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/*
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* Virtio PCI Bindings
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*
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* Copyright IBM, Corp. 2007
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* Copyright (c) 2009 CodeSourcery
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Paul Brook <paul@codesourcery.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include <inttypes.h> |
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#include "virtio.h" |
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#include "virtio-blk.h" |
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#include "virtio-net.h" |
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#include "virtio-serial.h" |
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#include "virtio-scsi.h" |
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#include "pci.h" |
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#include "qemu-error.h" |
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#include "msix.h" |
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#include "net.h" |
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#include "loader.h" |
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#include "kvm.h" |
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#include "blockdev.h" |
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#include "virtio-pci.h" |
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#include "range.h" |
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/* from Linux's linux/virtio_pci.h */
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/* A 32-bit r/o bitmask of the features supported by the host */
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#define VIRTIO_PCI_HOST_FEATURES 0 |
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/* A 32-bit r/w bitmask of features activated by the guest */
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#define VIRTIO_PCI_GUEST_FEATURES 4 |
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/* A 32-bit r/w PFN for the currently selected queue */
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#define VIRTIO_PCI_QUEUE_PFN 8 |
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/* A 16-bit r/o queue size for the currently selected queue */
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#define VIRTIO_PCI_QUEUE_NUM 12 |
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/* A 16-bit r/w queue selector */
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#define VIRTIO_PCI_QUEUE_SEL 14 |
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/* A 16-bit r/w queue notifier */
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#define VIRTIO_PCI_QUEUE_NOTIFY 16 |
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/* An 8-bit device status register. */
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#define VIRTIO_PCI_STATUS 18 |
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/* An 8-bit r/o interrupt status register. Reading the value will return the
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* current contents of the ISR and will also clear it. This is effectively
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* a read-and-acknowledge. */
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#define VIRTIO_PCI_ISR 19 |
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/* MSI-X registers: only enabled if MSI-X is enabled. */
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/* A 16-bit vector for configuration changes. */
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#define VIRTIO_MSI_CONFIG_VECTOR 20 |
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/* A 16-bit vector for selected queue notifications. */
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#define VIRTIO_MSI_QUEUE_VECTOR 22 |
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/* Config space size */
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#define VIRTIO_PCI_CONFIG_NOMSI 20 |
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#define VIRTIO_PCI_CONFIG_MSI 24 |
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#define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \
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VIRTIO_PCI_CONFIG_MSI : \ |
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VIRTIO_PCI_CONFIG_NOMSI) |
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/* The remaining space is defined by each driver as the per-driver
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* configuration space */
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#define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \
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VIRTIO_PCI_CONFIG_MSI : \ |
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VIRTIO_PCI_CONFIG_NOMSI) |
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/* How many bits to shift physical queue address written to QUEUE_PFN.
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* 12 is historical, and due to x86 page size. */
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#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 |
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/* Flags track per-device state like workarounds for quirks in older guests. */
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#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0) |
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/* QEMU doesn't strictly need write barriers since everything runs in
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* lock-step. We'll leave the calls to wmb() in though to make it obvious for
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* KVM or if kqemu gets SMP support.
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*/
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#define wmb() do { } while (0) |
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/* HACK for virtio to determine if it's running a big endian guest */
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bool virtio_is_big_endian(void); |
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/* virtio device */
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static void virtio_pci_notify(void *opaque, uint16_t vector) |
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{ |
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VirtIOPCIProxy *proxy = opaque; |
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if (msix_enabled(&proxy->pci_dev))
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msix_notify(&proxy->pci_dev, vector); |
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else
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qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1); |
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} |
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static void virtio_pci_save_config(void * opaque, QEMUFile *f) |
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{ |
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VirtIOPCIProxy *proxy = opaque; |
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pci_device_save(&proxy->pci_dev, f); |
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msix_save(&proxy->pci_dev, f); |
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if (msix_present(&proxy->pci_dev))
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qemu_put_be16(f, proxy->vdev->config_vector); |
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} |
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static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f) |
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{ |
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VirtIOPCIProxy *proxy = opaque; |
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if (msix_present(&proxy->pci_dev))
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qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n)); |
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} |
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static int virtio_pci_load_config(void * opaque, QEMUFile *f) |
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{ |
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VirtIOPCIProxy *proxy = opaque; |
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int ret;
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ret = pci_device_load(&proxy->pci_dev, f); |
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if (ret) {
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return ret;
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} |
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msix_load(&proxy->pci_dev, f); |
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if (msix_present(&proxy->pci_dev)) {
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qemu_get_be16s(f, &proxy->vdev->config_vector); |
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} else {
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proxy->vdev->config_vector = VIRTIO_NO_VECTOR; |
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} |
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if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
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return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
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} |
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return 0; |
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} |
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static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f) |
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{ |
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VirtIOPCIProxy *proxy = opaque; |
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uint16_t vector; |
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if (msix_present(&proxy->pci_dev)) {
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qemu_get_be16s(f, &vector); |
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} else {
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vector = VIRTIO_NO_VECTOR; |
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} |
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virtio_queue_set_vector(proxy->vdev, n, vector); |
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if (vector != VIRTIO_NO_VECTOR) {
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return msix_vector_use(&proxy->pci_dev, vector);
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} |
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return 0; |
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} |
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static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy, |
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int n, bool assign) |
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{ |
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VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
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EventNotifier *notifier = virtio_queue_get_host_notifier(vq); |
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int r = 0; |
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if (assign) {
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r = event_notifier_init(notifier, 1);
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if (r < 0) { |
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error_report("%s: unable to init event notifier: %d",
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__func__, r); |
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return r;
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} |
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memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
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true, n, event_notifier_get_fd(notifier));
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} else {
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memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
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true, n, event_notifier_get_fd(notifier));
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/* Handle the race condition where the guest kicked and we deassigned
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* before we got around to handling the kick.
