root / hw / virtio-pci.c @ 5e22c276
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/*
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* Virtio PCI Bindings
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*
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* Copyright IBM, Corp. 2007
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* Copyright (c) 2009 CodeSourcery
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Paul Brook <paul@codesourcery.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include <inttypes.h> |
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#include "virtio.h" |
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#include "virtio-blk.h" |
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#include "virtio-net.h" |
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#include "virtio-serial.h" |
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#include "virtio-scsi.h" |
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#include "pci/pci.h" |
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#include "qemu/error-report.h" |
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#include "pci/msi.h" |
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#include "pci/msix.h" |
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#include "loader.h" |
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#include "sysemu/kvm.h" |
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#include "sysemu/blockdev.h" |
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#include "virtio-pci.h" |
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#include "qemu/range.h" |
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/* from Linux's linux/virtio_pci.h */
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/* A 32-bit r/o bitmask of the features supported by the host */
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#define VIRTIO_PCI_HOST_FEATURES 0 |
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/* 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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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); |
297 |
} |
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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); |
308 |
} |
309 |
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if (vdev->status == 0) { |
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virtio_reset(proxy->vdev); |
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msix_unuse_all_vectors(&proxy->pci_dev); |
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} |
314 |
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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)) { |
320 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
321 |
} |
322 |
break;
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case VIRTIO_MSI_CONFIG_VECTOR:
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msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); |
325 |
/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0) |
327 |
val = VIRTIO_NO_VECTOR; |
328 |
vdev->config_vector = val; |
329 |
break;
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case VIRTIO_MSI_QUEUE_VECTOR:
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msix_vector_unuse(&proxy->pci_dev, |
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virtio_queue_vector(vdev, vdev->queue_sel)); |
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/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0) |
335 |
val = VIRTIO_NO_VECTOR; |
336 |
virtio_queue_set_vector(vdev, vdev->queue_sel, val); |
337 |
break;
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338 |
default:
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339 |
error_report("%s: unexpected address 0x%x value 0x%x",
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340 |
__func__, addr, val); |
341 |
break;
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342 |
} |
343 |
} |
344 |
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static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
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{ |
347 |
VirtIODevice *vdev = proxy->vdev; |
348 |
uint32_t ret = 0xFFFFFFFF;
