From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp08.au.ibm.com (e23smtp08.au.ibm.com [202.81.31.141]) (using TLSv1.2 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3qpQD93R8KzDqQK for ; Mon, 18 Apr 2016 21:00:41 +1000 (AEST) Received: from localhost by e23smtp08.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 18 Apr 2016 21:00:40 +1000 Received: from d23relay10.au.ibm.com (d23relay10.au.ibm.com [9.190.26.77]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id DF82D2CE8054 for ; Mon, 18 Apr 2016 21:00:36 +1000 (EST) Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay10.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u3IB0SvS63832124 for ; Mon, 18 Apr 2016 21:00:36 +1000 Received: from d23av02.au.ibm.com (localhost [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u3IB03G3007580 for ; Mon, 18 Apr 2016 21:00:04 +1000 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, linux-doc@vger.kernel.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, Yongji Xie Subject: [RFC v6 07/10] iommu: Set PCI_BUS_FLAGS_MSI_REMAP if IOMMU have capability of IRQ remapping Date: Mon, 18 Apr 2016 18:58:37 +0800 Message-Id: <1460977120-29367-2-git-send-email-xyjxie@linux.vnet.ibm.com> In-Reply-To: <1460977120-29367-1-git-send-email-xyjxie@linux.vnet.ibm.com> References: <1460977120-29367-1-git-send-email-xyjxie@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The capability of IRQ remapping is abstracted on IOMMU side on some archs. There is a existing flag IOMMU_CAP_INTR_REMAP for this. To have a universal flag to test this capability for different archs on PCI side, we set PCI_BUS_FLAGS_MSI_REMAP for PCI buses when IOMMU_CAP_INTR_REMAP is set. Signed-off-by: Yongji Xie --- drivers/iommu/iommu.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 0e3b009..5d2b6f6 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -813,6 +813,16 @@ struct iommu_group *pci_device_group(struct device *dev) return group; } +static void pci_check_msi_remapping(struct pci_dev *pdev, + const struct iommu_ops *ops) +{ + struct pci_bus *bus = pdev->bus; + + if (ops->capable(IOMMU_CAP_INTR_REMAP) && + !(bus->bus_flags & PCI_BUS_FLAGS_MSI_REMAP)) + bus->bus_flags |= PCI_BUS_FLAGS_MSI_REMAP; +} + /** * iommu_group_get_for_dev - Find or create the IOMMU group for a device * @dev: target device @@ -871,6 +881,9 @@ static int add_iommu_group(struct device *dev, void *data) const struct iommu_ops *ops = cb->ops; int ret; + if (dev_is_pci(dev) && ops->capable) + pci_check_msi_remapping(to_pci_dev(dev), ops); + if (!ops->add_device) return 0; @@ -913,6 +926,8 @@ static int iommu_bus_notifier(struct notifier_block *nb, * result in ADD/DEL notifiers to group->notifier */ if (action == BUS_NOTIFY_ADD_DEVICE) { + if (dev_is_pci(dev) && ops->capable) + pci_check_msi_remapping(to_pci_dev(dev), ops); if (ops->add_device) return ops->add_device(dev); } else if (action == BUS_NOTIFY_REMOVED_DEVICE) { -- 1.7.9.5