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*/
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if (event_notifier_test_and_clear(notifier)) {
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virtio_queue_notify_vq(vq); |
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} |
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event_notifier_cleanup(notifier); |
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} |
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return r;
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} |
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static void virtio_pci_host_notifier_read(void *opaque) |
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{ |
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VirtQueue *vq = opaque; |
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EventNotifier *n = virtio_queue_get_host_notifier(vq); |
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if (event_notifier_test_and_clear(n)) {
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virtio_queue_notify_vq(vq); |
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} |
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} |
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static void virtio_pci_set_host_notifier_fd_handler(VirtIOPCIProxy *proxy, |
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int n, bool assign) |
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{ |
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VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
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EventNotifier *notifier = virtio_queue_get_host_notifier(vq); |
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if (assign) {
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qemu_set_fd_handler(event_notifier_get_fd(notifier), |
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virtio_pci_host_notifier_read, NULL, vq);
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} else {
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qemu_set_fd_handler(event_notifier_get_fd(notifier), |
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NULL, NULL, NULL); |
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} |
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} |
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static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy) |
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{ |
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int n, r;
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if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
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proxy->ioeventfd_disabled || |
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proxy->ioeventfd_started) { |
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return;
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} |
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for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
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if (!virtio_queue_get_num(proxy->vdev, n)) {
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continue;
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} |
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r = virtio_pci_set_host_notifier_internal(proxy, n, true);
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if (r < 0) { |
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goto assign_error;
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} |
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virtio_pci_set_host_notifier_fd_handler(proxy, n, true);
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} |
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proxy->ioeventfd_started = true;
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return;
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assign_error:
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while (--n >= 0) { |
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if (!virtio_queue_get_num(proxy->vdev, n)) {
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continue;
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} |
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virtio_pci_set_host_notifier_fd_handler(proxy, n, false);
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r = virtio_pci_set_host_notifier_internal(proxy, n, false);
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assert(r >= 0);
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} |
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proxy->ioeventfd_started = false;
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error_report("%s: failed. Fallback to a userspace (slower).", __func__);
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} |
