root / hw / virtio-pci.c @ c65fc1df
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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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*/
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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 "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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/* 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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static 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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if (vdev->bad_features)
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val = proxy->host_features & vdev->bad_features(vdev); |
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else
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val = 0;
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} |
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if (vdev->set_features)
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vdev->set_features(vdev, val); |
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vdev->guest_features = 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); |
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} |
320 |
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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); |
325 |
} |
326 |
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327 |
if (vdev->status == 0) { |
328 |
virtio_reset(proxy->vdev); |
329 |
msix_unuse_all_vectors(&proxy->pci_dev); |
330 |
} |
331 |
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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)) { |
337 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
338 |
} |
339 |
break;
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case VIRTIO_MSI_CONFIG_VECTOR:
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msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); |
342 |
/* Make it possible for guest to discover an error took place. */
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343 |
if (msix_vector_use(&proxy->pci_dev, val) < 0) |
344 |
val = VIRTIO_NO_VECTOR; |
345 |
vdev->config_vector = val; |
346 |
break;
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347 |
case VIRTIO_MSI_QUEUE_VECTOR:
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348 |
msix_vector_unuse(&proxy->pci_dev, |
349 |
virtio_queue_vector(vdev, vdev->queue_sel)); |
350 |
/* Make it possible for guest to discover an error took place. */
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351 |
if (msix_vector_use(&proxy->pci_dev, val) < 0) |
352 |
val = VIRTIO_NO_VECTOR; |
353 |
virtio_queue_set_vector(vdev, vdev->queue_sel, val); |
354 |
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); |
358 |
break;
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359 |
} |
360 |
} |
361 |
|
362 |
static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
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{ |
364 |
VirtIODevice *vdev = proxy->vdev; |
365 |
uint32_t ret = 0xFFFFFFFF;
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366 |
|
367 |
switch (addr) {
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368 |
case VIRTIO_PCI_HOST_FEATURES:
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369 |
ret = proxy->host_features; |
370 |
break;
|
371 |
case VIRTIO_PCI_GUEST_FEATURES:
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372 |
ret = vdev->guest_features; |
373 |
break;
|
374 |
case VIRTIO_PCI_QUEUE_PFN:
|
375 |
ret = virtio_queue_get_addr(vdev, vdev->queue_sel) |
376 |
>> VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
377 |
break;
|
378 |
case VIRTIO_PCI_QUEUE_NUM:
|
379 |
ret = virtio_queue_get_num(vdev, vdev->queue_sel); |
380 |
break;
|
381 |
case VIRTIO_PCI_QUEUE_SEL:
|
382 |
ret = vdev->queue_sel; |
383 |
break;
|
384 |
case VIRTIO_PCI_STATUS:
|
385 |
ret = vdev->status; |
386 |
break;
|
387 |
case VIRTIO_PCI_ISR:
|
388 |
/* reading from the ISR also clears it. */
|
389 |
ret = vdev->isr; |
390 |
vdev->isr = 0;
|
391 |
qemu_set_irq(proxy->pci_dev.irq[0], 0); |
392 |
break;
|
393 |
case VIRTIO_MSI_CONFIG_VECTOR:
|
394 |
ret = vdev->config_vector; |
395 |
break;
|
396 |
case VIRTIO_MSI_QUEUE_VECTOR:
|
397 |
ret = virtio_queue_vector(vdev, vdev->queue_sel); |
398 |
break;
|
399 |
default:
|
400 |
break;
|
401 |
} |
402 |
|
403 |
return ret;
|
404 |
} |
405 |
|
406 |
static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr) |
407 |
{ |
408 |
VirtIOPCIProxy *proxy = opaque; |
409 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
410 |
if (addr < config)
|
411 |
return virtio_ioport_read(proxy, addr);
|
412 |
addr -= config; |
413 |
return virtio_config_readb(proxy->vdev, addr);
|
414 |
} |
415 |
|
416 |
static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr) |
417 |
{ |
418 |
VirtIOPCIProxy *proxy = opaque; |
419 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
420 |
if (addr < config)
|
421 |
return virtio_ioport_read(proxy, addr);
|
422 |
addr -= config; |
423 |
return virtio_config_readw(proxy->vdev, addr);
