From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e36.co.us.ibm.com ([32.97.110.154]:57609 "EHLO e36.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751840AbcFBGOe (ORCPT ); Thu, 2 Jun 2016 02:14:34 -0400 Received: from localhost by e36.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 2 Jun 2016 00:14:33 -0600 From: Yongji Xie To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org Cc: alex.williamson@redhat.com, bhelgaas@google.com, aik@ozlabs.ru, benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, joro@8bytes.org, warrier@linux.vnet.ibm.com, zhong@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com, eric.auger@linaro.org, will.deacon@arm.com, gwshan@linux.vnet.ibm.com, alistair@popple.id.au, ruscur@russell.cc, kevin.tian@intel.com, David.Laight@ACULAB.COM Subject: [RESEND PATCH v2 4/6] iommu: Set PCI_BUS_FLAGS_MSI_REMAP on iommu driver initialization Date: Thu, 2 Jun 2016 14:10:01 +0800 Message-Id: <1464847803-22756-5-git-send-email-xyjxie@linux.vnet.ibm.com> In-Reply-To: <1464847803-22756-1-git-send-email-xyjxie@linux.vnet.ibm.com> References: <1464847803-22756-1-git-send-email-xyjxie@linux.vnet.ibm.com> Sender: linux-pci-owner@vger.kernel.org List-ID: Some iommu drivers would be initialized after PCI device enumeration. So PCI_BUS_FLAGS_MSI_REMAP would not be set when probing PCI devices although IOMMU enables capability of IRQ remapping. This patch tests this capability and set the flag when iommu driver is initialized. Signed-off-by: Yongji Xie --- drivers/iommu/iommu.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index b9df141..e6159ab 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -872,6 +872,14 @@ static int add_iommu_group(struct device *dev, void *data) const struct iommu_ops *ops = cb->ops; int ret; + /* + * Set PCI_BUS_FLAGS_MSI_REMAP for all PCI buses when IOMMU + * have capability of IRQ remapping. + */ + if (dev_is_pci(dev) && ops->capable && + ops->capable(IOMMU_CAP_INTR_REMAP)) + to_pci_dev(dev)->bus->bus_flags |= PCI_BUS_FLAGS_MSI_REMAP; + if (!ops->add_device) return 0; -- 1.7.9.5