root / hw / virtio-pci.c @ 1de7afc9
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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/pci.h" |
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#include "qemu/error-report.h" |
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#include "pci/msi.h" |
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#include "pci/msix.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 "qemu/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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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_unuse_all_vectors(&proxy->pci_dev); |
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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, bool set_handler) |
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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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virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
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memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
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true, n, 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, notifier);
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virtio_queue_set_host_notifier_fd_handler(vq, false, false); |
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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_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, true); |
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if (r < 0) { |
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goto assign_error;
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} |
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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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r = virtio_pci_set_host_notifier_internal(proxy, n, false, 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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r = virtio_pci_set_host_notifier_internal(proxy, n, false, 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_unuse_all_vectors(&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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hwaddr 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 = (hwaddr)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); |
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} |
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virtio_set_status(vdev, val & 0xFF);
|
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|
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if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
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virtio_pci_start_ioeventfd(proxy); |
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} |
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|
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if (vdev->status == 0) { |
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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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|
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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; |
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} |
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break;
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case VIRTIO_MSI_CONFIG_VECTOR:
|
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msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); |
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/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0) |
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val = VIRTIO_NO_VECTOR; |
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vdev->config_vector = val; |
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break;
|
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case VIRTIO_MSI_QUEUE_VECTOR:
|
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msix_vector_unuse(&proxy->pci_dev, |
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virtio_queue_vector(vdev, vdev->queue_sel)); |
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/* Make it possible for guest to discover an error took place. */
|
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if (msix_vector_use(&proxy->pci_dev, val) < 0) |
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val = VIRTIO_NO_VECTOR; |
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virtio_queue_set_vector(vdev, vdev->queue_sel, val); |
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break;
|
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default:
|
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error_report("%s: unexpected address 0x%x value 0x%x",
|
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__func__, addr, val); |
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break;
|
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} |
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} |
| 331 |
|
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static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
|
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{
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VirtIODevice *vdev = proxy->vdev; |
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uint32_t ret = 0xFFFFFFFF;
|
| 336 |
|
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switch (addr) {
|
| 338 |
case VIRTIO_PCI_HOST_FEATURES:
|
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ret = proxy->host_features; |
| 340 |
break;
|
| 341 |
case VIRTIO_PCI_GUEST_FEATURES:
|
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ret = vdev->guest_features; |
| 343 |
break;
|
| 344 |
case VIRTIO_PCI_QUEUE_PFN:
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ret = virtio_queue_get_addr(vdev, vdev->queue_sel) |
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>> VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
| 347 |
break;
|
| 348 |
case VIRTIO_PCI_QUEUE_NUM:
|
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ret = virtio_queue_get_num(vdev, vdev->queue_sel); |
| 350 |
break;
|
| 351 |
case VIRTIO_PCI_QUEUE_SEL:
|
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ret = vdev->queue_sel; |
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break;
|
| 354 |
case VIRTIO_PCI_STATUS:
|
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ret = vdev->status; |
| 356 |
break;
|
| 357 |
case VIRTIO_PCI_ISR:
|
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/* reading from the ISR also clears it. */
|
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ret = vdev->isr; |
| 360 |
vdev->isr = 0;
|
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qemu_set_irq(proxy->pci_dev.irq[0], 0); |
| 362 |
break;
|
| 363 |
case VIRTIO_MSI_CONFIG_VECTOR:
|
| 364 |
ret = vdev->config_vector; |
| 365 |
break;
|
| 366 |
case VIRTIO_MSI_QUEUE_VECTOR:
|
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ret = virtio_queue_vector(vdev, vdev->queue_sel); |
| 368 |
break;
|
| 369 |
default:
|
| 370 |
break;
|
| 371 |
} |
| 372 |
|
| 373 |
return ret;
|
| 374 |
} |
| 375 |
|
| 376 |
static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, |
| 377 |
unsigned size)
|
| 378 |
{
|
| 379 |
VirtIOPCIProxy *proxy = opaque; |
| 380 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
| 381 |
uint64_t val = 0;
|
| 382 |
if (addr < config) {
|
| 383 |
return virtio_ioport_read(proxy, addr);
|
| 384 |
} |
| 385 |
addr -= config; |
| 386 |
|
| 387 |
switch (size) {
|
| 388 |
case 1: |
| 389 |
val = virtio_config_readb(proxy->vdev, addr); |
| 390 |
break;
|
| 391 |
case 2: |
| 392 |
val = virtio_config_readw(proxy->vdev, addr); |
| 393 |
if (virtio_is_big_endian()) {
|
| 394 |
val = bswap16(val); |
| 395 |
} |
| 396 |
break;
|
| 397 |
case 4: |
| 398 |
val = virtio_config_readl(proxy->vdev, addr); |
| 399 |
if (virtio_is_big_endian()) {
|
| 400 |
val = bswap32(val); |
| 401 |
} |
| 402 |
break;
|
| 403 |
} |
| 404 |
return val;
|
| 405 |
} |
| 406 |
|
| 407 |
static void virtio_pci_config_write(void *opaque, hwaddr addr, |
| 408 |
uint64_t val, unsigned size)
|
| 409 |
{
|
| 410 |
VirtIOPCIProxy *proxy = opaque; |
| 411 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
| 412 |
if (addr < config) {
|
| 413 |
virtio_ioport_write(proxy, addr, val); |
| 414 |
return;
|
| 415 |
} |
| 416 |
addr -= config; |
| 417 |
/*
|
| 418 |
* Virtio-PCI is odd. Ioports are LE but config space is target native
|
| 419 |
* endian.