|
424 |
} |
425 |
|
426 |
static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr) |
427 |
{ |
428 |
VirtIOPCIProxy *proxy = opaque; |
429 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
430 |
if (addr < config)
|
431 |
return virtio_ioport_read(proxy, addr);
|
432 |
addr -= config; |
433 |
return virtio_config_readl(proxy->vdev, addr);
|
434 |
} |
435 |
|
436 |
static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val) |
437 |
{ |
438 |
VirtIOPCIProxy *proxy = opaque; |
439 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
440 |
if (addr < config) {
|
441 |
virtio_ioport_write(proxy, addr, val); |
442 |
return;
|
443 |
} |
444 |
addr -= config; |
445 |
virtio_config_writeb(proxy->vdev, addr, val); |
446 |
} |
447 |
|
448 |
static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val) |
449 |
{ |
450 |
VirtIOPCIProxy *proxy = opaque; |
451 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
452 |
if (addr < config) {
|
453 |
virtio_ioport_write(proxy, addr, val); |
454 |
return;
|
455 |
} |
456 |
addr -= config; |
457 |
virtio_config_writew(proxy->vdev, addr, val); |
458 |
} |
459 |
|
460 |
static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val) |
461 |
{ |
462 |
VirtIOPCIProxy *proxy = opaque; |
463 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
464 |
if (addr < config) {
|
465 |
virtio_ioport_write(proxy, addr, val); |
466 |
return;
|
467 |
} |
468 |
addr -= config; |
469 |
virtio_config_writel(proxy->vdev, addr, val); |
470 |
} |
471 |
|
472 |
const MemoryRegionPortio virtio_portio[] = {
|
473 |
{ 0, 0x10000, 1, .write = virtio_pci_config_writeb, }, |
474 |
{ 0, 0x10000, 2, .write = virtio_pci_config_writew, }, |
475 |
{ 0, 0x10000, 4, .write = virtio_pci_config_writel, }, |
476 |
{ 0, 0x10000, 1, .read = virtio_pci_config_readb, }, |
477 |
{ 0, 0x10000, 2, .read = virtio_pci_config_readw, }, |
478 |
{ 0, 0x10000, 4, .read = virtio_pci_config_readl, }, |
479 |
PORTIO_END_OF_LIST() |
480 |
}; |
481 |
|
482 |
static const MemoryRegionOps virtio_pci_config_ops = { |
483 |
.old_portio = virtio_portio, |
484 |
.endianness = DEVICE_LITTLE_ENDIAN, |
485 |
}; |
486 |
|
487 |
static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, |
488 |
uint32_t val, int len)
|
489 |
{ |
490 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
491 |
|
492 |
pci_default_write_config(pci_dev, address, val, len); |
493 |
|
494 |
if (range_covers_byte(address, len, PCI_COMMAND) &&
|
495 |
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && |
496 |
!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { |
497 |
virtio_pci_stop_ioeventfd(proxy); |
498 |
virtio_set_status(proxy->vdev, |
499 |
proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); |
500 |
} |
501 |
|
502 |
msix_write_config(pci_dev, address, val, len); |
503 |
} |
504 |
|
505 |
static unsigned virtio_pci_get_features(void *opaque) |
506 |
{ |
507 |
VirtIOPCIProxy *proxy = opaque; |
508 |
return proxy->host_features;
|
509 |
} |
510 |
|
511 |
static void virtio_pci_guest_notifier_read(void *opaque) |
512 |
{ |
513 |
VirtQueue *vq = opaque; |
514 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
515 |
if (event_notifier_test_and_clear(n)) {
|
516 |
virtio_irq(vq); |
517 |
} |
518 |
} |
519 |
|
520 |
static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign) |
521 |
{ |
522 |
VirtIOPCIProxy *proxy = opaque; |
523 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
524 |
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); |
525 |
|
526 |
if (assign) {
|
527 |
int r = event_notifier_init(notifier, 0); |
528 |
if (r < 0) { |
529 |
return r;
|
530 |
} |
531 |
qemu_set_fd_handler(event_notifier_get_fd(notifier), |
532 |
virtio_pci_guest_notifier_read, NULL, vq);
|
533 |
} else {
|
534 |
qemu_set_fd_handler(event_notifier_get_fd(notifier), |
535 |
NULL, NULL, NULL); |
536 |
event_notifier_cleanup(notifier); |
537 |
} |
538 |
|
539 |
return 0; |
540 |
} |
541 |
|
542 |
static bool virtio_pci_query_guest_notifiers(void *opaque) |
543 |
{ |
544 |
VirtIOPCIProxy *proxy = opaque; |
545 |
return msix_enabled(&proxy->pci_dev);
|
546 |
} |
547 |
|
548 |
static int virtio_pci_set_guest_notifiers(void *opaque, bool assign) |
549 |
{ |
550 |
VirtIOPCIProxy *proxy = opaque; |
551 |
VirtIODevice *vdev = proxy->vdev; |
552 |
int r, n;
|
553 |
|
554 |
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
555 |
if (!virtio_queue_get_num(vdev, n)) {
|
556 |
break;
|
557 |
} |
558 |
|
559 |
r = virtio_pci_set_guest_notifier(opaque, n, assign); |
560 |
if (r < 0) { |
561 |
goto assign_error;
|
562 |
} |
563 |
} |
564 |
|
565 |
return 0; |
566 |
|
567 |
assign_error:
|
568 |
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
|
569 |
while (--n >= 0) { |
570 |
virtio_pci_set_guest_notifier(opaque, n, !assign); |
571 |
} |
572 |
return r;
|
573 |
} |
574 |
|
575 |
static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign) |
576 |
{ |
577 |
VirtIOPCIProxy *proxy = opaque; |
578 |
|
579 |
/* Stop using ioeventfd for virtqueue kick if the device starts using host
|
580 |
* notifiers. This makes it easy to avoid stepping on each others' toes.