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349 |
|
350 |
switch (addr) {
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351 |
case VIRTIO_PCI_HOST_FEATURES:
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ret = proxy->host_features; |
353 |
break;
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case VIRTIO_PCI_GUEST_FEATURES:
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355 |
ret = vdev->guest_features; |
356 |
break;
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357 |
case VIRTIO_PCI_QUEUE_PFN:
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358 |
ret = virtio_queue_get_addr(vdev, vdev->queue_sel) |
359 |
>> VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
360 |
break;
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361 |
case VIRTIO_PCI_QUEUE_NUM:
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362 |
ret = virtio_queue_get_num(vdev, vdev->queue_sel); |
363 |
break;
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364 |
case VIRTIO_PCI_QUEUE_SEL:
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365 |
ret = vdev->queue_sel; |
366 |
break;
|
367 |
case VIRTIO_PCI_STATUS:
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368 |
ret = vdev->status; |
369 |
break;
|
370 |
case VIRTIO_PCI_ISR:
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371 |
/* reading from the ISR also clears it. */
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372 |
ret = vdev->isr; |
373 |
vdev->isr = 0;
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374 |
qemu_set_irq(proxy->pci_dev.irq[0], 0); |
375 |
break;
|
376 |
case VIRTIO_MSI_CONFIG_VECTOR:
|
377 |
ret = vdev->config_vector; |
378 |
break;
|
379 |
case VIRTIO_MSI_QUEUE_VECTOR:
|
380 |
ret = virtio_queue_vector(vdev, vdev->queue_sel); |
381 |
break;
|
382 |
default:
|
383 |
break;
|
384 |
} |
385 |
|
386 |
return ret;
|
387 |
} |
388 |
|
389 |
static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, |
390 |
unsigned size)
|
391 |
{ |
392 |
VirtIOPCIProxy *proxy = opaque; |
393 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
394 |
uint64_t val = 0;
|
395 |
if (addr < config) {
|
396 |
return virtio_ioport_read(proxy, addr);
|
397 |
} |
398 |
addr -= config; |
399 |
|
400 |
switch (size) {
|
401 |
case 1: |
402 |
val = virtio_config_readb(proxy->vdev, addr); |
403 |
break;
|
404 |
case 2: |
405 |
val = virtio_config_readw(proxy->vdev, addr); |
406 |
if (virtio_is_big_endian()) {
|
407 |
val = bswap16(val); |
408 |
} |
409 |
break;
|
410 |
case 4: |
411 |
val = virtio_config_readl(proxy->vdev, addr); |
412 |
if (virtio_is_big_endian()) {
|
413 |
val = bswap32(val); |
414 |
} |
415 |
break;
|
416 |
} |
417 |
return val;
|
418 |
} |
419 |
|
420 |
static void virtio_pci_config_write(void *opaque, hwaddr addr, |
421 |
uint64_t val, unsigned size)
|
422 |
{ |
423 |
VirtIOPCIProxy *proxy = opaque; |
424 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
425 |
if (addr < config) {
|
426 |
virtio_ioport_write(proxy, addr, val); |
427 |
return;
|
428 |
} |
429 |
addr -= config; |
430 |
/*
|
431 |
* Virtio-PCI is odd. Ioports are LE but config space is target native
|
432 |
* endian.
|
433 |
*/
|
434 |
switch (size) {
|
435 |
case 1: |
436 |
virtio_config_writeb(proxy->vdev, addr, val); |
437 |
break;
|
438 |
case 2: |
439 |
if (virtio_is_big_endian()) {
|
440 |
val = bswap16(val); |
441 |
} |
442 |
virtio_config_writew(proxy->vdev, addr, val); |
443 |
break;
|
444 |
case 4: |
445 |
if (virtio_is_big_endian()) {
|
446 |
val = bswap32(val); |
447 |
} |
448 |
virtio_config_writel(proxy->vdev, addr, val); |
449 |
break;
|
450 |
} |
451 |
} |
452 |
|
453 |
static const MemoryRegionOps virtio_pci_config_ops = { |
454 |
.read = virtio_pci_config_read, |
455 |
.write = virtio_pci_config_write, |
456 |
.impl = { |
457 |
.min_access_size = 1,
|
458 |
.max_access_size = 4,
|
459 |
}, |
460 |
.endianness = DEVICE_LITTLE_ENDIAN, |
461 |
}; |
462 |
|
463 |
static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, |
464 |
uint32_t val, int len)
|
465 |
{ |
466 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
467 |
|
468 |
pci_default_write_config(pci_dev, address, val, len); |
469 |
|
470 |
if (range_covers_byte(address, len, PCI_COMMAND) &&
|
471 |
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && |
472 |