|
| 420 |
*/
|
| 421 |
switch (size) {
|
| 422 |
case 1: |
| 423 |
virtio_config_writeb(proxy->vdev, addr, val); |
| 424 |
break;
|
| 425 |
case 2: |
| 426 |
if (virtio_is_big_endian()) {
|
| 427 |
val = bswap16(val); |
| 428 |
} |
| 429 |
virtio_config_writew(proxy->vdev, addr, val); |
| 430 |
break;
|
| 431 |
case 4: |
| 432 |
if (virtio_is_big_endian()) {
|
| 433 |
val = bswap32(val); |
| 434 |
} |
| 435 |
virtio_config_writel(proxy->vdev, addr, val); |
| 436 |
break;
|
| 437 |
} |
| 438 |
} |
| 439 |
|
| 440 |
static const MemoryRegionOps virtio_pci_config_ops = { |
| 441 |
.read = virtio_pci_config_read, |
| 442 |
.write = virtio_pci_config_write, |
| 443 |
.impl = {
|
| 444 |
.min_access_size = 1,
|
| 445 |
.max_access_size = 4,
|
| 446 |
}, |
| 447 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 448 |
}; |
| 449 |
|
| 450 |
static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, |
| 451 |
uint32_t val, int len)
|
| 452 |
{
|
| 453 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 454 |
|
| 455 |
pci_default_write_config(pci_dev, address, val, len); |
| 456 |
|
| 457 |
if (range_covers_byte(address, len, PCI_COMMAND) &&
|
| 458 |
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && |
| 459 |
!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
|
| 460 |
virtio_pci_stop_ioeventfd(proxy); |
| 461 |
virtio_set_status(proxy->vdev, |
| 462 |
proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); |
| 463 |
} |
| 464 |
} |
| 465 |
|
| 466 |
static unsigned virtio_pci_get_features(void *opaque) |
| 467 |
{
|
| 468 |
VirtIOPCIProxy *proxy = opaque; |
| 469 |
return proxy->host_features;
|
| 470 |
} |
| 471 |
|
| 472 |
static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, |
| 473 |
unsigned int queue_no, |
| 474 |
unsigned int vector, |
| 475 |
MSIMessage msg) |
| 476 |
{
|
| 477 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
| 478 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
| 479 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
| 480 |
int ret;
|
| 481 |
|
| 482 |
if (irqfd->users == 0) { |
| 483 |
ret = kvm_irqchip_add_msi_route(kvm_state, msg); |
| 484 |
if (ret < 0) { |
| 485 |
return ret;
|
| 486 |
} |
| 487 |
irqfd->virq = ret; |
| 488 |
} |
| 489 |
irqfd->users++; |
| 490 |
|
| 491 |
ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq); |
| 492 |
if (ret < 0) { |
| 493 |
if (--irqfd->users == 0) { |
| 494 |
kvm_irqchip_release_virq(kvm_state, irqfd->virq); |
| 495 |
} |
| 496 |
return ret;
|
| 497 |
} |
| 498 |
|
| 499 |
virtio_queue_set_guest_notifier_fd_handler(vq, true, true); |
| 500 |
return 0; |
| 501 |
} |
| 502 |
|
| 503 |
static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, |
| 504 |
unsigned int queue_no, |
| 505 |
unsigned int vector) |
| 506 |
{
|
| 507 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
| 508 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
| 509 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
| 510 |
int ret;
|
| 511 |
|
| 512 |
ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); |
| 513 |
assert(ret == 0);
|
| 514 |
|
| 515 |
if (--irqfd->users == 0) { |
| 516 |
kvm_irqchip_release_virq(kvm_state, irqfd->virq); |
| 517 |
} |
| 518 |
|
| 519 |
virtio_queue_set_guest_notifier_fd_handler(vq, true, false); |
| 520 |
} |
| 521 |
|
| 522 |
static int kvm_virtio_pci_vector_use(PCIDevice *dev, unsigned vector, |
| 523 |
MSIMessage msg) |
| 524 |
{
|
| 525 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
| 526 |
VirtIODevice *vdev = proxy->vdev; |
| 527 |
int ret, queue_no;
|
| 528 |
|
| 529 |
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { |
| 530 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
| 531 |
break;
|
| 532 |
} |
| 533 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
| 534 |
