KVM: Move assigned device code to own file

Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 818 insertions, 0 deletions

diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
new file mode 100644
index 000000000000..fd9c097b760a
--- /dev/null
+++ b/virt/kvm/assigned-dev.c
@@ -0,0 +1,818 @@
+/*
+ * Kernel-based Virtual Machine - device assignment support
+ *
+ * Copyright (C) 2006-9 Red Hat, Inc
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/kvm.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include <linux/errno.h>
+#include <linux/spinlock.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include "irq.h"
+
+static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
+                                                      int assigned_dev_id)
+{
+        struct list_head *ptr;
+        struct kvm_assigned_dev_kernel *match;
+
+        list_for_each(ptr, head) {
+                match = list_entry(ptr, struct kvm_assigned_dev_kernel, list);
+                if (match->assigned_dev_id == assigned_dev_id)
+                        return match;
+        }
+        return NULL;
+}
+
+static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
+                                    *assigned_dev, int irq)
+{
+        int i, index;
+        struct msix_entry *host_msix_entries;
+
+        host_msix_entries = assigned_dev->host_msix_entries;
+
+        index = -1;
+        for (i = 0; i < assigned_dev->entries_nr; i++)
+                if (irq == host_msix_entries[i].vector) {
+                        index = i;
+                        break;
+                }
+        if (index < 0) {
+                printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n");
+                return 0;
+        }
+
+        return index;
+}
+
+static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work)
+{
+        struct kvm_assigned_dev_kernel *assigned_dev;
+        struct kvm *kvm;
+        int i;
+
+        assigned_dev = container_of(work, struct kvm_assigned_dev_kernel,
+                                    interrupt_work);
+        kvm = assigned_dev->kvm;
+
+        spin_lock_irq(&assigned_dev->assigned_dev_lock);
+        if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
+                struct kvm_guest_msix_entry *guest_entries =
+                        assigned_dev->guest_msix_entries;
+                for (i = 0; i < assigned_dev->entries_nr; i++) {
+                        if (!(guest_entries[i].flags &
+                                        KVM_ASSIGNED_MSIX_PENDING))
+                                continue;
+                        guest_entries[i].flags &= ~KVM_ASSIGNED_MSIX_PENDING;
+                        kvm_set_irq(assigned_dev->kvm,
+                                    assigned_dev->irq_source_id,
+                                    guest_entries[i].vector, 1);
+                }
+        } else
+                kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
+                            assigned_dev->guest_irq, 1);
+
+        spin_unlock_irq(&assigned_dev->assigned_dev_lock);
+}
+
+static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id)
+{
+        unsigned long flags;
+        struct kvm_assigned_dev_kernel *assigned_dev =
+                (struct kvm_assigned_dev_kernel *) dev_id;
+
+        spin_lock_irqsave(&assigned_dev->assigned_dev_lock, flags);
+        if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
+                int index = find_index_from_host_irq(assigned_dev, irq);
+                if (index < 0)
+                        goto out;
+                assigned_dev->guest_msix_entries[index].flags |=
+                        KVM_ASSIGNED_MSIX_PENDING;
+        }
+
+        schedule_work(&assigned_dev->interrupt_work);
+
+        if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) {
+                disable_irq_nosync(irq);
+                assigned_dev->host_irq_disabled = true;
+        }
+
+out:
+        spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags);
+        return IRQ_HANDLED;
+}
+
+/* Ack the irq line for an assigned device */
+static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
+{
+        struct kvm_assigned_dev_kernel *dev;
+        unsigned long flags;
+
+        if (kian->gsi == -1)
+                return;
+
+        dev = container_of(kian, struct kvm_assigned_dev_kernel,
+                           ack_notifier);
+
+        kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
+
+        /* The guest irq may be shared so this ack may be
+         * from another device.
