root / hw / virtio / virtio-pci.c @ 49ab747f
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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 "hw/virtio/virtio.h" |
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#include "hw/virtio/virtio-blk.h" |
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#include "hw/virtio/virtio-net.h" |
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#include "hw/virtio/virtio-serial.h" |
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#include "hw/virtio/virtio-scsi.h" |
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#include "hw/virtio/virtio-balloon.h" |
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#include "hw/pci/pci.h" |
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#include "qemu/error-report.h" |
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#include "hw/pci/msi.h" |
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#include "hw/pci/msix.h" |
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#include "hw/loader.h" |
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#include "sysemu/kvm.h" |
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#include "sysemu/blockdev.h" |
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#include "hw/virtio-pci.h" |
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#include "qemu/range.h" |
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#include "hw/virtio/virtio-bus.h" |
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/* from Linux's linux/virtio_pci.h */
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/* A 32-bit r/o bitmask of the features supported by the host */
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#define VIRTIO_PCI_HOST_FEATURES 0 |
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/* A 32-bit r/w bitmask of features activated by the guest */
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#define VIRTIO_PCI_GUEST_FEATURES 4 |
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/* A 32-bit r/w PFN for the currently selected queue */
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#define VIRTIO_PCI_QUEUE_PFN 8 |
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/* A 16-bit r/o queue size for the currently selected queue */
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#define VIRTIO_PCI_QUEUE_NUM 12 |
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/* A 16-bit r/w queue selector */
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#define VIRTIO_PCI_QUEUE_SEL 14 |
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/* A 16-bit r/w queue notifier */
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#define VIRTIO_PCI_QUEUE_NOTIFY 16 |
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/* An 8-bit device status register. */
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#define VIRTIO_PCI_STATUS 18 |
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/* An 8-bit r/o interrupt status register. Reading the value will return the
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* current contents of the ISR and will also clear it. This is effectively
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* a read-and-acknowledge. */
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#define VIRTIO_PCI_ISR 19 |
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/* MSI-X registers: only enabled if MSI-X is enabled. */
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/* A 16-bit vector for configuration changes. */
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#define VIRTIO_MSI_CONFIG_VECTOR 20 |
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/* A 16-bit vector for selected queue notifications. */
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#define VIRTIO_MSI_QUEUE_VECTOR 22 |
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/* Config space size */
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#define VIRTIO_PCI_CONFIG_NOMSI 20 |
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#define VIRTIO_PCI_CONFIG_MSI 24 |
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#define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \
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VIRTIO_PCI_CONFIG_MSI : \ |
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VIRTIO_PCI_CONFIG_NOMSI) |
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/* The remaining space is defined by each driver as the per-driver
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* configuration space */
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#define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \
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VIRTIO_PCI_CONFIG_MSI : \ |
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VIRTIO_PCI_CONFIG_NOMSI) |
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/* How many bits to shift physical queue address written to QUEUE_PFN.
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* 12 is historical, and due to x86 page size. */
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#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 |
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/* Flags track per-device state like workarounds for quirks in older guests. */
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#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0) |
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/* QEMU doesn't strictly need write barriers since everything runs in
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* lock-step. We'll leave the calls to wmb() in though to make it obvious for
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* KVM or if kqemu gets SMP support.
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*/
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#define wmb() do { } while (0) |
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/* HACK for virtio to determine if it's running a big endian guest */
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bool virtio_is_big_endian(void); |
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/* virtio device */
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/* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
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static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d) |
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{ |
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return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
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} |
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/* DeviceState to VirtIOPCIProxy. Note: used on datapath,
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* be careful and test performance if you change this.
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*/
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static inline VirtIOPCIProxy *to_virtio_pci_proxy_fast(DeviceState *d) |
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{ |
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return container_of(d, VirtIOPCIProxy, pci_dev.qdev);
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} |
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static void virtio_pci_notify(DeviceState *d, uint16_t vector) |
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{ |
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VirtIOPCIProxy *proxy = to_virtio_pci_proxy_fast(d); |
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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(DeviceState *d, QEMUFile *f) |
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{ |
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VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
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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(DeviceState *d, int n, QEMUFile *f) |
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{ |
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VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
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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(DeviceState *d, QEMUFile *f) |
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{ |
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VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
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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(DeviceState *d, int n, QEMUFile *f) |
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{ |
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VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
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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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static void virtio_pci_reset(DeviceState *d) |
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{ |