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static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy) |
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{ |
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int r;
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int n;
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if (!proxy->ioeventfd_started) {
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return;
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} |
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for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
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if (!virtio_queue_get_num(proxy->vdev, n)) {
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continue;
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} |
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virtio_pci_set_host_notifier_fd_handler(proxy, n, false);
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r = virtio_pci_set_host_notifier_internal(proxy, n, false);
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assert(r >= 0);
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} |
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proxy->ioeventfd_started = false;
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} |
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void virtio_pci_reset(DeviceState *d)
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{ |
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VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev); |
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virtio_pci_stop_ioeventfd(proxy); |
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virtio_reset(proxy->vdev); |
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msix_reset(&proxy->pci_dev); |
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proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
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} |
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static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
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{ |
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VirtIOPCIProxy *proxy = opaque; |
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VirtIODevice *vdev = proxy->vdev; |
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target_phys_addr_t pa; |
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switch (addr) {
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case VIRTIO_PCI_GUEST_FEATURES:
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/* Guest does not negotiate properly? We have to assume nothing. */
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if (val & (1 << VIRTIO_F_BAD_FEATURE)) { |
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val = vdev->bad_features ? vdev->bad_features(vdev) : 0;
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} |
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virtio_set_features(vdev, val); |
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break;
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case VIRTIO_PCI_QUEUE_PFN:
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pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
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if (pa == 0) { |
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virtio_pci_stop_ioeventfd(proxy); |
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virtio_reset(proxy->vdev); |
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msix_unuse_all_vectors(&proxy->pci_dev); |
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} |
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else
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virtio_queue_set_addr(vdev, vdev->queue_sel, pa); |
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break;
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case VIRTIO_PCI_QUEUE_SEL:
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if (val < VIRTIO_PCI_QUEUE_MAX)
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vdev->queue_sel = val; |
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break;
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case VIRTIO_PCI_QUEUE_NOTIFY:
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if (val < VIRTIO_PCI_QUEUE_MAX) {
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virtio_queue_notify(vdev, val); |
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} |
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break;
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case VIRTIO_PCI_STATUS:
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if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
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virtio_pci_stop_ioeventfd(proxy); |
320 |
} |
321 |
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virtio_set_status(vdev, val & 0xFF);
