From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com ([192.55.52.88]:29012 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751176AbaKYFvE (ORCPT ); Tue, 25 Nov 2014 00:51:04 -0500 From: Jiang Liu To: Bjorn Helgaas , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Randy Dunlap , Yinghai Lu , Borislav Petkov , x86@kernel.org, Jiang Liu Cc: Konrad Rzeszutek Wilk , 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 v6 01/27] x86, irq: Save destination CPU ID in irq_cfg Date: Tue, 25 Nov 2014 13:53:10 +0800 Message-Id: <1416894816-23245-2-git-send-email-jiang.liu@linux.intel.com> In-Reply-To: <1416894816-23245-1-git-send-email-jiang.liu@linux.intel.com> References: <1416894816-23245-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-pci-owner@vger.kernel.org List-ID: 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 --- 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; } -- 1.7.10.4