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VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
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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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if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
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virtio_pci_start_ioeventfd(proxy); |
310 |
} |
311 |
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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); |
315 |
} |
316 |
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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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320 |
if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
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!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
322 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
323 |
} |
324 |
break;
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case VIRTIO_MSI_CONFIG_VECTOR:
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msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); |
327 |
/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0) |
329 |
val = VIRTIO_NO_VECTOR; |
330 |
vdev->config_vector = val; |
331 |
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)); |
335 |
/* Make it possible for guest to discover an error took place. */
|
336 |
if (msix_vector_use(&proxy->pci_dev, val) < 0) |
337 |
val = VIRTIO_NO_VECTOR; |
338 |
virtio_queue_set_vector(vdev, vdev->queue_sel, val); |
339 |
break;
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340 |
default:
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341 |
error_report("%s: unexpected address 0x%x value 0x%x",
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342 |
__func__, addr, val); |
343 |
break;
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344 |
} |
345 |
} |
346 |
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static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
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{ |
349 |
VirtIODevice *vdev = proxy->vdev; |
350 |
uint32_t ret = 0xFFFFFFFF;
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351 |
|
352 |
switch (addr) {
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353 |
case VIRTIO_PCI_HOST_FEATURES:
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ret = proxy->host_features; |
355 |
break;
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356 |
case VIRTIO_PCI_GUEST_FEATURES:
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ret = vdev->guest_features; |
358 |
break;
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359 |
case VIRTIO_PCI_QUEUE_PFN:
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360 |
ret = virtio_queue_get_addr(vdev, vdev->queue_sel) |
361 |
>> VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
362 |
break;
|
363 |
case VIRTIO_PCI_QUEUE_NUM:
|
364 |
ret = virtio_queue_get_num(vdev, vdev->queue_sel); |
365 |
break;
|
366 |
case VIRTIO_PCI_QUEUE_SEL:
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367 |
ret = vdev->queue_sel; |
368 |
break;
|
369 |
case VIRTIO_PCI_STATUS:
|
370 |
ret = vdev->status; |
371 |
break;
|
372 |
case VIRTIO_PCI_ISR:
|
373 |
/* reading from the ISR also clears it. */
|
374 |
ret = vdev->isr; |
375 |
vdev->isr = 0;
|
376 |
qemu_set_irq(proxy->pci_dev.irq[0], 0); |
377 |
break;
|
378 |
case VIRTIO_MSI_CONFIG_VECTOR:
|
379 |
ret = vdev->config_vector; |
380 |
break;
|
381 |
case VIRTIO_MSI_QUEUE_VECTOR:
|
382 |
ret = virtio_queue_vector(vdev, vdev->queue_sel); |
383 |
break;
|
384 |
default:
|
385 |
break;
|
386 |
} |
387 |
|
388 |
return ret;
|
389 |
} |
390 |
|
391 |
static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, |
392 |
unsigned size)
|
393 |
{ |
394 |
VirtIOPCIProxy *proxy = opaque; |
395 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
396 |
uint64_t val = 0;
|
397 |
if (addr < config) {
|
398 |
return virtio_ioport_read(proxy, addr);
|
399 |
} |
400 |
addr -= config; |
401 |
|
402 |
switch (size) {
|
403 |
case 1: |
404 |
val = virtio_config_readb(proxy->vdev, addr); |
405 |
break;
|
406 |
case 2: |
407 |
val = virtio_config_readw(proxy->vdev, addr); |
408 |
if (virtio_is_big_endian()) {
|
409 |
val = bswap16(val); |
410 |
} |
411 |
break;
|
412 |
case 4: |
413 |
val = virtio_config_readl(proxy->vdev, addr); |
414 |
if (virtio_is_big_endian()) {
|
415 |
val = bswap32(val); |
416 |
} |
417 |
break;
|
418 |
} |
419 |
return val;
|
420 |
} |
421 |
|
422 |
static void virtio_pci_config_write(void *opaque, hwaddr addr, |
423 |
uint64_t val, unsigned size)
|
424 |
{ |
425 |
VirtIOPCIProxy *proxy = opaque; |
426 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
427 |
if (addr < config) {
|
428 |
virtio_ioport_write(proxy, addr, val); |
429 |
return;
|
430 |
} |
431 |
addr -= config; |
432 |
/*
|
433 |
* Virtio-PCI is odd. Ioports are LE but config space is target native
|
434 |
* endian.
|
435 |
*/
|
436 |
switch (size) {
|
437 |
case 1: |
438 |
virtio_config_writeb(proxy->vdev, addr, val); |
439 |
break;
|
440 |
case 2: |
441 |
if (virtio_is_big_endian()) {
|
442 |
val = bswap16(val); |
443 |
} |
444 |
virtio_config_writew(proxy->vdev, addr, val); |
445 |
break;
|
446 |
case 4: |
447 |
if (virtio_is_big_endian()) {
|
448 |
val = bswap32(val); |
449 |
} |
450 |
virtio_config_writel(proxy->vdev, addr, val); |
451 |
break;
|
452 |
} |
453 |
} |
454 |
|
455 |
static const MemoryRegionOps virtio_pci_config_ops = { |
456 |
.read = virtio_pci_config_read, |
457 |
.write = virtio_pci_config_write, |
458 |
.impl = { |
459 |
.min_access_size = 1,
|
460 |
.max_access_size = 4,
|
461 |
}, |
462 |
.endianness = DEVICE_LITTLE_ENDIAN, |
463 |
}; |
464 |
|
465 |
static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, |
466 |
uint32_t val, int len)
|
467 |
{ |
468 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
469 |
|
470 |
pci_default_write_config(pci_dev, address, val, len); |
471 |
|
472 |
if (range_covers_byte(address, len, PCI_COMMAND) &&
|
473 |
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && |
474 |
!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { |
475 |
virtio_pci_stop_ioeventfd(proxy); |
476 |
virtio_set_status(proxy->vdev, |
477 |
proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); |
478 |
} |
479 |
} |
480 |
|
481 |
static unsigned virtio_pci_get_features(DeviceState *d) |
482 |
{ |
483 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
484 |
return proxy->host_features;
|
485 |
} |
486 |
|
487 |
static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, |
488 |
unsigned int queue_no, |
489 |
unsigned int vector, |
490 |
MSIMessage msg) |
491 |
{ |
492 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
493 |
int ret;
|
494 |
|
495 |
if (irqfd->users == 0) { |
496 |
ret = kvm_irqchip_add_msi_route(kvm_state, msg); |
497 |
if (ret < 0) { |
498 |
return ret;
|
499 |
} |
500 |
irqfd->virq = ret; |
501 |
} |
502 |
irqfd->users++; |
503 |
return 0; |
504 |
} |
505 |
|
506 |
static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, |
507 |
unsigned int vector) |
508 |
{ |
509 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
510 |
if (--irqfd->users == 0) { |
511 |
kvm_irqchip_release_virq(kvm_state, irqfd->virq); |
512 |
} |
513 |
} |
514 |
|
515 |
static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy, |
516 |
unsigned int queue_no, |
517 |
unsigned int vector) |
518 |
{ |
519 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
520 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
521 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
522 |
int ret;
|
523 |
ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq); |
524 |
return ret;
|
525 |
} |
526 |
|
527 |
static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy, |
528 |
unsigned int queue_no, |
529 |
unsigned int vector) |
530 |
{ |
531 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
532 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
533 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
534 |
int ret;
|
535 |
|
536 |
ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); |
537 |
assert(ret == 0);
|
538 |
} |
539 |
|
540 |
static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs) |
541 |
{ |
542 |
PCIDevice *dev = &proxy->pci_dev; |
543 |
VirtIODevice *vdev = proxy->vdev; |
544 |
unsigned int vector; |
545 |
int ret, queue_no;
|
546 |
MSIMessage msg; |
547 |
|
548 |
for (queue_no = 0; queue_no < nvqs; queue_no++) { |
549 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
550 |
break;
|
551 |
} |
552 |
vector = virtio_queue_vector(vdev, queue_no); |
553 |
if (vector >= msix_nr_vectors_allocated(dev)) {
|
554 |
continue;
|
555 |
} |
556 |
msg = msix_get_message(dev, vector); |
557 |
ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); |
558 |
if (ret < 0) { |
559 |
goto undo;
|
560 |
} |
561 |
/* If guest supports masking, set up irqfd now.
