From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755184AbbAGH3j (ORCPT ); Wed, 7 Jan 2015 02:29:39 -0500 Received: from mga09.intel.com ([134.134.136.24]:14996 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754903AbbAGH3g (ORCPT ); Wed, 7 Jan 2015 02:29:36 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,713,1413270000"; d="scan'208";a="665633785" From: Jiang Liu To: Thomas Gleixner , Joerg Roedel , Benjamin Herrenschmidt , Ingo Molnar , "H. Peter Anvin" , Yinghai Lu , Borislav Petkov Cc: Jiang Liu , Tony Luck , x86@kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Joerg Roedel Subject: [Patch v2 08/16] iommu/vt-d: Prepare for killing function irq_remapping_supported() Date: Wed, 7 Jan 2015 15:31:35 +0800 Message-Id: <1420615903-28253-9-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1420615903-28253-1-git-send-email-jiang.liu@linux.intel.com> References: <1420615903-28253-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Prepare for killing function irq_remapping_supported() by moving code from intel_irq_remapping_supported() into intel_prepare_irq_remapping(). Combined with patch from Joerg at https://lkml.org/lkml/2014/12/15/487, so assume an signed-off from Joerg. Signed-off-by: Jiang Liu Signed-off-by: Joerg Roedel --- drivers/iommu/intel_irq_remapping.c | 58 +++++++++++++++-------------------- 1 file changed, 25 insertions(+), 33 deletions(-) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 1e7e09327753..8ccc7aa7e43a 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -568,30 +568,6 @@ static int __init dmar_x2apic_optout(void) static int __init intel_irq_remapping_supported(void) { - struct dmar_drhd_unit *drhd; - struct intel_iommu *iommu; - - if (disable_irq_remap) - return 0; - if (irq_remap_broken) { - printk(KERN_WARNING - "This system BIOS has enabled interrupt remapping\n" - "on a chipset that contains an erratum making that\n" - "feature unstable. To maintain system stability\n" - "interrupt remapping is being disabled. Please\n" - "contact your BIOS vendor for an update\n"); - add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); - disable_irq_remap = 1; - return 0; - } - - if (!dmar_ir_support()) - return 0; - - for_each_iommu(iommu, drhd) - if (!ecap_ir_support(iommu->ecap)) - return 0; - return 1; } @@ -616,26 +592,42 @@ static int __init intel_prepare_irq_remapping(void) struct dmar_drhd_unit *drhd; struct intel_iommu *iommu; + /* First check whether IRQ remapping should be enabled */ + if (disable_irq_remap) + return -ENODEV; + + if (irq_remap_broken) { + printk(KERN_WARNING + "This system BIOS has enabled interrupt remapping\n" + "on a chipset that contains an erratum making that\n" + "feature unstable. To maintain system stability\n" + "interrupt remapping is being disabled. Please\n" + "contact your BIOS vendor for an update\n"); + add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); + disable_irq_remap = 1; + return -ENODEV; + } + if (dmar_table_init() < 0) - return -1; + return -ENODEV; + + if (!dmar_ir_support()) + return -ENODEV; if (parse_ioapics_under_ir() != 1) { printk(KERN_INFO "Not enabling interrupt remapping\n"); goto error; } - for_each_iommu(iommu, drhd) { - if (!ecap_ir_support(iommu->ecap)) - continue; - - /* Do the allocations early */ - if (intel_setup_irq_remapping(iommu)) + for_each_iommu(iommu, drhd) + if (!ecap_ir_support(iommu->ecap) || + intel_setup_irq_remapping(iommu)) goto error; - } return 0; + error: intel_cleanup_irq_remapping(); - return -1; + return -ENODEV; } static int __init intel_enable_irq_remapping(void) -- 1.7.10.4