+         */
+        spin_lock_irqsave(&dev->assigned_dev_lock, flags);
+        if (dev->host_irq_disabled) {
+                enable_irq(dev->host_irq);
+                dev->host_irq_disabled = false;
+        }
+        spin_unlock_irqrestore(&dev->assigned_dev_lock, flags);
+}
+
+static void deassign_guest_irq(struct kvm *kvm,
+                               struct kvm_assigned_dev_kernel *assigned_dev)
+{
+        kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier);
+        assigned_dev->ack_notifier.gsi = -1;
+
+        if (assigned_dev->irq_source_id != -1)
+                kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
+        assigned_dev->irq_source_id = -1;
+        assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK);
+}
+
+/* The function implicit hold kvm->lock mutex due to cancel_work_sync() */
+static void deassign_host_irq(struct kvm *kvm,
+                              struct kvm_assigned_dev_kernel *assigned_dev)
+{
+        /*
+         * In kvm_free_device_irq, cancel_work_sync return true if:
+         * 1. work is scheduled, and then cancelled.
+         * 2. work callback is executed.
+         *
+         * The first one ensured that the irq is disabled and no more events
+         * would happen. But for the second one, the irq may be enabled (e.g.
+         * for MSI). So we disable irq here to prevent further events.
+         *
+         * Notice this maybe result in nested disable if the interrupt type is
+         * INTx, but it's OK for we are going to free it.
+         *
+         * If this function is a part of VM destroy, please ensure that till
+         * now, the kvm state is still legal for probably we also have to wait
+         * interrupt_work done.
+         */
+        if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
+                int i;
+                for (i = 0; i < assigned_dev->entries_nr; i++)
+                        disable_irq_nosync(assigned_dev->
+                                           host_msix_entries[i].vector);
+
+                cancel_work_sync(&assigned_dev->interrupt_work);
+
+                for (i = 0; i < assigned_dev->entries_nr; i++)
+                        free_irq(assigned_dev->host_msix_entries[i].vector,
+                                 (void *)assigned_dev);
+
+                assigned_dev->entries_nr = 0;
+                kfree(assigned_dev->host_msix_entries);
+                kfree(assigned_dev->guest_msix_entries);
+                pci_disable_msix(assigned_dev->dev);
+        } else {
+                /* Deal with MSI and INTx */
+                disable_irq_nosync(assigned_dev->host_irq);
+                cancel_work_sync(&assigned_dev->interrupt_work);
+
+                free_irq(assigned_dev->host_irq, (void *)assigned_dev);
+
+                if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI)
+                        pci_disable_msi(assigned_dev->dev);
+        }
+
+        assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK);
+}
+
+static int kvm_deassign_irq(struct kvm *kvm,
+                            struct kvm_assigned_dev_kernel *assigned_dev,
+                            unsigned long irq_requested_type)
+{
+        unsigned long guest_irq_type, host_irq_type;
+
+        if (!irqchip_in_kernel(kvm))
+                return -EINVAL;
+        /* no irq assignment to deassign */
+        if (!assigned_dev->irq_requested_type)
+                return -ENXIO;
+
+        host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK;
+        guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK;
+
+        if (host_irq_type)
+                deassign_host_irq(kvm, assigned_dev);
+        if (guest_irq_type)
+                deassign_guest_irq(kvm, assigned_dev);
+
+        return 0;
+}
+
+static void kvm_free_assigned_irq(struct kvm *kvm,
+                                  struct kvm_assigned_dev_kernel *assigned_dev)
+{
+        kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type);
+}
+
+static void kvm_free_assigned_device(struct kvm *kvm,
+                                     struct kvm_assigned_dev_kernel
+                                     *assigned_dev)
+{
+        kvm_free_assigned_irq(kvm, assigned_dev);
+
+        pci_reset_function(assigned_dev->dev);
+
+        pci_release_regions(assigned_dev->dev);
+        pci_disable_device(assigned_dev->dev);
+        pci_dev_put(assigned_dev->dev);
+
+        list_del(&assigned_dev->list);
+        kfree(assigned_dev);
+}
+
+void kvm_free_all_assigned_devices(struct kvm *kvm)
+{
+        struct list_head *ptr, *ptr2;
+        struct kvm_assigned_dev_kernel *assigned_dev;
+
+        list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) {
+                assigned_dev = list_entry(ptr,
+                                          struct kvm_assigned_dev_kernel,
+                                          list);
+
+                kvm_free_assigned_device(kvm, assigned_dev);
+        }
+}
+
+static int assigned_device_enable_host_intx(struct kvm *kvm,
+                                            struct kvm_assigned_dev_kernel *dev)
+{
+        dev->host_irq = dev->dev->irq;
+        /* Even though this is PCI, we don't want to use shared
+         * interrupts. Sharing host devices with guest-assigned devices
+         * on the same interrupt line is not a happy situation: there
+         * are going to be long delays in accepting, acking, etc.
