zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/Kconfig b/ap/os/linux/linux-3.4.x/virt/kvm/Kconfig
new file mode 100644
index 0000000..f63ccb0
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/Kconfig
@@ -0,0 +1,20 @@
+# KVM common configuration items and defaults
+
+config HAVE_KVM
+ bool
+
+config HAVE_KVM_IRQCHIP
+ bool
+
+config HAVE_KVM_EVENTFD
+ bool
+ select EVENTFD
+
+config KVM_APIC_ARCHITECTURE
+ bool
+
+config KVM_MMIO
+ bool
+
+config KVM_ASYNC_PF
+ bool
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/assigned-dev.c b/ap/os/linux/linux-3.4.x/virt/kvm/assigned-dev.c
new file mode 100644
index 0000000..01f572c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/assigned-dev.c
@@ -0,0 +1,1027 @@
+/*
+ * Kernel-based Virtual Machine - device assignment support
+ *
+ * Copyright (C) 2010 Red Hat, Inc. and/or its affiliates.
+ *
+ * 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 <linux/slab.h>
+#include <linux/namei.h>
+#include <linux/fs.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 index;
+}
+
+static irqreturn_t kvm_assigned_dev_intx(int irq, void *dev_id)
+{
+ struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
+ int ret;
+
+ spin_lock(&assigned_dev->intx_lock);
+ if (pci_check_and_mask_intx(assigned_dev->dev)) {
+ assigned_dev->host_irq_disabled = true;
+ ret = IRQ_WAKE_THREAD;
+ } else
+ ret = IRQ_NONE;
+ spin_unlock(&assigned_dev->intx_lock);
+
+ return ret;
+}
+
+static void
+kvm_assigned_dev_raise_guest_irq(struct kvm_assigned_dev_kernel *assigned_dev,
+ int vector)
+{
+ if (unlikely(assigned_dev->irq_requested_type &
+ KVM_DEV_IRQ_GUEST_INTX)) {
+ spin_lock(&assigned_dev->intx_mask_lock);
+ if (!(assigned_dev->flags & KVM_DEV_ASSIGN_MASK_INTX))
+ kvm_set_irq(assigned_dev->kvm,
+ assigned_dev->irq_source_id, vector, 1);
+ spin_unlock(&assigned_dev->intx_mask_lock);
+ } else
+ kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
+ vector, 1);
+}
+
+static irqreturn_t kvm_assigned_dev_thread_intx(int irq, void *dev_id)
+{
+ struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
+
+ if (!(assigned_dev->flags & KVM_DEV_ASSIGN_PCI_2_3)) {
+ spin_lock_irq(&assigned_dev->intx_lock);
+ disable_irq_nosync(irq);
+ assigned_dev->host_irq_disabled = true;
+ spin_unlock_irq(&assigned_dev->intx_lock);
+ }
+
+ kvm_assigned_dev_raise_guest_irq(assigned_dev,
+ assigned_dev->guest_irq);
+
+ return IRQ_HANDLED;
+}
+
+#ifdef __KVM_HAVE_MSI
+static irqreturn_t kvm_assigned_dev_thread_msi(int irq, void *dev_id)
+{
+ struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
+
+ kvm_assigned_dev_raise_guest_irq(assigned_dev,
+ assigned_dev->guest_irq);
+
+ return IRQ_HANDLED;
+}
+#endif
+
+#ifdef __KVM_HAVE_MSIX
+static irqreturn_t kvm_assigned_dev_thread_msix(int irq, void *dev_id)
+{
+ struct kvm_assigned_dev_kernel *assigned_dev = dev_id;
+ int index = find_index_from_host_irq(assigned_dev, irq);
+ u32 vector;
+
+ if (index >= 0) {
+ vector = assigned_dev->guest_msix_entries[index].vector;
+ kvm_assigned_dev_raise_guest_irq(assigned_dev, vector);
+ }
+
+ return IRQ_HANDLED;
+}
+#endif
+
+/* 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 =
+ container_of(kian, struct kvm_assigned_dev_kernel,
+ ack_notifier);
+
+ kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
+
+ spin_lock(&dev->intx_mask_lock);
+
+ if (!(dev->flags & KVM_DEV_ASSIGN_MASK_INTX)) {
+ bool reassert = false;
+
+ spin_lock_irq(&dev->intx_lock);
+ /*
+ * The guest IRQ may be shared so this ack can come from an
+ * IRQ for another guest device.
+ */
+ if (dev->host_irq_disabled) {
+ if (!(dev->flags & KVM_DEV_ASSIGN_PCI_2_3))
+ enable_irq(dev->host_irq);
+ else if (!pci_check_and_unmask_intx(dev->dev))
+ reassert = true;
+ dev->host_irq_disabled = reassert;
+ }
+ spin_unlock_irq(&dev->intx_lock);
+
+ if (reassert)
+ kvm_set_irq(dev->kvm, dev->irq_source_id,
+ dev->guest_irq, 1);
+ }
+
+ spin_unlock(&dev->intx_mask_lock);
+}
+
+static void deassign_guest_irq(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *assigned_dev)
+{
+ if (assigned_dev->ack_notifier.gsi != -1)
+ kvm_unregister_irq_ack_notifier(kvm,
+ &assigned_dev->ack_notifier);
+
+ kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
+ assigned_dev->guest_irq, 0);
+
+ 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)
+{
+ /*
+ * 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
+ * on a currently running IRQ handler.
+ */
+ if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
+ int i;
+ for (i = 0; i < assigned_dev->entries_nr; i++)
+ disable_irq(assigned_dev->host_msix_entries[i].vector);
+
+ for (i = 0; i < assigned_dev->entries_nr; i++)
+ free_irq(assigned_dev->host_msix_entries[i].vector,
+ 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 */
+ if ((assigned_dev->irq_requested_type &
+ KVM_DEV_IRQ_HOST_INTX) &&
+ (assigned_dev->flags & KVM_DEV_ASSIGN_PCI_2_3)) {
+ spin_lock_irq(&assigned_dev->intx_lock);
+ pci_intx(assigned_dev->dev, false);
+ spin_unlock_irq(&assigned_dev->intx_lock);
+ synchronize_irq(assigned_dev->host_irq);
+ } else
+ disable_irq(assigned_dev->host_irq);
+
+ free_irq(assigned_dev->host_irq, 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);
+ if (pci_load_and_free_saved_state(assigned_dev->dev,
+ &assigned_dev->pci_saved_state))
+ printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
+ __func__, dev_name(&assigned_dev->dev->dev));
+ else
+ pci_restore_state(assigned_dev->dev);
+
+ assigned_dev->dev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
+
+ 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)
+{
+ irq_handler_t irq_handler;
+ unsigned long flags;
+
+ dev->host_irq = dev->dev->irq;
+
+ /*
+ * We can only share the IRQ line with other host devices if we are
+ * able to disable the IRQ source at device-level - independently of
+ * the guest driver. Otherwise host devices may suffer from unbounded
+ * IRQ latencies when the guest keeps the line asserted.
+ */
+ if (dev->flags & KVM_DEV_ASSIGN_PCI_2_3) {
+ irq_handler = kvm_assigned_dev_intx;
+ flags = IRQF_SHARED;
+ } else {
+ irq_handler = NULL;
+ flags = IRQF_ONESHOT;
+ }
+ if (request_threaded_irq(dev->host_irq, irq_handler,
+ kvm_assigned_dev_thread_intx, flags,
+ dev->irq_name, dev))
+ return -EIO;
+
+ if (dev->flags & KVM_DEV_ASSIGN_PCI_2_3) {
+ spin_lock_irq(&dev->intx_lock);
+ pci_intx(dev->dev, true);
+ spin_unlock_irq(&dev->intx_lock);
+ }
+ 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_threaded_irq(dev->host_irq, NULL,
+ kvm_assigned_dev_thread_msi, 0,
+ dev->irq_name, 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_threaded_irq(dev->host_msix_entries[i].vector,
+ NULL, kvm_assigned_dev_thread_msix,
+ 0, dev->irq_name, dev);
+ if (r)
+ goto err;
+ }
+
+ return 0;
+err:
+ for (i -= 1; i >= 0; i--)
+ free_irq(dev->host_msix_entries[i].vector, dev);
+ pci_disable_msix(dev->dev);
+ return r;
+}
+
+#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;
+ 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;
+ 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;
+
+ snprintf(dev->irq_name, sizeof(dev->irq_name), "kvm:%s",
+ pci_name(dev->dev));
+
+ 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;
+ }
+ dev->host_irq_disabled = false;
+
+ 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;
+ if (dev->ack_notifier.gsi != -1)
+ 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 (!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;
+ unsigned long irq_type;
+
+ mutex_lock(&kvm->lock);
+
+ match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
+ assigned_irq->assigned_dev_id);
+ if (!match)
+ goto out;
+
+ irq_type = assigned_irq->flags & (KVM_DEV_IRQ_HOST_MASK |
+ KVM_DEV_IRQ_GUEST_MASK);
+ r = kvm_deassign_irq(kvm, match, irq_type);
+out:
+ mutex_unlock(&kvm->lock);
+ return r;
+}
+
+/*
+ * We want to test whether the caller has been granted permissions to
+ * use this device. To be able to configure and control the device,
+ * the user needs access to PCI configuration space and BAR resources.
+ * These are accessed through PCI sysfs. PCI config space is often
+ * passed to the process calling this ioctl via file descriptor, so we
+ * can't rely on access to that file. We can check for permissions
+ * on each of the BAR resource files, which is a pretty clear
+ * indicator that the user has been granted access to the device.
+ */
+static int probe_sysfs_permissions(struct pci_dev *dev)
+{
+#ifdef CONFIG_SYSFS
+ int i;
+ bool bar_found = false;
+
+ for (i = PCI_STD_RESOURCES; i <= PCI_STD_RESOURCE_END; i++) {
+ char *kpath, *syspath;
+ struct path path;
+ struct inode *inode;
+ int r;
+
+ if (!pci_resource_len(dev, i))
+ continue;
+
+ kpath = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
+ if (!kpath)
+ return -ENOMEM;
+
+ /* Per sysfs-rules, sysfs is always at /sys */
+ syspath = kasprintf(GFP_KERNEL, "/sys%s/resource%d", kpath, i);
+ kfree(kpath);
+ if (!syspath)
+ return -ENOMEM;
+
+ r = kern_path(syspath, LOOKUP_FOLLOW, &path);
+ kfree(syspath);
+ if (r)
+ return r;
+
+ inode = path.dentry->d_inode;
+
+ r = inode_permission(inode, MAY_READ | MAY_WRITE | MAY_ACCESS);
+ path_put(&path);
+ if (r)
+ return r;
+
+ bar_found = true;
+ }
+
+ /* If no resources, probably something special */
+ if (!bar_found)
+ return -EPERM;
+
+ return 0;
+#else
+ return -EINVAL; /* No way to control the device without sysfs */
+#endif
+}
+
+static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
+ struct kvm_assigned_pci_dev *assigned_dev)
+{
+ int r = 0, idx;
+ struct kvm_assigned_dev_kernel *match;
+ struct pci_dev *dev;
+ u8 header_type;
+
+ if (!(assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU))
+ return -EINVAL;
+
+ mutex_lock(&kvm->lock);
+ idx = srcu_read_lock(&kvm->srcu);
+
+ 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_domain_bus_and_slot(assigned_dev->segnr,
+ assigned_dev->busnr,
+ assigned_dev->devfn);
+ if (!dev) {
+ printk(KERN_INFO "%s: host device not found\n", __func__);
+ r = -EINVAL;
+ goto out_free;
+ }
+
+ /* Don't allow bridges to be assigned */
+ pci_read_config_byte(dev, PCI_HEADER_TYPE, &header_type);
+ if ((header_type & PCI_HEADER_TYPE) != PCI_HEADER_TYPE_NORMAL) {
+ r = -EPERM;
+ goto out_put;
+ }
+
+ r = probe_sysfs_permissions(dev);
+ if (r)
+ goto out_put;
+
+ 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);
+ pci_save_state(dev);
+ match->pci_saved_state = pci_store_saved_state(dev);
+ if (!match->pci_saved_state)
+ printk(KERN_DEBUG "%s: Couldn't store %s saved state\n",
+ __func__, dev_name(&dev->dev));
+
+ if (!pci_intx_mask_supported(dev))
+ assigned_dev->flags &= ~KVM_DEV_ASSIGN_PCI_2_3;
+
+ match->assigned_dev_id = assigned_dev->assigned_dev_id;
+ match->host_segnr = assigned_dev->segnr;
+ match->host_busnr = assigned_dev->busnr;
+ match->host_devfn = assigned_dev->devfn;
+ match->flags = assigned_dev->flags;
+ match->dev = dev;
+ spin_lock_init(&match->intx_lock);
+ spin_lock_init(&match->intx_mask_lock);
+ match->irq_source_id = -1;
+ match->kvm = kvm;
+ match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
+
+ list_add(&match->list, &kvm->arch.assigned_dev_head);
+
+ 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:
+ srcu_read_unlock(&kvm->srcu, idx);
+ mutex_unlock(&kvm->lock);
+ return r;
+out_list_del:
+ if (pci_load_and_free_saved_state(dev, &match->pci_saved_state))
+ printk(KERN_INFO "%s: Couldn't reload %s saved state\n",
+ __func__, dev_name(&dev->dev));
+ list_del(&match->list);
+ pci_release_regions(dev);
+out_disable:
+ pci_disable_device(dev);
+out_put:
+ pci_dev_put(dev);
+out_free:
+ kfree(match);
+ srcu_read_unlock(&kvm->srcu, idx);
+ mutex_unlock(&kvm->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;
+ }
+
+ 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 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
+
+static int kvm_vm_ioctl_set_pci_irq_mask(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) {
+ r = -ENODEV;
+ goto out;
+ }
+
+ spin_lock(&match->intx_mask_lock);
+
+ match->flags &= ~KVM_DEV_ASSIGN_MASK_INTX;
+ match->flags |= assigned_dev->flags & KVM_DEV_ASSIGN_MASK_INTX;
+
+ if (match->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) {
+ if (assigned_dev->flags & KVM_DEV_ASSIGN_MASK_INTX) {
+ kvm_set_irq(match->kvm, match->irq_source_id,
+ match->guest_irq, 0);
+ /*
+ * Masking at hardware-level is performed on demand,
+ * i.e. when an IRQ actually arrives at the host.
+ */
+ } else if (!(assigned_dev->flags & KVM_DEV_ASSIGN_PCI_2_3)) {
+ /*
+ * Unmask the IRQ line if required. Unmasking at
+ * device level will be performed by user space.
+ */
+ spin_lock_irq(&match->intx_lock);
+ if (match->host_irq_disabled) {
+ enable_irq(match->host_irq);
+ match->host_irq_disabled = false;
+ }
+ spin_unlock_irq(&match->intx_lock);
+ }
+ }
+
+ spin_unlock(&match->intx_mask_lock);
+
+out:
+ mutex_unlock(&kvm->lock);
+ return r;
+}
+
+long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int r;
+
+ 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;
+ }
+ 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;
+ }
+ 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;
+ }
+#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
+ case KVM_ASSIGN_SET_INTX_MASK: {
+ 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_set_pci_irq_mask(kvm, &assigned_dev);
+ break;
+ }
+ default:
+ r = -ENOTTY;
+ break;
+ }
+out:
+ return r;
+}
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/async_pf.c b/ap/os/linux/linux-3.4.x/virt/kvm/async_pf.c
new file mode 100644
index 0000000..74268b4
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/async_pf.c
@@ -0,0 +1,216 @@
+/*
+ * kvm asynchronous fault support
+ *
+ * Copyright 2010 Red Hat, Inc.
+ *
+ * Author:
+ * Gleb Natapov <gleb@redhat.com>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/mmu_context.h>
+
+#include "async_pf.h"
+#include <trace/events/kvm.h>
+
+static struct kmem_cache *async_pf_cache;
+
+int kvm_async_pf_init(void)
+{
+ async_pf_cache = KMEM_CACHE(kvm_async_pf, 0);
+
+ if (!async_pf_cache)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void kvm_async_pf_deinit(void)
+{
+ if (async_pf_cache)
+ kmem_cache_destroy(async_pf_cache);
+ async_pf_cache = NULL;
+}
+
+void kvm_async_pf_vcpu_init(struct kvm_vcpu *vcpu)
+{
+ INIT_LIST_HEAD(&vcpu->async_pf.done);
+ INIT_LIST_HEAD(&vcpu->async_pf.queue);
+ spin_lock_init(&vcpu->async_pf.lock);
+}
+
+static void async_pf_execute(struct work_struct *work)
+{
+ struct page *page = NULL;
+ struct kvm_async_pf *apf =
+ container_of(work, struct kvm_async_pf, work);
+ struct mm_struct *mm = apf->mm;
+ struct kvm_vcpu *vcpu = apf->vcpu;
+ unsigned long addr = apf->addr;
+ gva_t gva = apf->gva;
+
+ might_sleep();
+
+ use_mm(mm);
+ down_read(&mm->mmap_sem);
+ get_user_pages(current, mm, addr, 1, 1, 0, &page, NULL);
+ up_read(&mm->mmap_sem);
+ unuse_mm(mm);
+
+ spin_lock(&vcpu->async_pf.lock);
+ list_add_tail(&apf->link, &vcpu->async_pf.done);
+ apf->page = page;
+ apf->done = true;
+ spin_unlock(&vcpu->async_pf.lock);
+
+ /*
+ * apf may be freed by kvm_check_async_pf_completion() after
+ * this point
+ */
+
+ trace_kvm_async_pf_completed(addr, page, gva);
+
+ if (waitqueue_active(&vcpu->wq))
+ wake_up_interruptible(&vcpu->wq);
+
+ mmdrop(mm);
+ kvm_put_kvm(vcpu->kvm);
+}
+
+void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu)
+{
+ /* cancel outstanding work queue item */
+ while (!list_empty(&vcpu->async_pf.queue)) {
+ struct kvm_async_pf *work =
+ list_entry(vcpu->async_pf.queue.next,
+ typeof(*work), queue);
+ cancel_work_sync(&work->work);
+ list_del(&work->queue);
+ if (!work->done) /* work was canceled */
+ kmem_cache_free(async_pf_cache, work);
+ }
+
+ spin_lock(&vcpu->async_pf.lock);
+ while (!list_empty(&vcpu->async_pf.done)) {
+ struct kvm_async_pf *work =
+ list_entry(vcpu->async_pf.done.next,
+ typeof(*work), link);
+ list_del(&work->link);
+ if (work->page)
+ put_page(work->page);
+ kmem_cache_free(async_pf_cache, work);
+ }
+ spin_unlock(&vcpu->async_pf.lock);
+
+ vcpu->async_pf.queued = 0;
+}
+
+void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu)
+{
+ struct kvm_async_pf *work;
+
+ while (!list_empty_careful(&vcpu->async_pf.done) &&
+ kvm_arch_can_inject_async_page_present(vcpu)) {
+ spin_lock(&vcpu->async_pf.lock);
+ work = list_first_entry(&vcpu->async_pf.done, typeof(*work),
+ link);
+ list_del(&work->link);
+ spin_unlock(&vcpu->async_pf.lock);
+
+ if (work->page)
+ kvm_arch_async_page_ready(vcpu, work);
+ kvm_arch_async_page_present(vcpu, work);
+
+ list_del(&work->queue);
+ vcpu->async_pf.queued--;
+ if (work->page)
+ put_page(work->page);
+ kmem_cache_free(async_pf_cache, work);
+ }
+}
+
+int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
+ struct kvm_arch_async_pf *arch)
+{
+ struct kvm_async_pf *work;
+
+ if (vcpu->async_pf.queued >= ASYNC_PF_PER_VCPU)
+ return 0;
+
+ /* setup delayed work */
+
+ /*
+ * do alloc nowait since if we are going to sleep anyway we
+ * may as well sleep faulting in page
+ */
+ work = kmem_cache_zalloc(async_pf_cache, GFP_NOWAIT);
+ if (!work)
+ return 0;
+
+ work->page = NULL;
+ work->done = false;
+ work->vcpu = vcpu;
+ work->gva = gva;
+ work->addr = gfn_to_hva(vcpu->kvm, gfn);
+ work->arch = *arch;
+ work->mm = current->mm;
+ atomic_inc(&work->mm->mm_count);
+ kvm_get_kvm(work->vcpu->kvm);
+
+ /* this can't really happen otherwise gfn_to_pfn_async
+ would succeed */
+ if (unlikely(kvm_is_error_hva(work->addr)))
+ goto retry_sync;
+
+ INIT_WORK(&work->work, async_pf_execute);
+ if (!schedule_work(&work->work))
+ goto retry_sync;
+
+ list_add_tail(&work->queue, &vcpu->async_pf.queue);
+ vcpu->async_pf.queued++;
+ kvm_arch_async_page_not_present(vcpu, work);
+ return 1;
+retry_sync:
+ kvm_put_kvm(work->vcpu->kvm);
+ mmdrop(work->mm);
+ kmem_cache_free(async_pf_cache, work);
+ return 0;
+}
+
+int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu)
+{
+ struct kvm_async_pf *work;
+
+ if (!list_empty_careful(&vcpu->async_pf.done))
+ return 0;
+
+ work = kmem_cache_zalloc(async_pf_cache, GFP_ATOMIC);
+ if (!work)
+ return -ENOMEM;
+
+ work->page = bad_page;
+ get_page(bad_page);
+ INIT_LIST_HEAD(&work->queue); /* for list_del to work */
+
+ spin_lock(&vcpu->async_pf.lock);
+ list_add_tail(&work->link, &vcpu->async_pf.done);
+ spin_unlock(&vcpu->async_pf.lock);
+
+ vcpu->async_pf.queued++;
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/async_pf.h b/ap/os/linux/linux-3.4.x/virt/kvm/async_pf.h
new file mode 100644
index 0000000..e7ef644
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/async_pf.h
@@ -0,0 +1,36 @@
+/*
+ * kvm asynchronous fault support
+ *
+ * Copyright 2010 Red Hat, Inc.
