com with ESMTP; 19 Jan 2015 21:55:04 -0800 From: Jiang Liu To: Bjorn Helgaas , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Randy Dunlap , Yinghai Lu , Borislav Petkov , Dimitri Sivanich , x86@kernel.org, Jiang Liu , Jan Beulich Cc: Konrad Rzeszutek Wilk , David Cohen , Sander Eikelenboom , David Vrabel , Andrew Morton , Tony Luck , Joerg Roedel , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [Patch Part2 v4 27/33] x86/irq: Refine the way to calculate NR_IRQS Date: Tue, 20 Jan 2015 13:51:47 +0800 Message-Id: <1421733113-15704-28-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1421733113-15704-1-git-send-email-jiang.liu@linux.intel.com> References: <1421733113-15704-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Now we have made MSI independent of IOAPIC, so we need to refine the way to calculate NR_IRQS to support configuration with MSI enabled but IOAPIC disabled. Signed-off-by: Jiang Liu Cc: Konrad Rzeszutek Wilk Cc: Tony Luck Cc: Joerg Roedel Cc: Greg Kroah-Hartman Cc: Bjorn Helgaas Cc: Benjamin Herrenschmidt Cc: Rafael J. Wysocki Cc: Randy Dunlap Cc: Yinghai Lu Cc: Borislav Petkov Cc: Jan Beulich Link: http://lkml.kernel.org/r/1416901802-24211-36-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner Tested-by: Joerg Roedel --- arch/x86/include/asm/irq_vectors.h | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h index 666c89ec4bd7..b26cb124a4f1 100644 --- a/arch/x86/include/asm/irq_vectors.h +++ b/arch/x86/include/asm/irq_vectors.h @@ -155,18 +155,22 @@ static inline int invalid_vm86_irq(int irq) * static arrays. */ -#define NR_IRQS_LEGACY 16 +#define NR_IRQS_LEGACY 16 -#define IO_APIC_VECTOR_LIMIT ( 32 * MAX_IO_APICS ) +#define CPU_VECTOR_LIMIT (64 * NR_CPUS) +#define IO_APIC_VECTOR_LIMIT (32 * MAX_IO_APICS) -#ifdef CONFIG_X86_IO_APIC -# define CPU_VECTOR_LIMIT (64 * NR_CPUS) -# define NR_IRQS \ +#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_PCI_MSI) +#define NR_IRQS \ (CPU_VECTOR_LIMIT > IO_APIC_VECTOR_LIMIT ? \ (NR_VECTORS + CPU_VECTOR_LIMIT) : \ (NR_VECTORS + IO_APIC_VECTOR_LIMIT)) -#else /* !CONFIG_X86_IO_APIC: */ -# define NR_IRQS NR_IRQS_LEGACY +#elif defined(CONFIG_X86_IO_APIC) +#define NR_IRQS (NR_VECTORS + IO_APIC_VECTOR_LIMIT) +#elif defined(CONFIG_PCI_MSI) +#define NR_IRQS (NR_VECTORS + CPU_VECTOR_LIMIT) +#else +#define NR_IRQS NR_IRQS_LEGACY #endif #endif /* _ASM_X86_IRQ_VECTORS_H */