|
562 |
* Otherwise, delay until unmasked in the frontend.
|
563 |
*/
|
564 |
if (proxy->vdev->guest_notifier_mask) {
|
565 |
ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); |
566 |
if (ret < 0) { |
567 |
kvm_virtio_pci_vq_vector_release(proxy, vector); |
568 |
goto undo;
|
569 |
} |
570 |
} |
571 |
} |
572 |
return 0; |
573 |
|
574 |
undo:
|
575 |
while (--queue_no >= 0) { |
576 |
vector = virtio_queue_vector(vdev, queue_no); |
577 |
if (vector >= msix_nr_vectors_allocated(dev)) {
|
578 |
continue;
|
579 |
} |
580 |
if (proxy->vdev->guest_notifier_mask) {
|
581 |
kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); |
582 |
} |
583 |
kvm_virtio_pci_vq_vector_release(proxy, vector); |
584 |
} |
585 |
return ret;
|
586 |
} |
587 |
|
588 |
static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs) |
589 |
{ |
590 |
PCIDevice *dev = &proxy->pci_dev; |
591 |
VirtIODevice *vdev = proxy->vdev; |
592 |
unsigned int vector; |
593 |
int queue_no;
|
594 |
|
595 |
for (queue_no = 0; queue_no < nvqs; queue_no++) { |
596 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
597 |
break;
|
598 |
} |
599 |
vector = virtio_queue_vector(vdev, queue_no); |
600 |
if (vector >= msix_nr_vectors_allocated(dev)) {
|
601 |
continue;
|
602 |
} |
603 |
/* If guest supports masking, clean up irqfd now.
|
604 |
* Otherwise, it was cleaned when masked in the frontend.
|
605 |
*/
|
606 |
if (proxy->vdev->guest_notifier_mask) {
|
607 |
kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); |
608 |
} |
609 |
kvm_virtio_pci_vq_vector_release(proxy, vector); |
610 |
} |
611 |
} |
612 |
|
613 |
static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy, |
614 |
unsigned int queue_no, |
615 |
unsigned int vector, |
616 |
MSIMessage msg) |
617 |
{ |
618 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
619 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
620 |
VirtIOIRQFD *irqfd; |
621 |
int ret = 0; |
622 |
|
623 |
if (proxy->vector_irqfd) {
|
624 |
irqfd = &proxy->vector_irqfd[vector]; |
625 |
if (irqfd->msg.data != msg.data || irqfd->msg.address != msg.address) {
|
626 |
ret = kvm_irqchip_update_msi_route(kvm_state, irqfd->virq, msg); |
627 |
if (ret < 0) { |
628 |
return ret;
|
629 |
} |
630 |
} |
631 |
} |
632 |
|
633 |
/* If guest supports masking, irqfd is already setup, unmask it.
|
634 |
* Otherwise, set it up now.
|
635 |
*/
|
636 |
if (proxy->vdev->guest_notifier_mask) {
|
637 |
proxy->vdev->guest_notifier_mask(proxy->vdev, queue_no, false);
|
638 |
/* Test after unmasking to avoid losing events. */
|
639 |
if (proxy->vdev->guest_notifier_pending &&
|
640 |
proxy->vdev->guest_notifier_pending(proxy->vdev, queue_no)) { |
641 |
event_notifier_set(n); |
642 |
} |
643 |
} else {
|
644 |
ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector); |
645 |
} |
646 |
return ret;
|
647 |
} |
648 |
|
649 |
static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy, |
650 |
unsigned int queue_no, |
651 |
unsigned int vector) |
652 |
{ |
653 |
/* If guest supports masking, keep irqfd but mask it.
|
654 |
* Otherwise, clean it up now.
|
655 |
*/
|
656 |
if (proxy->vdev->guest_notifier_mask) {
|
657 |
proxy->vdev->guest_notifier_mask(proxy->vdev, queue_no, true);
|
658 |
} else {
|
659 |
kvm_virtio_pci_irqfd_release(proxy, queue_no, vector); |
660 |
} |
661 |
} |
662 |
|
663 |
static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector, |
664 |
MSIMessage msg) |
665 |
{ |
666 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
667 |
VirtIODevice *vdev = proxy->vdev; |
668 |
int ret, queue_no;
|
669 |
|
670 |
for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { |
671 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
672 |
break;
|
673 |
} |
674 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
675 |
continue;
|
676 |
} |
677 |
ret = virtio_pci_vq_vector_unmask(proxy, queue_no, vector, msg); |
678 |
if (ret < 0) { |
679 |
goto undo;
|
680 |
} |
681 |
} |
682 |
return 0; |
683 |
|
684 |
undo:
|
685 |
while (--queue_no >= 0) { |
686 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
687 |
continue;
|
688 |
} |
689 |
virtio_pci_vq_vector_mask(proxy, queue_no, vector); |
690 |
} |
691 |
return ret;
|
692 |
} |
693 |
|
694 |
static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector) |
695 |
{ |
696 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
697 |
VirtIODevice *vdev = proxy->vdev; |
698 |
int queue_no;
|
699 |
|
700 |
for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { |
701 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
702 |
break;
|
703 |
} |
704 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
705 |
continue;
|
706 |
} |
707 |
virtio_pci_vq_vector_mask(proxy, queue_no, vector); |
708 |
} |
709 |
} |
710 |
|
711 |
static void virtio_pci_vector_poll(PCIDevice *dev, |
712 |
unsigned int vector_start, |
713 |
unsigned int vector_end) |
714 |
{ |
715 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
716 |
VirtIODevice *vdev = proxy->vdev; |
717 |
int queue_no;
|
718 |
unsigned int vector; |
719 |
EventNotifier *notifier; |
720 |
VirtQueue *vq; |
721 |
|
722 |
for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) { |
723 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
724 |
break;
|
725 |
} |
726 |
vector = virtio_queue_vector(vdev, queue_no); |
727 |
if (vector < vector_start || vector >= vector_end ||
|
728 |
!msix_is_masked(dev, vector)) { |
729 |
continue;
|
730 |
} |
731 |
vq = virtio_get_queue(vdev, queue_no); |
732 |
notifier = virtio_queue_get_guest_notifier(vq); |
733 |
if (vdev->guest_notifier_pending) {
|
734 |
if (vdev->guest_notifier_pending(vdev, queue_no)) {
|
735 |
msix_set_pending(dev, vector); |
736 |
} |
737 |
} else if (event_notifier_test_and_clear(notifier)) { |
738 |
msix_set_pending(dev, vector); |
739 |
} |
740 |
} |
741 |
} |
742 |
|
743 |
static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, |
744 |
bool with_irqfd)
|
745 |
{ |
746 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
747 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
748 |
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); |
749 |
|
750 |
if (assign) {
|
751 |
int r = event_notifier_init(notifier, 0); |
752 |
if (r < 0) { |
753 |
return r;
|
754 |
} |
755 |
virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
|
756 |
} else {
|
757 |
virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
|
758 |
event_notifier_cleanup(notifier); |
759 |
} |
760 |
|
761 |
return 0; |
762 |
} |
763 |
|
764 |
static bool virtio_pci_query_guest_notifiers(DeviceState *d) |
765 |
{ |
766 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
767 |
return msix_enabled(&proxy->pci_dev);
|
768 |
} |
769 |
|
770 |
static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign) |
771 |
{ |
772 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
773 |
VirtIODevice *vdev = proxy->vdev; |
774 |
int r, n;
|
775 |
bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
|
776 |
kvm_msi_via_irqfd_enabled(); |
777 |
|
778 |
nvqs = MIN(nvqs, VIRTIO_PCI_QUEUE_MAX); |
779 |
|
780 |
/* When deassigning, pass a consistent nvqs value
|
781 |
* to avoid leaking notifiers.