+ *
+ * Author:
+ * Gleb Natapov <gleb@redhat.com>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __KVM_ASYNC_PF_H__
+#define __KVM_ASYNC_PF_H__
+
+#ifdef CONFIG_KVM_ASYNC_PF
+int kvm_async_pf_init(void);
+void kvm_async_pf_deinit(void);
+void kvm_async_pf_vcpu_init(struct kvm_vcpu *vcpu);
+#else
+#define kvm_async_pf_init() (0)
+#define kvm_async_pf_deinit() do{}while(0)
+#define kvm_async_pf_vcpu_init(C) do{}while(0)
+#endif
+
+#endif
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/coalesced_mmio.c b/ap/os/linux/linux-3.4.x/virt/kvm/coalesced_mmio.c
new file mode 100644
index 0000000..00d8642
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/coalesced_mmio.c
@@ -0,0 +1,182 @@
+/*
+ * KVM coalesced MMIO
+ *
+ * Copyright (c) 2008 Bull S.A.S.
+ * Copyright 2009 Red Hat, Inc. and/or its affiliates.
+ *
+ * Author: Laurent Vivier <Laurent.Vivier@bull.net>
+ *
+ */
+
+#include "iodev.h"
+
+#include <linux/kvm_host.h>
+#include <linux/slab.h>
+#include <linux/kvm.h>
+
+#include "coalesced_mmio.h"
+
+static inline struct kvm_coalesced_mmio_dev *to_mmio(struct kvm_io_device *dev)
+{
+ return container_of(dev, struct kvm_coalesced_mmio_dev, dev);
+}
+
+static int coalesced_mmio_in_range(struct kvm_coalesced_mmio_dev *dev,
+ gpa_t addr, int len)
+{
+ /* is it in a batchable area ?
+ * (addr,len) is fully included in
+ * (zone->addr, zone->size)
+ */
+ if (len < 0)
+ return 0;
+ if (addr + len < addr)
+ return 0;
+ if (addr < dev->zone.addr)
+ return 0;
+ if (addr + len > dev->zone.addr + dev->zone.size)
+ return 0;
+ return 1;
+}
+
+static int coalesced_mmio_has_room(struct kvm_coalesced_mmio_dev *dev)
+{
+ struct kvm_coalesced_mmio_ring *ring;
+ unsigned avail;
+
+ /* Are we able to batch it ? */
+
+ /* last is the first free entry
+ * check if we don't meet the first used entry
+ * there is always one unused entry in the buffer
+ */
+ ring = dev->kvm->coalesced_mmio_ring;
+ avail = (ring->first - ring->last - 1) % KVM_COALESCED_MMIO_MAX;
+ if (avail == 0) {
+ /* full */
+ return 0;
+ }
+
+ return 1;
+}
+
+static int coalesced_mmio_write(struct kvm_io_device *this,
+ gpa_t addr, int len, const void *val)
+{
+ struct kvm_coalesced_mmio_dev *dev = to_mmio(this);
+ struct kvm_coalesced_mmio_ring *ring = dev->kvm->coalesced_mmio_ring;
+
+ if (!coalesced_mmio_in_range(dev, addr, len))
+ return -EOPNOTSUPP;
+
+ spin_lock(&dev->kvm->ring_lock);
+
+ if (!coalesced_mmio_has_room(dev)) {
+ spin_unlock(&dev->kvm->ring_lock);
+ return -EOPNOTSUPP;
+ }
+
+ /* copy data in first free entry of the ring */
+
+ ring->coalesced_mmio[ring->last].phys_addr = addr;
+ ring->coalesced_mmio[ring->last].len = len;
+ memcpy(ring->coalesced_mmio[ring->last].data, val, len);
+ smp_wmb();
+ ring->last = (ring->last + 1) % KVM_COALESCED_MMIO_MAX;
+ spin_unlock(&dev->kvm->ring_lock);
+ return 0;
+}
+
+static void coalesced_mmio_destructor(struct kvm_io_device *this)
+{
+ struct kvm_coalesced_mmio_dev *dev = to_mmio(this);
+
+ list_del(&dev->list);
+
+ kfree(dev);
+}
+
+static const struct kvm_io_device_ops coalesced_mmio_ops = {
+ .write = coalesced_mmio_write,
+ .destructor = coalesced_mmio_destructor,
+};
+
+int kvm_coalesced_mmio_init(struct kvm *kvm)
+{
+ struct page *page;
+ int ret;
+
+ ret = -ENOMEM;
+ page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (!page)
+ goto out_err;
+
+ ret = 0;
+ kvm->coalesced_mmio_ring = page_address(page);
+
+ /*
+ * We're using this spinlock to sync access to the coalesced ring.
+ * The list doesn't need it's own lock since device registration and
+ * unregistration should only happen when kvm->slots_lock is held.
+ */
+ spin_lock_init(&kvm->ring_lock);
+ INIT_LIST_HEAD(&kvm->coalesced_zones);
+
+out_err:
+ return ret;
+}
+
+void kvm_coalesced_mmio_free(struct kvm *kvm)
+{
+ if (kvm->coalesced_mmio_ring)
+ free_page((unsigned long)kvm->coalesced_mmio_ring);
+}
+
+int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm,
+ struct kvm_coalesced_mmio_zone *zone)
+{
+ int ret;
+ struct kvm_coalesced_mmio_dev *dev;
+
+ dev = kzalloc(sizeof(struct kvm_coalesced_mmio_dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ kvm_iodevice_init(&dev->dev, &coalesced_mmio_ops);
+ dev->kvm = kvm;
+ dev->zone = *zone;
+
+ mutex_lock(&kvm->slots_lock);
+ ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, zone->addr,
+ zone->size, &dev->dev);
+ if (ret < 0)
+ goto out_free_dev;
+ list_add_tail(&dev->list, &kvm->coalesced_zones);
+ mutex_unlock(&kvm->slots_lock);
+
+ return 0;
+
+out_free_dev:
+ mutex_unlock(&kvm->slots_lock);
+ kfree(dev);
+
+ return ret;
+}
+
+int kvm_vm_ioctl_unregister_coalesced_mmio(struct kvm *kvm,
+ struct kvm_coalesced_mmio_zone *zone)
+{
+ struct kvm_coalesced_mmio_dev *dev, *tmp;
+
+ mutex_lock(&kvm->slots_lock);
+
+ list_for_each_entry_safe(dev, tmp, &kvm->coalesced_zones, list)
+ if (coalesced_mmio_in_range(dev, zone->addr, zone->size)) {
+ kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &dev->dev);
+ kvm_iodevice_destructor(&dev->dev);
+ }
+
+ mutex_unlock(&kvm->slots_lock);
+
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/coalesced_mmio.h b/ap/os/linux/linux-3.4.x/virt/kvm/coalesced_mmio.h
new file mode 100644
index 0000000..b280c20
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/coalesced_mmio.h
@@ -0,0 +1,38 @@
+#ifndef __KVM_COALESCED_MMIO_H__
+#define __KVM_COALESCED_MMIO_H__
+
+/*
+ * KVM coalesced MMIO
+ *
+ * Copyright (c) 2008 Bull S.A.S.
+ *
+ * Author: Laurent Vivier <Laurent.Vivier@bull.net>
+ *
+ */
+
+#ifdef CONFIG_KVM_MMIO
+
+#include <linux/list.h>
+
+struct kvm_coalesced_mmio_dev {
+ struct list_head list;
+ struct kvm_io_device dev;
+ struct kvm *kvm;
+ struct kvm_coalesced_mmio_zone zone;
+};
+
+int kvm_coalesced_mmio_init(struct kvm *kvm);
+void kvm_coalesced_mmio_free(struct kvm *kvm);
+int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm,
+ struct kvm_coalesced_mmio_zone *zone);
+int kvm_vm_ioctl_unregister_coalesced_mmio(struct kvm *kvm,
+ struct kvm_coalesced_mmio_zone *zone);
+
+#else
+
+static inline int kvm_coalesced_mmio_init(struct kvm *kvm) { return 0; }
+static inline void kvm_coalesced_mmio_free(struct kvm *kvm) { }
+
+#endif
+
+#endif
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/eventfd.c b/ap/os/linux/linux-3.4.x/virt/kvm/eventfd.c
new file mode 100644
index 0000000..f59c1e8
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/eventfd.c
@@ -0,0 +1,657 @@
+/*
+ * kvm eventfd support - use eventfd objects to signal various KVM events
+ *
+ * Copyright 2009 Novell. All Rights Reserved.
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ *
+ * Author:
+ * Gregory Haskins <ghaskins@novell.com>
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/kvm.h>
+#include <linux/workqueue.h>
+#include <linux/syscalls.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
+#include <linux/file.h>
+#include <linux/list.h>
+#include <linux/eventfd.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include "iodev.h"
+
+/*
+ * --------------------------------------------------------------------
+ * irqfd: Allows an fd to be used to inject an interrupt to the guest
+ *
+ * Credit goes to Avi Kivity for the original idea.
+ * --------------------------------------------------------------------
+ */
+
+struct _irqfd {
+ /* Used for MSI fast-path */
+ struct kvm *kvm;
+ wait_queue_t wait;
+ /* Update side is protected by irqfds.lock */
+ struct kvm_kernel_irq_routing_entry __rcu *irq_entry;
+ /* Used for level IRQ fast-path */
+ int gsi;
+ struct work_struct inject;
+ /* Used for setup/shutdown */
+ struct eventfd_ctx *eventfd;
+ struct list_head list;
+ poll_table pt;
+ struct work_struct shutdown;
+};
+
+static struct workqueue_struct *irqfd_cleanup_wq;
+
+static void
+irqfd_inject(struct work_struct *work)
+{
+ struct _irqfd *irqfd = container_of(work, struct _irqfd, inject);
+ struct kvm *kvm = irqfd->kvm;
+
+ kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 1);
+ kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 0);
+}
+
+/*
+ * Race-free decouple logic (ordering is critical)
+ */
+static void
+irqfd_shutdown(struct work_struct *work)
+{
+ struct _irqfd *irqfd = container_of(work, struct _irqfd, shutdown);
+ u64 cnt;
+
+ /*
+ * Synchronize with the wait-queue and unhook ourselves to prevent
+ * further events.
+ */
+ eventfd_ctx_remove_wait_queue(irqfd->eventfd, &irqfd->wait, &cnt);
+
+ /*
+ * We know no new events will be scheduled at this point, so block
+ * until all previously outstanding events have completed
+ */
+ flush_work_sync(&irqfd->inject);
+
+ /*
+ * It is now safe to release the object's resources
+ */
+ eventfd_ctx_put(irqfd->eventfd);
+ kfree(irqfd);
+}
+
+
+/* assumes kvm->irqfds.lock is held */
+static bool
+irqfd_is_active(struct _irqfd *irqfd)
+{
+ return list_empty(&irqfd->list) ? false : true;
+}
+
+/*
+ * Mark the irqfd as inactive and schedule it for removal
+ *
+ * assumes kvm->irqfds.lock is held
+ */
+static void
+irqfd_deactivate(struct _irqfd *irqfd)
+{
+ BUG_ON(!irqfd_is_active(irqfd));
+
+ list_del_init(&irqfd->list);
+
+ queue_work(irqfd_cleanup_wq, &irqfd->shutdown);
+}
+
+/*
+ * Called with wqh->lock held and interrupts disabled
+ */
+static int
+irqfd_wakeup(wait_queue_t *wait, unsigned mode, int sync, void *key)
+{
+ struct _irqfd *irqfd = container_of(wait, struct _irqfd, wait);
+ unsigned long flags = (unsigned long)key;
+ struct kvm_kernel_irq_routing_entry *irq;
+ struct kvm *kvm = irqfd->kvm;
+
+ if (flags & POLLIN) {
+ rcu_read_lock();
+ irq = rcu_dereference(irqfd->irq_entry);
+ /* An event has been signaled, inject an interrupt */
+ if (irq)
+ kvm_set_msi(irq, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1);
+ else
+ schedule_work(&irqfd->inject);
+ rcu_read_unlock();
+ }
+
+ if (flags & POLLHUP) {
+ /* The eventfd is closing, detach from KVM */
+ unsigned long flags;
+
+ spin_lock_irqsave(&kvm->irqfds.lock, flags);
+
+ /*
+ * We must check if someone deactivated the irqfd before
+ * we could acquire the irqfds.lock since the item is
+ * deactivated from the KVM side before it is unhooked from
+ * the wait-queue. If it is already deactivated, we can
+ * simply return knowing the other side will cleanup for us.
+ * We cannot race against the irqfd going away since the
+ * other side is required to acquire wqh->lock, which we hold
+ */
+ if (irqfd_is_active(irqfd))
+ irqfd_deactivate(irqfd);
+
+ spin_unlock_irqrestore(&kvm->irqfds.lock, flags);
+ }
+
+ return 0;
+}
+
+static void
+irqfd_ptable_queue_proc(struct file *file, wait_queue_head_t *wqh,
+ poll_table *pt)
+{
+ struct _irqfd *irqfd = container_of(pt, struct _irqfd, pt);
+ add_wait_queue(wqh, &irqfd->wait);
+}
+
+/* Must be called under irqfds.lock */
+static void irqfd_update(struct kvm *kvm, struct _irqfd *irqfd,
+ struct kvm_irq_routing_table *irq_rt)
+{
+ struct kvm_kernel_irq_routing_entry *e;
+ struct hlist_node *n;
+
+ if (irqfd->gsi >= irq_rt->nr_rt_entries) {
+ rcu_assign_pointer(irqfd->irq_entry, NULL);
+ return;
+ }
+
+ hlist_for_each_entry(e, n, &irq_rt->map[irqfd->gsi], link) {
+ /* Only fast-path MSI. */
+ if (e->type == KVM_IRQ_ROUTING_MSI)
+ rcu_assign_pointer(irqfd->irq_entry, e);
+ else
+ rcu_assign_pointer(irqfd->irq_entry, NULL);
+ }
+}
+
+static int
+kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
+{
+ struct kvm_irq_routing_table *irq_rt;
+ struct _irqfd *irqfd, *tmp;
+ struct file *file = NULL;
+ struct eventfd_ctx *eventfd = NULL;
+ int ret;
+ unsigned int events;
+
+ irqfd = kzalloc(sizeof(*irqfd), GFP_KERNEL);
+ if (!irqfd)
+ return -ENOMEM;
+
+ irqfd->kvm = kvm;
+ irqfd->gsi = gsi;
+ INIT_LIST_HEAD(&irqfd->list);
+ INIT_WORK(&irqfd->inject, irqfd_inject);
+ INIT_WORK(&irqfd->shutdown, irqfd_shutdown);
+
+ file = eventfd_fget(fd);
+ if (IS_ERR(file)) {
+ ret = PTR_ERR(file);
+ goto fail;
+ }
+
+ eventfd = eventfd_ctx_fileget(file);
+ if (IS_ERR(eventfd)) {
+ ret = PTR_ERR(eventfd);
+ goto fail;
+ }
+
+ irqfd->eventfd = eventfd;
+
+ /*
+ * Install our own custom wake-up handling so we are notified via
+ * a callback whenever someone signals the underlying eventfd
+ */
+ init_waitqueue_func_entry(&irqfd->wait, irqfd_wakeup);
+ init_poll_funcptr(&irqfd->pt, irqfd_ptable_queue_proc);
+
+ spin_lock_irq(&kvm->irqfds.lock);
+
+ ret = 0;
+ list_for_each_entry(tmp, &kvm->irqfds.items, list) {
+ if (irqfd->eventfd != tmp->eventfd)
+ continue;
+ /* This fd is used for another irq already. */
+ ret = -EBUSY;
+ spin_unlock_irq(&kvm->irqfds.lock);
+ goto fail;
+ }
+
+ irq_rt = rcu_dereference_protected(kvm->irq_routing,
+ lockdep_is_held(&kvm->irqfds.lock));
+ irqfd_update(kvm, irqfd, irq_rt);
+
+ events = file->f_op->poll(file, &irqfd->pt);
+
+ list_add_tail(&irqfd->list, &kvm->irqfds.items);
+
+ /*
+ * Check if there was an event already pending on the eventfd
+ * before we registered, and trigger it as if we didn't miss it.
+ */
+ if (events & POLLIN)
+ schedule_work(&irqfd->inject);
+
+ spin_unlock_irq(&kvm->irqfds.lock);
+
+ /*
+ * do not drop the file until the irqfd is fully initialized, otherwise
+ * we might race against the POLLHUP
+ */
+ fput(file);
+
+ return 0;
+
+fail:
+ if (eventfd && !IS_ERR(eventfd))
+ eventfd_ctx_put(eventfd);
+
+ if (!IS_ERR(file))
+ fput(file);
+
+ kfree(irqfd);
+ return ret;
+}
+
+void
+kvm_eventfd_init(struct kvm *kvm)
+{
+ spin_lock_init(&kvm->irqfds.lock);
+ INIT_LIST_HEAD(&kvm->irqfds.items);
+ INIT_LIST_HEAD(&kvm->ioeventfds);
+}
+
+/*
+ * shutdown any irqfd's that match fd+gsi
+ */
+static int
+kvm_irqfd_deassign(struct kvm *kvm, int fd, int gsi)
+{
+ struct _irqfd *irqfd, *tmp;
+ struct eventfd_ctx *eventfd;
+
+ eventfd = eventfd_ctx_fdget(fd);
+ if (IS_ERR(eventfd))
+ return PTR_ERR(eventfd);
+
+ spin_lock_irq(&kvm->irqfds.lock);
+
+ list_for_each_entry_safe(irqfd, tmp, &kvm->irqfds.items, list) {
+ if (irqfd->eventfd == eventfd && irqfd->gsi == gsi) {
+ /*
+ * This rcu_assign_pointer is needed for when
+ * another thread calls kvm_irq_routing_update before
+ * we flush workqueue below (we synchronize with
+ * kvm_irq_routing_update using irqfds.lock).
+ * It is paired with synchronize_rcu done by caller
+ * of that function.
+ */
+ rcu_assign_pointer(irqfd->irq_entry, NULL);
+ irqfd_deactivate(irqfd);
+ }
+ }
+
+ spin_unlock_irq(&kvm->irqfds.lock);
+ eventfd_ctx_put(eventfd);
+
+ /*
+ * Block until we know all outstanding shutdown jobs have completed
+ * so that we guarantee there will not be any more interrupts on this
+ * gsi once this deassign function returns.
+ */
+ flush_workqueue(irqfd_cleanup_wq);
+
+ return 0;
+}
+
+int
+kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
+{
+ if (flags & KVM_IRQFD_FLAG_DEASSIGN)
+ return kvm_irqfd_deassign(kvm, fd, gsi);
+
+ return kvm_irqfd_assign(kvm, fd, gsi);
+}
+
+/*
+ * This function is called as the kvm VM fd is being released. Shutdown all
+ * irqfds that still remain open
+ */
+void
+kvm_irqfd_release(struct kvm *kvm)
+{
+ struct _irqfd *irqfd, *tmp;
+
+ spin_lock_irq(&kvm->irqfds.lock);
+
+ list_for_each_entry_safe(irqfd, tmp, &kvm->irqfds.items, list)
+ irqfd_deactivate(irqfd);
+
+ spin_unlock_irq(&kvm->irqfds.lock);
+
+ /*
+ * Block until we know all outstanding shutdown jobs have completed
+ * since we do not take a kvm* reference.
+ */
+ flush_workqueue(irqfd_cleanup_wq);
+
+}
+
+/*
+ * Change irq_routing and irqfd.
+ * Caller must invoke synchronize_rcu afterwards.
+ */
+void kvm_irq_routing_update(struct kvm *kvm,
+ struct kvm_irq_routing_table *irq_rt)
+{
+ struct _irqfd *irqfd;
+
+ spin_lock_irq(&kvm->irqfds.lock);
+
+ rcu_assign_pointer(kvm->irq_routing, irq_rt);
+
+ list_for_each_entry(irqfd, &kvm->irqfds.items, list)
+ irqfd_update(kvm, irqfd, irq_rt);
+
+ spin_unlock_irq(&kvm->irqfds.lock);
+}
+
+/*
+ * create a host-wide workqueue for issuing deferred shutdown requests
+ * aggregated from all vm* instances. We need our own isolated single-thread
+ * queue to prevent deadlock against flushing the normal work-queue.
+ */
+static int __init irqfd_module_init(void)
+{
+ irqfd_cleanup_wq = create_singlethread_workqueue("kvm-irqfd-cleanup");
+ if (!irqfd_cleanup_wq)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void __exit irqfd_module_exit(void)
+{
+ destroy_workqueue(irqfd_cleanup_wq);
+}
+
+module_init(irqfd_module_init);
+module_exit(irqfd_module_exit);
+
+/*
+ * --------------------------------------------------------------------
+ * ioeventfd: translate a PIO/MMIO memory write to an eventfd signal.
