From 0a920356748df4fb06e86c21c23d2ed6d31d37ad Mon Sep 17 00:00:00 2001 From: Weidong Han Date: Tue, 2 Dec 2008 21:24:23 +0800 Subject: KVM: support device deassignment Support device deassignment, it can be used in device hotplug. Signed-off-by: Weidong Han Signed-off-by: Joerg Roedel --- virt/kvm/vtd.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'virt/kvm/vtd.c') diff --git a/virt/kvm/vtd.c b/virt/kvm/vtd.c index 44bb58a395a5..174ea1f8cee5 100644 --- a/virt/kvm/vtd.c +++ b/virt/kvm/vtd.c @@ -116,6 +116,30 @@ int kvm_assign_device(struct kvm *kvm, return 0; } +int kvm_deassign_device(struct kvm *kvm, + struct kvm_assigned_dev_kernel *assigned_dev) +{ + struct dmar_domain *domain = kvm->arch.intel_iommu_domain; + struct pci_dev *pdev = NULL; + + /* check if iommu exists and in use */ + if (!domain) + return 0; + + pdev = assigned_dev->dev; + if (pdev == NULL) + return -ENODEV; + + intel_iommu_detach_device(domain, pdev); + + printk(KERN_DEBUG "deassign device: host bdf = %x:%x:%x\n", + assigned_dev->host_busnr, + PCI_SLOT(assigned_dev->host_devfn), + PCI_FUNC(assigned_dev->host_devfn)); + + return 0; +} + int kvm_iommu_map_guest(struct kvm *kvm) { int r; -- cgit v1.2.3-59-g8ed1b