continue;
|
| 535 |
} |
| 536 |
ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); |
| 537 |
if (ret < 0) { |
| 538 |
goto undo;
|
| 539 |
} |
| 540 |
} |
| 541 |
return 0; |
| 542 |
|
| 543 |
undo:
|
| 544 |
while (--queue_no >= 0) { |
| 545 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
| 546 |
continue;
|
| 547 |
} |
| 548 |
kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector); |
| 549 |
} |
| 550 |
return ret;
|
| 551 |
} |
| 552 |
|
| 553 |
static void kvm_virtio_pci_vector_release(PCIDevice *dev, unsigned vector) |
| 554 |
{
|
| 555 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
| 556 |
VirtIODevice *vdev = proxy->vdev; |
| 557 |
int queue_no;
|
| 558 |
|
| 559 |
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { |
| 560 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
| 561 |
break;
|
| 562 |
} |
| 563 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
| 564 |
continue;
|
| 565 |
} |
| 566 |
kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector); |
| 567 |
} |
| 568 |
} |
| 569 |
|
| 570 |
static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign) |
| 571 |
{
|
| 572 |
VirtIOPCIProxy *proxy = opaque; |
| 573 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
| 574 |
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); |
| 575 |
|
| 576 |
if (assign) {
|
| 577 |
int r = event_notifier_init(notifier, 0); |
| 578 |
if (r < 0) { |
| 579 |
return r;
|
| 580 |
} |
| 581 |
virtio_queue_set_guest_notifier_fd_handler(vq, true, false); |
| 582 |
} else {
|
| 583 |
virtio_queue_set_guest_notifier_fd_handler(vq, false, false); |
| 584 |
event_notifier_cleanup(notifier); |
| 585 |
} |
| 586 |
|
| 587 |
return 0; |
| 588 |
} |
| 589 |
|
| 590 |
static bool virtio_pci_query_guest_notifiers(void *opaque) |
| 591 |
{
|
| 592 |
VirtIOPCIProxy *proxy = opaque; |
| 593 |
return msix_enabled(&proxy->pci_dev);
|
| 594 |
} |
| 595 |
|
| 596 |
static int virtio_pci_set_guest_notifiers(void *opaque, bool assign) |
| 597 |
{
|
| 598 |
VirtIOPCIProxy *proxy = opaque; |
| 599 |
VirtIODevice *vdev = proxy->vdev; |
| 600 |
int r, n;
|
| 601 |
|
| 602 |
/* Must unset vector notifier while guest notifier is still assigned */
|
| 603 |
if (kvm_msi_via_irqfd_enabled() && !assign) {
|
| 604 |
msix_unset_vector_notifiers(&proxy->pci_dev); |
| 605 |
g_free(proxy->vector_irqfd); |
| 606 |
proxy->vector_irqfd = NULL;
|
| 607 |
} |
| 608 |
|
| 609 |
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
| 610 |
if (!virtio_queue_get_num(vdev, n)) {
|
| 611 |
break;
|
| 612 |
} |
| 613 |
|
| 614 |
r = virtio_pci_set_guest_notifier(opaque, n, assign); |
| 615 |
if (r < 0) { |
| 616 |
goto assign_error;
|
| 617 |
} |
| 618 |
} |
| 619 |
|
| 620 |
/* Must set vector notifier after guest notifier has been assigned */
|
| 621 |
if (kvm_msi_via_irqfd_enabled() && assign) {
|
| 622 |
proxy->vector_irqfd = |
| 623 |
g_malloc0(sizeof(*proxy->vector_irqfd) *
|
| 624 |
msix_nr_vectors_allocated(&proxy->pci_dev)); |
| 625 |
r = msix_set_vector_notifiers(&proxy->pci_dev, |
| 626 |
kvm_virtio_pci_vector_use, |
| 627 |
kvm_virtio_pci_vector_release); |
| 628 |
if (r < 0) { |
| 629 |
goto assign_error;
|
| 630 |
} |
| 631 |
} |
| 632 |
|
| 633 |
return 0; |
| 634 |
|
| 635 |
assign_error:
|
| 636 |
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
|
| 637 |
assert(assign); |
| 638 |
while (--n >= 0) { |
| 639 |
virtio_pci_set_guest_notifier(opaque, n, !assign); |
| 640 |
} |
| 641 |
return r;
|
| 642 |
} |
| 643 |
|
| 644 |
static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign) |
| 645 |
{
|
| 646 |
VirtIOPCIProxy *proxy = opaque; |
| 647 |
|
| 648 |
/* Stop using ioeventfd for virtqueue kick if the device starts using host
|
| 649 |
* notifiers. This makes it easy to avoid stepping on each others' toes.