|
581 |
*/
|
582 |
proxy->ioeventfd_disabled = assign; |
583 |
if (assign) {
|
584 |
virtio_pci_stop_ioeventfd(proxy); |
585 |
} |
586 |
/* We don't need to start here: it's not needed because backend
|
587 |
* currently only stops on status change away from ok,
|
588 |
* reset, vmstop and such. If we do add code to start here,
|
589 |
* need to check vmstate, device state etc. */
|
590 |
return virtio_pci_set_host_notifier_internal(proxy, n, assign);
|
591 |
} |
592 |
|
593 |
static void virtio_pci_vmstate_change(void *opaque, bool running) |
594 |
{ |
595 |
VirtIOPCIProxy *proxy = opaque; |
596 |
|
597 |
if (running) {
|
598 |
/* Try to find out if the guest has bus master disabled, but is
|
599 |
in ready state. Then we have a buggy guest OS. */
|
600 |
if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
601 |
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
602 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
603 |
} |
604 |
virtio_pci_start_ioeventfd(proxy); |
605 |
} else {
|
606 |
virtio_pci_stop_ioeventfd(proxy); |
607 |
} |
608 |
} |
609 |
|
610 |
static const VirtIOBindings virtio_pci_bindings = { |
611 |
.notify = virtio_pci_notify, |
612 |
.save_config = virtio_pci_save_config, |
613 |
.load_config = virtio_pci_load_config, |
614 |
.save_queue = virtio_pci_save_queue, |
615 |
.load_queue = virtio_pci_load_queue, |
616 |
.get_features = virtio_pci_get_features, |
617 |
.query_guest_notifiers = virtio_pci_query_guest_notifiers, |
618 |
.set_host_notifier = virtio_pci_set_host_notifier, |
619 |
.set_guest_notifiers = virtio_pci_set_guest_notifiers, |
620 |
.vmstate_change = virtio_pci_vmstate_change, |
621 |
}; |
622 |
|
623 |
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
|
624 |
{ |
625 |
uint8_t *config; |
626 |
uint32_t size; |
627 |
|
628 |
proxy->vdev = vdev; |
629 |
|
630 |
config = proxy->pci_dev.config; |
631 |
|
632 |
if (proxy->class_code) {
|
633 |
pci_config_set_class(config, proxy->class_code); |
634 |
} |
635 |
pci_set_word(config + 0x2c, pci_get_word(config + PCI_VENDOR_ID));
|
636 |
pci_set_word(config + 0x2e, vdev->device_id);
|
637 |
config[0x3d] = 1; |
638 |
|
639 |
memory_region_init(&proxy->msix_bar, "virtio-msix", 4096); |
640 |
if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors,
|
641 |
&proxy->msix_bar, 1, 0)) { |
642 |
pci_register_bar(&proxy->pci_dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY,
|
643 |
&proxy->msix_bar); |
644 |
} else
|
645 |
vdev->nvectors = 0;
|
646 |
|
647 |
proxy->pci_dev.config_write = virtio_write_config; |
648 |
|
649 |
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len; |
650 |
if (size & (size-1)) |
651 |
size = 1 << qemu_fls(size);
|
652 |
|
653 |
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, |
654 |
"virtio-pci", size);
|
655 |
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
|
656 |
&proxy->bar); |
657 |
|
658 |
if (!kvm_has_many_ioeventfds()) {
|
659 |
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; |
660 |
} |
661 |
|
662 |
virtio_bind_device(vdev, &virtio_pci_bindings, proxy); |
663 |
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
|
664 |
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
|
665 |
proxy->host_features = vdev->get_features(vdev, proxy->host_features); |
666 |
} |
667 |
|
668 |
static int virtio_blk_init_pci(PCIDevice *pci_dev) |
669 |
{ |
670 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
671 |
VirtIODevice *vdev; |
672 |
|
673 |
if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
|
674 |
proxy->class_code != PCI_CLASS_STORAGE_OTHER) |
675 |
proxy->class_code = PCI_CLASS_STORAGE_SCSI; |
676 |
|
677 |
vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block, |