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if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
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virtio_pci_start_ioeventfd(proxy); |
326 |
} |
327 |
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328 |
if (vdev->status == 0) { |
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virtio_reset(proxy->vdev); |
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msix_unuse_all_vectors(&proxy->pci_dev); |
331 |
} |
332 |
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/* Linux before 2.6.34 sets the device as OK without enabling
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the PCI device bus master bit. In this case we need to disable
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some safety checks. */
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if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
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!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
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proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
339 |
} |
340 |
break;
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case VIRTIO_MSI_CONFIG_VECTOR:
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msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); |
343 |
/* Make it possible for guest to discover an error took place. */
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344 |
if (msix_vector_use(&proxy->pci_dev, val) < 0) |
345 |
val = VIRTIO_NO_VECTOR; |
346 |
vdev->config_vector = val; |
347 |
break;
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case VIRTIO_MSI_QUEUE_VECTOR:
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msix_vector_unuse(&proxy->pci_dev, |
350 |
virtio_queue_vector(vdev, vdev->queue_sel)); |
351 |
/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0) |
353 |
val = VIRTIO_NO_VECTOR; |
354 |
virtio_queue_set_vector(vdev, vdev->queue_sel, val); |
355 |
break;
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356 |
default:
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357 |
error_report("%s: unexpected address 0x%x value 0x%x",
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__func__, addr, val); |
359 |
break;
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360 |
} |
361 |
} |
362 |
|
363 |
static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
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364 |
{ |
365 |
VirtIODevice *vdev = proxy->vdev; |
366 |
uint32_t ret = 0xFFFFFFFF;
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367 |
|
368 |
switch (addr) {
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369 |
case VIRTIO_PCI_HOST_FEATURES:
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370 |
ret = proxy->host_features; |
371 |
break;
|
372 |
case VIRTIO_PCI_GUEST_FEATURES:
|
373 |
ret = vdev->guest_features; |
374 |
break;
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375 |
case VIRTIO_PCI_QUEUE_PFN:
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376 |
ret = virtio_queue_get_addr(vdev, vdev->queue_sel) |
377 |
>> VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
378 |
break;
|
379 |
case VIRTIO_PCI_QUEUE_NUM:
|
380 |
ret = virtio_queue_get_num(vdev, vdev->queue_sel); |
381 |
break;
|
382 |
case VIRTIO_PCI_QUEUE_SEL:
|
383 |
ret = vdev->queue_sel; |
384 |
break;
|
385 |
case VIRTIO_PCI_STATUS:
|
386 |
ret = vdev->status; |
387 |
break;
|
388 |
case VIRTIO_PCI_ISR:
|
389 |
/* reading from the ISR also clears it. */
|
390 |
ret = vdev->isr; |
391 |
vdev->isr = 0;
|
392 |
qemu_set_irq(proxy->pci_dev.irq[0], 0); |
393 |
break;
|
394 |
case VIRTIO_MSI_CONFIG_VECTOR:
|
395 |
ret = vdev->config_vector; |
396 |
break;
|
397 |
case VIRTIO_MSI_QUEUE_VECTOR:
|
398 |
ret = virtio_queue_vector(vdev, vdev->queue_sel); |
399 |
break;
|
400 |
default:
|
401 |
break;
|
402 |
} |
403 |
|
404 |
return ret;
|
405 |
} |
406 |
|
407 |
static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr) |
408 |
{ |
409 |
VirtIOPCIProxy *proxy = opaque; |
410 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
411 |
if (addr < config)
|
412 |
return virtio_ioport_read(proxy, addr);
|
413 |
addr -= config; |
414 |
return virtio_config_readb(proxy->vdev, addr);
|
415 |
} |
416 |
|
417 |
static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr) |
418 |
{ |
419 |
VirtIOPCIProxy *proxy = opaque; |
420 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
421 |
uint16_t val; |
422 |
if (addr < config)
|
423 |
return virtio_ioport_read(proxy, addr);
|
424 |
addr -= config; |
425 |
val = virtio_config_readw(proxy->vdev, addr); |
426 |
if (virtio_is_big_endian()) {
|
427 |
/*
|
428 |
* virtio is odd, ioports are LE but config space is target native
|
429 |
* endian. However, in qemu, all PIO is LE, so we need to re-swap
|
430 |
* on BE targets
|
431 |
*/
|
432 |
val = bswap16(val); |
433 |
} |
434 |
return val;