!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { |
473 |
virtio_pci_stop_ioeventfd(proxy); |
474 |
virtio_set_status(proxy->vdev, |
475 |
proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); |
476 |
} |
477 |
} |
478 |
|
479 |
static unsigned virtio_pci_get_features(DeviceState *d) |
480 |
{ |
481 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
482 |
return proxy->host_features;
|
483 |
} |
484 |
|
485 |
static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, |
486 |
unsigned int queue_no, |
487 |
unsigned int vector, |
488 |
MSIMessage msg) |
489 |
{ |
490 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
491 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
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 |
|
504 |
ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq); |
505 |
if (ret < 0) { |
506 |
if (--irqfd->users == 0) { |
507 |
kvm_irqchip_release_virq(kvm_state, irqfd->virq); |
508 |
} |
509 |
return ret;
|
510 |
} |
511 |
return 0; |
512 |
} |
513 |
|
514 |
static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, |
515 |
unsigned int queue_no, |
516 |
unsigned int vector) |
517 |
{ |
518 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
519 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
520 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
521 |
int ret;
|
522 |
|
523 |
ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); |
524 |
assert(ret == 0);
|
525 |
|
526 |
if (--irqfd->users == 0) { |
527 |
kvm_irqchip_release_virq(kvm_state, irqfd->virq); |
528 |
} |
529 |
} |
530 |
|
531 |
static int kvm_virtio_pci_vector_use(PCIDevice *dev, unsigned vector, |
532 |
MSIMessage msg) |
533 |
{ |
534 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
535 |
VirtIODevice *vdev = proxy->vdev; |
536 |
int ret, queue_no;
|
537 |
|
538 |
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { |
539 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
540 |
break;
|
541 |
} |
542 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
543 |
continue;
|
544 |
} |
545 |
ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); |
546 |
if (ret < 0) { |
547 |
goto undo;
|
548 |
} |
549 |
} |
550 |
return 0; |
551 |
|
552 |
undo:
|
553 |
while (--queue_no >= 0) { |
554 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
555 |
continue;
|
556 |
} |
557 |
kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector); |
558 |
} |
559 |
return ret;
|
560 |
} |
561 |
|
562 |
static void kvm_virtio_pci_vector_release(PCIDevice *dev, unsigned vector) |
563 |
{ |
564 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
565 |
VirtIODevice *vdev = proxy->vdev; |
566 |
int queue_no;
|
567 |
|
568 |
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { |
569 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
570 |
break;
|
571 |
} |
572 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
573 |
continue;
|
574 |
} |
575 |
kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector); |
576 |
} |
577 |
} |
578 |
|
579 |
static void kvm_virtio_pci_vector_poll(PCIDevice *dev, |
580 |
unsigned int vector_start, |
581 |
unsigned int vector_end) |
582 |
{ |
583 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
584 |
VirtIODevice *vdev = proxy->vdev; |
585 |
int queue_no;
|
586 |
unsigned int vector; |
587 |
EventNotifier *notifier; |
588 |
VirtQueue *vq; |
589 |
|
590 |
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { |
591 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
592 |
break;
|
593 |
} |
594 |
vector = virtio_queue_vector(vdev, queue_no); |
595 |
if (vector < vector_start || vector >= vector_end ||
|
596 |
!msix_is_masked(dev, vector)) { |
597 |
continue;
|
598 |
} |
599 |
vq = virtio_get_queue(vdev, queue_no); |
600 |
notifier = virtio_queue_get_guest_notifier(vq); |
601 |
if (event_notifier_test_and_clear(notifier)) {
|
602 |
msix_set_pending(dev, vector); |
603 |
} |
604 |
} |
605 |
} |
606 |
|
607 |
static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, |
608 |
bool with_irqfd)
|
609 |
{ |
610 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
611 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
612 |
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); |
613 |
|
614 |
if (assign) {
|
615 |
int r = event_notifier_init(notifier, 0); |
