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818 lines
20 KiB
C
818 lines
20 KiB
C
/*
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* Kernel-based Virtual Machine - device assignment support
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*
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* Copyright (C) 2006-9 Red Hat, Inc
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include <linux/kvm_host.h>
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#include <linux/kvm.h>
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#include <linux/uaccess.h>
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#include <linux/vmalloc.h>
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#include <linux/errno.h>
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#include <linux/spinlock.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include "irq.h"
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static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
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int assigned_dev_id)
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{
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struct list_head *ptr;
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struct kvm_assigned_dev_kernel *match;
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list_for_each(ptr, head) {
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match = list_entry(ptr, struct kvm_assigned_dev_kernel, list);
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if (match->assigned_dev_id == assigned_dev_id)
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return match;
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}
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return NULL;
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}
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static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
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*assigned_dev, int irq)
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{
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int i, index;
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struct msix_entry *host_msix_entries;
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host_msix_entries = assigned_dev->host_msix_entries;
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index = -1;
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for (i = 0; i < assigned_dev->entries_nr; i++)
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if (irq == host_msix_entries[i].vector) {
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index = i;
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break;
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}
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if (index < 0) {
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printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n");
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return 0;
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}
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return index;
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}
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static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work)
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{
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struct kvm_assigned_dev_kernel *assigned_dev;
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struct kvm *kvm;
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int i;
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assigned_dev = container_of(work, struct kvm_assigned_dev_kernel,
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interrupt_work);
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kvm = assigned_dev->kvm;
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spin_lock_irq(&assigned_dev->assigned_dev_lock);
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if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
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struct kvm_guest_msix_entry *guest_entries =
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assigned_dev->guest_msix_entries;
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for (i = 0; i < assigned_dev->entries_nr; i++) {
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if (!(guest_entries[i].flags &
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KVM_ASSIGNED_MSIX_PENDING))
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continue;
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guest_entries[i].flags &= ~KVM_ASSIGNED_MSIX_PENDING;
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kvm_set_irq(assigned_dev->kvm,
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assigned_dev->irq_source_id,
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guest_entries[i].vector, 1);
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}
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} else
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kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
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assigned_dev->guest_irq, 1);
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spin_unlock_irq(&assigned_dev->assigned_dev_lock);
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}
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static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id)
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{
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unsigned long flags;
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struct kvm_assigned_dev_kernel *assigned_dev =
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(struct kvm_assigned_dev_kernel *) dev_id;
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spin_lock_irqsave(&assigned_dev->assigned_dev_lock, flags);
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if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
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int index = find_index_from_host_irq(assigned_dev, irq);
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if (index < 0)
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goto out;
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assigned_dev->guest_msix_entries[index].flags |=
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KVM_ASSIGNED_MSIX_PENDING;
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}
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schedule_work(&assigned_dev->interrupt_work);
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if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) {
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disable_irq_nosync(irq);
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assigned_dev->host_irq_disabled = true;
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}
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out:
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spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags);
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return IRQ_HANDLED;
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}
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/* Ack the irq line for an assigned device */
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static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
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{
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struct kvm_assigned_dev_kernel *dev;
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unsigned long flags;
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if (kian->gsi == -1)
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return;
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dev = container_of(kian, struct kvm_assigned_dev_kernel,
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ack_notifier);
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kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
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/* The guest irq may be shared so this ack may be
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* from another device.
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*/
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spin_lock_irqsave(&dev->assigned_dev_lock, flags);
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if (dev->host_irq_disabled) {
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enable_irq(dev->host_irq);
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dev->host_irq_disabled = false;
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}
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spin_unlock_irqrestore(&dev->assigned_dev_lock, flags);
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}
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static void deassign_guest_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev)
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{
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kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier);
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assigned_dev->ack_notifier.gsi = -1;
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if (assigned_dev->irq_source_id != -1)
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kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
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assigned_dev->irq_source_id = -1;
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assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK);
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}
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/* The function implicit hold kvm->lock mutex due to cancel_work_sync() */
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static void deassign_host_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev)
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{
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/*
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* In kvm_free_device_irq, cancel_work_sync return true if:
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* 1. work is scheduled, and then cancelled.
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* 2. work callback is executed.
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*
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* The first one ensured that the irq is disabled and no more events
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* would happen. But for the second one, the irq may be enabled (e.g.
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* for MSI). So we disable irq here to prevent further events.