|
| 650 |
*/
|
| 651 |
proxy->ioeventfd_disabled = assign; |
| 652 |
if (assign) {
|
| 653 |
virtio_pci_stop_ioeventfd(proxy); |
| 654 |
} |
| 655 |
/* We don't need to start here: it's not needed because backend
|
| 656 |
* currently only stops on status change away from ok,
|
| 657 |
* reset, vmstop and such. If we do add code to start here,
|
| 658 |
* need to check vmstate, device state etc. */
|
| 659 |
return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); |
| 660 |
} |
| 661 |
|
| 662 |
static void virtio_pci_vmstate_change(void *opaque, bool running) |
| 663 |
{
|
| 664 |
VirtIOPCIProxy *proxy = opaque; |
| 665 |
|
| 666 |
if (running) {
|
| 667 |
/* Try to find out if the guest has bus master disabled, but is
|
| 668 |
in ready state. Then we have a buggy guest OS. */
|
| 669 |
if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
| 670 |
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
|
| 671 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
| 672 |
} |
| 673 |
virtio_pci_start_ioeventfd(proxy); |
| 674 |
} else {
|
| 675 |
virtio_pci_stop_ioeventfd(proxy); |
| 676 |
} |
| 677 |
} |
| 678 |
|
| 679 |
static const VirtIOBindings virtio_pci_bindings = { |
| 680 |
.notify = virtio_pci_notify, |
| 681 |
.save_config = virtio_pci_save_config, |
| 682 |
.load_config = virtio_pci_load_config, |
| 683 |
.save_queue = virtio_pci_save_queue, |
| 684 |
.load_queue = virtio_pci_load_queue, |
| 685 |
.get_features = virtio_pci_get_features, |
| 686 |
.query_guest_notifiers = virtio_pci_query_guest_notifiers, |
| 687 |
.set_host_notifier = virtio_pci_set_host_notifier, |
| 688 |
.set_guest_notifiers = virtio_pci_set_guest_notifiers, |
| 689 |
.vmstate_change = virtio_pci_vmstate_change, |
| 690 |
}; |
| 691 |
|
| 692 |
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
|
| 693 |
{
|
| 694 |
uint8_t *config; |
| 695 |
uint32_t size; |
| 696 |
|
| 697 |
proxy->vdev = vdev; |
| 698 |
|
| 699 |
config = proxy->pci_dev.config; |
| 700 |
|
| 701 |
if (proxy->class_code) {
|
| 702 |
pci_config_set_class(config, proxy->class_code); |
| 703 |
} |
| 704 |
pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, |
| 705 |
pci_get_word(config + PCI_VENDOR_ID)); |
| 706 |
pci_set_word(config + PCI_SUBSYSTEM_ID, vdev->device_id); |
| 707 |
config[PCI_INTERRUPT_PIN] = 1;
|
| 708 |
|
| 709 |
if (vdev->nvectors &&
|
| 710 |
msix_init_exclusive_bar(&proxy->pci_dev, vdev->nvectors, 1)) {
|
| 711 |
vdev->nvectors = 0;
|
| 712 |
} |
| 713 |
|
| 714 |
proxy->pci_dev.config_write = virtio_write_config; |
| 715 |
|
| 716 |
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len; |
| 717 |
if (size & (size-1)) |
| 718 |
size = 1 << qemu_fls(size);
|
| 719 |
|
| 720 |
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, |
| 721 |
"virtio-pci", size);
|
| 722 |
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
|
| 723 |
&proxy->bar); |
| 724 |
|
| 725 |
if (!kvm_has_many_ioeventfds()) {
|
| 726 |
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; |
| 727 |
} |
| 728 |
|
| 729 |
virtio_bind_device(vdev, &virtio_pci_bindings, proxy); |
| 730 |
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
|
| 731 |
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
|
| 732 |
proxy->host_features = vdev->get_features(vdev, proxy->host_features); |
| 733 |
} |
| 734 |
|
| 735 |
static int virtio_blk_init_pci(PCIDevice *pci_dev) |
| 736 |
{
|
| 737 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 738 |
VirtIODevice *vdev; |
| 739 |
|
| 740 |
if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
|
| 741 |
proxy->class_code != PCI_CLASS_STORAGE_OTHER) |
| 742 |
proxy->class_code = PCI_CLASS_STORAGE_SCSI; |
| 743 |