+ *
+ * userspace can register a PIO/MMIO address with an eventfd for receiving
+ * notification when the memory has been touched.
+ * --------------------------------------------------------------------
+ */
+
+struct _ioeventfd {
+ struct list_head list;
+ u64 addr;
+ int length;
+ struct eventfd_ctx *eventfd;
+ u64 datamatch;
+ struct kvm_io_device dev;
+ bool wildcard;
+};
+
+static inline struct _ioeventfd *
+to_ioeventfd(struct kvm_io_device *dev)
+{
+ return container_of(dev, struct _ioeventfd, dev);
+}
+
+static void
+ioeventfd_release(struct _ioeventfd *p)
+{
+ eventfd_ctx_put(p->eventfd);
+ list_del(&p->list);
+ kfree(p);
+}
+
+static bool
+ioeventfd_in_range(struct _ioeventfd *p, gpa_t addr, int len, const void *val)
+{
+ u64 _val;
+
+ if (!(addr == p->addr && len == p->length))
+ /* address-range must be precise for a hit */
+ return false;
+
+ if (p->wildcard)
+ /* all else equal, wildcard is always a hit */
+ return true;
+
+ /* otherwise, we have to actually compare the data */
+
+ BUG_ON(!IS_ALIGNED((unsigned long)val, len));
+
+ switch (len) {
+ case 1:
+ _val = *(u8 *)val;
+ break;
+ case 2:
+ _val = *(u16 *)val;
+ break;
+ case 4:
+ _val = *(u32 *)val;
+ break;
+ case 8:
+ _val = *(u64 *)val;
+ break;
+ default:
+ return false;
+ }
+
+ return _val == p->datamatch ? true : false;
+}
+
+/* MMIO/PIO writes trigger an event if the addr/val match */
+static int
+ioeventfd_write(struct kvm_io_device *this, gpa_t addr, int len,
+ const void *val)
+{
+ struct _ioeventfd *p = to_ioeventfd(this);
+
+ if (!ioeventfd_in_range(p, addr, len, val))
+ return -EOPNOTSUPP;
+
+ eventfd_signal(p->eventfd, 1);
+ return 0;
+}
+
+/*
+ * This function is called as KVM is completely shutting down. We do not
+ * need to worry about locking just nuke anything we have as quickly as possible
+ */
+static void
+ioeventfd_destructor(struct kvm_io_device *this)
+{
+ struct _ioeventfd *p = to_ioeventfd(this);
+
+ ioeventfd_release(p);
+}
+
+static const struct kvm_io_device_ops ioeventfd_ops = {
+ .write = ioeventfd_write,
+ .destructor = ioeventfd_destructor,
+};
+
+/* assumes kvm->slots_lock held */
+static bool
+ioeventfd_check_collision(struct kvm *kvm, struct _ioeventfd *p)
+{
+ struct _ioeventfd *_p;
+
+ list_for_each_entry(_p, &kvm->ioeventfds, list)
+ if (_p->addr == p->addr && _p->length == p->length &&
+ (_p->wildcard || p->wildcard ||
+ _p->datamatch == p->datamatch))
+ return true;
+
+ return false;
+}
+
+static int
+kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
+{
+ int pio = args->flags & KVM_IOEVENTFD_FLAG_PIO;
+ enum kvm_bus bus_idx = pio ? KVM_PIO_BUS : KVM_MMIO_BUS;
+ struct _ioeventfd *p;
+ struct eventfd_ctx *eventfd;
+ int ret;
+
+ /* must be natural-word sized */
+ switch (args->len) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* check for range overflow */
+ if (args->addr + args->len < args->addr)
+ return -EINVAL;
+
+ /* check for extra flags that we don't understand */
+ if (args->flags & ~KVM_IOEVENTFD_VALID_FLAG_MASK)
+ return -EINVAL;
+
+ eventfd = eventfd_ctx_fdget(args->fd);
+ if (IS_ERR(eventfd))
+ return PTR_ERR(eventfd);
+
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ INIT_LIST_HEAD(&p->list);
+ p->addr = args->addr;
+ p->length = args->len;
+ p->eventfd = eventfd;
+
+ /* The datamatch feature is optional, otherwise this is a wildcard */
+ if (args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH)
+ p->datamatch = args->datamatch;
+ else
+ p->wildcard = true;
+
+ mutex_lock(&kvm->slots_lock);
+
+ /* Verify that there isn't a match already */
+ if (ioeventfd_check_collision(kvm, p)) {
+ ret = -EEXIST;
+ goto unlock_fail;
+ }
+
+ kvm_iodevice_init(&p->dev, &ioeventfd_ops);
+
+ ret = kvm_io_bus_register_dev(kvm, bus_idx, p->addr, p->length,
+ &p->dev);
+ if (ret < 0)
+ goto unlock_fail;
+
+ list_add_tail(&p->list, &kvm->ioeventfds);
+
+ mutex_unlock(&kvm->slots_lock);
+
+ return 0;
+
+unlock_fail:
+ mutex_unlock(&kvm->slots_lock);
+
+fail:
+ kfree(p);
+ eventfd_ctx_put(eventfd);
+
+ return ret;
+}
+
+static int
+kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
+{
+ int pio = args->flags & KVM_IOEVENTFD_FLAG_PIO;
+ enum kvm_bus bus_idx = pio ? KVM_PIO_BUS : KVM_MMIO_BUS;
+ struct _ioeventfd *p, *tmp;
+ struct eventfd_ctx *eventfd;
+ int ret = -ENOENT;
+
+ eventfd = eventfd_ctx_fdget(args->fd);
+ if (IS_ERR(eventfd))
+ return PTR_ERR(eventfd);
+
+ mutex_lock(&kvm->slots_lock);
+
+ list_for_each_entry_safe(p, tmp, &kvm->ioeventfds, list) {
+ bool wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH);
+
+ if (p->eventfd != eventfd ||
+ p->addr != args->addr ||
+ p->length != args->len ||
+ p->wildcard != wildcard)
+ continue;
+
+ if (!p->wildcard && p->datamatch != args->datamatch)
+ continue;
+
+ kvm_io_bus_unregister_dev(kvm, bus_idx, &p->dev);
+ ioeventfd_release(p);
+ ret = 0;
+ break;
+ }
+
+ mutex_unlock(&kvm->slots_lock);
+
+ eventfd_ctx_put(eventfd);
+
+ return ret;
+}
+
+int
+kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
+{
+ if (args->flags & KVM_IOEVENTFD_FLAG_DEASSIGN)
+ return kvm_deassign_ioeventfd(kvm, args);
+
+ return kvm_assign_ioeventfd(kvm, args);
+}
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/ioapic.c b/ap/os/linux/linux-3.4.x/virt/kvm/ioapic.c
new file mode 100644
index 0000000..9f477f6
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/ioapic.c
@@ -0,0 +1,454 @@
+/*
+ * Copyright (C) 2001 MandrakeSoft S.A.
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ *
+ * MandrakeSoft S.A.
+ * 43, rue d'Aboukir
+ * 75002 Paris - France
+ * http://www.linux-mandrake.com/
+ * http://www.mandrakesoft.com/
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Yunhong Jiang <yunhong.jiang@intel.com>
+ * Yaozu (Eddie) Dong <eddie.dong@intel.com>
+ * Based on Xen 3.1 code.
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/kvm.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/smp.h>
+#include <linux/hrtimer.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/current.h>
+#include <trace/events/kvm.h>
+
+#include "ioapic.h"
+#include "lapic.h"
+#include "irq.h"
+
+#if 0
+#define ioapic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg)
+#else
+#define ioapic_debug(fmt, arg...)
+#endif
+static int ioapic_deliver(struct kvm_ioapic *vioapic, int irq);
+
+static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic,
+ unsigned long addr,
+ unsigned long length)
+{
+ unsigned long result = 0;
+
+ switch (ioapic->ioregsel) {
+ case IOAPIC_REG_VERSION:
+ result = ((((IOAPIC_NUM_PINS - 1) & 0xff) << 16)
+ | (IOAPIC_VERSION_ID & 0xff));
+ break;
+
+ case IOAPIC_REG_APIC_ID:
+ case IOAPIC_REG_ARB_ID:
+ result = ((ioapic->id & 0xf) << 24);
+ break;
+
+ default:
+ {
+ u32 redir_index = (ioapic->ioregsel - 0x10) >> 1;
+ u64 redir_content;
+
+ if (redir_index < IOAPIC_NUM_PINS)
+ redir_content =
+ ioapic->redirtbl[redir_index].bits;
+ else
+ redir_content = ~0ULL;
+
+ result = (ioapic->ioregsel & 0x1) ?
+ (redir_content >> 32) & 0xffffffff :
+ redir_content & 0xffffffff;
+ break;
+ }
+ }
+
+ return result;
+}
+
+static int ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx)
+{
+ union kvm_ioapic_redirect_entry *pent;
+ int injected = -1;
+
+ pent = &ioapic->redirtbl[idx];
+
+ if (!pent->fields.mask) {
+ injected = ioapic_deliver(ioapic, idx);
+ if (injected && pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
+ pent->fields.remote_irr = 1;
+ }
+
+ return injected;
+}
+
+static void update_handled_vectors(struct kvm_ioapic *ioapic)
+{
+ DECLARE_BITMAP(handled_vectors, 256);
+ int i;
+
+ memset(handled_vectors, 0, sizeof(handled_vectors));
+ for (i = 0; i < IOAPIC_NUM_PINS; ++i)
+ __set_bit(ioapic->redirtbl[i].fields.vector, handled_vectors);
+ memcpy(ioapic->handled_vectors, handled_vectors,
+ sizeof(handled_vectors));
+ smp_wmb();
+}
+
+static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
+{
+ unsigned index;
+ bool mask_before, mask_after;
+ union kvm_ioapic_redirect_entry *e;
+
+ switch (ioapic->ioregsel) {
+ case IOAPIC_REG_VERSION:
+ /* Writes are ignored. */
+ break;
+
+ case IOAPIC_REG_APIC_ID:
+ ioapic->id = (val >> 24) & 0xf;
+ break;
+
+ case IOAPIC_REG_ARB_ID:
+ break;
+
+ default:
+ index = (ioapic->ioregsel - 0x10) >> 1;
+
+ ioapic_debug("change redir index %x val %x\n", index, val);
+ if (index >= IOAPIC_NUM_PINS)
+ return;
+ e = &ioapic->redirtbl[index];
+ mask_before = e->fields.mask;
+ if (ioapic->ioregsel & 1) {
+ e->bits &= 0xffffffff;
+ e->bits |= (u64) val << 32;
+ } else {
+ e->bits &= ~0xffffffffULL;
+ e->bits |= (u32) val;
+ e->fields.remote_irr = 0;
+ }
+ update_handled_vectors(ioapic);
+ mask_after = e->fields.mask;
+ if (mask_before != mask_after)
+ kvm_fire_mask_notifiers(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index, mask_after);
+ if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG
+ && ioapic->irr & (1 << index))
+ ioapic_service(ioapic, index);
+ break;
+ }
+}
+
+static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
+{
+ union kvm_ioapic_redirect_entry *entry = &ioapic->redirtbl[irq];
+ struct kvm_lapic_irq irqe;
+
+ ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
+ "vector=%x trig_mode=%x\n",
+ entry->fields.dest_id, entry->fields.dest_mode,
+ entry->fields.delivery_mode, entry->fields.vector,
+ entry->fields.trig_mode);
+
+ irqe.dest_id = entry->fields.dest_id;
+ irqe.vector = entry->fields.vector;
+ irqe.dest_mode = entry->fields.dest_mode;
+ irqe.trig_mode = entry->fields.trig_mode;
+ irqe.delivery_mode = entry->fields.delivery_mode << 8;
+ irqe.level = 1;
+ irqe.shorthand = 0;
+
+#ifdef CONFIG_X86
+ /* Always delivery PIT interrupt to vcpu 0 */
+ if (irq == 0) {
+ irqe.dest_mode = 0; /* Physical mode. */
+ /* need to read apic_id from apic regiest since
+ * it can be rewritten */
+ irqe.dest_id = ioapic->kvm->bsp_vcpu_id;
+ }
+#endif
+ return kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe);
+}
+
+int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
+{
+ u32 old_irr;
+ u32 mask = 1 << irq;
+ union kvm_ioapic_redirect_entry entry;
+ int ret = 1;
+
+ spin_lock(&ioapic->lock);
+ old_irr = ioapic->irr;
+ if (irq >= 0 && irq < IOAPIC_NUM_PINS) {
+ entry = ioapic->redirtbl[irq];
+ level ^= entry.fields.polarity;
+ if (!level)
+ ioapic->irr &= ~mask;
+ else {
+ int edge = (entry.fields.trig_mode == IOAPIC_EDGE_TRIG);
+ ioapic->irr |= mask;
+ if ((edge && old_irr != ioapic->irr) ||
+ (!edge && !entry.fields.remote_irr))
+ ret = ioapic_service(ioapic, irq);
+ else
+ ret = 0; /* report coalesced interrupt */
+ }
+ trace_kvm_ioapic_set_irq(entry.bits, irq, ret == 0);
+ }
+ spin_unlock(&ioapic->lock);
+
+ return ret;
+}
+
+static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int vector,
+ int trigger_mode)
+{
+ int i;
+
+ for (i = 0; i < IOAPIC_NUM_PINS; i++) {
+ union kvm_ioapic_redirect_entry *ent = &ioapic->redirtbl[i];
+
+ if (ent->fields.vector != vector)
+ continue;
+
+ /*
+ * We are dropping lock while calling ack notifiers because ack
+ * notifier callbacks for assigned devices call into IOAPIC
+ * recursively. Since remote_irr is cleared only after call
+ * to notifiers if the same vector will be delivered while lock
+ * is dropped it will be put into irr and will be delivered
+ * after ack notifier returns.
+ */
+ spin_unlock(&ioapic->lock);
+ kvm_notify_acked_irq(ioapic->kvm, KVM_IRQCHIP_IOAPIC, i);
+ spin_lock(&ioapic->lock);
+
+ if (trigger_mode != IOAPIC_LEVEL_TRIG)
+ continue;
+
+ ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG);
+ ent->fields.remote_irr = 0;
+ if (!ent->fields.mask && (ioapic->irr & (1 << i)))
+ ioapic_service(ioapic, i);
+ }
+}
+
+void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode)
+{
+ struct kvm_ioapic *ioapic = kvm->arch.vioapic;
+
+ smp_rmb();
+ if (!test_bit(vector, ioapic->handled_vectors))
+ return;
+ spin_lock(&ioapic->lock);
+ __kvm_ioapic_update_eoi(ioapic, vector, trigger_mode);
+ spin_unlock(&ioapic->lock);
+}
+
+static inline struct kvm_ioapic *to_ioapic(struct kvm_io_device *dev)
+{
+ return container_of(dev, struct kvm_ioapic, dev);
+}
+
+static inline int ioapic_in_range(struct kvm_ioapic *ioapic, gpa_t addr)
+{
+ return ((addr >= ioapic->base_address &&
+ (addr < ioapic->base_address + IOAPIC_MEM_LENGTH)));
+}
+
+static int ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len,
+ void *val)
+{
+ struct kvm_ioapic *ioapic = to_ioapic(this);
+ u32 result;
+ if (!ioapic_in_range(ioapic, addr))
+ return -EOPNOTSUPP;
+
+ ioapic_debug("addr %lx\n", (unsigned long)addr);
+ ASSERT(!(addr & 0xf)); /* check alignment */
+
+ addr &= 0xff;
+ spin_lock(&ioapic->lock);
+ switch (addr) {
+ case IOAPIC_REG_SELECT:
+ result = ioapic->ioregsel;
+ break;
+
+ case IOAPIC_REG_WINDOW:
+ result = ioapic_read_indirect(ioapic, addr, len);
+ break;
+
+ default:
+ result = 0;
+ break;
+ }
+ spin_unlock(&ioapic->lock);
+
+ switch (len) {
+ case 8:
+ *(u64 *) val = result;
+ break;
+ case 1:
+ case 2:
+ case 4:
+ memcpy(val, (char *)&result, len);
+ break;
+ default:
+ printk(KERN_WARNING "ioapic: wrong length %d\n", len);
+ }
+ return 0;
+}
+
+static int ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len,
+ const void *val)
+{
+ struct kvm_ioapic *ioapic = to_ioapic(this);
+ u32 data;
+ if (!ioapic_in_range(ioapic, addr))
+ return -EOPNOTSUPP;
+
+ ioapic_debug("ioapic_mmio_write addr=%p len=%d val=%p\n",
+ (void*)addr, len, val);
+ ASSERT(!(addr & 0xf)); /* check alignment */
+
+ switch (len) {
+ case 8:
+ case 4:
+ data = *(u32 *) val;
+ break;
+ case 2:
+ data = *(u16 *) val;
+ break;
+ case 1:
+ data = *(u8 *) val;
+ break;
+ default:
+ printk(KERN_WARNING "ioapic: Unsupported size %d\n", len);
+ return 0;
+ }
+
+ addr &= 0xff;
+ spin_lock(&ioapic->lock);
+ switch (addr) {
+ case IOAPIC_REG_SELECT:
+ ioapic->ioregsel = data & 0xFF; /* 8-bit register */
+ break;
+
+ case IOAPIC_REG_WINDOW:
+ ioapic_write_indirect(ioapic, data);
+ break;
+#ifdef CONFIG_IA64
+ case IOAPIC_REG_EOI:
+ __kvm_ioapic_update_eoi(ioapic, data, IOAPIC_LEVEL_TRIG);
+ break;
+#endif
+
+ default:
+ break;
+ }
+ spin_unlock(&ioapic->lock);
+ return 0;
+}
+
+void kvm_ioapic_reset(struct kvm_ioapic *ioapic)
+{
+ int i;
+
+ for (i = 0; i < IOAPIC_NUM_PINS; i++)
+ ioapic->redirtbl[i].fields.mask = 1;
+ ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS;
+ ioapic->ioregsel = 0;
+ ioapic->irr = 0;
+ ioapic->id = 0;
+ update_handled_vectors(ioapic);
+}
+
+static const struct kvm_io_device_ops ioapic_mmio_ops = {
+ .read = ioapic_mmio_read,
+ .write = ioapic_mmio_write,
+};
+
+int kvm_ioapic_init(struct kvm *kvm)
+{
+ struct kvm_ioapic *ioapic;
+ int ret;
+
+ ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL);
+ if (!ioapic)
+ return -ENOMEM;
+ spin_lock_init(&ioapic->lock);
+ kvm->arch.vioapic = ioapic;
+ kvm_ioapic_reset(ioapic);
+ kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops);
+ ioapic->kvm = kvm;
+ mutex_lock(&kvm->slots_lock);
+ ret = kvm_io_bus_register_dev(kvm, KVM_MMIO_BUS, ioapic->base_address,
+ IOAPIC_MEM_LENGTH, &ioapic->dev);
+ mutex_unlock(&kvm->slots_lock);
+ if (ret < 0) {
+ kvm->arch.vioapic = NULL;
+ kfree(ioapic);
+ }
+
+ return ret;
+}
+
+void kvm_ioapic_destroy(struct kvm *kvm)
+{
+ struct kvm_ioapic *ioapic = kvm->arch.vioapic;
+
+ if (ioapic) {
+ kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev);
+ kvm->arch.vioapic = NULL;
+ kfree(ioapic);
+ }
+}
+
+int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state)
+{
+ struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
+ if (!ioapic)
+ return -EINVAL;
+
+ spin_lock(&ioapic->lock);
+ memcpy(state, ioapic, sizeof(struct kvm_ioapic_state));
+ spin_unlock(&ioapic->lock);
+ return 0;
+}
+
+int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state)
+{
+ struct kvm_ioapic *ioapic = ioapic_irqchip(kvm);
+ if (!ioapic)
+ return -EINVAL;
+
+ spin_lock(&ioapic->lock);
+ memcpy(ioapic, state, sizeof(struct kvm_ioapic_state));
+ update_handled_vectors(ioapic);
+ spin_unlock(&ioapic->lock);
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/ioapic.h b/ap/os/linux/linux-3.4.x/virt/kvm/ioapic.h
new file mode 100644
index 0000000..0b190c3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/ioapic.h
@@ -0,0 +1,83 @@
+#ifndef __KVM_IO_APIC_H
+#define __KVM_IO_APIC_H
+
+#include <linux/kvm_host.h>
+
+#include "iodev.h"
+
+struct kvm;
+struct kvm_vcpu;
+
+#define IOAPIC_NUM_PINS KVM_IOAPIC_NUM_PINS
+#define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */
+#define IOAPIC_EDGE_TRIG 0
+#define IOAPIC_LEVEL_TRIG 1
+
+#define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000
+#define IOAPIC_MEM_LENGTH 0x100
+
+/* Direct registers. */
+#define IOAPIC_REG_SELECT 0x00
+#define IOAPIC_REG_WINDOW 0x10
+#define IOAPIC_REG_EOI 0x40 /* IA64 IOSAPIC only */
+
+/* Indirect registers. */
+#define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
+#define IOAPIC_REG_VERSION 0x01
+#define IOAPIC_REG_ARB_ID 0x02 /* x86 IOAPIC only */
+
+/*ioapic delivery mode*/
+#define IOAPIC_FIXED 0x0
+#define IOAPIC_LOWEST_PRIORITY 0x1
+#define IOAPIC_PMI 0x2
+#define IOAPIC_NMI 0x4
+#define IOAPIC_INIT 0x5
+#define IOAPIC_EXTINT 0x7
+
+struct kvm_ioapic {
+ u64 base_address;
+ u32 ioregsel;
+ u32 id;
+ u32 irr;
+ u32 pad;
+ union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
+ unsigned long irq_states[IOAPIC_NUM_PINS];
+ struct kvm_io_device dev;
+ struct kvm *kvm;
+ void (*ack_notifier)(void *opaque, int irq);
+ spinlock_t lock;
+ DECLARE_BITMAP(handled_vectors, 256);
+};
+
+#ifdef DEBUG
+#define ASSERT(x) \
+do { \
+ if (!(x)) { \
+ printk(KERN_EMERG "assertion failed %s: %d: %s\n", \
+ __FILE__, __LINE__, #x); \
+ BUG(); \
+ } \
+} while (0)
+#else
+#define ASSERT(x) do { } while (0)
+#endif
+
+static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
+{
+ return kvm->arch.vioapic;
+}
+
+int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
+ int short_hand, int dest, int dest_mode);
+int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
+void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode);
+int kvm_ioapic_init(struct kvm *kvm);
+void kvm_ioapic_destroy(struct kvm *kvm);
+int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
+void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
+int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq);
+int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
+int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
+
+#endif
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/iodev.h b/ap/os/linux/linux-3.4.x/virt/kvm/iodev.h
new file mode 100644
index 0000000..12fd3ca
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/iodev.h
@@ -0,0 +1,70 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __KVM_IODEV_H__
+#define __KVM_IODEV_H__
+
+#include <linux/kvm_types.h>
+#include <asm/errno.h>
+
+struct kvm_io_device;
+
+/**
+ * kvm_io_device_ops are called under kvm slots_lock.