+         */
+        if (request_irq(dev->host_irq, kvm_assigned_dev_intr,
+                        0, "kvm_assigned_intx_device", (void *)dev))
+                return -EIO;
+        return 0;
+}
+
+#ifdef __KVM_HAVE_MSI
+static int assigned_device_enable_host_msi(struct kvm *kvm,
+                                           struct kvm_assigned_dev_kernel *dev)
+{
+        int r;
+
+        if (!dev->dev->msi_enabled) {
+                r = pci_enable_msi(dev->dev);
+                if (r)
+                        return r;
+        }
+
+        dev->host_irq = dev->dev->irq;
+        if (request_irq(dev->host_irq, kvm_assigned_dev_intr, 0,
+                        "kvm_assigned_msi_device", (void *)dev)) {
+                pci_disable_msi(dev->dev);
+                return -EIO;
+        }
+
+        return 0;
+}
+#endif
+
+#ifdef __KVM_HAVE_MSIX
+static int assigned_device_enable_host_msix(struct kvm *kvm,
+                                            struct kvm_assigned_dev_kernel *dev)
+{
+        int i, r = -EINVAL;
+
+        /* host_msix_entries and guest_msix_entries should have been
+         * initialized */
+        if (dev->entries_nr == 0)
+                return r;
+
+        r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr);
+        if (r)
+                return r;
+
+        for (i = 0; i < dev->entries_nr; i++) {
+                r = request_irq(dev->host_msix_entries[i].vector,
+                                kvm_assigned_dev_intr, 0,
+                                "kvm_assigned_msix_device",
+                                (void *)dev);
+                /* FIXME: free requested_irq's on failure */
+                if (r)
+                        return r;
+        }
+
+        return 0;
+}
+
+#endif
+
+static int assigned_device_enable_guest_intx(struct kvm *kvm,
+                                struct kvm_assigned_dev_kernel *dev,
+                                struct kvm_assigned_irq *irq)
+{
+        dev->guest_irq = irq->guest_irq;
+        dev->ack_notifier.gsi = irq->guest_irq;
+        return 0;
+}
+
+#ifdef __KVM_HAVE_MSI
+static int assigned_device_enable_guest_msi(struct kvm *kvm,
+                        struct kvm_assigned_dev_kernel *dev,
+                        struct kvm_assigned_irq *irq)
+{
+        dev->guest_irq = irq->guest_irq;
+        dev->ack_notifier.gsi = -1;
+        dev->host_irq_disabled = false;
+        return 0;
+}
+#endif
+
+#ifdef __KVM_HAVE_MSIX
+static int assigned_device_enable_guest_msix(struct kvm *kvm,
+                        struct kvm_assigned_dev_kernel *dev,
+                        struct kvm_assigned_irq *irq)
+{
+        dev->guest_irq = irq->guest_irq;
+        dev->ack_notifier.gsi = -1;
+        dev->host_irq_disabled = false;
+        return 0;
+}
+#endif
+
+static int assign_host_irq(struct kvm *kvm,
+                           struct kvm_assigned_dev_kernel *dev,
+                           __u32 host_irq_type)
+{
+        int r = -EEXIST;
+
+        if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK)
+                return r;
+
+        switch (host_irq_type) {
+        case KVM_DEV_IRQ_HOST_INTX:
+                r = assigned_device_enable_host_intx(kvm, dev);
+                break;
+#ifdef __KVM_HAVE_MSI
+        case KVM_DEV_IRQ_HOST_MSI:
+                r = assigned_device_enable_host_msi(kvm, dev);
+                break;
+#endif
+#ifdef __KVM_HAVE_MSIX
+        case KVM_DEV_IRQ_HOST_MSIX:
+                r = assigned_device_enable_host_msix(kvm, dev);
+                break;
+#endif
+        default:
+                r = -EINVAL;
+        }
+
+        if (!r)
+                dev->irq_requested_type |= host_irq_type;
+
+        return r;
+}
+
+static int assign_guest_irq(struct kvm *kvm,
+                            struct kvm_assigned_dev_kernel *dev,
+                            struct kvm_assigned_irq *irq,
+                            unsigned long guest_irq_type)
+{
+        int id;
+        int r = -EEXIST;
+
+        if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK)
+                return r;
+
+        id = kvm_request_irq_source_id(kvm);
+        if (id < 0)
+                return id;
+
+        dev->irq_source_id = id;
+
+        switch (guest_irq_type) {
+        case KVM_DEV_IRQ_GUEST_INTX:
+                r = assigned_device_enable_guest_intx(kvm, dev, irq);
+                break;
+#ifdef __KVM_HAVE_MSI
+        case KVM_DEV_IRQ_GUEST_MSI:
+                r = assigned_device_enable_guest_msi(kvm, dev, irq);