|
435 |
} |
436 |
|
437 |
static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr) |
438 |
{ |
439 |
VirtIOPCIProxy *proxy = opaque; |
440 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
441 |
uint32_t val; |
442 |
if (addr < config)
|
443 |
return virtio_ioport_read(proxy, addr);
|
444 |
addr -= config; |
445 |
val = virtio_config_readl(proxy->vdev, addr); |
446 |
if (virtio_is_big_endian()) {
|
447 |
val = bswap32(val); |
448 |
} |
449 |
return val;
|
450 |
} |
451 |
|
452 |
static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val) |
453 |
{ |
454 |
VirtIOPCIProxy *proxy = opaque; |
455 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
456 |
if (addr < config) {
|
457 |
virtio_ioport_write(proxy, addr, val); |
458 |
return;
|
459 |
} |
460 |
addr -= config; |
461 |
virtio_config_writeb(proxy->vdev, addr, val); |
462 |
} |
463 |
|
464 |
static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val) |
465 |
{ |
466 |
VirtIOPCIProxy *proxy = opaque; |
467 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
468 |
if (addr < config) {
|
469 |
virtio_ioport_write(proxy, addr, val); |
470 |
return;
|
471 |
} |
472 |
addr -= config; |
473 |
if (virtio_is_big_endian()) {
|
474 |
val = bswap16(val); |
475 |
} |
476 |
virtio_config_writew(proxy->vdev, addr, val); |
477 |
} |
478 |
|
479 |
static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val) |
480 |
{ |
481 |
VirtIOPCIProxy *proxy = opaque; |
482 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
483 |
if (addr < config) {
|
484 |
virtio_ioport_write(proxy, addr, val); |
485 |
return;
|
486 |
} |
487 |
addr -= config; |
488 |
if (virtio_is_big_endian()) {
|
489 |
val = bswap32(val); |
490 |
} |
491 |
virtio_config_writel(proxy->vdev, addr, val); |
492 |
} |
493 |
|
494 |
const MemoryRegionPortio virtio_portio[] = {
|
495 |
{ 0, 0x10000, 1, .write = virtio_pci_config_writeb, }, |
496 |
{ 0, 0x10000, 2, .write = virtio_pci_config_writew, }, |
497 |
{ 0, 0x10000, 4, .write = virtio_pci_config_writel, }, |
498 |
{ 0, 0x10000, 1, .read = virtio_pci_config_readb, }, |
499 |
{ 0, 0x10000, 2, .read = virtio_pci_config_readw, }, |
500 |
{ 0, 0x10000, 4, .read = virtio_pci_config_readl, }, |
501 |
PORTIO_END_OF_LIST() |
502 |
}; |
503 |
|
504 |
static const MemoryRegionOps virtio_pci_config_ops = { |
505 |
.old_portio = virtio_portio, |
506 |
.endianness = DEVICE_LITTLE_ENDIAN, |
507 |
}; |
508 |
|
509 |
static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, |
510 |
uint32_t val, int len)
|
511 |
{ |
512 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
513 |
|
514 |
pci_default_write_config(pci_dev, address, val, len); |
515 |
|
516 |
if (range_covers_byte(address, len, PCI_COMMAND) &&
|
517 |
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && |
518 |
!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { |
519 |
virtio_pci_stop_ioeventfd(proxy); |
520 |
virtio_set_status(proxy->vdev, |
521 |
proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); |
522 |
} |
523 |
|
524 |
msix_write_config(pci_dev, address, val, len); |
525 |
} |
526 |
|
527 |
static unsigned virtio_pci_get_features(void *opaque) |
528 |
{ |
529 |
VirtIOPCIProxy *proxy = opaque; |
530 |
return proxy->host_features;
|
531 |
} |
532 |
|
533 |
static void virtio_pci_guest_notifier_read(void *opaque) |
534 |
{ |
535 |
VirtQueue *vq = opaque; |
536 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
537 |
if (event_notifier_test_and_clear(n)) {
|
538 |
virtio_irq(vq); |
539 |
} |
540 |
} |
541 |
|
542 |
static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign) |
543 |
{ |
544 |
VirtIOPCIProxy *proxy = opaque; |
545 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
546 |
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); |
547 |
|
548 |
if (assign) {
|
549 |
int r = event_notifier_init(notifier, 0); |
550 |
if (r < 0) { |
551 |
return r;
|
552 |
} |
553 |
qemu_set_fd_handler(event_notifier_get_fd(notifier), |
554 |
virtio_pci_guest_notifier_read, NULL, vq);
|
555 |
} else {
|
556 |
qemu_set_fd_handler(event_notifier_get_fd(notifier), |
557 |
NULL, NULL, NULL); |
558 |
event_notifier_cleanup(notifier); |
559 |
} |
560 |
|
561 |
return 0; |
562 |
} |
563 |
|
564 |
static bool virtio_pci_query_guest_notifiers(void *opaque) |
565 |
{ |
566 |
VirtIOPCIProxy *proxy = opaque; |
567 |
return msix_enabled(&proxy->pci_dev);
|
568 |
} |
569 |
|
570 |
static int virtio_pci_set_guest_notifiers(void *opaque, bool assign) |
571 |
{ |
572 |
VirtIOPCIProxy *proxy = opaque; |
573 |
VirtIODevice *vdev = proxy->vdev; |
574 |
int r, n;
|
575 |
|
576 |
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
577 |
if (!virtio_queue_get_num(vdev, n)) {
|
578 |
break;
|
579 |
} |
580 |
|
581 |
r = virtio_pci_set_guest_notifier(opaque, n, assign); |
582 |
if (r < 0) { |
583 |
goto assign_error;
|
584 |
} |
585 |
} |
586 |
|
587 |
return 0; |
588 |
|
589 |
assign_error:
|
590 |