|
| 744 |
vdev = virtio_blk_init(&pci_dev->qdev, &proxy->blk); |
| 745 |
if (!vdev) {
|
| 746 |
return -1; |
| 747 |
} |
| 748 |
vdev->nvectors = proxy->nvectors; |
| 749 |
virtio_init_pci(proxy, vdev); |
| 750 |
/* make the actual value visible */
|
| 751 |
proxy->nvectors = vdev->nvectors; |
| 752 |
return 0; |
| 753 |
} |
| 754 |
|
| 755 |
static void virtio_exit_pci(PCIDevice *pci_dev) |
| 756 |
{
|
| 757 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 758 |
|
| 759 |
memory_region_destroy(&proxy->bar); |
| 760 |
msix_uninit_exclusive_bar(pci_dev); |
| 761 |
} |
| 762 |
|
| 763 |
static void virtio_blk_exit_pci(PCIDevice *pci_dev) |
| 764 |
{
|
| 765 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 766 |
|
| 767 |
virtio_pci_stop_ioeventfd(proxy); |
| 768 |
virtio_blk_exit(proxy->vdev); |
| 769 |
virtio_exit_pci(pci_dev); |
| 770 |
} |
| 771 |
|
| 772 |
static int virtio_serial_init_pci(PCIDevice *pci_dev) |
| 773 |
{
|
| 774 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 775 |
VirtIODevice *vdev; |
| 776 |
|
| 777 |
if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
|
| 778 |
proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
|
| 779 |
proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
|
| 780 |
proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER; |
| 781 |
|
| 782 |
vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial); |
| 783 |
if (!vdev) {
|
| 784 |
return -1; |
| 785 |
} |
| 786 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
| 787 |
? proxy->serial.max_virtserial_ports + 1
|
| 788 |
: proxy->nvectors; |
| 789 |
virtio_init_pci(proxy, vdev); |
| 790 |
proxy->nvectors = vdev->nvectors; |
| 791 |
return 0; |
| 792 |
} |
| 793 |
|
| 794 |
static void virtio_serial_exit_pci(PCIDevice *pci_dev) |
| 795 |
{
|
| 796 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 797 |
|
| 798 |
virtio_pci_stop_ioeventfd(proxy); |
| 799 |
virtio_serial_exit(proxy->vdev); |
| 800 |
virtio_exit_pci(pci_dev); |
| 801 |
} |
| 802 |
|
| 803 |
static int virtio_net_init_pci(PCIDevice *pci_dev) |
| 804 |
{
|
| 805 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 806 |
VirtIODevice *vdev; |
| 807 |
|
| 808 |
vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net); |
| 809 |
|
| 810 |
vdev->nvectors = proxy->nvectors; |
| 811 |
virtio_init_pci(proxy, vdev); |
| 812 |
|
| 813 |
/* make the actual value visible */
|
| 814 |
proxy->nvectors = vdev->nvectors; |
| 815 |
return 0; |
| 816 |
} |
| 817 |
|
| 818 |
static void virtio_net_exit_pci(PCIDevice *pci_dev) |
| 819 |
{
|
| 820 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 821 |
|
| 822 |
virtio_pci_stop_ioeventfd(proxy); |
| 823 |
virtio_net_exit(proxy->vdev); |
| 824 |
virtio_exit_pci(pci_dev); |
| 825 |
} |
| 826 |
|
| 827 |
static int virtio_balloon_init_pci(PCIDevice *pci_dev) |
| 828 |
{
|
| 829 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 830 |
VirtIODevice *vdev; |
| 831 |
|
| 832 |
if (proxy->class_code != PCI_CLASS_OTHERS &&
|
| 833 |
proxy->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
|
| 834 |
proxy->class_code = PCI_CLASS_OTHERS; |
| 835 |
} |
| 836 |
|
| 837 |
vdev = virtio_balloon_init(&pci_dev->qdev); |
| 838 |
if (!vdev) {
|
| 839 |
return -1; |
| 840 |
} |
| 841 |
virtio_init_pci(proxy, vdev); |
| 842 |
return 0; |
| 843 |
} |
| 844 |
|
| 845 |
static void virtio_balloon_exit_pci(PCIDevice *pci_dev) |
| 846 |
{
|
| 847 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 848 |
|
| 849 |
virtio_pci_stop_ioeventfd(proxy); |
| 850 |
virtio_balloon_exit(proxy->vdev); |
| 851 |
virtio_exit_pci(pci_dev); |
| 852 |
} |
| 853 |
|
| 854 |
static int virtio_rng_init_pci(PCIDevice *pci_dev) |