+ * read and write handlers return 0 if the transaction has been handled,
+ * or non-zero to have it passed to the next device.
+ **/
+struct kvm_io_device_ops {
+ int (*read)(struct kvm_io_device *this,
+ gpa_t addr,
+ int len,
+ void *val);
+ int (*write)(struct kvm_io_device *this,
+ gpa_t addr,
+ int len,
+ const void *val);
+ void (*destructor)(struct kvm_io_device *this);
+};
+
+
+struct kvm_io_device {
+ const struct kvm_io_device_ops *ops;
+};
+
+static inline void kvm_iodevice_init(struct kvm_io_device *dev,
+ const struct kvm_io_device_ops *ops)
+{
+ dev->ops = ops;
+}
+
+static inline int kvm_iodevice_read(struct kvm_io_device *dev,
+ gpa_t addr, int l, void *v)
+{
+ return dev->ops->read ? dev->ops->read(dev, addr, l, v) : -EOPNOTSUPP;
+}
+
+static inline int kvm_iodevice_write(struct kvm_io_device *dev,
+ gpa_t addr, int l, const void *v)
+{
+ return dev->ops->write ? dev->ops->write(dev, addr, l, v) : -EOPNOTSUPP;
+}
+
+static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
+{
+ if (dev->ops->destructor)
+ dev->ops->destructor(dev);
+}
+
+#endif /* __KVM_IODEV_H__ */
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/iommu.c b/ap/os/linux/linux-3.4.x/virt/kvm/iommu.c
new file mode 100644
index 0000000..3225903
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/iommu.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright (c) 2006, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Copyright (C) 2006-2008 Intel Corporation
+ * Copyright IBM Corporation, 2008
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ *
+ * Author: Allen M. Kay <allen.m.kay@intel.com>
+ * Author: Weidong Han <weidong.han@intel.com>
+ * Author: Ben-Ami Yassour <benami@il.ibm.com>
+ */
+
+#include <linux/list.h>
+#include <linux/kvm_host.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/stat.h>
+#include <linux/dmar.h>
+#include <linux/iommu.h>
+#include <linux/intel-iommu.h>
+
+static bool allow_unsafe_assigned_interrupts;
+module_param_named(allow_unsafe_assigned_interrupts,
+ allow_unsafe_assigned_interrupts, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(allow_unsafe_assigned_interrupts,
+ "Enable device assignment on platforms without interrupt remapping support.");
+
+static int kvm_iommu_unmap_memslots(struct kvm *kvm);
+static void kvm_iommu_put_pages(struct kvm *kvm,
+ gfn_t base_gfn, unsigned long npages);
+
+static pfn_t kvm_pin_pages(struct kvm *kvm, struct kvm_memory_slot *slot,
+ gfn_t gfn, unsigned long npages)
+{
+ gfn_t end_gfn;
+ pfn_t pfn;
+
+ pfn = gfn_to_pfn_memslot(kvm, slot, gfn);
+ end_gfn = gfn + npages;
+ gfn += 1;
+
+ if (is_error_pfn(pfn))
+ return pfn;
+
+ while (gfn < end_gfn)
+ gfn_to_pfn_memslot(kvm, slot, gfn++);
+
+ return pfn;
+}
+
+static void kvm_unpin_pages(struct kvm *kvm, pfn_t pfn, unsigned long npages)
+{
+ unsigned long i;
+
+ for (i = 0; i < npages; ++i)
+ kvm_release_pfn_clean(pfn + i);
+}
+
+int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
+{
+ gfn_t gfn, end_gfn;
+ pfn_t pfn;
+ int r = 0;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
+ int flags;
+
+ /* check if iommu exists and in use */
+ if (!domain)
+ return 0;
+
+ gfn = slot->base_gfn;
+ end_gfn = gfn + slot->npages;
+
+ flags = IOMMU_READ | IOMMU_WRITE;
+ if (kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)
+ flags |= IOMMU_CACHE;
+
+
+ while (gfn < end_gfn) {
+ unsigned long page_size;
+
+ /* Check if already mapped */
+ if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn))) {
+ gfn += 1;
+ continue;
+ }
+
+ /* Get the page size we could use to map */
+ page_size = kvm_host_page_size(kvm, gfn);
+
+ /* Make sure the page_size does not exceed the memslot */
+ while ((gfn + (page_size >> PAGE_SHIFT)) > end_gfn)
+ page_size >>= 1;
+
+ /* Make sure gfn is aligned to the page size we want to map */
+ while ((gfn << PAGE_SHIFT) & (page_size - 1))
+ page_size >>= 1;
+
+ /* Make sure hva is aligned to the page size we want to map */
+ while (gfn_to_hva_memslot(slot, gfn) & (page_size - 1))
+ page_size >>= 1;
+
+ /*
+ * Pin all pages we are about to map in memory. This is
+ * important because we unmap and unpin in 4kb steps later.
+ */
+ pfn = kvm_pin_pages(kvm, slot, gfn, page_size >> PAGE_SHIFT);
+ if (is_error_pfn(pfn)) {
+ gfn += 1;
+ continue;
+ }
+
+ /* Map into IO address space */
+ r = iommu_map(domain, gfn_to_gpa(gfn), pfn_to_hpa(pfn),
+ page_size, flags);
+ if (r) {
+ printk(KERN_ERR "kvm_iommu_map_address:"
+ "iommu failed to map pfn=%llx\n", pfn);
+ kvm_unpin_pages(kvm, pfn, page_size >> PAGE_SHIFT);
+ goto unmap_pages;
+ }
+
+ gfn += page_size >> PAGE_SHIFT;
+
+
+ }
+
+ return 0;
+
+unmap_pages:
+ kvm_iommu_put_pages(kvm, slot->base_gfn, gfn - slot->base_gfn);
+ return r;
+}
+
+static int kvm_iommu_map_memslots(struct kvm *kvm)
+{
+ int idx, r = 0;
+ struct kvm_memslots *slots;
+ struct kvm_memory_slot *memslot;
+
+ idx = srcu_read_lock(&kvm->srcu);
+ slots = kvm_memslots(kvm);
+
+ kvm_for_each_memslot(memslot, slots) {
+ r = kvm_iommu_map_pages(kvm, memslot);
+ if (r)
+ break;
+ }
+ srcu_read_unlock(&kvm->srcu, idx);
+
+ return r;
+}
+
+int kvm_assign_device(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *assigned_dev)
+{
+ struct pci_dev *pdev = NULL;
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
+ int r, last_flags;
+
+ /* check if iommu exists and in use */
+ if (!domain)
+ return 0;
+
+ pdev = assigned_dev->dev;
+ if (pdev == NULL)
+ return -ENODEV;
+
+ r = iommu_attach_device(domain, &pdev->dev);
+ if (r) {
+ printk(KERN_ERR "assign device %x:%x:%x.%x failed",
+ pci_domain_nr(pdev->bus),
+ pdev->bus->number,
+ PCI_SLOT(pdev->devfn),
+ PCI_FUNC(pdev->devfn));
+ return r;
+ }
+
+ last_flags = kvm->arch.iommu_flags;
+ if (iommu_domain_has_cap(kvm->arch.iommu_domain,
+ IOMMU_CAP_CACHE_COHERENCY))
+ kvm->arch.iommu_flags |= KVM_IOMMU_CACHE_COHERENCY;
+
+ /* Check if need to update IOMMU page table for guest memory */
+ if ((last_flags ^ kvm->arch.iommu_flags) ==
+ KVM_IOMMU_CACHE_COHERENCY) {
+ kvm_iommu_unmap_memslots(kvm);
+ r = kvm_iommu_map_memslots(kvm);
+ if (r)
+ goto out_unmap;
+ }
+
+ pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
+
+ printk(KERN_DEBUG "assign device %x:%x:%x.%x\n",
+ assigned_dev->host_segnr,
+ assigned_dev->host_busnr,
+ PCI_SLOT(assigned_dev->host_devfn),
+ PCI_FUNC(assigned_dev->host_devfn));
+
+ return 0;
+out_unmap:
+ kvm_iommu_unmap_memslots(kvm);
+ return r;
+}
+
+int kvm_deassign_device(struct kvm *kvm,
+ struct kvm_assigned_dev_kernel *assigned_dev)
+{
+ struct iommu_domain *domain = kvm->arch.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;
+
+ iommu_detach_device(domain, &pdev->dev);
+
+ pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
+
+ printk(KERN_DEBUG "deassign device %x:%x:%x.%x\n",
+ assigned_dev->host_segnr,
+ 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;
+
+ if (!iommu_present(&pci_bus_type)) {
+ printk(KERN_ERR "%s: iommu not found\n", __func__);
+ return -ENODEV;
+ }
+
+ mutex_lock(&kvm->slots_lock);
+
+ kvm->arch.iommu_domain = iommu_domain_alloc(&pci_bus_type);
+ if (!kvm->arch.iommu_domain) {
+ r = -ENOMEM;
+ goto out_unlock;
+ }
+
+ if (!allow_unsafe_assigned_interrupts &&
+ !iommu_domain_has_cap(kvm->arch.iommu_domain,
+ IOMMU_CAP_INTR_REMAP)) {
+ printk(KERN_WARNING "%s: No interrupt remapping support,"
+ " disallowing device assignment."
+ " Re-enble with \"allow_unsafe_assigned_interrupts=1\""
+ " module option.\n", __func__);
+ iommu_domain_free(kvm->arch.iommu_domain);
+ kvm->arch.iommu_domain = NULL;
+ r = -EPERM;
+ goto out_unlock;
+ }
+
+ r = kvm_iommu_map_memslots(kvm);
+ if (r)
+ kvm_iommu_unmap_memslots(kvm);
+
+out_unlock:
+ mutex_unlock(&kvm->slots_lock);
+ return r;
+}
+
+static void kvm_iommu_put_pages(struct kvm *kvm,
+ gfn_t base_gfn, unsigned long npages)
+{
+ struct iommu_domain *domain;
+ gfn_t end_gfn, gfn;
+ pfn_t pfn;
+ u64 phys;
+
+ domain = kvm->arch.iommu_domain;
+ end_gfn = base_gfn + npages;
+ gfn = base_gfn;
+
+ /* check if iommu exists and in use */
+ if (!domain)
+ return;
+
+ while (gfn < end_gfn) {
+ unsigned long unmap_pages;
+ size_t size;
+
+ /* Get physical address */
+ phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn));
+ pfn = phys >> PAGE_SHIFT;
+
+ /* Unmap address from IO address space */
+ size = iommu_unmap(domain, gfn_to_gpa(gfn), PAGE_SIZE);
+ unmap_pages = 1ULL << get_order(size);
+
+ /* Unpin all pages we just unmapped to not leak any memory */
+ kvm_unpin_pages(kvm, pfn, unmap_pages);
+
+ gfn += unmap_pages;
+ }
+}
+
+void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot)
+{
+ kvm_iommu_put_pages(kvm, slot->base_gfn, slot->npages);
+}
+
+static int kvm_iommu_unmap_memslots(struct kvm *kvm)
+{
+ int idx;
+ struct kvm_memslots *slots;
+ struct kvm_memory_slot *memslot;
+
+ idx = srcu_read_lock(&kvm->srcu);
+ slots = kvm_memslots(kvm);
+
+ kvm_for_each_memslot(memslot, slots)
+ kvm_iommu_unmap_pages(kvm, memslot);
+
+ srcu_read_unlock(&kvm->srcu, idx);
+
+ return 0;
+}
+
+int kvm_iommu_unmap_guest(struct kvm *kvm)
+{
+ struct iommu_domain *domain = kvm->arch.iommu_domain;
+
+ /* check if iommu exists and in use */
+ if (!domain)
+ return 0;
+
+ mutex_lock(&kvm->slots_lock);
+ kvm_iommu_unmap_memslots(kvm);
+ kvm->arch.iommu_domain = NULL;
+ mutex_unlock(&kvm->slots_lock);
+
+ iommu_domain_free(domain);
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/irq_comm.c b/ap/os/linux/linux-3.4.x/virt/kvm/irq_comm.c
new file mode 100644
index 0000000..272407c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/irq_comm.c
@@ -0,0 +1,475 @@
+/*
+ * irq_comm.c: Common API for in kernel interrupt controller
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ * Authors:
+ * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
+ *
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/slab.h>
+#include <trace/events/kvm.h>
+
+#include <asm/msidef.h>
+#ifdef CONFIG_IA64
+#include <asm/iosapic.h>
+#endif
+
+#include "irq.h"
+
+#include "ioapic.h"
+
+static inline int kvm_irq_line_state(unsigned long *irq_state,
+ int irq_source_id, int level)
+{
+ /* Logical OR for level trig interrupt */
+ if (level)
+ set_bit(irq_source_id, irq_state);
+ else
+ clear_bit(irq_source_id, irq_state);
+
+ return !!(*irq_state);
+}
+
+static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int irq_source_id, int level)
+{
+#ifdef CONFIG_X86
+ struct kvm_pic *pic = pic_irqchip(kvm);
+ level = kvm_irq_line_state(&pic->irq_states[e->irqchip.pin],
+ irq_source_id, level);
+ return kvm_pic_set_irq(pic, e->irqchip.pin, level);
+#else
+ return -1;
+#endif
+}
+
+static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int irq_source_id, int level)
+{
+ struct kvm_ioapic *ioapic = kvm->arch.vioapic;
+ level = kvm_irq_line_state(&ioapic->irq_states[e->irqchip.pin],
+ irq_source_id, level);
+
+ return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, level);
+}
+
+inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq)
+{
+#ifdef CONFIG_IA64
+ return irq->delivery_mode ==
+ (IOSAPIC_LOWEST_PRIORITY << IOSAPIC_DELIVERY_SHIFT);
+#else
+ return irq->delivery_mode == APIC_DM_LOWEST;
+#endif
+}
+
+int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq)
+{
+ int i, r = -1;
+ struct kvm_vcpu *vcpu, *lowest = NULL;
+
+ if (irq->dest_mode == 0 && irq->dest_id == 0xff &&
+ kvm_is_dm_lowest_prio(irq))
+ printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
+
+ kvm_for_each_vcpu(i, vcpu, kvm) {
+ if (!kvm_apic_present(vcpu))
+ continue;
+
+ if (!kvm_apic_match_dest(vcpu, src, irq->shorthand,
+ irq->dest_id, irq->dest_mode))
+ continue;
+
+ if (!kvm_is_dm_lowest_prio(irq)) {
+ if (r < 0)
+ r = 0;
+ r += kvm_apic_set_irq(vcpu, irq);
+ } else if (kvm_lapic_enabled(vcpu)) {
+ if (!lowest)
+ lowest = vcpu;
+ else if (kvm_apic_compare_prio(vcpu, lowest) < 0)
+ lowest = vcpu;
+ }
+ }
+
+ if (lowest)
+ r = kvm_apic_set_irq(lowest, irq);
+
+ return r;
+}
+
+int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int irq_source_id, int level)
+{
+ struct kvm_lapic_irq irq;
+
+ if (!level)
+ return -1;
+
+ trace_kvm_msi_set_irq(e->msi.address_lo, e->msi.data);
+
+ irq.dest_id = (e->msi.address_lo &
+ MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
+ irq.vector = (e->msi.data &
+ MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
+ irq.dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo;
+ irq.trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data;
+ irq.delivery_mode = e->msi.data & 0x700;
+ irq.level = 1;
+ irq.shorthand = 0;
+
+ /* TODO Deal with RH bit of MSI message address */
+ return kvm_irq_delivery_to_apic(kvm, NULL, &irq);
+}
+
+/*
+ * Return value:
+ * < 0 Interrupt was ignored (masked or not delivered for other reasons)
+ * = 0 Interrupt was coalesced (previous irq is still pending)
+ * > 0 Number of CPUs interrupt was delivered to
+ */
+int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level)
+{
+ struct kvm_kernel_irq_routing_entry *e, irq_set[KVM_NR_IRQCHIPS];
+ int ret = -1, i = 0;
+ struct kvm_irq_routing_table *irq_rt;
+ struct hlist_node *n;
+
+ trace_kvm_set_irq(irq, level, irq_source_id);
+
+ /* Not possible to detect if the guest uses the PIC or the
+ * IOAPIC. So set the bit in both. The guest will ignore
+ * writes to the unused one.
+ */
+ rcu_read_lock();
+ irq_rt = rcu_dereference(kvm->irq_routing);
+ if (irq < irq_rt->nr_rt_entries)
+ hlist_for_each_entry(e, n, &irq_rt->map[irq], link)
+ irq_set[i++] = *e;
+ rcu_read_unlock();
+
+ while(i--) {
+ int r;
+ r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level);
+ if (r < 0)
+ continue;
+
+ ret = r + ((ret < 0) ? 0 : ret);
+ }
+
+ return ret;
+}
+
+void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
+{
+ struct kvm_irq_ack_notifier *kian;
+ struct hlist_node *n;
+ int gsi;
+
+ trace_kvm_ack_irq(irqchip, pin);
+
+ rcu_read_lock();
+ gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin];
+ if (gsi != -1)
+ hlist_for_each_entry_rcu(kian, n, &kvm->irq_ack_notifier_list,
+ link)
+ if (kian->gsi == gsi)
+ kian->irq_acked(kian);
+ rcu_read_unlock();
+}
+
+void kvm_register_irq_ack_notifier(struct kvm *kvm,
+ struct kvm_irq_ack_notifier *kian)
+{
+ mutex_lock(&kvm->irq_lock);
+ hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list);
+ mutex_unlock(&kvm->irq_lock);
+}
+
+void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
+ struct kvm_irq_ack_notifier *kian)
+{
+ mutex_lock(&kvm->irq_lock);
+ hlist_del_init_rcu(&kian->link);
+ mutex_unlock(&kvm->irq_lock);
+ synchronize_rcu();
+}
+
+int kvm_request_irq_source_id(struct kvm *kvm)
+{
+ unsigned long *bitmap = &kvm->arch.irq_sources_bitmap;
+ int irq_source_id;
+
+ mutex_lock(&kvm->irq_lock);
+ irq_source_id = find_first_zero_bit(bitmap, BITS_PER_LONG);
+
+ if (irq_source_id >= BITS_PER_LONG) {
+ printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n");
+ irq_source_id = -EFAULT;
+ goto unlock;
+ }
+
+ ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
+ set_bit(irq_source_id, bitmap);
+unlock:
+ mutex_unlock(&kvm->irq_lock);
+
+ return irq_source_id;
+}
+
+void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
+{
+ int i;
+
+ ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
+
+ mutex_lock(&kvm->irq_lock);
+ if (irq_source_id < 0 ||
+ irq_source_id >= BITS_PER_LONG) {
+ printk(KERN_ERR "kvm: IRQ source ID out of range!\n");
+ goto unlock;
+ }
+ clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap);
+ if (!irqchip_in_kernel(kvm))
+ goto unlock;
+
+ for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) {
+ clear_bit(irq_source_id, &kvm->arch.vioapic->irq_states[i]);
+ if (i >= 16)
+ continue;
+#ifdef CONFIG_X86
+ clear_bit(irq_source_id, &pic_irqchip(kvm)->irq_states[i]);
+#endif
+ }
+unlock:
+ mutex_unlock(&kvm->irq_lock);
+}
+
+void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
+ struct kvm_irq_mask_notifier *kimn)
+{
+ mutex_lock(&kvm->irq_lock);
+ kimn->irq = irq;
+ hlist_add_head_rcu(&kimn->link, &kvm->mask_notifier_list);
+ mutex_unlock(&kvm->irq_lock);
+}
+
+void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
+ struct kvm_irq_mask_notifier *kimn)
+{
+ mutex_lock(&kvm->irq_lock);
+ hlist_del_rcu(&kimn->link);
+ mutex_unlock(&kvm->irq_lock);
+ synchronize_rcu();
+}
+
+void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
+ bool mask)
+{
+ struct kvm_irq_mask_notifier *kimn;
+ struct hlist_node *n;
+ int gsi;
+
+ rcu_read_lock();
+ gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin];
+ if (gsi != -1)
+ hlist_for_each_entry_rcu(kimn, n, &kvm->mask_notifier_list, link)
+ if (kimn->irq == gsi)
+ kimn->func(kimn, mask);
+ rcu_read_unlock();
+}
+
+void kvm_free_irq_routing(struct kvm *kvm)
+{
+ /* Called only during vm destruction. Nobody can use the pointer
+ at this stage */
+ kfree(kvm->irq_routing);
+}
+
+static int setup_routing_entry(struct kvm_irq_routing_table *rt,
+ struct kvm_kernel_irq_routing_entry *e,
+ const struct kvm_irq_routing_entry *ue)
+{
+ int r = -EINVAL;
+ int delta;
+ unsigned max_pin;
+ struct kvm_kernel_irq_routing_entry *ei;
+ struct hlist_node *n;
+
+ /*
+ * Do not allow GSI to be mapped to the same irqchip more than once.