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
|
591 |
while (--n >= 0) { |
592 |
virtio_pci_set_guest_notifier(opaque, n, !assign); |
593 |
} |
594 |
return r;
|
595 |
} |
596 |
|
597 |
static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign) |
598 |
{ |
599 |
VirtIOPCIProxy *proxy = opaque; |
600 |
|
601 |
/* Stop using ioeventfd for virtqueue kick if the device starts using host
|
602 |
* notifiers. This makes it easy to avoid stepping on each others' toes.
|
603 |
*/
|
604 |
proxy->ioeventfd_disabled = assign; |
605 |
if (assign) {
|
606 |
virtio_pci_stop_ioeventfd(proxy); |
607 |
} |
608 |
/* We don't need to start here: it's not needed because backend
|
609 |
* currently only stops on status change away from ok,
|
610 |
* reset, vmstop and such. If we do add code to start here,
|
611 |
* need to check vmstate, device state etc. */
|
612 |
return virtio_pci_set_host_notifier_internal(proxy, n, assign);
|
613 |
} |
614 |
|
615 |
static void virtio_pci_vmstate_change(void *opaque, bool running) |
616 |
{ |
617 |
VirtIOPCIProxy *proxy = opaque; |
618 |
|
619 |
if (running) {
|
620 |
/* Try to find out if the guest has bus master disabled, but is
|
621 |
in ready state. Then we have a buggy guest OS. */
|
622 |
if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
623 |
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
624 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
625 |
} |
626 |
virtio_pci_start_ioeventfd(proxy); |
627 |
} else {
|
628 |
virtio_pci_stop_ioeventfd(proxy); |
629 |
} |
630 |
} |
631 |
|
632 |
static const VirtIOBindings virtio_pci_bindings = { |
633 |
.notify = virtio_pci_notify, |
634 |
.save_config = virtio_pci_save_config, |
635 |
.load_config = virtio_pci_load_config, |
636 |
.save_queue = virtio_pci_save_queue, |
637 |
.load_queue = virtio_pci_load_queue, |
638 |
.get_features = virtio_pci_get_features, |
639 |
.query_guest_notifiers = virtio_pci_query_guest_notifiers, |
640 |
.set_host_notifier = virtio_pci_set_host_notifier, |
641 |
.set_guest_notifiers = virtio_pci_set_guest_notifiers, |
642 |
.vmstate_change = virtio_pci_vmstate_change, |
643 |
}; |
644 |
|
645 |
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
|
646 |
{ |
647 |
uint8_t *config; |
648 |
uint32_t size; |
649 |
|
650 |
proxy->vdev = vdev; |
651 |
|
652 |
config = proxy->pci_dev.config; |
653 |
|
654 |
if (proxy->class_code) {
|
655 |
pci_config_set_class(config, proxy->class_code); |
656 |
} |
657 |
pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, |
658 |
pci_get_word(config + PCI_VENDOR_ID)); |
659 |
pci_set_word(config + PCI_SUBSYSTEM_ID, vdev->device_id); |
660 |
config[PCI_INTERRUPT_PIN] = 1;
|
661 |
|
662 |
memory_region_init(&proxy->msix_bar, "virtio-msix", 4096); |
663 |
if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors,
|
664 |
&proxy->msix_bar, 1, 0)) { |
665 |
pci_register_bar(&proxy->pci_dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY,
|
666 |
&proxy->msix_bar); |
667 |
} else
|
668 |
vdev->nvectors = 0;
|
669 |
|
670 |
proxy->pci_dev.config_write = virtio_write_config; |
671 |
|
672 |
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len; |
673 |
if (size & (size-1)) |
674 |
size = 1 << qemu_fls(size);
|
675 |
|
676 |
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, |
677 |
"virtio-pci", size);
|
678 |
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
|
679 |
&proxy->bar); |
680 |
|
681 |
if (!kvm_has_many_ioeventfds()) {
|
682 |
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; |
683 |
} |
684 |
|
685 |
virtio_bind_device(vdev, &virtio_pci_bindings, proxy); |
686 |
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
|
687 |
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
|
688 |
proxy->host_features = vdev->get_features(vdev, proxy->host_features); |
689 |
} |
690 |
|
691 |
static int virtio_blk_init_pci(PCIDevice *pci_dev) |
692 |
{ |
693 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
694 |
VirtIODevice *vdev; |
695 |
|
696 |
if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
|
697 |
proxy->class_code != PCI_CLASS_STORAGE_OTHER) |
698 |
proxy->class_code = PCI_CLASS_STORAGE_SCSI; |
699 |
|
700 |
vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block, |
701 |
&proxy->block_serial); |
702 |
if (!vdev) {
|
703 |
return -1; |
704 |
} |
705 |
vdev->nvectors = proxy->nvectors; |
706 |
virtio_init_pci(proxy, vdev); |
707 |
/* make the actual value visible */
|
708 |
proxy->nvectors = vdev->nvectors; |
709 |
return 0; |
710 |
} |
711 |
|
712 |
static int virtio_exit_pci(PCIDevice *pci_dev) |
713 |
{ |
714 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
715 |
int r;
|
716 |
|
717 |
memory_region_destroy(&proxy->bar); |
718 |
r = msix_uninit(pci_dev, &proxy->msix_bar); |
719 |
memory_region_destroy(&proxy->msix_bar); |
720 |
return r;
|
721 |
} |
722 |
|
723 |
static int virtio_blk_exit_pci(PCIDevice *pci_dev) |
724 |
{ |
725 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