|
782 |
*/
|
783 |
assert(assign || nvqs == proxy->nvqs_with_notifiers); |
784 |
|
785 |
proxy->nvqs_with_notifiers = nvqs; |
786 |
|
787 |
/* Must unset vector notifier while guest notifier is still assigned */
|
788 |
if ((proxy->vector_irqfd || vdev->guest_notifier_mask) && !assign) {
|
789 |
msix_unset_vector_notifiers(&proxy->pci_dev); |
790 |
if (proxy->vector_irqfd) {
|
791 |
kvm_virtio_pci_vector_release(proxy, nvqs); |
792 |
g_free(proxy->vector_irqfd); |
793 |
proxy->vector_irqfd = NULL;
|
794 |
} |
795 |
} |
796 |
|
797 |
for (n = 0; n < nvqs; n++) { |
798 |
if (!virtio_queue_get_num(vdev, n)) {
|
799 |
break;
|
800 |
} |
801 |
|
802 |
r = virtio_pci_set_guest_notifier(d, n, assign, |
803 |
kvm_msi_via_irqfd_enabled()); |
804 |
if (r < 0) { |
805 |
goto assign_error;
|
806 |
} |
807 |
} |
808 |
|
809 |
/* Must set vector notifier after guest notifier has been assigned */
|
810 |
if ((with_irqfd || vdev->guest_notifier_mask) && assign) {
|
811 |
if (with_irqfd) {
|
812 |
proxy->vector_irqfd = |
813 |
g_malloc0(sizeof(*proxy->vector_irqfd) *
|
814 |
msix_nr_vectors_allocated(&proxy->pci_dev)); |
815 |
r = kvm_virtio_pci_vector_use(proxy, nvqs); |
816 |
if (r < 0) { |
817 |
goto assign_error;
|
818 |
} |
819 |
} |
820 |
r = msix_set_vector_notifiers(&proxy->pci_dev, |
821 |
virtio_pci_vector_unmask, |
822 |
virtio_pci_vector_mask, |
823 |
virtio_pci_vector_poll); |
824 |
if (r < 0) { |
825 |
goto notifiers_error;
|
826 |
} |
827 |
} |
828 |
|
829 |
return 0; |
830 |
|
831 |
notifiers_error:
|
832 |
if (with_irqfd) {
|
833 |
assert(assign); |
834 |
kvm_virtio_pci_vector_release(proxy, nvqs); |
835 |
} |
836 |
|
837 |
assign_error:
|
838 |
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
|
839 |
assert(assign); |
840 |
while (--n >= 0) { |
841 |
virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); |
842 |
} |
843 |
return r;
|
844 |
} |
845 |
|
846 |
static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) |
847 |
{ |
848 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
849 |
|
850 |
/* Stop using ioeventfd for virtqueue kick if the device starts using host
|
851 |
* notifiers. This makes it easy to avoid stepping on each others' toes.