+                break;
+#endif
+#ifdef __KVM_HAVE_MSIX
+        case KVM_DEV_IRQ_GUEST_MSIX:
+                r = assigned_device_enable_guest_msix(kvm, dev, irq);
+                break;
+#endif
+        default:
+                r = -EINVAL;
+        }
+
+        if (!r) {
+                dev->irq_requested_type |= guest_irq_type;
+                kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier);
+        } else
+                kvm_free_irq_source_id(kvm, dev->irq_source_id);
+
+        return r;
+}
+
+/* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */
+static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
+                                   struct kvm_assigned_irq *assigned_irq)
+{
+        int r = -EINVAL;
+        struct kvm_assigned_dev_kernel *match;
+        unsigned long host_irq_type, guest_irq_type;
+
+        if (!capable(CAP_SYS_RAWIO))
+                return -EPERM;
+
+        if (!irqchip_in_kernel(kvm))
+                return r;
+
+        mutex_lock(&kvm->lock);
+        r = -ENODEV;
+        match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
+                                      assigned_irq->assigned_dev_id);
+        if (!match)
+                goto out;
+
+        host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK);
+        guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK);
+
+        r = -EINVAL;
+        /* can only assign one type at a time */
+        if (hweight_long(host_irq_type) > 1)
+                goto out;
+        if (hweight_long(guest_irq_type) > 1)
+                goto out;
+        if (host_irq_type == 0 && guest_irq_type == 0)
+                goto out;
+
+        r = 0;
+        if (host_irq_type)
+                r = assign_host_irq(kvm, match, host_irq_type);
+        if (r)
+                goto out;
+
+        if (guest_irq_type)
+                r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type);
+out:
+        mutex_unlock(&kvm->lock);
+        return r;
+}
+
+static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
+                                         struct kvm_assigned_irq
+                                         *assigned_irq)
+{
+        int r = -ENODEV;
+        struct kvm_assigned_dev_kernel *match;
+
+        mutex_lock(&kvm->lock);
+
+        match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
+                                      assigned_irq->assigned_dev_id);
+        if (!match)
+                goto out;
+
+        r = kvm_deassign_irq(kvm, match, assigned_irq->flags);
+out:
+        mutex_unlock(&kvm->lock);
+        return r;
+}
+
+static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
+                                      struct kvm_assigned_pci_dev *assigned_dev)
+{
+        int r = 0;
+        struct kvm_assigned_dev_kernel *match;
+        struct pci_dev *dev;
+
+        down_read(&kvm->slots_lock);
+        mutex_lock(&kvm->lock);
+
+        match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
+                                      assigned_dev->assigned_dev_id);
+        if (match) {
+                /* device already assigned */
+                r = -EEXIST;
+                goto out;
+        }
+
+        match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL);
+        if (match == NULL) {
+                printk(KERN_INFO "%s: Couldn't allocate memory\n",
+                       __func__);
+                r = -ENOMEM;
+                goto out;
+        }
+        dev = pci_get_bus_and_slot(assigned_dev->busnr,
+                                   assigned_dev->devfn);
+        if (!dev) {
+                printk(KERN_INFO "%s: host device not found\n", __func__);
+                r = -EINVAL;
+                goto out_free;
+        }
+        if (pci_enable_device(dev)) {
+                printk(KERN_INFO "%s: Could not enable PCI device\n", __func__);
+                r = -EBUSY;
+                goto out_put;
+        }
+        r = pci_request_regions(dev, "kvm_assigned_device");
+        if (r) {
+                printk(KERN_INFO "%s: Could not get access to device regions\n",
+                       __func__);
+                goto out_disable;
+        }
+
+        pci_reset_function(dev);
+
+        match->assigned_dev_id = assigned_dev->assigned_dev_id;
+        match->host_busnr = assigned_dev->busnr;
+        match->host_devfn = assigned_dev->devfn;
+        match->flags = assigned_dev->flags;
+        match->dev = dev;