+ * Allow only one to one mapping between GSI and MSI.
+ */
+ hlist_for_each_entry(ei, n, &rt->map[ue->gsi], link)
+ if (ei->type == KVM_IRQ_ROUTING_MSI ||
+ ue->type == KVM_IRQ_ROUTING_MSI ||
+ ue->u.irqchip.irqchip == ei->irqchip.irqchip)
+ return r;
+
+ e->gsi = ue->gsi;
+ e->type = ue->type;
+ switch (ue->type) {
+ case KVM_IRQ_ROUTING_IRQCHIP:
+ delta = 0;
+ switch (ue->u.irqchip.irqchip) {
+ case KVM_IRQCHIP_PIC_MASTER:
+ e->set = kvm_set_pic_irq;
+ max_pin = 16;
+ break;
+ case KVM_IRQCHIP_PIC_SLAVE:
+ e->set = kvm_set_pic_irq;
+ max_pin = 16;
+ delta = 8;
+ break;
+ case KVM_IRQCHIP_IOAPIC:
+ max_pin = KVM_IOAPIC_NUM_PINS;
+ e->set = kvm_set_ioapic_irq;
+ break;
+ default:
+ goto out;
+ }
+ e->irqchip.irqchip = ue->u.irqchip.irqchip;
+ e->irqchip.pin = ue->u.irqchip.pin + delta;
+ if (e->irqchip.pin >= max_pin)
+ goto out;
+ rt->chip[ue->u.irqchip.irqchip][e->irqchip.pin] = ue->gsi;
+ break;
+ case KVM_IRQ_ROUTING_MSI:
+ e->set = kvm_set_msi;
+ e->msi.address_lo = ue->u.msi.address_lo;
+ e->msi.address_hi = ue->u.msi.address_hi;
+ e->msi.data = ue->u.msi.data;
+ break;
+ default:
+ goto out;
+ }
+
+ hlist_add_head(&e->link, &rt->map[e->gsi]);
+ r = 0;
+out:
+ return r;
+}
+
+
+int kvm_set_irq_routing(struct kvm *kvm,
+ const struct kvm_irq_routing_entry *ue,
+ unsigned nr,
+ unsigned flags)
+{
+ struct kvm_irq_routing_table *new, *old;
+ u32 i, j, nr_rt_entries = 0;
+ int r;
+
+ for (i = 0; i < nr; ++i) {
+ if (ue[i].gsi >= KVM_MAX_IRQ_ROUTES)
+ return -EINVAL;
+ nr_rt_entries = max(nr_rt_entries, ue[i].gsi);
+ }
+
+ nr_rt_entries += 1;
+
+ new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head))
+ + (nr * sizeof(struct kvm_kernel_irq_routing_entry)),
+ GFP_KERNEL);
+
+ if (!new)
+ return -ENOMEM;
+
+ new->rt_entries = (void *)&new->map[nr_rt_entries];
+
+ new->nr_rt_entries = nr_rt_entries;
+ for (i = 0; i < 3; i++)
+ for (j = 0; j < KVM_IOAPIC_NUM_PINS; j++)
+ new->chip[i][j] = -1;
+
+ for (i = 0; i < nr; ++i) {
+ r = -EINVAL;
+ if (ue->flags)
+ goto out;
+ r = setup_routing_entry(new, &new->rt_entries[i], ue);
+ if (r)
+ goto out;
+ ++ue;
+ }
+
+ mutex_lock(&kvm->irq_lock);
+ old = kvm->irq_routing;
+ kvm_irq_routing_update(kvm, new);
+ mutex_unlock(&kvm->irq_lock);
+
+ synchronize_rcu();
+
+ new = old;
+ r = 0;
+
+out:
+ kfree(new);
+ return r;
+}
+
+#define IOAPIC_ROUTING_ENTRY(irq) \
+ { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \
+ .u.irqchip.irqchip = KVM_IRQCHIP_IOAPIC, .u.irqchip.pin = (irq) }
+#define ROUTING_ENTRY1(irq) IOAPIC_ROUTING_ENTRY(irq)
+
+#ifdef CONFIG_X86
+# define PIC_ROUTING_ENTRY(irq) \
+ { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \
+ .u.irqchip.irqchip = SELECT_PIC(irq), .u.irqchip.pin = (irq) % 8 }
+# define ROUTING_ENTRY2(irq) \
+ IOAPIC_ROUTING_ENTRY(irq), PIC_ROUTING_ENTRY(irq)
+#else
+# define ROUTING_ENTRY2(irq) \
+ IOAPIC_ROUTING_ENTRY(irq)
+#endif
+
+static const struct kvm_irq_routing_entry default_routing[] = {
+ ROUTING_ENTRY2(0), ROUTING_ENTRY2(1),
+ ROUTING_ENTRY2(2), ROUTING_ENTRY2(3),
+ ROUTING_ENTRY2(4), ROUTING_ENTRY2(5),
+ ROUTING_ENTRY2(6), ROUTING_ENTRY2(7),
+ ROUTING_ENTRY2(8), ROUTING_ENTRY2(9),
+ ROUTING_ENTRY2(10), ROUTING_ENTRY2(11),
+ ROUTING_ENTRY2(12), ROUTING_ENTRY2(13),
+ ROUTING_ENTRY2(14), ROUTING_ENTRY2(15),
+ ROUTING_ENTRY1(16), ROUTING_ENTRY1(17),
+ ROUTING_ENTRY1(18), ROUTING_ENTRY1(19),
+ ROUTING_ENTRY1(20), ROUTING_ENTRY1(21),
+ ROUTING_ENTRY1(22), ROUTING_ENTRY1(23),
+#ifdef CONFIG_IA64
+ ROUTING_ENTRY1(24), ROUTING_ENTRY1(25),
+ ROUTING_ENTRY1(26), ROUTING_ENTRY1(27),
+ ROUTING_ENTRY1(28), ROUTING_ENTRY1(29),
+ ROUTING_ENTRY1(30), ROUTING_ENTRY1(31),
+ ROUTING_ENTRY1(32), ROUTING_ENTRY1(33),
+ ROUTING_ENTRY1(34), ROUTING_ENTRY1(35),
+ ROUTING_ENTRY1(36), ROUTING_ENTRY1(37),
+ ROUTING_ENTRY1(38), ROUTING_ENTRY1(39),
+ ROUTING_ENTRY1(40), ROUTING_ENTRY1(41),
+ ROUTING_ENTRY1(42), ROUTING_ENTRY1(43),
+ ROUTING_ENTRY1(44), ROUTING_ENTRY1(45),
+ ROUTING_ENTRY1(46), ROUTING_ENTRY1(47),
+#endif
+};
+
+int kvm_setup_default_irq_routing(struct kvm *kvm)
+{
+ return kvm_set_irq_routing(kvm, default_routing,
+ ARRAY_SIZE(default_routing), 0);
+}
diff --git a/ap/os/linux/linux-3.4.x/virt/kvm/kvm_main.c b/ap/os/linux/linux-3.4.x/virt/kvm/kvm_main.c
new file mode 100644
index 0000000..f4732bd
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/virt/kvm/kvm_main.c
@@ -0,0 +1,2843 @@
+/*
+ * Kernel-based Virtual Machine driver for Linux
+ *
+ * This module enables machines with Intel VT-x extensions to run virtual
+ * machines without emulation or binary translation.
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ *
+ * Authors:
+ * Avi Kivity <avi@qumranet.com>
+ * Yaniv Kamay <yaniv@qumranet.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "iodev.h"
+
+#include <linux/kvm_host.h>
+#include <linux/kvm.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/percpu.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/reboot.h>
+#include <linux/debugfs.h>
+#include <linux/highmem.h>
+#include <linux/file.h>
+#include <linux/syscore_ops.h>
+#include <linux/cpu.h>
+#include <linux/sched.h>
+#include <linux/cpumask.h>
+#include <linux/smp.h>
+#include <linux/anon_inodes.h>
+#include <linux/profile.h>
+#include <linux/kvm_para.h>
+#include <linux/pagemap.h>
+#include <linux/mman.h>
+#include <linux/swap.h>
+#include <linux/bitops.h>
+#include <linux/spinlock.h>
+#include <linux/compat.h>
+#include <linux/srcu.h>
+#include <linux/hugetlb.h>
+#include <linux/slab.h>
+#include <linux/sort.h>
+#include <linux/bsearch.h>
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/ioctl.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+
+#include "coalesced_mmio.h"
+#include "async_pf.h"
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/kvm.h>
+
+MODULE_AUTHOR("Qumranet");
+MODULE_LICENSE("GPL");
+
+/*
+ * Ordering of locks:
+ *
+ * kvm->lock --> kvm->slots_lock --> kvm->irq_lock
+ */
+
+DEFINE_RAW_SPINLOCK(kvm_lock);
+LIST_HEAD(vm_list);
+
+static cpumask_var_t cpus_hardware_enabled;
+static int kvm_usage_count = 0;
+static atomic_t hardware_enable_failed;
+
+struct kmem_cache *kvm_vcpu_cache;
+EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
+
+static __read_mostly struct preempt_ops kvm_preempt_ops;
+
+struct dentry *kvm_debugfs_dir;
+
+static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
+ unsigned long arg);
+#ifdef CONFIG_COMPAT
+static long kvm_vcpu_compat_ioctl(struct file *file, unsigned int ioctl,
+ unsigned long arg);
+#endif
+static int hardware_enable_all(void);
+static void hardware_disable_all(void);
+
+static void kvm_io_bus_destroy(struct kvm_io_bus *bus);
+
+bool kvm_rebooting;
+EXPORT_SYMBOL_GPL(kvm_rebooting);
+
+static bool largepages_enabled = true;
+
+static struct page *hwpoison_page;
+static pfn_t hwpoison_pfn;
+
+struct page *fault_page;
+pfn_t fault_pfn;
+
+inline int kvm_is_mmio_pfn(pfn_t pfn)
+{
+ if (pfn_valid(pfn)) {
+ int reserved;
+ struct page *tail = pfn_to_page(pfn);
+ struct page *head = compound_trans_head(tail);
+ reserved = PageReserved(head);
+ if (head != tail) {
+ /*
+ * "head" is not a dangling pointer
+ * (compound_trans_head takes care of that)
+ * but the hugepage may have been splitted
+ * from under us (and we may not hold a
+ * reference count on the head page so it can
+ * be reused before we run PageReferenced), so
+ * we've to check PageTail before returning
+ * what we just read.
+ */
+ smp_rmb();
+ if (PageTail(tail))
+ return reserved;
+ }
+ return PageReserved(tail);
+ }
+
+ return true;
+}
+
+/*
+ * Switches to specified vcpu, until a matching vcpu_put()
+ */
+void vcpu_load(struct kvm_vcpu *vcpu)
+{
+ int cpu;
+
+ mutex_lock(&vcpu->mutex);
+ if (unlikely(vcpu->pid != current->pids[PIDTYPE_PID].pid)) {
+ /* The thread running this VCPU changed. */
+ struct pid *oldpid = vcpu->pid;
+ struct pid *newpid = get_task_pid(current, PIDTYPE_PID);
+ rcu_assign_pointer(vcpu->pid, newpid);
+ synchronize_rcu();
+ put_pid(oldpid);
+ }
+ cpu = get_cpu();
+ preempt_notifier_register(&vcpu->preempt_notifier);
+ kvm_arch_vcpu_load(vcpu, cpu);
+ put_cpu();
+}
+
+void vcpu_put(struct kvm_vcpu *vcpu)
+{
+ preempt_disable();
+ kvm_arch_vcpu_put(vcpu);
+ preempt_notifier_unregister(&vcpu->preempt_notifier);
+ preempt_enable();
+ mutex_unlock(&vcpu->mutex);
+}
+
+static void ack_flush(void *_completed)
+{
+}
+
+static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
+{
+ int i, cpu, me;
+ cpumask_var_t cpus;
+ bool called = true;
+ struct kvm_vcpu *vcpu;
+
+ zalloc_cpumask_var(&cpus, GFP_ATOMIC);
+
+ me = get_cpu();
+ kvm_for_each_vcpu(i, vcpu, kvm) {
+ kvm_make_request(req, vcpu);
+ cpu = vcpu->cpu;
+
+ /* Set ->requests bit before we read ->mode */
+ smp_mb();
+
+ if (cpus != NULL && cpu != -1 && cpu != me &&
+ kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE)
+ cpumask_set_cpu(cpu, cpus);
+ }
+ if (unlikely(cpus == NULL))
+ smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1);
+ else if (!cpumask_empty(cpus))
+ smp_call_function_many(cpus, ack_flush, NULL, 1);
+ else
+ called = false;
+ put_cpu();
+ free_cpumask_var(cpus);
+ return called;
+}
+
+void kvm_flush_remote_tlbs(struct kvm *kvm)
+{
+ long dirty_count = kvm->tlbs_dirty;
+
+ smp_mb();
+ if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
+ ++kvm->stat.remote_tlb_flush;
+ cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
+}
+
+void kvm_reload_remote_mmus(struct kvm *kvm)
+{
+ make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD);
+}
+
+int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
+{
+ struct page *page;
+ int r;
+
+ mutex_init(&vcpu->mutex);
+ vcpu->cpu = -1;
+ vcpu->kvm = kvm;
+ vcpu->vcpu_id = id;
+ vcpu->pid = NULL;
+ init_waitqueue_head(&vcpu->wq);
+ kvm_async_pf_vcpu_init(vcpu);
+
+ page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (!page) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ vcpu->run = page_address(page);
+
+ r = kvm_arch_vcpu_init(vcpu);
+ if (r < 0)
+ goto fail_free_run;
+ return 0;
+
+fail_free_run:
+ free_page((unsigned long)vcpu->run);
+fail:
+ return r;
+}
+EXPORT_SYMBOL_GPL(kvm_vcpu_init);
+
+void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
+{
+ put_pid(vcpu->pid);
+ kvm_arch_vcpu_uninit(vcpu);
+ free_page((unsigned long)vcpu->run);
+}
+EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
+
+#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
+static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn)
+{
+ return container_of(mn, struct kvm, mmu_notifier);
+}
+
+static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn,
+ struct mm_struct *mm,
+ unsigned long address)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ int need_tlb_flush, idx;
+
+ /*
+ * When ->invalidate_page runs, the linux pte has been zapped
+ * already but the page is still allocated until
+ * ->invalidate_page returns. So if we increase the sequence
+ * here the kvm page fault will notice if the spte can't be
+ * established because the page is going to be freed. If
+ * instead the kvm page fault establishes the spte before
+ * ->invalidate_page runs, kvm_unmap_hva will release it
+ * before returning.
+ *
+ * The sequence increase only need to be seen at spin_unlock
+ * time, and not at spin_lock time.
+ *
+ * Increasing the sequence after the spin_unlock would be
+ * unsafe because the kvm page fault could then establish the
+ * pte after kvm_unmap_hva returned, without noticing the page
+ * is going to be freed.
+ */
+ idx = srcu_read_lock(&kvm->srcu);
+ spin_lock(&kvm->mmu_lock);
+
+ kvm->mmu_notifier_seq++;
+ need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty;
+ /* we've to flush the tlb before the pages can be freed */
+ if (need_tlb_flush)
+ kvm_flush_remote_tlbs(kvm);
+
+ spin_unlock(&kvm->mmu_lock);
+ srcu_read_unlock(&kvm->srcu, idx);
+}
+
+static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn,
+ struct mm_struct *mm,
+ unsigned long address,
+ pte_t pte)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ int idx;
+
+ idx = srcu_read_lock(&kvm->srcu);
+ spin_lock(&kvm->mmu_lock);
+ kvm->mmu_notifier_seq++;
+ kvm_set_spte_hva(kvm, address, pte);
+ spin_unlock(&kvm->mmu_lock);
+ srcu_read_unlock(&kvm->srcu, idx);
+}
+
+static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
+ struct mm_struct *mm,
+ unsigned long start,
+ unsigned long end)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ int need_tlb_flush = 0, idx;
+
+ idx = srcu_read_lock(&kvm->srcu);
+ spin_lock(&kvm->mmu_lock);
+ /*
+ * The count increase must become visible at unlock time as no
+ * spte can be established without taking the mmu_lock and
+ * count is also read inside the mmu_lock critical section.
+ */
+ kvm->mmu_notifier_count++;
+ for (; start < end; start += PAGE_SIZE)
+ need_tlb_flush |= kvm_unmap_hva(kvm, start);
+ need_tlb_flush |= kvm->tlbs_dirty;
+ /* we've to flush the tlb before the pages can be freed */
+ if (need_tlb_flush)
+ kvm_flush_remote_tlbs(kvm);
+
+ spin_unlock(&kvm->mmu_lock);
+ srcu_read_unlock(&kvm->srcu, idx);
+}
+
+static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn,
+ struct mm_struct *mm,
+ unsigned long start,
+ unsigned long end)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+
+ spin_lock(&kvm->mmu_lock);
+ /*
+ * This sequence increase will notify the kvm page fault that
+ * the page that is going to be mapped in the spte could have
+ * been freed.
+ */
+ kvm->mmu_notifier_seq++;
+ smp_wmb();
+ /*
+ * The above sequence increase must be visible before the
+ * below count decrease, which is ensured by the smp_wmb above
+ * in conjunction with the smp_rmb in mmu_notifier_retry().
+ */
+ kvm->mmu_notifier_count--;
+ spin_unlock(&kvm->mmu_lock);
+
+ BUG_ON(kvm->mmu_notifier_count < 0);
+}
+
+static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn,
+ struct mm_struct *mm,
+ unsigned long address)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ int young, idx;
+
+ idx = srcu_read_lock(&kvm->srcu);
+ spin_lock(&kvm->mmu_lock);
+
+ young = kvm_age_hva(kvm, address);
+ if (young)
+ kvm_flush_remote_tlbs(kvm);
+
+ spin_unlock(&kvm->mmu_lock);
+ srcu_read_unlock(&kvm->srcu, idx);
+
+ return young;
+}
+
+static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn,
+ struct mm_struct *mm,
+ unsigned long address)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ int young, idx;
+
+ idx = srcu_read_lock(&kvm->srcu);
+ spin_lock(&kvm->mmu_lock);
+ young = kvm_test_age_hva(kvm, address);
+ spin_unlock(&kvm->mmu_lock);
+ srcu_read_unlock(&kvm->srcu, idx);
+
+ return young;
+}
+
+static void kvm_mmu_notifier_release(struct mmu_notifier *mn,
+ struct mm_struct *mm)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ int idx;
+
+ idx = srcu_read_lock(&kvm->srcu);
+ kvm_arch_flush_shadow(kvm);
+ srcu_read_unlock(&kvm->srcu, idx);
+}
+
+static const struct mmu_notifier_ops kvm_mmu_notifier_ops = {
+ .invalidate_page = kvm_mmu_notifier_invalidate_page,
+ .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start,
+ .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end,
+ .clear_flush_young = kvm_mmu_notifier_clear_flush_young,
+ .test_young = kvm_mmu_notifier_test_young,
+ .change_pte = kvm_mmu_notifier_change_pte,
+ .release = kvm_mmu_notifier_release,
+};
+
+static int kvm_init_mmu_notifier(struct kvm *kvm)
+{
+ kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops;
+ return mmu_notifier_register(&kvm->mmu_notifier, current->mm);
+}
+
+#else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */
+
+static int kvm_init_mmu_notifier(struct kvm *kvm)
+{
+ return 0;
+}
+
+#endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */
+
+static void kvm_init_memslots_id(struct kvm *kvm)
+{
+ int i;
+ struct kvm_memslots *slots = kvm->memslots;
+
+ for (i = 0; i < KVM_MEM_SLOTS_NUM; i++)
+ slots->id_to_index[i] = slots->memslots[i].id = i;
+}
+
+static struct kvm *kvm_create_vm(unsigned long type)
+{
+ int r, i;
+ struct kvm *kvm = kvm_arch_alloc_vm();
+
+ if (!kvm)
+ return ERR_PTR(-ENOMEM);
+
+ r = kvm_arch_init_vm(kvm, type);
+ if (r)
+ goto out_err_nodisable;
+
+ r = hardware_enable_all();
+ if (r)
+ goto out_err_nodisable;
+
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
+ INIT_HLIST_HEAD(&kvm->mask_notifier_list);
+ INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list);
+#endif
+
+ r = -ENOMEM;
+ kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
+ if (!kvm->memslots)
+ goto out_err_nosrcu;
+ kvm_init_memslots_id(kvm);
+ if (init_srcu_struct(&kvm->srcu))
+ goto out_err_nosrcu;
+ for (i = 0; i < KVM_NR_BUSES; i++) {
+ kvm->buses[i] = kzalloc(sizeof(struct kvm_io_bus),
+ GFP_KERNEL);
+ if (!kvm->buses[i])
+ goto out_err;
+ }
+
+ spin_lock_init(&kvm->mmu_lock);
+ kvm->mm = current->mm;
+ atomic_inc(&kvm->mm->mm_count);
+ kvm_eventfd_init(kvm);
+ mutex_init(&kvm->lock);
+ mutex_init(&kvm->irq_lock);
+ mutex_init(&kvm->slots_lock);
+ atomic_set(&kvm->users_count, 1);
+
+ r = kvm_init_mmu_notifier(kvm);
+ if (r)
+ goto out_err;
+
+ raw_spin_lock(&kvm_lock);
+ list_add(&kvm->vm_list, &vm_list);
+ raw_spin_unlock(&kvm_lock);
+
+ return kvm;
+
+out_err:
+ cleanup_srcu_struct(&kvm->srcu);
+out_err_nosrcu:
+ hardware_disable_all();
+out_err_nodisable:
+ for (i = 0; i < KVM_NR_BUSES; i++)
+ kfree(kvm->buses[i]);
+ kfree(kvm->memslots);
+ kvm_arch_free_vm(kvm);
+ return ERR_PTR(r);
+}
+
+static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot)
+{
+ if (!memslot->dirty_bitmap)
+ return;
+
+ if (2 * kvm_dirty_bitmap_bytes(memslot) > PAGE_SIZE)
+ vfree(memslot->dirty_bitmap_head);
+ else
+ kfree(memslot->dirty_bitmap_head);
+
+ memslot->dirty_bitmap = NULL;
+ memslot->dirty_bitmap_head = NULL;
+}
+
+/*
+ * Free any memory in @free but not in @dont.