|
852 |
*/
|
853 |
proxy->ioeventfd_disabled = assign; |
854 |
if (assign) {
|
855 |
virtio_pci_stop_ioeventfd(proxy); |
856 |
} |
857 |
/* We don't need to start here: it's not needed because backend
|
858 |
* currently only stops on status change away from ok,
|
859 |
* reset, vmstop and such. If we do add code to start here,
|
860 |
* need to check vmstate, device state etc. */
|
861 |
return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); |
862 |
} |
863 |
|
864 |
static void virtio_pci_vmstate_change(DeviceState *d, bool running) |
865 |
{ |
866 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
867 |
|
868 |
if (running) {
|
869 |
/* Try to find out if the guest has bus master disabled, but is
|
870 |
in ready state. Then we have a buggy guest OS. */
|
871 |
if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
872 |
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
873 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
874 |
} |
875 |
virtio_pci_start_ioeventfd(proxy); |
876 |
} else {
|
877 |
virtio_pci_stop_ioeventfd(proxy); |
878 |
} |
879 |
} |
880 |
|
881 |
static const VirtIOBindings virtio_pci_bindings = { |
882 |
.notify = virtio_pci_notify, |
883 |
.save_config = virtio_pci_save_config, |
884 |
.load_config = virtio_pci_load_config, |
885 |
.save_queue = virtio_pci_save_queue, |
886 |
.load_queue = virtio_pci_load_queue, |
887 |
.get_features = virtio_pci_get_features, |
888 |
.query_guest_notifiers = virtio_pci_query_guest_notifiers, |
889 |
.set_host_notifier = virtio_pci_set_host_notifier, |
890 |
.set_guest_notifiers = virtio_pci_set_guest_notifiers, |
891 |
.vmstate_change = virtio_pci_vmstate_change, |
892 |
}; |
893 |
|
894 |
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
|
895 |
{ |
896 |
uint8_t *config; |
897 |
uint32_t size; |
898 |
|
899 |
proxy->vdev = vdev; |
900 |
|
901 |
config = proxy->pci_dev.config; |
902 |
|
903 |
if (proxy->class_code) {
|
904 |
pci_config_set_class(config, proxy->class_code); |
905 |
} |
906 |
pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, |
907 |
pci_get_word(config + PCI_VENDOR_ID)); |
908 |
pci_set_word(config + PCI_SUBSYSTEM_ID, vdev->device_id); |
909 |
config[PCI_INTERRUPT_PIN] = 1;
|
910 |
|
911 |
if (vdev->nvectors &&
|
912 |
msix_init_exclusive_bar(&proxy->pci_dev, vdev->nvectors, 1)) {
|
913 |
vdev->nvectors = 0;
|
914 |
} |
915 |
|
916 |
proxy->pci_dev.config_write = virtio_write_config; |
917 |
|
918 |
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len; |
919 |
if (size & (size-1)) |
920 |
size = 1 << qemu_fls(size);
|
921 |
|
922 |
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, |
923 |
"virtio-pci", size);
|
924 |
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
|
925 |
&proxy->bar); |
926 |
|
927 |
if (!kvm_has_many_ioeventfds()) {
|
928 |
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; |
929 |
} |
930 |
|
931 |
virtio_bind_device(vdev, &virtio_pci_bindings, DEVICE(proxy)); |
932 |
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
|
933 |
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
|
934 |
proxy->host_features = vdev->get_features(vdev, proxy->host_features); |
935 |
} |
936 |
|
937 |
static void virtio_exit_pci(PCIDevice *pci_dev) |
938 |
{ |
939 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
940 |
|
941 |
memory_region_destroy(&proxy->bar); |
942 |
msix_uninit_exclusive_bar(pci_dev); |
943 |
} |
944 |
|
945 |
static int virtio_serial_init_pci(PCIDevice *pci_dev) |
946 |
{ |
947 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
948 |
VirtIODevice *vdev; |
949 |
|
950 |
if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
|
951 |
proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
|
952 |
proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
|
953 |
proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER; |
954 |
|
955 |
vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial); |
956 |
if (!vdev) {
|
957 |
return -1; |
958 |
} |
959 |
|
960 |
/* backwards-compatibility with machines that were created with
|
961 |
DEV_NVECTORS_UNSPECIFIED */
|
962 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
963 |
? proxy->serial.max_virtserial_ports + 1
|
964 |
: proxy->nvectors; |
965 |
virtio_init_pci(proxy, vdev); |
966 |
proxy->nvectors = vdev->nvectors; |
967 |
return 0; |
968 |
} |
969 |
|
970 |
static void virtio_serial_exit_pci(PCIDevice *pci_dev) |
971 |
{ |
972 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
973 |
|
974 |
virtio_pci_stop_ioeventfd(proxy); |
975 |
virtio_serial_exit(proxy->vdev); |
976 |
virtio_exit_pci(pci_dev); |
977 |
} |
978 |
|
979 |
static int virtio_net_init_pci(PCIDevice *pci_dev) |
980 |
{ |
981 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
982 |
VirtIODevice *vdev; |
983 |
|
984 |
vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net, |
985 |
proxy->host_features); |
986 |
|
987 |
vdev->nvectors = proxy->nvectors; |
988 |
virtio_init_pci(proxy, vdev); |
989 |
|
990 |
/* make the actual value visible */
|
991 |
proxy->nvectors = vdev->nvectors; |
992 |
return 0; |
993 |
} |
994 |
|
995 |
static void virtio_net_exit_pci(PCIDevice *pci_dev) |
996 |
{ |
997 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
998 |
|
999 |
virtio_pci_stop_ioeventfd(proxy); |
1000 |
virtio_net_exit(proxy->vdev); |
1001 |
virtio_exit_pci(pci_dev); |
1002 |
} |
1003 |
|
1004 |
static int virtio_rng_init_pci(PCIDevice *pci_dev) |
1005 |
{ |
1006 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1007 |
VirtIODevice *vdev; |
1008 |
|
1009 |
if (proxy->rng.rng == NULL) { |
1010 |
proxy->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM)); |
1011 |
|
1012 |
object_property_add_child(OBJECT(pci_dev), |
1013 |
"default-backend",
|
1014 |
OBJECT(proxy->rng.default_backend), |
1015 |
NULL);
|
1016 |
|
1017 |
object_property_set_link(OBJECT(pci_dev), |
1018 |
OBJECT(proxy->rng.default_backend), |
1019 |
"rng", NULL); |
1020 |
} |
1021 |
|
1022 |
vdev = virtio_rng_init(&pci_dev->qdev, &proxy->rng); |
1023 |
if (!vdev) {
|
1024 |
return -1; |
1025 |
} |
1026 |
virtio_init_pci(proxy, vdev); |
1027 |
return 0; |
1028 |
} |
1029 |
|
1030 |
static void virtio_rng_exit_pci(PCIDevice *pci_dev) |
1031 |
{ |
1032 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1033 |
|
1034 |
virtio_pci_stop_ioeventfd(proxy); |
1035 |
virtio_rng_exit(proxy->vdev); |
1036 |
virtio_exit_pci(pci_dev); |
1037 |
} |
1038 |
|
1039 |
static Property virtio_net_properties[] = {
|
1040 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), |
1041 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), |
1042 |
DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), |
1043 |
DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic), |
1044 |
DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy, net.txtimer, TX_TIMER_INTERVAL),
|
1045 |
DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy, net.txburst, TX_BURST),
|
1046 |
DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
|
1047 |
DEFINE_PROP_END_OF_LIST(), |
1048 |
}; |
1049 |
|
1050 |
static void virtio_net_class_init(ObjectClass *klass, void *data) |
1051 |
{ |
1052 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1053 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1054 |
|
1055 |
k->init = virtio_net_init_pci; |
1056 |
k->exit = virtio_net_exit_pci; |
1057 |
k->romfile = "efi-virtio.rom";
|
1058 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1059 |
k->device_id = PCI_DEVICE_ID_VIRTIO_NET; |
1060 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1061 |
k->class_id = PCI_CLASS_NETWORK_ETHERNET; |
1062 |
dc->reset = virtio_pci_reset; |
1063 |
