From patchwork Mon Apr 13 06:11:23 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 6206221 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 008DA9F1AC for ; Mon, 13 Apr 2015 06:24:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1A9D02026C for ; Mon, 13 Apr 2015 06:24:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 18EF3201B9 for ; Mon, 13 Apr 2015 06:24:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752174AbbDMGKC (ORCPT ); Mon, 13 Apr 2015 02:10:02 -0400 Received: from mga02.intel.com ([134.134.136.20]:49312 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751498AbbDMGKB (ORCPT ); Mon, 13 Apr 2015 02:10:01 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP; 12 Apr 2015 23:10:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,568,1422950400"; d="scan'208";a="694313904" Received: from gerry-dev.bj.intel.com ([10.238.158.72]) by fmsmga001.fm.intel.com with ESMTP; 12 Apr 2015 23:09:55 -0700 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 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 Part1 v8 01/37] x86/irq: Save destination CPU ID in irq_cfg Date: Mon, 13 Apr 2015 14:11:23 +0800 Message-Id: <1428905519-23704-2-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1428905519-23704-1-git-send-email-jiang.liu@linux.intel.com> References: <1428905519-23704-1-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 Cache destination CPU APIC ID into struct irq_cfg when assigning vector for interrupt. Upper layer just needs to read the cached APIC ID instead of calling apic->cpu_mask_to_apicid_and(), it helps to hide APIC driver details from IOAPIC/HPET/MSI drivers.. 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 Link: http://lkml.kernel.org/r/1416894816-23245-2-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- arch/x86/include/asm/hw_irq.h | 1 + arch/x86/kernel/apic/vector.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h index 9662290e0b20..b988ddf7434b 100644 --- a/arch/x86/include/asm/hw_irq.h +++ b/arch/x86/include/asm/hw_irq.h @@ -116,6 +116,7 @@ struct irq_data; struct irq_cfg { cpumask_var_t domain; cpumask_var_t old_domain; + unsigned int dest_apicid; u8 vector; u8 move_in_progress : 1; #ifdef CONFIG_IRQ_REMAP diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 6cedd7914581..c724ef6b218c 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -188,6 +188,12 @@ next: } free_cpumask_var(tmp_mask); + if (!err) { + /* cache destination APIC IDs into cfg->dest_apicid */ + err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, + &cfg->dest_apicid); + } + return err; }