From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754380AbbIROpD (ORCPT ); Fri, 18 Sep 2015 10:45:03 -0400 Received: from mga11.intel.com ([192.55.52.93]:32532 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754349AbbIROo7 (ORCPT ); Fri, 18 Sep 2015 10:44:59 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,553,1437462000"; d="scan'208";a="792548937" From: Feng Wu To: pbonzini@redhat.com, alex.williamson@redhat.com, joro@8bytes.org, mtosatti@redhat.com Cc: eric.auger@linaro.org, kvm@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Feng Wu Subject: [PATCH v9 18/18] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts Date: Fri, 18 Sep 2015 22:29:56 +0800 Message-Id: <1442586596-5920-19-git-send-email-feng.wu@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1442586596-5920-1-git-send-email-feng.wu@intel.com> References: <1442586596-5920-1-git-send-email-feng.wu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Enable VT-d Posted-Interrtups and add a command line parameter for it. Signed-off-by: Feng Wu Reviewed-by: Paolo Bonzini --- Documentation/kernel-parameters.txt | 1 + drivers/iommu/irq_remapping.c | 12 ++++++++---- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 1d6f045..52aca36 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1547,6 +1547,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. nosid disable Source ID checking no_x2apic_optout BIOS x2APIC opt-out request will be ignored + nopost disable Interrupt Posting iomem= Disable strict checking of access to MMIO memory strict regions from userspace. diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index 2d99930..d8c3997 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -22,7 +22,7 @@ int irq_remap_broken; int disable_sourceid_checking; int no_x2apic_optout; -int disable_irq_post = 1; +int disable_irq_post = 0; static int disable_irq_remap; static struct irq_remap_ops *remap_ops; @@ -58,14 +58,18 @@ static __init int setup_irqremap(char *str) return -EINVAL; while (*str) { - if (!strncmp(str, "on", 2)) + if (!strncmp(str, "on", 2)) { disable_irq_remap = 0; - else if (!strncmp(str, "off", 3)) + disable_irq_post = 0; + } else if (!strncmp(str, "off", 3)) { disable_irq_remap = 1; - else if (!strncmp(str, "nosid", 5)) + disable_irq_post = 1; + } else if (!strncmp(str, "nosid", 5)) disable_sourceid_checking = 1; else if (!strncmp(str, "no_x2apic_optout", 16)) no_x2apic_optout = 1; + else if (!strncmp(str, "nopost", 6)) + disable_irq_post = 1; str += strcspn(str, ","); while (*str == ',') -- 2.1.0