+        spin_lock_init(&match->assigned_dev_lock);
+        match->irq_source_id = -1;
+        match->kvm = kvm;
+        match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
+        INIT_WORK(&match->interrupt_work,
+                  kvm_assigned_dev_interrupt_work_handler);
+
+        list_add(&match->list, &kvm->arch.assigned_dev_head);
+
+        if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
+                if (!kvm->arch.iommu_domain) {
+                        r = kvm_iommu_map_guest(kvm);
+                        if (r)
+                                goto out_list_del;
+                }
+                r = kvm_assign_device(kvm, match);
+                if (r)
+                        goto out_list_del;
+        }
+
+out:
+        mutex_unlock(&kvm->lock);
+        up_read(&kvm->slots_lock);
+        return r;
+out_list_del:
+        list_del(&match->list);
+        pci_release_regions(dev);
+out_disable:
+        pci_disable_device(dev);
+out_put:
+        pci_dev_put(dev);
+out_free:
+        kfree(match);
+        mutex_unlock(&kvm->lock);
+        up_read(&kvm->slots_lock);
+        return r;
+}
+
+static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
+                struct kvm_assigned_pci_dev *assigned_dev)
+{
+        int r = 0;
+        struct kvm_assigned_dev_kernel *match;
+
+        mutex_lock(&kvm->lock);
+
+        match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
+                                      assigned_dev->assigned_dev_id);
+        if (!match) {
+                printk(KERN_INFO "%s: device hasn't been assigned before, "
+                  "so cannot be deassigned\n", __func__);
+                r = -EINVAL;
+                goto out;
+        }
+
+        if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
+                kvm_deassign_device(kvm, match);
+
+        kvm_free_assigned_device(kvm, match);
+
+out:
+        mutex_unlock(&kvm->lock);
+        return r;
+}
+
+
+#ifdef __KVM_HAVE_MSIX
+static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm,
+                                    struct kvm_assigned_msix_nr *entry_nr)
+{
+        int r = 0;
+        struct kvm_assigned_dev_kernel *adev;
+
+        mutex_lock(&kvm->lock);
+
+        adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
+                                      entry_nr->assigned_dev_id);
+        if (!adev) {
+                r = -EINVAL;
+                goto msix_nr_out;
+        }
+
+        if (adev->entries_nr == 0) {
+                adev->entries_nr = entry_nr->entry_nr;
+                if (adev->entries_nr == 0 ||
+                    adev->entries_nr >= KVM_MAX_MSIX_PER_DEV) {
+                        r = -EINVAL;
+                        goto msix_nr_out;
+                }
+
+                adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) *
+                                                entry_nr->entry_nr,
+                                                GFP_KERNEL);
+                if (!adev->host_msix_entries) {
+                        r = -ENOMEM;
+                        goto msix_nr_out;
+                }
+                adev->guest_msix_entries = kzalloc(
+                                sizeof(struct kvm_guest_msix_entry) *
+                                entry_nr->entry_nr, GFP_KERNEL);
+                if (!adev->guest_msix_entries) {
+                        kfree(adev->host_msix_entries);
+                        r = -ENOMEM;
+                        goto msix_nr_out;
+                }
+        } else /* Not allowed set MSI-X number twice */
+                r = -EINVAL;
+msix_nr_out:
+        mutex_unlock(&kvm->lock);
+        return r;
+}
+
+static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm,
+                                       struct kvm_assigned_msix_entry *entry)
+{
+        int r = 0, i;
+        struct kvm_assigned_dev_kernel *adev;
+
+        mutex_lock(&kvm->lock);
+
+        adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
+                                      entry->assigned_dev_id);
+
+        if (!adev) {
+                r = -EINVAL;
+                goto msix_entry_out;
+        }
+
+        for (i = 0; i < adev->entries_nr; i++)
+                if (adev->guest_msix_entries[i].vector == 0 ||
+                    adev->guest_msix_entries[i].entry == entry->entry) {
+                        adev->guest_msix_entries[i].entry = entry->entry;