dc->props = virtio_net_properties; |
1064 |
} |
1065 |
|
1066 |
static const TypeInfo virtio_net_info = { |
1067 |
.name = "virtio-net-pci",
|
1068 |
.parent = TYPE_PCI_DEVICE, |
1069 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1070 |
.class_init = virtio_net_class_init, |
1071 |
}; |
1072 |
|
1073 |
static Property virtio_serial_properties[] = {
|
1074 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
1075 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
1076 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
1077 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1078 |
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31), |
1079 |
DEFINE_PROP_END_OF_LIST(), |
1080 |
}; |
1081 |
|
1082 |
static void virtio_serial_class_init(ObjectClass *klass, void *data) |
1083 |
{ |
1084 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1085 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1086 |
|
1087 |
k->init = virtio_serial_init_pci; |
1088 |
k->exit = virtio_serial_exit_pci; |
1089 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1090 |
k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; |
1091 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1092 |
k->class_id = PCI_CLASS_COMMUNICATION_OTHER; |
1093 |
dc->reset = virtio_pci_reset; |
1094 |
dc->props = virtio_serial_properties; |
1095 |
} |
1096 |
|
1097 |
static const TypeInfo virtio_serial_info = { |
1098 |
.name = "virtio-serial-pci",
|
1099 |
.parent = TYPE_PCI_DEVICE, |
1100 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1101 |
.class_init = virtio_serial_class_init, |
1102 |
}; |
1103 |
|
1104 |
static void virtio_rng_initfn(Object *obj) |
1105 |
{ |
1106 |
PCIDevice *pci_dev = PCI_DEVICE(obj); |
1107 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1108 |
|
1109 |
object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
|
1110 |
(Object **)&proxy->rng.rng, NULL);
|
1111 |
} |
1112 |
|
1113 |
static Property virtio_rng_properties[] = {
|
1114 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1115 |
/* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If
|
1116 |
you have an entropy source capable of generating more entropy than this
|
1117 |
and you can pass it through via virtio-rng, then hats off to you. Until
|
1118 |
then, this is unlimited for all practical purposes.
|
1119 |
*/
|
1120 |
DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy, rng.max_bytes, INT64_MAX),
|
1121 |
DEFINE_PROP_UINT32("period", VirtIOPCIProxy, rng.period_ms, 1 << 16), |
1122 |
DEFINE_PROP_END_OF_LIST(), |
1123 |
}; |
1124 |
|
1125 |
static void virtio_rng_class_init(ObjectClass *klass, void *data) |
1126 |
{ |
1127 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1128 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1129 |
|
1130 |
k->init = virtio_rng_init_pci; |
1131 |
k->exit = virtio_rng_exit_pci; |
1132 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1133 |
k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; |
1134 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1135 |
k->class_id = PCI_CLASS_OTHERS; |
1136 |
dc->reset = virtio_pci_reset; |
1137 |
dc->props = virtio_rng_properties; |
1138 |
} |
1139 |
|
1140 |
static const TypeInfo virtio_rng_info = { |
1141 |
.name = "virtio-rng-pci",
|
1142 |
.parent = TYPE_PCI_DEVICE, |
1143 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1144 |
.instance_init = virtio_rng_initfn, |
1145 |
.class_init = virtio_rng_class_init, |
1146 |
}; |
1147 |
|
1148 |
#ifdef CONFIG_VIRTFS
|
1149 |
static int virtio_9p_init_pci(PCIDevice *pci_dev) |
1150 |
{ |
1151 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1152 |
VirtIODevice *vdev; |
1153 |
|
1154 |
vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf); |
1155 |
vdev->nvectors = proxy->nvectors; |
1156 |
virtio_init_pci(proxy, vdev); |
1157 |
/* make the actual value visible */
|
1158 |
proxy->nvectors = vdev->nvectors; |
1159 |
return 0; |
1160 |
} |
1161 |
|
1162 |
static Property virtio_9p_properties[] = {
|
1163 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
1164 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
1165 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1166 |
DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
|
1167 |
DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
|
1168 |
DEFINE_PROP_END_OF_LIST(), |
1169 |
}; |
1170 |
|
1171 |
static void virtio_9p_class_init(ObjectClass *klass, void *data) |
1172 |
{ |
1173 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1174 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1175 |
|
1176 |
k->init = virtio_9p_init_pci; |
1177 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1178 |
k->device_id = PCI_DEVICE_ID_VIRTIO_9P; |
1179 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1180 |
k->class_id = 0x2;
|
1181 |
dc->props = virtio_9p_properties; |
1182 |
dc->reset = virtio_pci_reset; |
1183 |
} |
1184 |
|
1185 |
static const TypeInfo virtio_9p_info = { |
1186 |
.name = "virtio-9p-pci",
|
1187 |
.parent = TYPE_PCI_DEVICE, |
1188 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1189 |
.class_init = virtio_9p_class_init, |
1190 |
}; |
1191 |
#endif
|
1192 |
|
1193 |
/*
|
1194 |
* virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
|
1195 |
*/
|
1196 |
|
1197 |
/* This is called by virtio-bus just after the device is plugged. */
|
1198 |
static void virtio_pci_device_plugged(DeviceState *d) |
1199 |
{ |
1200 |
VirtIOPCIProxy *proxy = VIRTIO_PCI(d); |
1201 |
VirtioBusState *bus = &proxy->bus; |
1202 |
uint8_t *config; |
1203 |
uint32_t size; |
1204 |
|
1205 |
proxy->vdev = bus->vdev; |
1206 |
|
1207 |
config = proxy->pci_dev.config; |
1208 |
if (proxy->class_code) {
|
1209 |
pci_config_set_class(config, proxy->class_code); |
1210 |
} |
1211 |
pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, |
1212 |
pci_get_word(config + PCI_VENDOR_ID)); |
1213 |
pci_set_word(config + PCI_SUBSYSTEM_ID, virtio_bus_get_vdev_id(bus)); |
1214 |
config[PCI_INTERRUPT_PIN] = 1;
|
1215 |
|
1216 |
if (proxy->nvectors &&
|
1217 |
msix_init_exclusive_bar(&proxy->pci_dev, proxy->nvectors, 1)) {
|
1218 |
proxy->nvectors = 0;
|
1219 |
} |
1220 |
|
1221 |
proxy->pci_dev.config_write = virtio_write_config; |
1222 |
|
1223 |
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) |
1224 |
+ virtio_bus_get_vdev_config_len(bus); |
1225 |
if (size & (size - 1)) { |
1226 |
size = 1 << qemu_fls(size);
|
1227 |
} |
1228 |
|
1229 |
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, |
1230 |
"virtio-pci", size);
|
1231 |
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
|
1232 |
&proxy->bar); |
1233 |
|
1234 |
if (!kvm_has_many_ioeventfds()) {
|
1235 |
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; |
1236 |
} |
1237 |
|
1238 |
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
|
1239 |
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
|
1240 |
proxy->host_features = virtio_bus_get_vdev_features(bus, |
1241 |
proxy->host_features); |
1242 |
} |
1243 |
|
1244 |
static int virtio_pci_init(PCIDevice *pci_dev) |
1245 |
{ |
1246 |
VirtIOPCIProxy *dev = VIRTIO_PCI(pci_dev); |
1247 |
VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev); |
1248 |
virtio_pci_bus_new(&dev->bus, dev); |
1249 |
if (k->init != NULL) { |
1250 |
return k->init(dev);
|
1251 |
} |
1252 |
return 0; |
1253 |
} |
1254 |
|
1255 |
static void virtio_pci_exit(PCIDevice *pci_dev) |
1256 |
{ |
1257 |
VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev); |
1258 |
virtio_pci_stop_ioeventfd(proxy); |
1259 |
virtio_exit_pci(pci_dev); |
1260 |
} |
1261 |
|
1262 |
/*
|
1263 |
* This will be renamed virtio_pci_reset at the end of the series.