+ */
+static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
+ struct kvm_memory_slot *dont)
+{
+ if (!dont || free->rmap != dont->rmap)
+ vfree(free->rmap);
+
+ if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
+ kvm_destroy_dirty_bitmap(free);
+
+ kvm_arch_free_memslot(free, dont);
+
+ free->npages = 0;
+ free->rmap = NULL;
+}
+
+void kvm_free_physmem(struct kvm *kvm)
+{
+ struct kvm_memslots *slots = kvm->memslots;
+ struct kvm_memory_slot *memslot;
+
+ kvm_for_each_memslot(memslot, slots)
+ kvm_free_physmem_slot(memslot, NULL);
+
+ kfree(kvm->memslots);
+}
+
+static void kvm_destroy_vm(struct kvm *kvm)
+{
+ int i;
+ struct mm_struct *mm = kvm->mm;
+
+ kvm_arch_sync_events(kvm);
+ raw_spin_lock(&kvm_lock);
+ list_del(&kvm->vm_list);
+ raw_spin_unlock(&kvm_lock);
+ kvm_free_irq_routing(kvm);
+ for (i = 0; i < KVM_NR_BUSES; i++)
+ kvm_io_bus_destroy(kvm->buses[i]);
+ kvm_coalesced_mmio_free(kvm);
+#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
+ mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm);
+#else
+ kvm_arch_flush_shadow(kvm);
+#endif
+ kvm_arch_destroy_vm(kvm);
+ kvm_free_physmem(kvm);
+ cleanup_srcu_struct(&kvm->srcu);
+ kvm_arch_free_vm(kvm);
+ hardware_disable_all();
+ mmdrop(mm);
+}
+
+void kvm_get_kvm(struct kvm *kvm)
+{
+ atomic_inc(&kvm->users_count);
+}
+EXPORT_SYMBOL_GPL(kvm_get_kvm);
+
+void kvm_put_kvm(struct kvm *kvm)
+{
+ if (atomic_dec_and_test(&kvm->users_count))
+ kvm_destroy_vm(kvm);
+}
+EXPORT_SYMBOL_GPL(kvm_put_kvm);
+
+
+static int kvm_vm_release(struct inode *inode, struct file *filp)
+{
+ struct kvm *kvm = filp->private_data;
+
+ kvm_irqfd_release(kvm);
+
+ kvm_put_kvm(kvm);
+ return 0;
+}
+
+/*
+ * Allocation size is twice as large as the actual dirty bitmap size.
+ * This makes it possible to do double buffering: see x86's
+ * kvm_vm_ioctl_get_dirty_log().
+ */
+static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
+{
+#ifndef CONFIG_S390
+ unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
+
+ if (dirty_bytes > PAGE_SIZE)
+ memslot->dirty_bitmap = vzalloc(dirty_bytes);
+ else
+ memslot->dirty_bitmap = kzalloc(dirty_bytes, GFP_KERNEL);
+
+ if (!memslot->dirty_bitmap)
+ return -ENOMEM;
+
+ memslot->dirty_bitmap_head = memslot->dirty_bitmap;
+ memslot->nr_dirty_pages = 0;
+#endif /* !CONFIG_S390 */
+ return 0;
+}
+
+static int cmp_memslot(const void *slot1, const void *slot2)
+{
+ struct kvm_memory_slot *s1, *s2;
+
+ s1 = (struct kvm_memory_slot *)slot1;
+ s2 = (struct kvm_memory_slot *)slot2;
+
+ if (s1->npages < s2->npages)
+ return 1;
+ if (s1->npages > s2->npages)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Sort the memslots base on its size, so the larger slots
+ * will get better fit.
+ */
+static void sort_memslots(struct kvm_memslots *slots)
+{
+ int i;
+
+ sort(slots->memslots, KVM_MEM_SLOTS_NUM,
+ sizeof(struct kvm_memory_slot), cmp_memslot, NULL);
+
+ for (i = 0; i < KVM_MEM_SLOTS_NUM; i++)
+ slots->id_to_index[slots->memslots[i].id] = i;
+}
+
+void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new)
+{
+ if (new) {
+ int id = new->id;
+ struct kvm_memory_slot *old = id_to_memslot(slots, id);
+ unsigned long npages = old->npages;
+
+ *old = *new;
+ if (new->npages != npages)
+ sort_memslots(slots);
+ }
+
+ slots->generation++;
+}
+
+/*
+ * Allocate some memory and give it an address in the guest physical address
+ * space.
+ *
+ * Discontiguous memory is allowed, mostly for framebuffers.
+ *
+ * Must be called holding mmap_sem for write.
+ */
+int __kvm_set_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ int r;
+ gfn_t base_gfn;
+ unsigned long npages;
+ struct kvm_memory_slot *memslot, *slot;
+ struct kvm_memory_slot old, new;
+ struct kvm_memslots *slots, *old_memslots;
+
+ r = -EINVAL;
+ /* General sanity checks */
+ if (mem->memory_size & (PAGE_SIZE - 1))
+ goto out;
+ if (mem->guest_phys_addr & (PAGE_SIZE - 1))
+ goto out;
+ /* We can read the guest memory with __xxx_user() later on. */
+ if (user_alloc &&
+ ((mem->userspace_addr & (PAGE_SIZE - 1)) ||
+ !access_ok(VERIFY_WRITE,
+ (void __user *)(unsigned long)mem->userspace_addr,
+ mem->memory_size)))
+ goto out;
+ if (mem->slot >= KVM_MEM_SLOTS_NUM)
+ goto out;
+ if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
+ goto out;
+
+ memslot = id_to_memslot(kvm->memslots, mem->slot);
+ base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
+ npages = mem->memory_size >> PAGE_SHIFT;
+
+ r = -EINVAL;
+ if (npages > KVM_MEM_MAX_NR_PAGES)
+ goto out;
+
+ if (!npages)
+ mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
+
+ new = old = *memslot;
+
+ new.id = mem->slot;
+ new.base_gfn = base_gfn;
+ new.npages = npages;
+ new.flags = mem->flags;
+
+ /* Disallow changing a memory slot's size. */
+ r = -EINVAL;
+ if (npages && old.npages && npages != old.npages)
+ goto out_free;
+
+ /* Check for overlaps */
+ r = -EEXIST;
+ kvm_for_each_memslot(slot, kvm->memslots) {
+ if (slot->id >= KVM_MEMORY_SLOTS || slot == memslot)
+ continue;
+ if (!((base_gfn + npages <= slot->base_gfn) ||
+ (base_gfn >= slot->base_gfn + slot->npages)))
+ goto out_free;
+ }
+
+ /* Free page dirty bitmap if unneeded */
+ if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
+ new.dirty_bitmap = NULL;
+
+ r = -ENOMEM;
+
+ /* Allocate if a slot is being created */
+ if (npages && !old.npages) {
+ new.user_alloc = user_alloc;
+ new.userspace_addr = mem->userspace_addr;
+#ifndef CONFIG_S390
+ new.rmap = vzalloc(npages * sizeof(*new.rmap));
+ if (!new.rmap)
+ goto out_free;
+#endif /* not defined CONFIG_S390 */
+ if (kvm_arch_create_memslot(&new, npages))
+ goto out_free;
+ }
+
+ /* Allocate page dirty bitmap if needed */
+ if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
+ if (kvm_create_dirty_bitmap(&new) < 0)
+ goto out_free;
+ /* destroy any largepage mappings for dirty tracking */
+ }
+
+ if (!npages || base_gfn != old.base_gfn) {
+ struct kvm_memory_slot *slot;
+
+ r = -ENOMEM;
+ slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots),
+ GFP_KERNEL);
+ if (!slots)
+ goto out_free;
+ slot = id_to_memslot(slots, mem->slot);
+ slot->flags |= KVM_MEMSLOT_INVALID;
+
+ update_memslots(slots, NULL);
+
+ old_memslots = kvm->memslots;
+ rcu_assign_pointer(kvm->memslots, slots);
+ synchronize_srcu_expedited(&kvm->srcu);
+ /* slot was deleted or moved, clear iommu mapping */
+ kvm_iommu_unmap_pages(kvm, &old);
+ /* From this point no new shadow pages pointing to a deleted,
+ * or moved, memslot will be created.
+ *
+ * validation of sp->gfn happens in:
+ * - gfn_to_hva (kvm_read_guest, gfn_to_pfn)
+ * - kvm_is_visible_gfn (mmu_check_roots)
+ */
+ kvm_arch_flush_shadow(kvm);
+ kfree(old_memslots);
+ }
+
+ r = kvm_arch_prepare_memory_region(kvm, &new, old, mem, user_alloc);
+ if (r)
+ goto out_free;
+
+ r = -ENOMEM;
+ slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots),
+ GFP_KERNEL);
+ if (!slots)
+ goto out_free;
+
+ /* map new memory slot into the iommu */
+ if (npages) {
+ r = kvm_iommu_map_pages(kvm, &new);
+ if (r)
+ goto out_slots;
+ }
+
+ /* actual memory is freed via old in kvm_free_physmem_slot below */
+ if (!npages) {
+ new.rmap = NULL;
+ new.dirty_bitmap = NULL;
+ memset(&new.arch, 0, sizeof(new.arch));
+ }
+
+ update_memslots(slots, &new);
+ old_memslots = kvm->memslots;
+ rcu_assign_pointer(kvm->memslots, slots);
+ synchronize_srcu_expedited(&kvm->srcu);
+
+ kvm_arch_commit_memory_region(kvm, mem, old, user_alloc);
+
+ /*
+ * If the new memory slot is created, we need to clear all
+ * mmio sptes.
+ */
+ if (npages && old.base_gfn != mem->guest_phys_addr >> PAGE_SHIFT)
+ kvm_arch_flush_shadow(kvm);
+
+ kvm_free_physmem_slot(&old, &new);
+ kfree(old_memslots);
+
+ return 0;
+
+out_slots:
+ kfree(slots);
+out_free:
+ kvm_free_physmem_slot(&new, &old);
+out:
+ return r;
+
+}
+EXPORT_SYMBOL_GPL(__kvm_set_memory_region);
+
+int kvm_set_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ int r;
+
+ mutex_lock(&kvm->slots_lock);
+ r = __kvm_set_memory_region(kvm, mem, user_alloc);
+ mutex_unlock(&kvm->slots_lock);
+ return r;
+}
+EXPORT_SYMBOL_GPL(kvm_set_memory_region);
+
+int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
+ struct
+ kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ if (mem->slot >= KVM_MEMORY_SLOTS)
+ return -EINVAL;
+ return kvm_set_memory_region(kvm, mem, user_alloc);
+}
+
+int kvm_get_dirty_log(struct kvm *kvm,
+ struct kvm_dirty_log *log, int *is_dirty)
+{
+ struct kvm_memory_slot *memslot;
+ int r, i;
+ unsigned long n;
+ unsigned long any = 0;
+
+ r = -EINVAL;
+ if (log->slot >= KVM_MEMORY_SLOTS)
+ goto out;
+
+ memslot = id_to_memslot(kvm->memslots, log->slot);
+ r = -ENOENT;
+ if (!memslot->dirty_bitmap)
+ goto out;
+
+ n = kvm_dirty_bitmap_bytes(memslot);
+
+ for (i = 0; !any && i < n/sizeof(long); ++i)
+ any = memslot->dirty_bitmap[i];
+
+ r = -EFAULT;
+ if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
+ goto out;
+
+ if (any)
+ *is_dirty = 1;
+
+ r = 0;
+out:
+ return r;
+}
+
+bool kvm_largepages_enabled(void)
+{
+ return largepages_enabled;
+}
+
+void kvm_disable_largepages(void)
+{
+ largepages_enabled = false;
+}
+EXPORT_SYMBOL_GPL(kvm_disable_largepages);
+
+int is_error_page(struct page *page)
+{
+ return page == bad_page || page == hwpoison_page || page == fault_page;
+}
+EXPORT_SYMBOL_GPL(is_error_page);
+
+int is_error_pfn(pfn_t pfn)
+{
+ return pfn == bad_pfn || pfn == hwpoison_pfn || pfn == fault_pfn;
+}
+EXPORT_SYMBOL_GPL(is_error_pfn);
+
+int is_hwpoison_pfn(pfn_t pfn)
+{
+ return pfn == hwpoison_pfn;
+}
+EXPORT_SYMBOL_GPL(is_hwpoison_pfn);
+
+int is_fault_pfn(pfn_t pfn)
+{
+ return pfn == fault_pfn;
+}
+EXPORT_SYMBOL_GPL(is_fault_pfn);
+
+int is_noslot_pfn(pfn_t pfn)
+{
+ return pfn == bad_pfn;
+}
+EXPORT_SYMBOL_GPL(is_noslot_pfn);
+
+int is_invalid_pfn(pfn_t pfn)
+{
+ return pfn == hwpoison_pfn || pfn == fault_pfn;
+}
+EXPORT_SYMBOL_GPL(is_invalid_pfn);
+
+static inline unsigned long bad_hva(void)
+{
+ return PAGE_OFFSET;
+}
+
+int kvm_is_error_hva(unsigned long addr)
+{
+ return addr == bad_hva();
+}
+EXPORT_SYMBOL_GPL(kvm_is_error_hva);
+
+struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+{
+ return __gfn_to_memslot(kvm_memslots(kvm), gfn);
+}
+EXPORT_SYMBOL_GPL(gfn_to_memslot);
+
+int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
+{
+ struct kvm_memory_slot *memslot = gfn_to_memslot(kvm, gfn);
+
+ if (!memslot || memslot->id >= KVM_MEMORY_SLOTS ||
+ memslot->flags & KVM_MEMSLOT_INVALID)
+ return 0;
+
+ return 1;
+}
+EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
+
+unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn)
+{
+ struct vm_area_struct *vma;
+ unsigned long addr, size;
+
+ size = PAGE_SIZE;
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return PAGE_SIZE;
+
+ down_read(¤t->mm->mmap_sem);
+ vma = find_vma(current->mm, addr);
+ if (!vma)
+ goto out;
+
+ size = vma_kernel_pagesize(vma);
+
+out:
+ up_read(¤t->mm->mmap_sem);
+
+ return size;
+}
+
+static unsigned long gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn,
+ gfn_t *nr_pages)
+{
+ if (!slot || slot->flags & KVM_MEMSLOT_INVALID)
+ return bad_hva();
+
+ if (nr_pages)
+ *nr_pages = slot->npages - (gfn - slot->base_gfn);
+
+ return gfn_to_hva_memslot(slot, gfn);
+}
+
+unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
+{
+ return gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL);
+}
+EXPORT_SYMBOL_GPL(gfn_to_hva);
+
+static pfn_t get_fault_pfn(void)
+{
+ get_page(fault_page);
+ return fault_pfn;
+}
+
+int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm,
+ unsigned long start, int write, struct page **page)
+{
+ int flags = FOLL_TOUCH | FOLL_NOWAIT | FOLL_HWPOISON | FOLL_GET;
+
+ if (write)
+ flags |= FOLL_WRITE;
+
+ return __get_user_pages(tsk, mm, start, 1, flags, page, NULL, NULL);
+}
+
+static inline int check_user_page_hwpoison(unsigned long addr)
+{
+ int rc, flags = FOLL_TOUCH | FOLL_HWPOISON | FOLL_WRITE;
+
+ rc = __get_user_pages(current, current->mm, addr, 1,
+ flags, NULL, NULL, NULL);
+ return rc == -EHWPOISON;
+}
+
+static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic,
+ bool *async, bool write_fault, bool *writable)
+{
+ struct page *page[1];
+ int npages = 0;
+ pfn_t pfn;
+
+ /* we can do it either atomically or asynchronously, not both */
+ BUG_ON(atomic && async);
+
+ BUG_ON(!write_fault && !writable);
+
+ if (writable)
+ *writable = true;
+
+ if (atomic || async)
+ npages = __get_user_pages_fast(addr, 1, 1, page);
+
+ if (unlikely(npages != 1) && !atomic) {
+ might_sleep();
+
+ if (writable)
+ *writable = write_fault;
+
+ if (async) {
+ down_read(¤t->mm->mmap_sem);
+ npages = get_user_page_nowait(current, current->mm,
+ addr, write_fault, page);
+ up_read(¤t->mm->mmap_sem);
+ } else
+ npages = get_user_pages_fast(addr, 1, write_fault,
+ page);
+
+ /* map read fault as writable if possible */
+ if (unlikely(!write_fault) && npages == 1) {
+ struct page *wpage[1];
+
+ npages = __get_user_pages_fast(addr, 1, 1, wpage);
+ if (npages == 1) {
+ *writable = true;
+ put_page(page[0]);
+ page[0] = wpage[0];
+ }
+ npages = 1;
+ }
+ }
+
+ if (unlikely(npages != 1)) {
+ struct vm_area_struct *vma;
+
+ if (atomic)
+ return get_fault_pfn();
+
+ down_read(¤t->mm->mmap_sem);
+ if (npages == -EHWPOISON ||
+ (!async && check_user_page_hwpoison(addr))) {
+ up_read(¤t->mm->mmap_sem);
+ get_page(hwpoison_page);
+ return page_to_pfn(hwpoison_page);
+ }
+
+ vma = find_vma_intersection(current->mm, addr, addr+1);
+
+ if (vma == NULL)
+ pfn = get_fault_pfn();
+ else if ((vma->vm_flags & VM_PFNMAP)) {
+ pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) +
+ vma->vm_pgoff;
+ BUG_ON(!kvm_is_mmio_pfn(pfn));
+ } else {
+ if (async && (vma->vm_flags & VM_WRITE))
+ *async = true;
+ pfn = get_fault_pfn();
+ }
+ up_read(¤t->mm->mmap_sem);
+ } else
+ pfn = page_to_pfn(page[0]);
+
+ return pfn;
+}
+
+pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr)
+{
+ return hva_to_pfn(kvm, addr, true, NULL, true, NULL);
+}
+EXPORT_SYMBOL_GPL(hva_to_pfn_atomic);
+
+static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic, bool *async,
+ bool write_fault, bool *writable)
+{
+ unsigned long addr;
+
+ if (async)
+ *async = false;
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr)) {
+ get_page(bad_page);
+ return page_to_pfn(bad_page);
+ }
+
+ return hva_to_pfn(kvm, addr, atomic, async, write_fault, writable);
+}
+
+pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn)
+{
+ return __gfn_to_pfn(kvm, gfn, true, NULL, true, NULL);
+}
+EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic);
+
+pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
+ bool write_fault, bool *writable)
+{
+ return __gfn_to_pfn(kvm, gfn, false, async, write_fault, writable);
+}
+EXPORT_SYMBOL_GPL(gfn_to_pfn_async);
+
+pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn)
+{
+ return __gfn_to_pfn(kvm, gfn, false, NULL, true, NULL);
+}
+EXPORT_SYMBOL_GPL(gfn_to_pfn);
+
+pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
+ bool *writable)
+{
+ return __gfn_to_pfn(kvm, gfn, false, NULL, write_fault, writable);
+}
+EXPORT_SYMBOL_GPL(gfn_to_pfn_prot);
+
+pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
+ struct kvm_memory_slot *slot, gfn_t gfn)
+{
+ unsigned long addr = gfn_to_hva_memslot(slot, gfn);
+ return hva_to_pfn(kvm, addr, false, NULL, true, NULL);
+}
+
+int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
+ int nr_pages)
+{
+ unsigned long addr;
+ gfn_t entry;
+
+ addr = gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, &entry);
+ if (kvm_is_error_hva(addr))
+ return -1;
+
+ if (entry < nr_pages)
+ return 0;
+
+ return __get_user_pages_fast(addr, nr_pages, 1, pages);
+}
+EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic);
+
+struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
+{
+ pfn_t pfn;
+
+ pfn = gfn_to_pfn(kvm, gfn);
+ if (!kvm_is_mmio_pfn(pfn))
+ return pfn_to_page(pfn);
+
+ WARN_ON(kvm_is_mmio_pfn(pfn));
+
+ get_page(bad_page);
+ return bad_page;
+}
+
+EXPORT_SYMBOL_GPL(gfn_to_page);
+
+void kvm_release_page_clean(struct page *page)
+{
+ kvm_release_pfn_clean(page_to_pfn(page));
+}
+EXPORT_SYMBOL_GPL(kvm_release_page_clean);
+
+void kvm_release_pfn_clean(pfn_t pfn)
+{
+ if (!kvm_is_mmio_pfn(pfn))
+ put_page(pfn_to_page(pfn));
+}
+EXPORT_SYMBOL_GPL(kvm_release_pfn_clean);
+
+void kvm_release_page_dirty(struct page *page)
+{
+ kvm_release_pfn_dirty(page_to_pfn(page));
+}
+EXPORT_SYMBOL_GPL(kvm_release_page_dirty);
+
+void kvm_release_pfn_dirty(pfn_t pfn)
+{
+ kvm_set_pfn_dirty(pfn);
+ kvm_release_pfn_clean(pfn);
+}
+EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty);
+
+void kvm_set_page_dirty(struct page *page)
+{
+ kvm_set_pfn_dirty(page_to_pfn(page));
+}
+EXPORT_SYMBOL_GPL(kvm_set_page_dirty);
+
+void kvm_set_pfn_dirty(pfn_t pfn)
+{
+ if (!kvm_is_mmio_pfn(pfn)) {
+ struct page *page = pfn_to_page(pfn);
+ if (!PageReserved(page))
+ SetPageDirty(page);
+ }
+}
+EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty);
+
+void kvm_set_pfn_accessed(pfn_t pfn)
+{
+ if (!kvm_is_mmio_pfn(pfn))
+ mark_page_accessed(pfn_to_page(pfn));
+}
+EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed);
+
+void kvm_get_pfn(pfn_t pfn)
+{
+ if (!kvm_is_mmio_pfn(pfn))
+ get_page(pfn_to_page(pfn));
+}
+EXPORT_SYMBOL_GPL(kvm_get_pfn);
+
+static int next_segment(unsigned long len, int offset)
+{
+ if (len > PAGE_SIZE - offset)
+ return PAGE_SIZE - offset;
+ else
+ return len;
+}
+
+int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
+ int len)
+{
+ int r;
+ unsigned long addr;
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return -EFAULT;
+ r = __copy_from_user(data, (void __user *)addr + offset, len);
+ if (r)
+ return -EFAULT;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_read_guest_page);
+
+int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
+{
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
+
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ data += seg;
+ ++gfn;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_read_guest);
+
+int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
+ unsigned long len)
+{
+ int r;
+ unsigned long addr;
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int offset = offset_in_page(gpa);
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return -EFAULT;
+ pagefault_disable();
+ r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len);
+ pagefault_enable();
+ if (r)
+ return -EFAULT;
+ return 0;
+}
+EXPORT_SYMBOL(kvm_read_guest_atomic);
+
+int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
+ int offset, int len)
+{
+ int r;
+ unsigned long addr;
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return -EFAULT;
+ r = __copy_to_user((void __user *)addr + offset, data, len);
+ if (r)
+ return -EFAULT;
+ mark_page_dirty(kvm, gfn);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_write_guest_page);
+
+int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
+ unsigned long len)
+{
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
+
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ data += seg;
+ ++gfn;
+ }
+ return 0;
+}
+
+int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+ gpa_t gpa, unsigned long len)
+{
+ struct kvm_memslots *slots = kvm_memslots(kvm);
+ int offset = offset_in_page(gpa);
+ gfn_t start_gfn = gpa >> PAGE_SHIFT;
+ gfn_t end_gfn = (gpa + len - 1) >> PAGE_SHIFT;
+ gfn_t nr_pages_needed = end_gfn - start_gfn + 1;
+ gfn_t nr_pages_avail;
+
+ ghc->gpa = gpa;
+ ghc->generation = slots->generation;
+ ghc->len = len;
+ ghc->memslot = gfn_to_memslot(kvm, start_gfn);
+ ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, &nr_pages_avail);
+ if (!kvm_is_error_hva(ghc->hva) && nr_pages_avail >= nr_pages_needed) {
+ ghc->hva += offset;
+ } else {
+ /*
+ * If the requested region crosses two memslots, we still
+ * verify that the entire region is valid here.