+                        adev->guest_msix_entries[i].vector = entry->gsi;
+                        adev->host_msix_entries[i].entry = entry->entry;
+                        break;
+                }
+        if (i == adev->entries_nr) {
+                r = -ENOSPC;
+                goto msix_entry_out;
+        }
+
+msix_entry_out:
+        mutex_unlock(&kvm->lock);
+
+        return r;
+}
+#endif
+
+long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
+                                  unsigned long arg)
+{
+        void __user *argp = (void __user *)arg;
+        int r = -ENOTTY;
+
+        switch (ioctl) {
+        case KVM_ASSIGN_PCI_DEVICE: {
+                struct kvm_assigned_pci_dev assigned_dev;
+
+                r = -EFAULT;
+                if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
+                        goto out;
+                r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev);
+                if (r)
+                        goto out;
+                break;
+        }
+        case KVM_ASSIGN_IRQ: {
+                r = -EOPNOTSUPP;
+                break;
+        }
+#ifdef KVM_CAP_ASSIGN_DEV_IRQ
+        case KVM_ASSIGN_DEV_IRQ: {
+                struct kvm_assigned_irq assigned_irq;
+
+                r = -EFAULT;
+                if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
+                        goto out;
+                r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq);
+                if (r)
+                        goto out;
+                break;
+        }
+        case KVM_DEASSIGN_DEV_IRQ: {
+                struct kvm_assigned_irq assigned_irq;
+
+                r = -EFAULT;
+                if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
+                        goto out;
+                r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq);
+                if (r)
+                        goto out;
+                break;
+        }
+#endif
+#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
+        case KVM_DEASSIGN_PCI_DEVICE: {
+                struct kvm_assigned_pci_dev assigned_dev;
+
+                r = -EFAULT;
+                if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
+                        goto out;
+                r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev);
+                if (r)
+                        goto out;
+                break;
+        }
+#endif
+#ifdef KVM_CAP_IRQ_ROUTING
+        case KVM_SET_GSI_ROUTING: {
+                struct kvm_irq_routing routing;
+                struct kvm_irq_routing __user *urouting;
+                struct kvm_irq_routing_entry *entries;
+
+                r = -EFAULT;
+                if (copy_from_user(&routing, argp, sizeof(routing)))
+                        goto out;
+                r = -EINVAL;
+                if (routing.nr >= KVM_MAX_IRQ_ROUTES)
+                        goto out;
+                if (routing.flags)
+                        goto out;
+                r = -ENOMEM;
+                entries = vmalloc(routing.nr * sizeof(*entries));
+                if (!entries)
+                        goto out;
+                r = -EFAULT;
+                urouting = argp;
+                if (copy_from_user(entries, urouting->entries,
+                                   routing.nr * sizeof(*entries)))
+                        goto out_free_irq_routing;
+                r = kvm_set_irq_routing(kvm, entries, routing.nr,
+                                        routing.flags);
+        out_free_irq_routing:
+                vfree(entries);
+                break;
+        }
+#endif /* KVM_CAP_IRQ_ROUTING */
+#ifdef __KVM_HAVE_MSIX
+        case KVM_ASSIGN_SET_MSIX_NR: {
+                struct kvm_assigned_msix_nr entry_nr;
+                r = -EFAULT;
+                if (copy_from_user(&entry_nr, argp, sizeof entry_nr))
+                        goto out;
+                r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr);
+                if (r)
+                        goto out;
+                break;
+        }
+        case KVM_ASSIGN_SET_MSIX_ENTRY: {
+                struct kvm_assigned_msix_entry entry;
+                r = -EFAULT;
+                if (copy_from_user(&entry, argp, sizeof entry))
+                        goto out;
+                r = kvm_vm_ioctl_set_msix_entry(kvm, &entry);
+                if (r)
+                        goto out;
+                break;
+        }
+#endif
+        }
+out:
+        return r;
+}
+