|
1264 |
* virtio_pci_reset is still in use at this moment.
|
1265 |
*/
|
1266 |
static void virtio_pci_rst(DeviceState *qdev) |
1267 |
{ |
1268 |
VirtIOPCIProxy *proxy = VIRTIO_PCI(qdev); |
1269 |
VirtioBusState *bus = VIRTIO_BUS(&proxy->bus); |
1270 |
virtio_pci_stop_ioeventfd(proxy); |
1271 |
virtio_bus_reset(bus); |
1272 |
msix_unuse_all_vectors(&proxy->pci_dev); |
1273 |
proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
1274 |
} |
1275 |
|
1276 |
static void virtio_pci_class_init(ObjectClass *klass, void *data) |
1277 |
{ |
1278 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1279 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1280 |
|
1281 |
k->init = virtio_pci_init; |
1282 |
k->exit = virtio_pci_exit; |
1283 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1284 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1285 |
k->class_id = PCI_CLASS_OTHERS; |
1286 |
dc->reset = virtio_pci_rst; |
1287 |
} |
1288 |
|
1289 |
static const TypeInfo virtio_pci_info = { |
1290 |
.name = TYPE_VIRTIO_PCI, |
1291 |
.parent = TYPE_PCI_DEVICE, |
1292 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1293 |
.class_init = virtio_pci_class_init, |
1294 |
.class_size = sizeof(VirtioPCIClass),
|
1295 |
.abstract = true,
|
1296 |
}; |
1297 |
|
1298 |
/* virtio-blk-pci */
|
1299 |
|
1300 |
static Property virtio_blk_pci_properties[] = {
|
1301 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
1302 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
|
1303 |
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
|
1304 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
1305 |
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
|
1306 |
DEFINE_PROP_BIT("x-data-plane", VirtIOBlkPCI, blk.data_plane, 0, false), |
1307 |
#endif
|
1308 |
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), |
1309 |
DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkPCI, blk), |
1310 |
DEFINE_PROP_END_OF_LIST(), |
1311 |
}; |
1312 |
|
1313 |
static int virtio_blk_pci_init(VirtIOPCIProxy *vpci_dev) |
1314 |
{ |
1315 |
VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev); |
1316 |
DeviceState *vdev = DEVICE(&dev->vdev); |
1317 |
virtio_blk_set_conf(vdev, &(dev->blk)); |
1318 |
qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
1319 |
if (qdev_init(vdev) < 0) { |
1320 |
return -1; |
1321 |
} |
1322 |
return 0; |
1323 |
} |
1324 |
|
1325 |
static void virtio_blk_pci_class_init(ObjectClass *klass, void *data) |
1326 |
{ |
1327 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1328 |
VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); |
1329 |
PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); |
1330 |
|
1331 |
dc->props = virtio_blk_pci_properties; |
1332 |
k->init = virtio_blk_pci_init; |
1333 |
pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1334 |
pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; |
1335 |
pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; |
1336 |
pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; |
1337 |
} |
1338 |
|
1339 |
static void virtio_blk_pci_instance_init(Object *obj) |
1340 |
{ |
1341 |
VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj); |
1342 |
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BLK); |
1343 |
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
1344 |
} |
1345 |
|
1346 |
static const TypeInfo virtio_blk_pci_info = { |
1347 |
.name = TYPE_VIRTIO_BLK_PCI, |
1348 |
.parent = TYPE_VIRTIO_PCI, |
1349 |
.instance_size = sizeof(VirtIOBlkPCI),
|
1350 |
.instance_init = virtio_blk_pci_instance_init, |
1351 |
.class_init = virtio_blk_pci_class_init, |
1352 |
}; |
1353 |
|
1354 |
/* virtio-scsi-pci */
|
1355 |
|
1356 |
static Property virtio_scsi_pci_properties[] = {
|
1357 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
|
1358 |
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
|
1359 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
|
1360 |
DEV_NVECTORS_UNSPECIFIED), |
1361 |
DEFINE_VIRTIO_SCSI_FEATURES(VirtIOPCIProxy, host_features), |
1362 |
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSIPCI, vdev.conf), |
1363 |
DEFINE_PROP_END_OF_LIST(), |
1364 |
}; |
1365 |
|
1366 |
static int virtio_scsi_pci_init_pci(VirtIOPCIProxy *vpci_dev) |
1367 |
{ |
1368 |
VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); |
1369 |
DeviceState *vdev = DEVICE(&dev->vdev); |
1370 |
|
1371 |
if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
|
1372 |
vpci_dev->nvectors = dev->vdev.conf.num_queues + 3;
|
1373 |
} |
1374 |
|
1375 |
qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
1376 |
if (qdev_init(vdev) < 0) { |
1377 |
return -1; |
1378 |
} |
1379 |
return 0; |
1380 |
} |
1381 |
|
1382 |
static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data) |
1383 |
{ |
1384 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1385 |
VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); |
1386 |
PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); |
1387 |
k->init = virtio_scsi_pci_init_pci; |
1388 |
dc->props = virtio_scsi_pci_properties; |