678 |
&proxy->block_serial); |
679 |
if (!vdev) {
|
680 |
return -1; |
681 |
} |
682 |
vdev->nvectors = proxy->nvectors; |
683 |
virtio_init_pci(proxy, vdev); |
684 |
/* make the actual value visible */
|
685 |
proxy->nvectors = vdev->nvectors; |
686 |
return 0; |
687 |
} |
688 |
|
689 |
static int virtio_exit_pci(PCIDevice *pci_dev) |
690 |
{ |
691 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
692 |
int r;
|
693 |
|
694 |
memory_region_destroy(&proxy->bar); |
695 |
r = msix_uninit(pci_dev, &proxy->msix_bar); |
696 |
memory_region_destroy(&proxy->msix_bar); |
697 |
return r;
|
698 |
} |
699 |
|
700 |
static int virtio_blk_exit_pci(PCIDevice *pci_dev) |
701 |
{ |
702 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
703 |
|
704 |
virtio_pci_stop_ioeventfd(proxy); |
705 |
virtio_blk_exit(proxy->vdev); |
706 |
blockdev_mark_auto_del(proxy->block.bs); |
707 |
return virtio_exit_pci(pci_dev);
|
708 |
} |
709 |
|
710 |
static int virtio_serial_init_pci(PCIDevice *pci_dev) |
711 |
{ |
712 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
713 |
VirtIODevice *vdev; |
714 |
|
715 |
if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
|
716 |
proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
|
717 |
proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
|
718 |
proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER; |
719 |
|
720 |
vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial); |
721 |
if (!vdev) {
|
722 |
return -1; |
723 |
} |
724 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
725 |
? proxy->serial.max_virtserial_ports + 1
|
726 |
: proxy->nvectors; |
727 |
virtio_init_pci(proxy, vdev); |
728 |
proxy->nvectors = vdev->nvectors; |
729 |
return 0; |
730 |
} |
731 |
|
732 |
static int virtio_serial_exit_pci(PCIDevice *pci_dev) |
733 |
{ |
734 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
735 |
|
736 |
virtio_pci_stop_ioeventfd(proxy); |
737 |
virtio_serial_exit(proxy->vdev); |
738 |
return virtio_exit_pci(pci_dev);
|
739 |
} |
740 |
|
741 |
static int virtio_net_init_pci(PCIDevice *pci_dev) |
742 |
{ |
743 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
744 |
VirtIODevice *vdev; |
745 |
|
746 |
vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net); |
747 |
|
748 |
vdev->nvectors = proxy->nvectors; |
749 |
virtio_init_pci(proxy, vdev); |
750 |
|
751 |
/* make the actual value visible */
|
752 |
proxy->nvectors = vdev->nvectors; |
753 |
return 0; |
754 |
} |
755 |
|
756 |
static int virtio_net_exit_pci(PCIDevice *pci_dev) |
757 |
{ |
758 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
759 |
|
760 |
virtio_pci_stop_ioeventfd(proxy); |
761 |
virtio_net_exit(proxy->vdev); |
762 |
return virtio_exit_pci(pci_dev);
|
763 |
} |
764 |
|
765 |
static int virtio_balloon_init_pci(PCIDevice *pci_dev) |
766 |
{ |
767 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
768 |
VirtIODevice *vdev; |
769 |
|
770 |
vdev = virtio_balloon_init(&pci_dev->qdev); |
771 |
if (!vdev) {
|
772 |
return -1; |
773 |
} |
774 |
virtio_init_pci(proxy, vdev); |
775 |
return 0; |
776 |
} |
777 |
|
778 |
static int virtio_balloon_exit_pci(PCIDevice *pci_dev) |
779 |
{ |
780 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
781 |
|
782 |
virtio_pci_stop_ioeventfd(proxy); |
783 |
virtio_balloon_exit(proxy->vdev); |
784 |
return virtio_exit_pci(pci_dev);
|
785 |
} |
786 |
|
787 |
static PCIDeviceInfo virtio_info[] = {
|
788 |
{ |
789 |
.qdev.name = "virtio-blk-pci",
|
790 |
.qdev.alias = "virtio-blk",
|
791 |
.qdev.size = sizeof(VirtIOPCIProxy),
|
792 |
.init = virtio_blk_init_pci, |
793 |
.exit = virtio_blk_exit_pci, |
794 |
.vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET, |
795 |