| 855 |
{
|
| 856 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 857 |
VirtIODevice *vdev; |
| 858 |
|
| 859 |
if (proxy->rng.rng == NULL) { |
| 860 |
proxy->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM)); |
| 861 |
|
| 862 |
object_property_add_child(OBJECT(pci_dev), |
| 863 |
"default-backend",
|
| 864 |
OBJECT(proxy->rng.default_backend), |
| 865 |
NULL);
|
| 866 |
|
| 867 |
object_property_set_link(OBJECT(pci_dev), |
| 868 |
OBJECT(proxy->rng.default_backend), |
| 869 |
"rng", NULL); |
| 870 |
} |
| 871 |
|
| 872 |
vdev = virtio_rng_init(&pci_dev->qdev, &proxy->rng); |
| 873 |
if (!vdev) {
|
| 874 |
return -1; |
| 875 |
} |
| 876 |
virtio_init_pci(proxy, vdev); |
| 877 |
return 0; |
| 878 |
} |
| 879 |
|
| 880 |
static void virtio_rng_exit_pci(PCIDevice *pci_dev) |
| 881 |
{
|
| 882 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 883 |
|
| 884 |
virtio_pci_stop_ioeventfd(proxy); |
| 885 |
virtio_rng_exit(proxy->vdev); |
| 886 |
virtio_exit_pci(pci_dev); |
| 887 |
} |
| 888 |
|
| 889 |
static Property virtio_blk_properties[] = {
|
| 890 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
| 891 |
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, blk.conf), |
| 892 |
DEFINE_BLOCK_CHS_PROPERTIES(VirtIOPCIProxy, blk.conf), |
| 893 |
DEFINE_PROP_STRING("serial", VirtIOPCIProxy, blk.serial),
|
| 894 |
#ifdef __linux__
|
| 895 |
DEFINE_PROP_BIT("scsi", VirtIOPCIProxy, blk.scsi, 0, true), |
| 896 |
#endif
|
| 897 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
| 898 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
| 899 |
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), |
| 900 |
DEFINE_PROP_END_OF_LIST(), |
| 901 |
}; |
| 902 |
|
| 903 |
static void virtio_blk_class_init(ObjectClass *klass, void *data) |
| 904 |
{
|
| 905 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 906 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| 907 |
|
| 908 |
k->init = virtio_blk_init_pci; |
| 909 |
k->exit = virtio_blk_exit_pci; |
| 910 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| 911 |
k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; |
| 912 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
| 913 |
k->class_id = PCI_CLASS_STORAGE_SCSI; |
| 914 |
dc->reset = virtio_pci_reset; |
| 915 |
dc->props = virtio_blk_properties; |
| 916 |
} |
| 917 |
|
| 918 |
static TypeInfo virtio_blk_info = {
|
| 919 |
.name = "virtio-blk-pci",
|
| 920 |
.parent = TYPE_PCI_DEVICE, |
| 921 |
.instance_size = sizeof(VirtIOPCIProxy),
|
| 922 |
.class_init = virtio_blk_class_init, |
| 923 |
}; |
| 924 |
|
| 925 |
static Property virtio_net_properties[] = {
|
| 926 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), |
| 927 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), |
| 928 |
DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), |
| 929 |
DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic), |
| 930 |
DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy, net.txtimer, TX_TIMER_INTERVAL),
|
| 931 |
DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy, net.txburst, TX_BURST),
|
| 932 |
DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
|
| 933 |
DEFINE_PROP_END_OF_LIST(), |
| 934 |
}; |
| 935 |
|
| 936 |
static void virtio_net_class_init(ObjectClass *klass, void *data) |
| 937 |
{
|
| 938 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 939 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| 940 |
|
| 941 |
k->init = virtio_net_init_pci; |
| 942 |
k->exit = virtio_net_exit_pci; |
| 943 |
k->romfile = "pxe-virtio.rom";
|
| 944 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| 945 |
k->device_id = PCI_DEVICE_ID_VIRTIO_NET; |