+ */
+ while (start_gfn <= end_gfn) {
+ ghc->memslot = gfn_to_memslot(kvm, start_gfn);
+ ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn,
+ &nr_pages_avail);
+ if (kvm_is_error_hva(ghc->hva))
+ return -EFAULT;
+ start_gfn += nr_pages_avail;
+ }
+ /* Use the slow path for cross page reads and writes. */
+ ghc->memslot = NULL;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init);
+
+int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+ void *data, unsigned long len)
+{
+ struct kvm_memslots *slots = kvm_memslots(kvm);
+ int r;
+
+ BUG_ON(len > ghc->len);
+
+ if (slots->generation != ghc->generation)
+ kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len);
+
+ if (unlikely(!ghc->memslot))
+ return kvm_write_guest(kvm, ghc->gpa, data, len);
+
+ if (kvm_is_error_hva(ghc->hva))
+ return -EFAULT;
+
+ r = __copy_to_user((void __user *)ghc->hva, data, len);
+ if (r)
+ return -EFAULT;
+ mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_write_guest_cached);
+
+int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+ void *data, unsigned long len)
+{
+ struct kvm_memslots *slots = kvm_memslots(kvm);
+ int r;
+
+ BUG_ON(len > ghc->len);
+
+ if (slots->generation != ghc->generation)
+ kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len);
+
+ if (unlikely(!ghc->memslot))
+ return kvm_read_guest(kvm, ghc->gpa, data, len);
+
+ if (kvm_is_error_hva(ghc->hva))
+ return -EFAULT;
+
+ r = __copy_from_user(data, (void __user *)ghc->hva, len);
+ if (r)
+ return -EFAULT;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_read_guest_cached);
+
+int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
+{
+ return kvm_write_guest_page(kvm, gfn, (const void *) empty_zero_page,
+ offset, len);
+}
+EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
+
+int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
+{
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
+
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ ++gfn;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_clear_guest);
+
+void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
+ gfn_t gfn)
+{
+ if (memslot && memslot->dirty_bitmap) {
+ unsigned long rel_gfn = gfn - memslot->base_gfn;
+
+ if (!test_and_set_bit_le(rel_gfn, memslot->dirty_bitmap))
+ memslot->nr_dirty_pages++;
+ }
+}
+
+void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
+{
+ struct kvm_memory_slot *memslot;
+
+ memslot = gfn_to_memslot(kvm, gfn);
+ mark_page_dirty_in_slot(kvm, memslot, gfn);
+}
+
+/*
+ * The vCPU has executed a HLT instruction with in-kernel mode enabled.
+ */
+void kvm_vcpu_block(struct kvm_vcpu *vcpu)
+{
+ DEFINE_WAIT(wait);
+
+ for (;;) {
+ prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE);
+
+ if (kvm_arch_vcpu_runnable(vcpu)) {
+ kvm_make_request(KVM_REQ_UNHALT, vcpu);
+ break;
+ }
+ if (kvm_cpu_has_pending_timer(vcpu))
+ break;
+ if (signal_pending(current))
+ break;
+
+ schedule();
+ }
+
+ finish_wait(&vcpu->wq, &wait);
+}
+
+void kvm_resched(struct kvm_vcpu *vcpu)
+{
+ if (!need_resched())
+ return;
+ cond_resched();
+}
+EXPORT_SYMBOL_GPL(kvm_resched);
+
+void kvm_vcpu_on_spin(struct kvm_vcpu *me)
+{
+ struct kvm *kvm = me->kvm;
+ struct kvm_vcpu *vcpu;
+ int last_boosted_vcpu = me->kvm->last_boosted_vcpu;
+ int yielded = 0;
+ int pass;
+ int i;
+
+ /*
+ * We boost the priority of a VCPU that is runnable but not
+ * currently running, because it got preempted by something
+ * else and called schedule in __vcpu_run. Hopefully that
+ * VCPU is holding the lock that we need and will release it.
+ * We approximate round-robin by starting at the last boosted VCPU.
+ */
+ for (pass = 0; pass < 2 && !yielded; pass++) {
+ kvm_for_each_vcpu(i, vcpu, kvm) {
+ struct task_struct *task = NULL;
+ struct pid *pid;
+ if (!pass && i < last_boosted_vcpu) {
+ i = last_boosted_vcpu;
+ continue;
+ } else if (pass && i > last_boosted_vcpu)
+ break;
+ if (vcpu == me)
+ continue;
+ if (waitqueue_active(&vcpu->wq))
+ continue;
+ rcu_read_lock();
+ pid = rcu_dereference(vcpu->pid);
+ if (pid)
+ task = get_pid_task(vcpu->pid, PIDTYPE_PID);
+ rcu_read_unlock();
+ if (!task)
+ continue;
+ if (task->flags & PF_VCPU) {
+ put_task_struct(task);
+ continue;
+ }
+ if (yield_to(task, 1)) {
+ put_task_struct(task);
+ kvm->last_boosted_vcpu = i;
+ yielded = 1;
+ break;
+ }
+ put_task_struct(task);
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(kvm_vcpu_on_spin);
+
+static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct kvm_vcpu *vcpu = vma->vm_file->private_data;
+ struct page *page;
+
+ if (vmf->pgoff == 0)
+ page = virt_to_page(vcpu->run);
+#ifdef CONFIG_X86
+ else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
+ page = virt_to_page(vcpu->arch.pio_data);
+#endif
+#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
+ else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET)
+ page = virt_to_page(vcpu->kvm->coalesced_mmio_ring);
+#endif
+ else
+ return kvm_arch_vcpu_fault(vcpu, vmf);
+ get_page(page);
+ vmf->page = page;
+ return 0;
+}
+
+static const struct vm_operations_struct kvm_vcpu_vm_ops = {
+ .fault = kvm_vcpu_fault,
+};
+
+static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ vma->vm_ops = &kvm_vcpu_vm_ops;
+ return 0;
+}
+
+static int kvm_vcpu_release(struct inode *inode, struct file *filp)
+{
+ struct kvm_vcpu *vcpu = filp->private_data;
+
+ kvm_put_kvm(vcpu->kvm);
+ return 0;
+}
+
+static struct file_operations kvm_vcpu_fops = {
+ .release = kvm_vcpu_release,
+ .unlocked_ioctl = kvm_vcpu_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = kvm_vcpu_compat_ioctl,
+#endif
+ .mmap = kvm_vcpu_mmap,
+ .llseek = noop_llseek,
+};
+
+/*
+ * Allocates an inode for the vcpu.
+ */
+static int create_vcpu_fd(struct kvm_vcpu *vcpu)
+{
+ return anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, O_RDWR);
+}
+
+/*
+ * Creates some virtual cpus. Good luck creating more than one.
+ */
+static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
+{
+ int r;
+ struct kvm_vcpu *vcpu, *v;
+
+ if (id >= KVM_MAX_VCPUS)
+ return -EINVAL;
+
+ vcpu = kvm_arch_vcpu_create(kvm, id);
+ if (IS_ERR(vcpu))
+ return PTR_ERR(vcpu);
+
+ preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
+
+ r = kvm_arch_vcpu_setup(vcpu);
+ if (r)
+ goto vcpu_destroy;
+
+ mutex_lock(&kvm->lock);
+ if (!kvm_vcpu_compatible(vcpu)) {
+ r = -EINVAL;
+ goto unlock_vcpu_destroy;
+ }
+ if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) {
+ r = -EINVAL;
+ goto unlock_vcpu_destroy;
+ }
+
+ kvm_for_each_vcpu(r, v, kvm)
+ if (v->vcpu_id == id) {
+ r = -EEXIST;
+ goto unlock_vcpu_destroy;
+ }
+
+ BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]);
+
+ /* Now it's all set up, let userspace reach it */
+ kvm_get_kvm(kvm);
+ r = create_vcpu_fd(vcpu);
+ if (r < 0) {
+ kvm_put_kvm(kvm);
+ goto unlock_vcpu_destroy;
+ }
+
+ kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu;
+ smp_wmb();
+ atomic_inc(&kvm->online_vcpus);
+
+ mutex_unlock(&kvm->lock);
+ return r;
+
+unlock_vcpu_destroy:
+ mutex_unlock(&kvm->lock);
+vcpu_destroy:
+ kvm_arch_vcpu_destroy(vcpu);
+ return r;
+}
+
+static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
+{
+ if (sigset) {
+ sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
+ vcpu->sigset_active = 1;
+ vcpu->sigset = *sigset;
+ } else
+ vcpu->sigset_active = 0;
+ return 0;
+}
+
+static long kvm_vcpu_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ struct kvm_vcpu *vcpu = filp->private_data;
+ void __user *argp = (void __user *)arg;
+ int r;
+ struct kvm_fpu *fpu = NULL;
+ struct kvm_sregs *kvm_sregs = NULL;
+
+ if (vcpu->kvm->mm != current->mm)
+ return -EIO;
+
+ if (unlikely(_IOC_TYPE(ioctl) != KVMIO))
+ return -EINVAL;
+
+#if defined(CONFIG_S390) || defined(CONFIG_PPC)
+ /*
+ * Special cases: vcpu ioctls that are asynchronous to vcpu execution,
+ * so vcpu_load() would break it.
+ */
+ if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_INTERRUPT)
+ return kvm_arch_vcpu_ioctl(filp, ioctl, arg);
+#endif
+
+
+ vcpu_load(vcpu);
+ switch (ioctl) {
+ case KVM_RUN:
+ r = -EINVAL;
+ if (arg)
+ goto out;
+ r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
+ trace_kvm_userspace_exit(vcpu->run->exit_reason, r);
+ break;
+ case KVM_GET_REGS: {
+ struct kvm_regs *kvm_regs;
+
+ r = -ENOMEM;
+ kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL);
+ if (!kvm_regs)
+ goto out;
+ r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs);
+ if (r)
+ goto out_free1;
+ r = -EFAULT;
+ if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs)))
+ goto out_free1;
+ r = 0;
+out_free1:
+ kfree(kvm_regs);
+ break;
+ }
+ case KVM_SET_REGS: {
+ struct kvm_regs *kvm_regs;
+
+ r = -ENOMEM;
+ kvm_regs = memdup_user(argp, sizeof(*kvm_regs));
+ if (IS_ERR(kvm_regs)) {
+ r = PTR_ERR(kvm_regs);
+ goto out;
+ }
+ r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs);
+ if (r)
+ goto out_free2;
+ r = 0;
+out_free2:
+ kfree(kvm_regs);
+ break;
+ }
+ case KVM_GET_SREGS: {
+ kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL);
+ r = -ENOMEM;
+ if (!kvm_sregs)
+ goto out;
+ r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs)))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_SREGS: {
+ kvm_sregs = memdup_user(argp, sizeof(*kvm_sregs));
+ if (IS_ERR(kvm_sregs)) {
+ r = PTR_ERR(kvm_sregs);
+ goto out;
+ }
+ r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_GET_MP_STATE: {
+ struct kvm_mp_state mp_state;
+
+ r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, &mp_state, sizeof mp_state))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_MP_STATE: {
+ struct kvm_mp_state mp_state;
+
+ r = -EFAULT;
+ if (copy_from_user(&mp_state, argp, sizeof mp_state))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_TRANSLATE: {
+ struct kvm_translation tr;
+
+ r = -EFAULT;
+ if (copy_from_user(&tr, argp, sizeof tr))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, &tr, sizeof tr))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_GUEST_DEBUG: {
+ struct kvm_guest_debug dbg;
+
+ r = -EFAULT;
+ if (copy_from_user(&dbg, argp, sizeof dbg))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_SIGNAL_MASK: {
+ struct kvm_signal_mask __user *sigmask_arg = argp;
+ struct kvm_signal_mask kvm_sigmask;
+ sigset_t sigset, *p;
+
+ p = NULL;
+ if (argp) {
+ r = -EFAULT;
+ if (copy_from_user(&kvm_sigmask, argp,
+ sizeof kvm_sigmask))
+ goto out;
+ r = -EINVAL;
+ if (kvm_sigmask.len != sizeof sigset)
+ goto out;
+ r = -EFAULT;
+ if (copy_from_user(&sigset, sigmask_arg->sigset,
+ sizeof sigset))
+ goto out;
+ p = &sigset;
+ }
+ r = kvm_vcpu_ioctl_set_sigmask(vcpu, p);
+ break;
+ }
+ case KVM_GET_FPU: {
+ fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL);
+ r = -ENOMEM;
+ if (!fpu)
+ goto out;
+ r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu)))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_FPU: {
+ fpu = memdup_user(argp, sizeof(*fpu));
+ if (IS_ERR(fpu)) {
+ r = PTR_ERR(fpu);
+ goto out;
+ }
+ r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ default:
+ r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
+ }
+out:
+ vcpu_put(vcpu);
+ kfree(fpu);
+ kfree(kvm_sregs);
+ return r;
+}
+
+#ifdef CONFIG_COMPAT
+static long kvm_vcpu_compat_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ struct kvm_vcpu *vcpu = filp->private_data;
+ void __user *argp = compat_ptr(arg);
+ int r;
+
+ if (vcpu->kvm->mm != current->mm)
+ return -EIO;
+
+ switch (ioctl) {
+ case KVM_SET_SIGNAL_MASK: {
+ struct kvm_signal_mask __user *sigmask_arg = argp;
+ struct kvm_signal_mask kvm_sigmask;
+ compat_sigset_t csigset;
+ sigset_t sigset;
+
+ if (argp) {
+ r = -EFAULT;
+ if (copy_from_user(&kvm_sigmask, argp,
+ sizeof kvm_sigmask))
+ goto out;
+ r = -EINVAL;
+ if (kvm_sigmask.len != sizeof csigset)
+ goto out;
+ r = -EFAULT;
+ if (copy_from_user(&csigset, sigmask_arg->sigset,
+ sizeof csigset))
+ goto out;
+ }
+ sigset_from_compat(&sigset, &csigset);
+ r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
+ break;
+ }
+ default:
+ r = kvm_vcpu_ioctl(filp, ioctl, arg);
+ }
+
+out:
+ return r;
+}
+#endif
+
+static long kvm_vm_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ struct kvm *kvm = filp->private_data;
+ void __user *argp = (void __user *)arg;
+ int r;
+
+ if (kvm->mm != current->mm)
+ return -EIO;
+ switch (ioctl) {
+ case KVM_CREATE_VCPU:
+ r = kvm_vm_ioctl_create_vcpu(kvm, arg);
+ if (r < 0)
+ goto out;
+ break;
+ case KVM_SET_USER_MEMORY_REGION: {
+ struct kvm_userspace_memory_region kvm_userspace_mem;
+
+ r = -EFAULT;
+ if (copy_from_user(&kvm_userspace_mem, argp,
+ sizeof kvm_userspace_mem))
+ goto out;
+
+ r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
+ if (r)
+ goto out;
+ break;
+ }
+ case KVM_GET_DIRTY_LOG: {
+ struct kvm_dirty_log log;
+
+ r = -EFAULT;
+ if (copy_from_user(&log, argp, sizeof log))
+ goto out;
+ r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
+ if (r)
+ goto out;
+ break;
+ }
+#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
+ case KVM_REGISTER_COALESCED_MMIO: {
+ struct kvm_coalesced_mmio_zone zone;
+ r = -EFAULT;
+ if (copy_from_user(&zone, argp, sizeof zone))
+ goto out;
+ r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_UNREGISTER_COALESCED_MMIO: {
+ struct kvm_coalesced_mmio_zone zone;
+ r = -EFAULT;
+ if (copy_from_user(&zone, argp, sizeof zone))
+ goto out;
+ r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+#endif
+ case KVM_IRQFD: {
+ struct kvm_irqfd data;
+
+ r = -EFAULT;
+ if (copy_from_user(&data, argp, sizeof data))
+ goto out;
+ r = kvm_irqfd(kvm, data.fd, data.gsi, data.flags);
+ break;
+ }
+ case KVM_IOEVENTFD: {
+ struct kvm_ioeventfd data;
+
+ r = -EFAULT;
+ if (copy_from_user(&data, argp, sizeof data))
+ goto out;
+ r = kvm_ioeventfd(kvm, &data);
+ break;
+ }
+#ifdef CONFIG_KVM_APIC_ARCHITECTURE
+ case KVM_SET_BOOT_CPU_ID:
+ r = 0;
+ mutex_lock(&kvm->lock);
+ if (atomic_read(&kvm->online_vcpus) != 0)
+ r = -EBUSY;
+ else
+ kvm->bsp_vcpu_id = arg;
+ mutex_unlock(&kvm->lock);
+ break;
+#endif
+ default:
+ r = kvm_arch_vm_ioctl(filp, ioctl, arg);
+ if (r == -ENOTTY)
+ r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg);
+ }
+out:
+ return r;
+}
+
+#ifdef CONFIG_COMPAT
+struct compat_kvm_dirty_log {
+ __u32 slot;
+ __u32 padding1;
+ union {
+ compat_uptr_t dirty_bitmap; /* one bit per page */
+ __u64 padding2;
+ };
+};
+
+static long kvm_vm_compat_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ struct kvm *kvm = filp->private_data;
+ int r;
+
+ if (kvm->mm != current->mm)
+ return -EIO;
+ switch (ioctl) {
+ case KVM_GET_DIRTY_LOG: {
+ struct compat_kvm_dirty_log compat_log;
+ struct kvm_dirty_log log;
+
+ r = -EFAULT;
+ if (copy_from_user(&compat_log, (void __user *)arg,
+ sizeof(compat_log)))
+ goto out;
+ log.slot = compat_log.slot;
+ log.padding1 = compat_log.padding1;
+ log.padding2 = compat_log.padding2;
+ log.dirty_bitmap = compat_ptr(compat_log.dirty_bitmap);
+
+ r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
+ if (r)
+ goto out;
+ break;
+ }
+ default:
+ r = kvm_vm_ioctl(filp, ioctl, arg);
+ }
+
+out:
+ return r;
+}
+#endif
+
+static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct page *page[1];
+ unsigned long addr;
+ int npages;
