Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933074AbbBBIPT (ORCPT ); Mon, 2 Feb 2015 03:15:19 -0500 Received: from mga09.intel.com ([134.134.136.24]:3197 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932551AbbBBIOM (ORCPT ); Mon, 2 Feb 2015 03:14:12 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,505,1418112000"; d="scan'208";a="660196996" From: Feng Wu To: dwmw2@infradead.org, joro@8bytes.or Cc: jiang.liu@linux.intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Feng Wu Subject: [v4 6/8] iommu, x86: Setup Posted-Interrupts capability for Intel iommu Date: Mon, 2 Feb 2015 16:01:52 +0800 Message-Id: <1422864114-19324-7-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1422864114-19324-1-git-send-email-feng.wu@intel.com> References: <1422864114-19324-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3133 Lines: 111 Set Posted-Interrupts capability for Intel iommu when IR is enabled, clear it when IR is disabled. Signed-off-by: Feng Wu --- drivers/iommu/intel_irq_remapping.c | 34 ++++++++++++++++++++++++++++++++++ drivers/iommu/irq_remapping.c | 2 ++ drivers/iommu/irq_remapping.h | 3 +++ 3 files changed, 39 insertions(+), 0 deletions(-) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index ab9057a..130a92b 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -635,6 +635,20 @@ static int __init intel_enable_irq_remapping(void) irq_remapping_enabled = 1; + /* + * Set Posted-Interrupts capability. + */ + if (!disable_irq_post) { + intel_irq_remap_ops.capability |= 1 << IRQ_POSTING_CAP; + + for_each_iommu(iommu, drhd) + if (!cap_pi_support(iommu->cap)) { + intel_irq_remap_ops.capability &= + ~(1 << IRQ_POSTING_CAP); + break; + } + } + pr_info("Enabled IRQ remapping in %s mode\n", eim ? "x2apic" : "xapic"); return eim ? IRQ_REMAP_X2APIC_MODE : IRQ_REMAP_XAPIC_MODE; @@ -843,6 +857,12 @@ static void disable_irq_remapping(void) iommu_disable_irq_remapping(iommu); } + + /* + * Clear Posted-Interrupts capability. + */ + if (!disable_irq_post) + intel_irq_remap_ops.capability &= ~(1 << IRQ_POSTING_CAP); } static int reenable_irq_remapping(int eim) @@ -870,6 +890,20 @@ static int reenable_irq_remapping(int eim) if (!setup) goto error; + /* + * Set Posted-Interrupts capability. + */ + if (!disable_irq_post) { + intel_irq_remap_ops.capability |= 1 << IRQ_POSTING_CAP; + + for_each_iommu(iommu, drhd) + if (!cap_pi_support(iommu->cap)) { + intel_irq_remap_ops.capability &= + ~(1 << IRQ_POSTING_CAP); + break; + } + } + return 0; error: diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index 3c3da04..e63e969 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -24,6 +24,8 @@ int irq_remap_broken; int disable_sourceid_checking; int no_x2apic_optout; +int disable_irq_post = 1; + static struct irq_remap_ops *remap_ops; static void irq_remapping_disable_io_apic(void) diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h index 69b2a1c..fe6ef36 100644 --- a/drivers/iommu/irq_remapping.h +++ b/drivers/iommu/irq_remapping.h @@ -35,6 +35,8 @@ extern int disable_sourceid_checking; extern int no_x2apic_optout; extern int irq_remapping_enabled; +extern int disable_irq_post; + struct irq_remap_ops { /* The supported capabilites */ int capability; @@ -74,6 +76,7 @@ extern void ir_ack_apic_edge(struct irq_data *data); #define irq_remapping_enabled 0 #define disable_irq_remap 1 #define irq_remap_broken 0 +#define disable_irq_post 1 #endif /* CONFIG_IRQ_REMAP */ -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/