| 946 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
| 947 |
k->class_id = PCI_CLASS_NETWORK_ETHERNET; |
| 948 |
dc->reset = virtio_pci_reset; |
| 949 |
dc->props = virtio_net_properties; |
| 950 |
} |
| 951 |
|
| 952 |
static TypeInfo virtio_net_info = {
|
| 953 |
.name = "virtio-net-pci",
|
| 954 |
.parent = TYPE_PCI_DEVICE, |
| 955 |
.instance_size = sizeof(VirtIOPCIProxy),
|
| 956 |
.class_init = virtio_net_class_init, |
| 957 |
}; |
| 958 |
|
| 959 |
static Property virtio_serial_properties[] = {
|
| 960 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
| 961 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
| 962 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
| 963 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
| 964 |
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31), |
| 965 |
DEFINE_PROP_END_OF_LIST(), |
| 966 |
}; |
| 967 |
|
| 968 |
static void virtio_serial_class_init(ObjectClass *klass, void *data) |
| 969 |
{
|
| 970 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 971 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| 972 |
|
| 973 |
k->init = virtio_serial_init_pci; |
| 974 |
k->exit = virtio_serial_exit_pci; |
| 975 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| 976 |
k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; |
| 977 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
| 978 |
k->class_id = PCI_CLASS_COMMUNICATION_OTHER; |
| 979 |
dc->reset = virtio_pci_reset; |
| 980 |
dc->props = virtio_serial_properties; |
| 981 |
} |
| 982 |
|
| 983 |
static TypeInfo virtio_serial_info = {
|
| 984 |
.name = "virtio-serial-pci",
|
| 985 |
.parent = TYPE_PCI_DEVICE, |
| 986 |
.instance_size = sizeof(VirtIOPCIProxy),
|
| 987 |
.class_init = virtio_serial_class_init, |
| 988 |
}; |
| 989 |
|
| 990 |
static Property virtio_balloon_properties[] = {
|
| 991 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
| 992 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
| 993 |
DEFINE_PROP_END_OF_LIST(), |
| 994 |
}; |
| 995 |
|
| 996 |
static void virtio_balloon_class_init(ObjectClass *klass, void *data) |
| 997 |
{
|
| 998 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 999 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| 1000 |
|
| 1001 |
k->init = virtio_balloon_init_pci; |
| 1002 |
k->exit = virtio_balloon_exit_pci; |
| 1003 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| 1004 |
k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; |
| 1005 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
| 1006 |
k->class_id = PCI_CLASS_OTHERS; |
| 1007 |
dc->reset = virtio_pci_reset; |
| 1008 |
dc->props = virtio_balloon_properties; |
| 1009 |
} |
| 1010 |
|
| 1011 |
static TypeInfo virtio_balloon_info = {
|
| 1012 |
.name = "virtio-balloon-pci",
|
| 1013 |
.parent = TYPE_PCI_DEVICE, |
| 1014 |
.instance_size = sizeof(VirtIOPCIProxy),
|
| 1015 |
.class_init = virtio_balloon_class_init, |
| 1016 |
}; |
| 1017 |
|
| 1018 |
static void virtio_rng_initfn(Object *obj) |
| 1019 |
{
|
| 1020 |
PCIDevice *pci_dev = PCI_DEVICE(obj); |
| 1021 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 1022 |
|
| 1023 |
object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
|
| 1024 |
(Object **)&proxy->rng.rng, NULL);
|
| 1025 |
} |
| 1026 |
|
| 1027 |
static Property virtio_rng_properties[] = {
|
| 1028 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
| 1029 |
/* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If
|
| 1030 |
you have an entropy source capable of generating more entropy than this
|
| 1031 |
and you can pass it through via virtio-rng, then hats off to you. Until
|
| 1032 |
then, this is unlimited for all practical purposes.