1389 |
pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1390 |
pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; |
1391 |
pcidev_k->revision = 0x00;
|
1392 |
pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI; |
1393 |
} |
1394 |
|
1395 |
static void virtio_scsi_pci_instance_init(Object *obj) |
1396 |
{ |
1397 |
VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj); |
1398 |
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_SCSI); |
1399 |
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
1400 |
} |
1401 |
|
1402 |
static const TypeInfo virtio_scsi_pci_info = { |
1403 |
.name = TYPE_VIRTIO_SCSI_PCI, |
1404 |
.parent = TYPE_VIRTIO_PCI, |
1405 |
.instance_size = sizeof(VirtIOSCSIPCI),
|
1406 |
.instance_init = virtio_scsi_pci_instance_init, |
1407 |
.class_init = virtio_scsi_pci_class_init, |
1408 |
}; |
1409 |
|
1410 |
/* virtio-balloon-pci */
|
1411 |
|
1412 |
static Property virtio_balloon_pci_properties[] = {
|
1413 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1414 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
1415 |
DEFINE_PROP_END_OF_LIST(), |
1416 |
}; |
1417 |
|
1418 |
static int virtio_balloon_pci_init(VirtIOPCIProxy *vpci_dev) |
1419 |
{ |
1420 |
VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(vpci_dev); |
1421 |
DeviceState *vdev = DEVICE(&dev->vdev); |
1422 |
|
1423 |
if (vpci_dev->class_code != PCI_CLASS_OTHERS &&
|
1424 |
vpci_dev->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
|
1425 |
vpci_dev->class_code = PCI_CLASS_OTHERS; |
1426 |
} |
1427 |
|
1428 |
qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); |
1429 |
if (qdev_init(vdev) < 0) { |
1430 |
return -1; |
1431 |
} |
1432 |
return 0; |
1433 |
} |
1434 |
|
1435 |
static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) |
1436 |
{ |
1437 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1438 |
VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); |
1439 |
PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); |
1440 |
k->init = virtio_balloon_pci_init; |
1441 |
dc->props = virtio_balloon_pci_properties; |
1442 |
pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1443 |
pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; |
1444 |
pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; |
1445 |
pcidev_k->class_id = PCI_CLASS_OTHERS; |
1446 |
} |
1447 |
|
1448 |
static void virtio_balloon_pci_instance_init(Object *obj) |
1449 |
{ |
1450 |
VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); |
1451 |
object_initialize(OBJECT(&dev->vdev), TYPE_VIRTIO_BALLOON); |
1452 |
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); |
1453 |
} |
1454 |
|
1455 |
static const TypeInfo virtio_balloon_pci_info = { |
1456 |
.name = TYPE_VIRTIO_BALLOON_PCI, |
1457 |
.parent = TYPE_VIRTIO_PCI, |
1458 |
.instance_size = sizeof(VirtIOBalloonPCI),
|
1459 |
.instance_init = virtio_balloon_pci_instance_init, |
1460 |
.class_init = virtio_balloon_pci_class_init, |
1461 |
}; |
1462 |
|
1463 |
/* virtio-pci-bus */
|
1464 |
|
1465 |
void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev)
|
1466 |
{ |
1467 |
DeviceState *qdev = DEVICE(dev); |
1468 |
BusState *qbus; |
1469 |
qbus_create_inplace((BusState *)bus, TYPE_VIRTIO_PCI_BUS, qdev, NULL);
|
1470 |
qbus = BUS(bus); |
1471 |
qbus->allow_hotplug = 1;
|
1472 |
} |
1473 |
|
1474 |
static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) |
1475 |
{ |
1476 |
BusClass *bus_class = BUS_CLASS(klass); |
1477 |
VirtioBusClass *k = VIRTIO_BUS_CLASS(klass); |
1478 |
bus_class->max_dev = 1;
|
1479 |
k->notify = virtio_pci_notify; |
1480 |
k->save_config = virtio_pci_save_config; |
1481 |
k->load_config = virtio_pci_load_config; |
1482 |
k->save_queue = virtio_pci_save_queue; |
1483 |
k->load_queue = virtio_pci_load_queue; |
1484 |
k->get_features = virtio_pci_get_features; |
1485 |
k->query_guest_notifiers = virtio_pci_query_guest_notifiers; |
1486 |
k->set_host_notifier = virtio_pci_set_host_notifier; |
1487 |
k->set_guest_notifiers = virtio_pci_set_guest_notifiers; |
1488 |
k->vmstate_change = virtio_pci_vmstate_change; |
1489 |
k->device_plugged = virtio_pci_device_plugged; |
1490 |
} |
1491 |
|
1492 |
static const TypeInfo virtio_pci_bus_info = { |
1493 |
.name = TYPE_VIRTIO_PCI_BUS, |
1494 |
.parent = TYPE_VIRTIO_BUS, |
1495 |
.instance_size = sizeof(VirtioPCIBusState),
|
1496 |
.class_init = virtio_pci_bus_class_init, |
1497 |
}; |
1498 |
|
1499 |
static void virtio_pci_register_types(void) |
1500 |
{ |
1501 |
type_register_static(&virtio_net_info); |
1502 |
type_register_static(&virtio_serial_info); |
1503 |
type_register_static(&virtio_rng_info); |
1504 |
type_register_static(&virtio_pci_bus_info); |
1505 |
type_register_static(&virtio_pci_info); |
1506 |
#ifdef CONFIG_VIRTFS
|
1507 |
type_register_static(&virtio_9p_info); |
1508 |
#endif
|
1509 |
type_register_static(&virtio_blk_pci_info); |
1510 |
type_register_static(&virtio_scsi_pci_info); |
1511 |
type_register_static(&virtio_balloon_pci_info); |
1512 |
} |
1513 |
|
1514 |
type_init(virtio_pci_register_types) |