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*
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* Notice this maybe result in nested disable if the interrupt type is
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* INTx, but it's OK for we are going to free it.
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*
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* If this function is a part of VM destroy, please ensure that till
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* now, the kvm state is still legal for probably we also have to wait
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* interrupt_work done.
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*/
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if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
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int i;
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for (i = 0; i < assigned_dev->entries_nr; i++)
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disable_irq_nosync(assigned_dev->
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host_msix_entries[i].vector);
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cancel_work_sync(&assigned_dev->interrupt_work);
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for (i = 0; i < assigned_dev->entries_nr; i++)
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free_irq(assigned_dev->host_msix_entries[i].vector,
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(void *)assigned_dev);
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assigned_dev->entries_nr = 0;
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kfree(assigned_dev->host_msix_entries);
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kfree(assigned_dev->guest_msix_entries);
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pci_disable_msix(assigned_dev->dev);
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} else {
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/* Deal with MSI and INTx */
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disable_irq_nosync(assigned_dev->host_irq);
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cancel_work_sync(&assigned_dev->interrupt_work);
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free_irq(assigned_dev->host_irq, (void *)assigned_dev);
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if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI)
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pci_disable_msi(assigned_dev->dev);
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}
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assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK);
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}
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static int kvm_deassign_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev,
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unsigned long irq_requested_type)
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{
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unsigned long guest_irq_type, host_irq_type;
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if (!irqchip_in_kernel(kvm))
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return -EINVAL;
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/* no irq assignment to deassign */
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if (!assigned_dev->irq_requested_type)
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return -ENXIO;
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host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK;
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guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK;
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if (host_irq_type)
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deassign_host_irq(kvm, assigned_dev);
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if (guest_irq_type)
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deassign_guest_irq(kvm, assigned_dev);
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return 0;
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}
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static void kvm_free_assigned_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *assigned_dev)
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{
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kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type);
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}
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static void kvm_free_assigned_device(struct kvm *kvm,
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struct kvm_assigned_dev_kernel
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*assigned_dev)
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{
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kvm_free_assigned_irq(kvm, assigned_dev);
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pci_reset_function(assigned_dev->dev);
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pci_release_regions(assigned_dev->dev);
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pci_disable_device(assigned_dev->dev);
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pci_dev_put(assigned_dev->dev);
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list_del(&assigned_dev->list);
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kfree(assigned_dev);
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}
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void kvm_free_all_assigned_devices(struct kvm *kvm)
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{
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struct list_head *ptr, *ptr2;
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struct kvm_assigned_dev_kernel *assigned_dev;
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list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) {
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assigned_dev = list_entry(ptr,
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struct kvm_assigned_dev_kernel,
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list);
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kvm_free_assigned_device(kvm, assigned_dev);
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}
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}
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static int assigned_device_enable_host_intx(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev)
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{
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dev->host_irq = dev->dev->irq;
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/* Even though this is PCI, we don't want to use shared
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* interrupts. Sharing host devices with guest-assigned devices
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* on the same interrupt line is not a happy situation: there
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* are going to be long delays in accepting, acking, etc.
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*/
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if (request_irq(dev->host_irq, kvm_assigned_dev_intr,
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0, "kvm_assigned_intx_device", (void *)dev))
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return -EIO;
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return 0;
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}
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#ifdef __KVM_HAVE_MSI
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static int assigned_device_enable_host_msi(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev)
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{
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int r;
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if (!dev->dev->msi_enabled) {
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r = pci_enable_msi(dev->dev);
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if (r)
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return r;
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}
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dev->host_irq = dev->dev->irq;
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if (request_irq(dev->host_irq, kvm_assigned_dev_intr, 0,
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"kvm_assigned_msi_device", (void *)dev)) {
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pci_disable_msi(dev->dev);
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return -EIO;
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}
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return 0;
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}
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#endif
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#ifdef __KVM_HAVE_MSIX
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static int assigned_device_enable_host_msix(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev)
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{
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int i, r = -EINVAL;
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/* host_msix_entries and guest_msix_entries should have been
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* initialized */
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if (dev->entries_nr == 0)
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return r;
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r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr);
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if (r)
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return r;
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for (i = 0; i < dev->entries_nr; i++) {
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r = request_irq(dev->host_msix_entries[i].vector,
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kvm_assigned_dev_intr, 0,
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"kvm_assigned_msix_device",
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(void *)dev);
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/* FIXME: free requested_irq's on failure */
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if (r)
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return r;
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}
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return 0;
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}
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#endif
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static int assigned_device_enable_guest_intx(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev,