726 |
|
727 |
virtio_pci_stop_ioeventfd(proxy); |
728 |
virtio_blk_exit(proxy->vdev); |
729 |
blockdev_mark_auto_del(proxy->block.bs); |
730 |
return virtio_exit_pci(pci_dev);
|
731 |
} |
732 |
|
733 |
static int virtio_serial_init_pci(PCIDevice *pci_dev) |
734 |
{ |
735 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
736 |
VirtIODevice *vdev; |
737 |
|
738 |
if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
|
739 |
proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
|
740 |
proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
|
741 |
proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER; |
742 |
|
743 |
vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial); |
744 |
if (!vdev) {
|
745 |
return -1; |
746 |
} |
747 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
748 |
? proxy->serial.max_virtserial_ports + 1
|
749 |
: proxy->nvectors; |
750 |
virtio_init_pci(proxy, vdev); |
751 |
proxy->nvectors = vdev->nvectors; |
752 |
return 0; |
753 |
} |
754 |
|
755 |
static int virtio_serial_exit_pci(PCIDevice *pci_dev) |
756 |
{ |
757 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
758 |
|
759 |
virtio_pci_stop_ioeventfd(proxy); |
760 |
virtio_serial_exit(proxy->vdev); |
761 |
return virtio_exit_pci(pci_dev);
|
762 |
} |
763 |
|
764 |
static int virtio_net_init_pci(PCIDevice *pci_dev) |
765 |
{ |
766 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
767 |
VirtIODevice *vdev; |
768 |
|
769 |
vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net); |
770 |
|
771 |
vdev->nvectors = proxy->nvectors; |
772 |
virtio_init_pci(proxy, vdev); |
773 |
|
774 |
/* make the actual value visible */
|
775 |
proxy->nvectors = vdev->nvectors; |
776 |
return 0; |
777 |
} |
778 |
|
779 |
static int virtio_net_exit_pci(PCIDevice *pci_dev) |
780 |
{ |
781 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
782 |
|
783 |
virtio_pci_stop_ioeventfd(proxy); |
784 |
virtio_net_exit(proxy->vdev); |
785 |
return virtio_exit_pci(pci_dev);
|
786 |
} |
787 |
|
788 |
static int virtio_balloon_init_pci(PCIDevice *pci_dev) |
789 |
{ |
790 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
791 |
VirtIODevice *vdev; |
792 |
|
793 |
vdev = virtio_balloon_init(&pci_dev->qdev); |
794 |
if (!vdev) {
|
795 |
return -1; |
796 |
} |
797 |
virtio_init_pci(proxy, vdev); |
798 |
return 0; |
799 |
} |
800 |
|
801 |
static int virtio_balloon_exit_pci(PCIDevice *pci_dev) |
802 |
{ |
803 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
804 |
|
805 |
virtio_pci_stop_ioeventfd(proxy); |
806 |
virtio_balloon_exit(proxy->vdev); |
807 |
return virtio_exit_pci(pci_dev);
|
808 |
} |
809 |
|
810 |
static Property virtio_blk_properties[] = {
|
811 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
812 |
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block), |
813 |
DEFINE_PROP_STRING("serial", VirtIOPCIProxy, block_serial),
|
814 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
815 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
816 |
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), |
817 |
DEFINE_PROP_END_OF_LIST(), |
818 |
}; |
819 |
|
820 |
static void virtio_blk_class_init(ObjectClass *klass, void *data) |
821 |
{ |
822 |
DeviceClass *dc = DEVICE_CLASS(klass); |
823 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
824 |
|
825 |
k->init = virtio_blk_init_pci; |
826 |
k->exit = virtio_blk_exit_pci; |
827 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
828 |
k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; |
829 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
830 |
k->class_id = PCI_CLASS_STORAGE_SCSI; |
831 |
dc->reset = virtio_pci_reset; |
832 |
dc->props = virtio_blk_properties; |
833 |
} |
834 |
|
835 |
static TypeInfo virtio_blk_info = {
|
836 |
.name = "virtio-blk-pci",
|
837 |
.parent = TYPE_PCI_DEVICE, |
838 |
.instance_size = sizeof(VirtIOPCIProxy),
|
839 |
.class_init = virtio_blk_class_init, |
840 |
}; |
841 |
|
842 |
static Property virtio_net_properties[] = {
|
843 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), |
844 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), |
845 |
DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), |
846 |
DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic), |
847 |
DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy, net.txtimer, TX_TIMER_INTERVAL),
|
848 |
DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy, net.txburst, TX_BURST),
|
849 |
DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
|
850 |
DEFINE_PROP_END_OF_LIST(), |
851 |
}; |
852 |
|
853 |
static void virtio_net_class_init(ObjectClass *klass, void *data) |
854 |
{ |
855 |
DeviceClass *dc = DEVICE_CLASS(klass); |
856 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
857 |
|
858 |
k->init = virtio_net_init_pci; |
859 |
k->exit = virtio_net_exit_pci; |
860 |
k->romfile = "pxe-virtio.rom";
|
861 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