|
| 1033 |
*/
|
| 1034 |
DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy, rng.max_bytes, INT64_MAX),
|
| 1035 |
DEFINE_PROP_UINT32("period", VirtIOPCIProxy, rng.period_ms, 1 << 16), |
| 1036 |
DEFINE_PROP_END_OF_LIST(), |
| 1037 |
}; |
| 1038 |
|
| 1039 |
static void virtio_rng_class_init(ObjectClass *klass, void *data) |
| 1040 |
{
|
| 1041 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 1042 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| 1043 |
|
| 1044 |
k->init = virtio_rng_init_pci; |
| 1045 |
k->exit = virtio_rng_exit_pci; |
| 1046 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| 1047 |
k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; |
| 1048 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
| 1049 |
k->class_id = PCI_CLASS_OTHERS; |
| 1050 |
dc->reset = virtio_pci_reset; |
| 1051 |
dc->props = virtio_rng_properties; |
| 1052 |
} |
| 1053 |
|
| 1054 |
static TypeInfo virtio_rng_info = {
|
| 1055 |
.name = "virtio-rng-pci",
|
| 1056 |
.parent = TYPE_PCI_DEVICE, |
| 1057 |
.instance_size = sizeof(VirtIOPCIProxy),
|
| 1058 |
.instance_init = virtio_rng_initfn, |
| 1059 |
.class_init = virtio_rng_class_init, |
| 1060 |
}; |
| 1061 |
|
| 1062 |
static int virtio_scsi_init_pci(PCIDevice *pci_dev) |
| 1063 |
{
|
| 1064 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 1065 |
VirtIODevice *vdev; |
| 1066 |
|
| 1067 |
vdev = virtio_scsi_init(&pci_dev->qdev, &proxy->scsi); |
| 1068 |
if (!vdev) {
|
| 1069 |
return -EINVAL;
|
| 1070 |
} |
| 1071 |
|
| 1072 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
| 1073 |
? proxy->scsi.num_queues + 3
|
| 1074 |
: proxy->nvectors; |
| 1075 |
virtio_init_pci(proxy, vdev); |
| 1076 |
|
| 1077 |
/* make the actual value visible */
|
| 1078 |
proxy->nvectors = vdev->nvectors; |
| 1079 |
return 0; |
| 1080 |
} |
| 1081 |
|
| 1082 |
static void virtio_scsi_exit_pci(PCIDevice *pci_dev) |
| 1083 |
{
|
| 1084 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
| 1085 |
|
| 1086 |
virtio_scsi_exit(proxy->vdev); |
| 1087 |
virtio_exit_pci(pci_dev); |
| 1088 |
} |
| 1089 |
|
| 1090 |
static Property virtio_scsi_properties[] = {
|
| 1091 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
| 1092 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
| 1093 |
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOPCIProxy, host_features, scsi), |
| 1094 |
DEFINE_PROP_END_OF_LIST(), |
| 1095 |
}; |
| 1096 |
|
| 1097 |
static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
| 1098 |
{
|
| 1099 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 1100 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| 1101 |
|
| 1102 |
k->init = virtio_scsi_init_pci; |
| 1103 |
k->exit = virtio_scsi_exit_pci; |
| 1104 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
| 1105 |
k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; |
| 1106 |
k->revision = 0x00;
|
| 1107 |
k->class_id = PCI_CLASS_STORAGE_SCSI; |
| 1108 |
dc->reset = virtio_pci_reset; |
| 1109 |
dc->props = virtio_scsi_properties; |
| 1110 |
} |
| 1111 |
|
| 1112 |
static TypeInfo virtio_scsi_info = {
|
| 1113 |
.name = "virtio-scsi-pci",
|
| 1114 |
.parent = TYPE_PCI_DEVICE, |
| 1115 |
.instance_size = sizeof(VirtIOPCIProxy),
|
| 1116 |
.class_init = virtio_scsi_class_init, |
| 1117 |
}; |
| 1118 |
|
| 1119 |
static void virtio_pci_register_types(void) |
| 1120 |
{
|
| 1121 |
type_register_static(&virtio_blk_info); |
| 1122 |
type_register_static(&virtio_net_info); |
| 1123 |
type_register_static(&virtio_serial_info); |
| 1124 |
type_register_static(&virtio_balloon_info); |
| 1125 |
type_register_static(&virtio_scsi_info); |
| 1126 |
type_register_static(&virtio_rng_info); |
| 1127 |
} |
| 1128 |
|
| 1129 |
type_init(virtio_pci_register_types) |