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struct kvm_assigned_irq *irq)
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{
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dev->guest_irq = irq->guest_irq;
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dev->ack_notifier.gsi = irq->guest_irq;
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return 0;
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}
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#ifdef __KVM_HAVE_MSI
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static int assigned_device_enable_guest_msi(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev,
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struct kvm_assigned_irq *irq)
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{
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dev->guest_irq = irq->guest_irq;
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dev->ack_notifier.gsi = -1;
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dev->host_irq_disabled = false;
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return 0;
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}
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#endif
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#ifdef __KVM_HAVE_MSIX
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static int assigned_device_enable_guest_msix(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev,
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struct kvm_assigned_irq *irq)
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{
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dev->guest_irq = irq->guest_irq;
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dev->ack_notifier.gsi = -1;
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dev->host_irq_disabled = false;
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return 0;
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}
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#endif
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static int assign_host_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev,
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__u32 host_irq_type)
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{
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int r = -EEXIST;
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if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK)
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return r;
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switch (host_irq_type) {
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case KVM_DEV_IRQ_HOST_INTX:
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r = assigned_device_enable_host_intx(kvm, dev);
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break;
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#ifdef __KVM_HAVE_MSI
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case KVM_DEV_IRQ_HOST_MSI:
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r = assigned_device_enable_host_msi(kvm, dev);
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break;
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#endif
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#ifdef __KVM_HAVE_MSIX
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case KVM_DEV_IRQ_HOST_MSIX:
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r = assigned_device_enable_host_msix(kvm, dev);
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break;
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#endif
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default:
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r = -EINVAL;
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}
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if (!r)
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dev->irq_requested_type |= host_irq_type;
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return r;
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}
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static int assign_guest_irq(struct kvm *kvm,
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struct kvm_assigned_dev_kernel *dev,
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struct kvm_assigned_irq *irq,
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unsigned long guest_irq_type)
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{
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int id;
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int r = -EEXIST;
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if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK)
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return r;
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id = kvm_request_irq_source_id(kvm);
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if (id < 0)
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return id;
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dev->irq_source_id = id;
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switch (guest_irq_type) {
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case KVM_DEV_IRQ_GUEST_INTX:
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r = assigned_device_enable_guest_intx(kvm, dev, irq);
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break;
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#ifdef __KVM_HAVE_MSI
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case KVM_DEV_IRQ_GUEST_MSI:
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r = assigned_device_enable_guest_msi(kvm, dev, irq);
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break;
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#endif
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#ifdef __KVM_HAVE_MSIX
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case KVM_DEV_IRQ_GUEST_MSIX:
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r = assigned_device_enable_guest_msix(kvm, dev, irq);
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break;
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#endif
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default:
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r = -EINVAL;
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}
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if (!r) {
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dev->irq_requested_type |= guest_irq_type;
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kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier);
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} else
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kvm_free_irq_source_id(kvm, dev->irq_source_id);
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return r;
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}
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/* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */
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static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
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struct kvm_assigned_irq *assigned_irq)
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{
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int r = -EINVAL;
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struct kvm_assigned_dev_kernel *match;
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unsigned long host_irq_type, guest_irq_type;
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if (!capable(CAP_SYS_RAWIO))
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return -EPERM;
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if (!irqchip_in_kernel(kvm))
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return r;
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mutex_lock(&kvm->lock);
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r = -ENODEV;
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match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
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assigned_irq->assigned_dev_id);
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if (!match)
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goto out;
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host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK);
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guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK);
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r = -EINVAL;
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/* can only assign one type at a time */
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if (hweight_long(host_irq_type) > 1)
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goto out;
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if (hweight_long(guest_irq_type) > 1)
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goto out;
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if (host_irq_type == 0 && guest_irq_type == 0)
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goto out;
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r = 0;
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if (host_irq_type)
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r = assign_host_irq(kvm, match, host_irq_type);
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if (r)
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goto out;
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if (guest_irq_type)
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r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type);
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out:
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mutex_unlock(&kvm->lock);
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return r;
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}
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static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
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struct kvm_assigned_irq
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*assigned_irq)
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{
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int r = -ENODEV;
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struct kvm_assigned_dev_kernel *match;
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mutex_lock(&kvm->lock);
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match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
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assigned_irq->assigned_dev_id);
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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;
|
|
}
|
|
|