From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755592AbbFLJvQ (ORCPT ); Fri, 12 Jun 2015 05:51:16 -0400 Received: from terminus.zytor.com ([198.137.202.10]:34815 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754787AbbFLJvN (ORCPT ); Fri, 12 Jun 2015 05:51:13 -0400 Date: Fri, 12 Jun 2015 02:51:00 -0700 From: tip-bot for Feng Wu Message-ID: Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, hpa@zytor.com, feng.wu@intel.com, jiang.liu@linux.intel.com, joro@8bytes.org, tglx@linutronix.de Reply-To: linux-kernel@vger.kernel.org, mingo@kernel.org, hpa@zytor.com, feng.wu@intel.com, jiang.liu@linux.intel.com, joro@8bytes.org, tglx@linutronix.de In-Reply-To: <1433827237-3382-10-git-send-email-feng.wu@intel.com> References: <1433827237-3382-10-git-send-email-feng.wu@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/apic] iommu, x86: Provide irq_remapping_cap() interface Git-Commit-ID: 959c870f7305be019d9316bc4e038dc6119d51ad X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 959c870f7305be019d9316bc4e038dc6119d51ad Gitweb: http://git.kernel.org/tip/959c870f7305be019d9316bc4e038dc6119d51ad Author: Feng Wu AuthorDate: Tue, 9 Jun 2015 13:20:36 +0800 Committer: Thomas Gleixner CommitDate: Fri, 12 Jun 2015 11:33:52 +0200 iommu, x86: Provide irq_remapping_cap() interface Add a new interface irq_remapping_cap() to detect whether irq remapping supports new features, such as VT-d Posted-Interrupts. Export the function, so that KVM code can check this and use this mechanism properly. Signed-off-by: Feng Wu Reviewed-by: Jiang Liu Reviewed-by: Thomas Gleixner Acked-by: Joerg Roedel Cc: iommu@lists.linux-foundation.org Cc: dwmw2@infradead.org Link: http://lkml.kernel.org/r/1433827237-3382-10-git-send-email-feng.wu@intel.com Signed-off-by: Thomas Gleixner --- arch/x86/include/asm/irq_remapping.h | 2 ++ drivers/iommu/irq_remapping.c | 9 +++++++++ 2 files changed, 11 insertions(+) diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h index e479fbd..046c7fb 100644 --- a/arch/x86/include/asm/irq_remapping.h +++ b/arch/x86/include/asm/irq_remapping.h @@ -35,6 +35,7 @@ enum irq_remap_cap { #ifdef CONFIG_IRQ_REMAP +extern bool irq_remapping_cap(enum irq_remap_cap cap); extern void set_irq_remapping_broken(void); extern int irq_remapping_prepare(void); extern int irq_remapping_enable(void); @@ -64,6 +65,7 @@ struct vcpu_data { #else /* CONFIG_IRQ_REMAP */ +static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; } static inline void set_irq_remapping_broken(void) { } static inline int irq_remapping_prepare(void) { return -ENODEV; } static inline int irq_remapping_enable(void) { return -ENODEV; } diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index ed605a9..2d99930 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -81,6 +81,15 @@ void set_irq_remapping_broken(void) irq_remap_broken = 1; } +bool irq_remapping_cap(enum irq_remap_cap cap) +{ + if (!remap_ops || disable_irq_post) + return 0; + + return (remap_ops->capability & (1 << cap)); +} +EXPORT_SYMBOL_GPL(irq_remapping_cap); + int __init irq_remapping_prepare(void) { if (disable_irq_remap)