+ gfn_t gfn = vmf->pgoff;
+ struct kvm *kvm = vma->vm_file->private_data;
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return VM_FAULT_SIGBUS;
+
+ npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page,
+ NULL);
+ if (unlikely(npages != 1))
+ return VM_FAULT_SIGBUS;
+
+ vmf->page = page[0];
+ return 0;
+}
+
+static const struct vm_operations_struct kvm_vm_vm_ops = {
+ .fault = kvm_vm_fault,
+};
+
+static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ vma->vm_ops = &kvm_vm_vm_ops;
+ return 0;
+}
+
+static struct file_operations kvm_vm_fops = {
+ .release = kvm_vm_release,
+ .unlocked_ioctl = kvm_vm_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = kvm_vm_compat_ioctl,
+#endif
+ .mmap = kvm_vm_mmap,
+ .llseek = noop_llseek,
+};
+
+static int kvm_dev_ioctl_create_vm(unsigned long type)
+{
+ int r;
+ struct kvm *kvm;
+
+ kvm = kvm_create_vm(type);
+ if (IS_ERR(kvm))
+ return PTR_ERR(kvm);
+#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
+ r = kvm_coalesced_mmio_init(kvm);
+ if (r < 0) {
+ kvm_put_kvm(kvm);
+ return r;
+ }
+#endif
+ r = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR);
+ if (r < 0)
+ kvm_put_kvm(kvm);
+
+ return r;
+}
+
+static long kvm_dev_ioctl_check_extension_generic(long arg)
+{
+ switch (arg) {
+ case KVM_CAP_USER_MEMORY:
+ case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
+ case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS:
+#ifdef CONFIG_KVM_APIC_ARCHITECTURE
+ case KVM_CAP_SET_BOOT_CPU_ID:
+#endif
+ case KVM_CAP_INTERNAL_ERROR_DATA:
+ return 1;
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
+ case KVM_CAP_IRQ_ROUTING:
+ return KVM_MAX_IRQ_ROUTES;
+#endif
+ default:
+ break;
+ }
+ return kvm_dev_ioctl_check_extension(arg);
+}
+
+static long kvm_dev_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ long r = -EINVAL;
+
+ switch (ioctl) {
+ case KVM_GET_API_VERSION:
+ r = -EINVAL;
+ if (arg)
+ goto out;
+ r = KVM_API_VERSION;
+ break;
+ case KVM_CREATE_VM:
+ r = kvm_dev_ioctl_create_vm(arg);
+ break;
+ case KVM_CHECK_EXTENSION:
+ r = kvm_dev_ioctl_check_extension_generic(arg);
+ break;
+ case KVM_GET_VCPU_MMAP_SIZE:
+ r = -EINVAL;
+ if (arg)
+ goto out;
+ r = PAGE_SIZE; /* struct kvm_run */
+#ifdef CONFIG_X86
+ r += PAGE_SIZE; /* pio data page */
+#endif
+#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
+ r += PAGE_SIZE; /* coalesced mmio ring page */
+#endif
+ break;
+ case KVM_TRACE_ENABLE:
+ case KVM_TRACE_PAUSE:
+ case KVM_TRACE_DISABLE:
+ r = -EOPNOTSUPP;
+ break;
+ default:
+ return kvm_arch_dev_ioctl(filp, ioctl, arg);
+ }
+out:
+ return r;
+}
+
+static struct file_operations kvm_chardev_ops = {
+ .unlocked_ioctl = kvm_dev_ioctl,
+ .compat_ioctl = kvm_dev_ioctl,
+ .llseek = noop_llseek,
+};
+
+static struct miscdevice kvm_dev = {
+ KVM_MINOR,
+ "kvm",
+ &kvm_chardev_ops,
+};
+
+static void hardware_enable_nolock(void *junk)
+{
+ int cpu = raw_smp_processor_id();
+ int r;
+
+ if (cpumask_test_cpu(cpu, cpus_hardware_enabled))
+ return;
+
+ cpumask_set_cpu(cpu, cpus_hardware_enabled);
+
+ r = kvm_arch_hardware_enable(NULL);
+
+ if (r) {
+ cpumask_clear_cpu(cpu, cpus_hardware_enabled);
+ atomic_inc(&hardware_enable_failed);
+ printk(KERN_INFO "kvm: enabling virtualization on "
+ "CPU%d failed\n", cpu);
+ }
+}
+
+static void hardware_enable(void *junk)
+{
+ raw_spin_lock(&kvm_lock);
+ hardware_enable_nolock(junk);
+ raw_spin_unlock(&kvm_lock);
+}
+
+static void hardware_disable_nolock(void *junk)
+{
+ int cpu = raw_smp_processor_id();
+
+ if (!cpumask_test_cpu(cpu, cpus_hardware_enabled))
+ return;
+ cpumask_clear_cpu(cpu, cpus_hardware_enabled);
+ kvm_arch_hardware_disable(NULL);
+}
+
+static void hardware_disable(void *junk)
+{
+ raw_spin_lock(&kvm_lock);
+ hardware_disable_nolock(junk);
+ raw_spin_unlock(&kvm_lock);
+}
+
+static void hardware_disable_all_nolock(void)
+{
+ BUG_ON(!kvm_usage_count);
+
+ kvm_usage_count--;
+ if (!kvm_usage_count)
+ on_each_cpu(hardware_disable_nolock, NULL, 1);
+}
+
+static void hardware_disable_all(void)
+{
+ raw_spin_lock(&kvm_lock);
+ hardware_disable_all_nolock();
+ raw_spin_unlock(&kvm_lock);
+}
+
+static int hardware_enable_all(void)
+{
+ int r = 0;
+
+ raw_spin_lock(&kvm_lock);
+
+ kvm_usage_count++;
+ if (kvm_usage_count == 1) {
+ atomic_set(&hardware_enable_failed, 0);
+ on_each_cpu(hardware_enable_nolock, NULL, 1);
+
+ if (atomic_read(&hardware_enable_failed)) {
+ hardware_disable_all_nolock();
+ r = -EBUSY;
+ }
+ }
+
+ raw_spin_unlock(&kvm_lock);
+
+ return r;
+}
+
+static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
+ void *v)
+{
+ int cpu = (long)v;
+
+ if (!kvm_usage_count)
+ return NOTIFY_OK;
+
+ val &= ~CPU_TASKS_FROZEN;
+ switch (val) {
+ case CPU_DYING:
+ printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
+ cpu);
+ hardware_disable(NULL);
+ break;
+ case CPU_STARTING:
+ printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
+ cpu);
+ hardware_enable(NULL);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+
+asmlinkage void kvm_spurious_fault(void)
+{
+ /* Fault while not rebooting. We want the trace. */
+ BUG();
+}
+EXPORT_SYMBOL_GPL(kvm_spurious_fault);
+
+static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
+ void *v)
+{
+ /*
+ * Some (well, at least mine) BIOSes hang on reboot if
+ * in vmx root mode.
+ *
+ * And Intel TXT required VMX off for all cpu when system shutdown.
+ */
+ printk(KERN_INFO "kvm: exiting hardware virtualization\n");
+ kvm_rebooting = true;
+ on_each_cpu(hardware_disable_nolock, NULL, 1);
+ return NOTIFY_OK;
+}
+
+static struct notifier_block kvm_reboot_notifier = {
+ .notifier_call = kvm_reboot,
+ .priority = 0,
+};
+
+static void kvm_io_bus_destroy(struct kvm_io_bus *bus)
+{
+ int i;
+
+ for (i = 0; i < bus->dev_count; i++) {
+ struct kvm_io_device *pos = bus->range[i].dev;
+
+ kvm_iodevice_destructor(pos);
+ }
+ kfree(bus);
+}
+
+int kvm_io_bus_sort_cmp(const void *p1, const void *p2)
+{
+ const struct kvm_io_range *r1 = p1;
+ const struct kvm_io_range *r2 = p2;
+
+ if (r1->addr < r2->addr)
+ return -1;
+ if (r1->addr + r1->len > r2->addr + r2->len)
+ return 1;
+ return 0;
+}
+
+int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev,
+ gpa_t addr, int len)
+{
+ if (bus->dev_count == NR_IOBUS_DEVS)
+ return -ENOSPC;
+
+ bus->range[bus->dev_count++] = (struct kvm_io_range) {
+ .addr = addr,
+ .len = len,
+ .dev = dev,
+ };
+
+ sort(bus->range, bus->dev_count, sizeof(struct kvm_io_range),
+ kvm_io_bus_sort_cmp, NULL);
+
+ return 0;
+}
+
+int kvm_io_bus_get_first_dev(struct kvm_io_bus *bus,
+ gpa_t addr, int len)
+{
+ struct kvm_io_range *range, key;
+ int off;
+
+ key = (struct kvm_io_range) {
+ .addr = addr,
+ .len = len,
+ };
+
+ range = bsearch(&key, bus->range, bus->dev_count,
+ sizeof(struct kvm_io_range), kvm_io_bus_sort_cmp);
+ if (range == NULL)
+ return -ENOENT;
+
+ off = range - bus->range;
+
+ while (off > 0 && kvm_io_bus_sort_cmp(&key, &bus->range[off-1]) == 0)
+ off--;
+
+ return off;
+}
+
+/* kvm_io_bus_write - called under kvm->slots_lock */
+int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
+ int len, const void *val)
+{
+ int idx;
+ struct kvm_io_bus *bus;
+ struct kvm_io_range range;
+
+ range = (struct kvm_io_range) {
+ .addr = addr,
+ .len = len,
+ };
+
+ bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu);
+ idx = kvm_io_bus_get_first_dev(bus, addr, len);
+ if (idx < 0)
+ return -EOPNOTSUPP;
+
+ while (idx < bus->dev_count &&
+ kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) {
+ if (!kvm_iodevice_write(bus->range[idx].dev, addr, len, val))
+ return 0;
+ idx++;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+/* kvm_io_bus_read - called under kvm->slots_lock */
+int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
+ int len, void *val)
+{
+ int idx;
+ struct kvm_io_bus *bus;
+ struct kvm_io_range range;
+
+ range = (struct kvm_io_range) {
+ .addr = addr,
+ .len = len,
+ };
+
+ bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu);
+ idx = kvm_io_bus_get_first_dev(bus, addr, len);
+ if (idx < 0)
+ return -EOPNOTSUPP;
+
+ while (idx < bus->dev_count &&
+ kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) {
+ if (!kvm_iodevice_read(bus->range[idx].dev, addr, len, val))
+ return 0;
+ idx++;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+/* Caller must hold slots_lock. */
+int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
+ int len, struct kvm_io_device *dev)
+{
+ struct kvm_io_bus *new_bus, *bus;
+
+ bus = kvm->buses[bus_idx];
+ if (bus->dev_count > NR_IOBUS_DEVS-1)
+ return -ENOSPC;
+
+ new_bus = kmemdup(bus, sizeof(struct kvm_io_bus), GFP_KERNEL);
+ if (!new_bus)
+ return -ENOMEM;
+ kvm_io_bus_insert_dev(new_bus, dev, addr, len);
+ rcu_assign_pointer(kvm->buses[bus_idx], new_bus);
+ synchronize_srcu_expedited(&kvm->srcu);
+ kfree(bus);
+
+ return 0;
+}
+
+/* Caller must hold slots_lock. */
+int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
+ struct kvm_io_device *dev)
+{
+ int i, r;
+ struct kvm_io_bus *new_bus, *bus;
+
+ bus = kvm->buses[bus_idx];
+
+ new_bus = kmemdup(bus, sizeof(*bus), GFP_KERNEL);
+ if (!new_bus)
+ return -ENOMEM;
+
+ r = -ENOENT;
+ for (i = 0; i < new_bus->dev_count; i++)
+ if (new_bus->range[i].dev == dev) {
+ r = 0;
+ new_bus->dev_count--;
+ new_bus->range[i] = new_bus->range[new_bus->dev_count];
+ sort(new_bus->range, new_bus->dev_count,
+ sizeof(struct kvm_io_range),
+ kvm_io_bus_sort_cmp, NULL);
+ break;
+ }
+
+ if (r) {
+ kfree(new_bus);
+ return r;
+ }
+
+ rcu_assign_pointer(kvm->buses[bus_idx], new_bus);
+ synchronize_srcu_expedited(&kvm->srcu);
+ kfree(bus);
+ return r;
+}
+
+static struct notifier_block kvm_cpu_notifier = {
+ .notifier_call = kvm_cpu_hotplug,
+};
+
+static int vm_stat_get(void *_offset, u64 *val)
+{
+ unsigned offset = (long)_offset;
+ struct kvm *kvm;
+
+ *val = 0;
+ raw_spin_lock(&kvm_lock);
+ list_for_each_entry(kvm, &vm_list, vm_list)
+ *val += *(u32 *)((void *)kvm + offset);
+ raw_spin_unlock(&kvm_lock);
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n");
+
+static int vcpu_stat_get(void *_offset, u64 *val)
+{
+ unsigned offset = (long)_offset;
+ struct kvm *kvm;
+ struct kvm_vcpu *vcpu;
+ int i;
+
+ *val = 0;
+ raw_spin_lock(&kvm_lock);
+ list_for_each_entry(kvm, &vm_list, vm_list)
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ *val += *(u32 *)((void *)vcpu + offset);
+
+ raw_spin_unlock(&kvm_lock);
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n");
+
+static const struct file_operations *stat_fops[] = {
+ [KVM_STAT_VCPU] = &vcpu_stat_fops,
+ [KVM_STAT_VM] = &vm_stat_fops,
+};
+
+static int kvm_init_debug(void)
+{
+ int r = -EFAULT;
+ struct kvm_stats_debugfs_item *p;
+
+ kvm_debugfs_dir = debugfs_create_dir("kvm", NULL);
+ if (kvm_debugfs_dir == NULL)
+ goto out;
+
+ for (p = debugfs_entries; p->name; ++p) {
+ p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir,
+ (void *)(long)p->offset,
+ stat_fops[p->kind]);
+ if (p->dentry == NULL)
+ goto out_dir;
+ }
+
+ return 0;
+
+out_dir:
+ debugfs_remove_recursive(kvm_debugfs_dir);
+out:
+ return r;
+}
+
+static void kvm_exit_debug(void)
+{
+ struct kvm_stats_debugfs_item *p;
+
+ for (p = debugfs_entries; p->name; ++p)
+ debugfs_remove(p->dentry);
+ debugfs_remove(kvm_debugfs_dir);
+}
+
+static int kvm_suspend(void)
+{
+ if (kvm_usage_count)
+ hardware_disable_nolock(NULL);
+ return 0;
+}
+
+static void kvm_resume(void)
+{
+ if (kvm_usage_count) {
+ WARN_ON(raw_spin_is_locked(&kvm_lock));
+ hardware_enable_nolock(NULL);
+ }
+}
+
+static struct syscore_ops kvm_syscore_ops = {
+ .suspend = kvm_suspend,
+ .resume = kvm_resume,
+};
+
+struct page *bad_page;
+pfn_t bad_pfn;
+
+static inline
+struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
+{
+ return container_of(pn, struct kvm_vcpu, preempt_notifier);
+}
+
+static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
+{
+ struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
+
+ kvm_arch_vcpu_load(vcpu, cpu);
+}
+
+static void kvm_sched_out(struct preempt_notifier *pn,
+ struct task_struct *next)
+{
+ struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
+
+ kvm_arch_vcpu_put(vcpu);
+}
+
+int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
+ struct module *module)
+{
+ int r;
+ int cpu;
+
+ r = kvm_arch_init(opaque);
+ if (r)
+ goto out_fail;
+
+ bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+
+ if (bad_page == NULL) {
+ r = -ENOMEM;
+ goto out;
+ }
+
+ bad_pfn = page_to_pfn(bad_page);
+
+ hwpoison_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+
+ if (hwpoison_page == NULL) {
+ r = -ENOMEM;
+ goto out_free_0;
+ }
+
+ hwpoison_pfn = page_to_pfn(hwpoison_page);
+
+ fault_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+
+ if (fault_page == NULL) {
+ r = -ENOMEM;
+ goto out_free_0;
+ }
+
+ fault_pfn = page_to_pfn(fault_page);
+
+ if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) {
+ r = -ENOMEM;
+ goto out_free_0;
+ }
+
+ r = kvm_arch_hardware_setup();
+ if (r < 0)
+ goto out_free_0a;
+
+ for_each_online_cpu(cpu) {
+ smp_call_function_single(cpu,
+ kvm_arch_check_processor_compat,
+ &r, 1);
+ if (r < 0)
+ goto out_free_1;
+ }
+
+ r = register_cpu_notifier(&kvm_cpu_notifier);
+ if (r)
+ goto out_free_2;
+ register_reboot_notifier(&kvm_reboot_notifier);
+
+ /* A kmem cache lets us meet the alignment requirements of fx_save. */
+ if (!vcpu_align)
+ vcpu_align = __alignof__(struct kvm_vcpu);
+ kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align,
+ 0, NULL);
+ if (!kvm_vcpu_cache) {
+ r = -ENOMEM;
+ goto out_free_3;
+ }
+
+ r = kvm_async_pf_init();
+ if (r)
+ goto out_free;
+
+ kvm_chardev_ops.owner = module;
+ kvm_vm_fops.owner = module;
+ kvm_vcpu_fops.owner = module;
+
+ r = misc_register(&kvm_dev);
+ if (r) {
+ printk(KERN_ERR "kvm: misc device register failed\n");
+ goto out_unreg;
+ }
+
+ register_syscore_ops(&kvm_syscore_ops);
+
+ kvm_preempt_ops.sched_in = kvm_sched_in;
+ kvm_preempt_ops.sched_out = kvm_sched_out;
+
+ r = kvm_init_debug();
+ if (r) {
+ printk(KERN_ERR "kvm: create debugfs files failed\n");
+ goto out_undebugfs;
+ }
+
+ return 0;
+
+out_undebugfs:
+ unregister_syscore_ops(&kvm_syscore_ops);
+out_unreg:
+ kvm_async_pf_deinit();
+out_free:
+ kmem_cache_destroy(kvm_vcpu_cache);
+out_free_3:
+ unregister_reboot_notifier(&kvm_reboot_notifier);
+ unregister_cpu_notifier(&kvm_cpu_notifier);
+out_free_2:
+out_free_1:
+ kvm_arch_hardware_unsetup();
+out_free_0a:
+ free_cpumask_var(cpus_hardware_enabled);
+out_free_0:
+ if (fault_page)
+ __free_page(fault_page);
+ if (hwpoison_page)
+ __free_page(hwpoison_page);
+ __free_page(bad_page);
+out:
+ kvm_arch_exit();
+out_fail:
+ return r;
+}
+EXPORT_SYMBOL_GPL(kvm_init);
+
+void kvm_exit(void)
+{
+ kvm_exit_debug();
+ misc_deregister(&kvm_dev);
+ kmem_cache_destroy(kvm_vcpu_cache);
+ kvm_async_pf_deinit();
+ unregister_syscore_ops(&kvm_syscore_ops);
+ unregister_reboot_notifier(&kvm_reboot_notifier);
+ unregister_cpu_notifier(&kvm_cpu_notifier);
+ on_each_cpu(hardware_disable_nolock, NULL, 1);
+ kvm_arch_hardware_unsetup();
+ kvm_arch_exit();
+ free_cpumask_var(cpus_hardware_enabled);
+ __free_page(hwpoison_page);
+ __free_page(bad_page);
+}
+EXPORT_SYMBOL_GPL(kvm_exit);