.device_id = PCI_DEVICE_ID_VIRTIO_BLOCK, |
796 |
.revision = VIRTIO_PCI_ABI_VERSION, |
797 |
.class_id = PCI_CLASS_STORAGE_SCSI, |
798 |
.qdev.props = (Property[]) { |
799 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
800 |
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block), |
801 |
DEFINE_PROP_STRING("serial", VirtIOPCIProxy, block_serial),
|
802 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
|
803 |
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
|
804 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
805 |
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), |
806 |
DEFINE_PROP_END_OF_LIST(), |
807 |
}, |
808 |
.qdev.reset = virtio_pci_reset, |
809 |
},{ |
810 |
.qdev.name = "virtio-net-pci",
|
811 |
.qdev.alias = "virtio-net",
|
812 |
.qdev.size = sizeof(VirtIOPCIProxy),
|
813 |
.init = virtio_net_init_pci, |
814 |
.exit = virtio_net_exit_pci, |
815 |
.romfile = "pxe-virtio.rom",
|
816 |
.vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET, |
817 |
.device_id = PCI_DEVICE_ID_VIRTIO_NET, |
818 |
.revision = VIRTIO_PCI_ABI_VERSION, |
819 |
.class_id = PCI_CLASS_NETWORK_ETHERNET, |
820 |
.qdev.props = (Property[]) { |
821 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
|
822 |
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
|
823 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), |
824 |
DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), |
825 |
DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic), |
826 |
DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy,
|
827 |
net.txtimer, TX_TIMER_INTERVAL), |
828 |
DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy,
|
829 |
net.txburst, TX_BURST), |
830 |
DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
|
831 |
DEFINE_PROP_END_OF_LIST(), |
832 |
}, |
833 |
.qdev.reset = virtio_pci_reset, |
834 |
},{ |
835 |
.qdev.name = "virtio-serial-pci",
|
836 |
.qdev.alias = "virtio-serial",
|
837 |
.qdev.size = sizeof(VirtIOPCIProxy),
|
838 |
.init = virtio_serial_init_pci, |
839 |
.exit = virtio_serial_exit_pci, |
840 |
.vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET, |
841 |
.device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE, |
842 |
.revision = VIRTIO_PCI_ABI_VERSION, |
843 |
.class_id = PCI_CLASS_COMMUNICATION_OTHER, |
844 |
.qdev.props = (Property[]) { |
845 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
|
846 |
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
|
847 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
|
848 |
DEV_NVECTORS_UNSPECIFIED), |
849 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
850 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
851 |
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy,
|
852 |
serial.max_virtserial_ports, 31),
|
853 |
DEFINE_PROP_END_OF_LIST(), |
854 |
}, |
855 |
.qdev.reset = virtio_pci_reset, |
856 |
},{ |
857 |
.qdev.name = "virtio-balloon-pci",
|
858 |
.qdev.alias = "virtio-balloon",
|
859 |
.qdev.size = sizeof(VirtIOPCIProxy),
|
860 |
.init = virtio_balloon_init_pci, |
861 |
.exit = virtio_balloon_exit_pci, |
862 |
.vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET, |
863 |
.device_id = PCI_DEVICE_ID_VIRTIO_BALLOON, |
864 |
.revision = VIRTIO_PCI_ABI_VERSION, |
865 |
.class_id = PCI_CLASS_MEMORY_RAM, |
866 |
.qdev.props = (Property[]) { |
867 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
868 |
DEFINE_PROP_END_OF_LIST(), |
869 |
}, |
870 |
.qdev.reset = virtio_pci_reset, |
871 |
},{ |
872 |
/* end of list */
|
873 |
} |
874 |
}; |
875 |
|
876 |
static void virtio_pci_register_devices(void) |
877 |
{ |
878 |
pci_qdev_register_many(virtio_info); |
879 |
} |
880 |
|
881 |
device_init(virtio_pci_register_devices) |