862 |
k->device_id = PCI_DEVICE_ID_VIRTIO_NET; |
863 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
864 |
k->class_id = PCI_CLASS_NETWORK_ETHERNET; |
865 |
dc->reset = virtio_pci_reset; |
866 |
dc->props = virtio_net_properties; |
867 |
} |
868 |
|
869 |
static TypeInfo virtio_net_info = {
|
870 |
.name = "virtio-net-pci",
|
871 |
.parent = TYPE_PCI_DEVICE, |
872 |
.instance_size = sizeof(VirtIOPCIProxy),
|
873 |
.class_init = virtio_net_class_init, |
874 |
}; |
875 |
|
876 |
static Property virtio_serial_properties[] = {
|
877 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
878 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
879 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
880 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
881 |
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31), |
882 |
DEFINE_PROP_END_OF_LIST(), |
883 |
}; |
884 |
|
885 |
static void virtio_serial_class_init(ObjectClass *klass, void *data) |
886 |
{ |
887 |
DeviceClass *dc = DEVICE_CLASS(klass); |
888 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
889 |
|
890 |
k->init = virtio_serial_init_pci; |
891 |
k->exit = virtio_serial_exit_pci; |
892 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
893 |
k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; |
894 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
895 |
k->class_id = PCI_CLASS_COMMUNICATION_OTHER; |
896 |
dc->reset = virtio_pci_reset; |
897 |
dc->props = virtio_serial_properties; |
898 |
} |
899 |
|
900 |
static TypeInfo virtio_serial_info = {
|
901 |
.name = "virtio-serial-pci",
|
902 |
.parent = TYPE_PCI_DEVICE, |
903 |
.instance_size = sizeof(VirtIOPCIProxy),
|
904 |
.class_init = virtio_serial_class_init, |
905 |
}; |
906 |
|
907 |
static Property virtio_balloon_properties[] = {
|
908 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
909 |
DEFINE_PROP_END_OF_LIST(), |
910 |
}; |
911 |
|
912 |
static void virtio_balloon_class_init(ObjectClass *klass, void *data) |
913 |
{ |
914 |
DeviceClass *dc = DEVICE_CLASS(klass); |
915 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
916 |
|
917 |
k->init = virtio_balloon_init_pci; |
918 |
k->exit = virtio_balloon_exit_pci; |
919 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
920 |
k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; |
921 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
922 |
k->class_id = PCI_CLASS_MEMORY_RAM; |
923 |
dc->reset = virtio_pci_reset; |
924 |
dc->props = virtio_balloon_properties; |
925 |
} |
926 |
|
927 |
static TypeInfo virtio_balloon_info = {
|
928 |
.name = "virtio-balloon-pci",
|
929 |
.parent = TYPE_PCI_DEVICE, |
930 |
.instance_size = sizeof(VirtIOPCIProxy),
|
931 |
.class_init = virtio_balloon_class_init, |
932 |
}; |
933 |
|
934 |
static int virtio_scsi_init_pci(PCIDevice *pci_dev) |
935 |
{ |
936 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
937 |
VirtIODevice *vdev; |
938 |
|
939 |
vdev = virtio_scsi_init(&pci_dev->qdev, &proxy->scsi); |
940 |
if (!vdev) {
|
941 |
return -EINVAL;
|
942 |
} |
943 |
|
944 |
vdev->nvectors = proxy->nvectors; |
945 |
virtio_init_pci(proxy, vdev); |
946 |
|
947 |
/* make the actual value visible */
|
948 |
proxy->nvectors = vdev->nvectors; |
949 |
return 0; |
950 |
} |
951 |
|
952 |
static int virtio_scsi_exit_pci(PCIDevice *pci_dev) |
953 |
{ |
954 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
955 |
|
956 |
virtio_scsi_exit(proxy->vdev); |
957 |
return virtio_exit_pci(pci_dev);
|
958 |
} |
959 |
|
960 |
static Property virtio_scsi_properties[] = {
|
961 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
962 |
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOPCIProxy, host_features, scsi), |
963 |
DEFINE_PROP_END_OF_LIST(), |
964 |
}; |
965 |
|
966 |
static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
967 |
{ |
968 |
DeviceClass *dc = DEVICE_CLASS(klass); |
969 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
970 |
|
971 |
k->init = virtio_scsi_init_pci; |
972 |
k->exit = virtio_scsi_exit_pci; |
973 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
974 |
k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; |
975 |
k->revision = 0x00;
|
976 |
k->class_id = PCI_CLASS_STORAGE_SCSI; |
977 |
dc->reset = virtio_pci_reset; |
978 |
dc->props = virtio_scsi_properties; |
979 |
} |
980 |
|
981 |
static TypeInfo virtio_scsi_info = {
|
982 |
.name = "virtio-scsi-pci",
|
983 |
.parent = TYPE_PCI_DEVICE, |
984 |
.instance_size = sizeof(VirtIOPCIProxy),
|
985 |
.class_init = virtio_scsi_class_init, |
986 |
}; |
987 |
|
988 |
static void virtio_pci_register_types(void) |
989 |
{ |
990 |
type_register_static(&virtio_blk_info); |
991 |
type_register_static(&virtio_net_info); |
992 |
type_register_static(&virtio_serial_info); |
993 |
type_register_static(&virtio_balloon_info); |
994 |
type_register_static(&virtio_scsi_info); |
995 |
} |
996 |
|
997 |
type_init(virtio_pci_register_types) |