616 |
if (r < 0) { |
617 |
return r;
|
618 |
} |
619 |
virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
|
620 |
} else {
|
621 |
virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
|
622 |
event_notifier_cleanup(notifier); |
623 |
} |
624 |
|
625 |
return 0; |
626 |
} |
627 |
|
628 |
static bool virtio_pci_query_guest_notifiers(DeviceState *d) |
629 |
{ |
630 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
631 |
return msix_enabled(&proxy->pci_dev);
|
632 |
} |
633 |
|
634 |
static int virtio_pci_set_guest_notifiers(DeviceState *d, bool assign) |
635 |
{ |
636 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
637 |
VirtIODevice *vdev = proxy->vdev; |
638 |
int r, n;
|
639 |
bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
|
640 |
kvm_msi_via_irqfd_enabled(); |
641 |
|
642 |
/* Must unset vector notifier while guest notifier is still assigned */
|
643 |
if (proxy->vector_irqfd && !assign) {
|
644 |
msix_unset_vector_notifiers(&proxy->pci_dev); |
645 |
g_free(proxy->vector_irqfd); |
646 |
proxy->vector_irqfd = NULL;
|
647 |
} |
648 |
|
649 |
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
650 |
if (!virtio_queue_get_num(vdev, n)) {
|
651 |
break;
|
652 |
} |
653 |
|
654 |
r = virtio_pci_set_guest_notifier(d, n, assign, |
655 |
kvm_msi_via_irqfd_enabled()); |
656 |
if (r < 0) { |
657 |
goto assign_error;
|
658 |
} |
659 |
} |
660 |
|
661 |
/* Must set vector notifier after guest notifier has been assigned */
|
662 |
if (with_irqfd && assign) {
|
663 |
proxy->vector_irqfd = |
664 |
g_malloc0(sizeof(*proxy->vector_irqfd) *
|
665 |
msix_nr_vectors_allocated(&proxy->pci_dev)); |
666 |
r = msix_set_vector_notifiers(&proxy->pci_dev, |
667 |
kvm_virtio_pci_vector_use, |
668 |
kvm_virtio_pci_vector_release, |
669 |
kvm_virtio_pci_vector_poll); |
670 |
if (r < 0) { |
671 |
goto assign_error;
|
672 |
} |
673 |
} |
674 |
|
675 |
return 0; |
676 |
|
677 |
assign_error:
|
678 |
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
|
679 |
assert(assign); |
680 |
while (--n >= 0) { |
681 |
virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); |
682 |
} |
683 |
return r;
|
684 |
} |
685 |
|
686 |
static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) |
687 |
{ |
688 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
689 |
|
690 |
/* Stop using ioeventfd for virtqueue kick if the device starts using host
|
691 |
* notifiers. This makes it easy to avoid stepping on each others' toes.
|
692 |
*/
|
693 |
proxy->ioeventfd_disabled = assign; |
694 |
if (assign) {
|
695 |
virtio_pci_stop_ioeventfd(proxy); |
696 |
} |
697 |
/* We don't need to start here: it's not needed because backend
|
698 |
* currently only stops on status change away from ok,
|
699 |
* reset, vmstop and such. If we do add code to start here,
|
700 |
* need to check vmstate, device state etc. */
|
701 |
return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); |
702 |
} |
703 |
|
704 |
static void virtio_pci_vmstate_change(DeviceState *d, bool running) |
705 |
{ |
706 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
707 |
|
708 |
if (running) {
|
709 |
/* Try to find out if the guest has bus master disabled, but is
|
710 |
in ready state. Then we have a buggy guest OS. */
|
711 |
if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
712 |
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
713 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
714 |
} |
715 |
virtio_pci_start_ioeventfd(proxy); |
716 |
} else {
|
717 |
virtio_pci_stop_ioeventfd(proxy); |
718 |
} |
719 |
} |
720 |
|
721 |
static const VirtIOBindings virtio_pci_bindings = { |
722 |
.notify = virtio_pci_notify, |
723 |
.save_config = virtio_pci_save_config, |
724 |
.load_config = virtio_pci_load_config, |
725 |
.save_queue = virtio_pci_save_queue, |
726 |
.load_queue = virtio_pci_load_queue, |
727 |
.get_features = virtio_pci_get_features, |
728 |
.query_guest_notifiers = virtio_pci_query_guest_notifiers, |
729 |
.set_host_notifier = virtio_pci_set_host_notifier, |
730 |
.set_guest_notifiers = virtio_pci_set_guest_notifiers, |
731 |
.vmstate_change = virtio_pci_vmstate_change, |
732 |
}; |
733 |
|
734 |
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
|
735 |
{ |
736 |
uint8_t *config; |
737 |
uint32_t size; |
738 |
|
739 |
proxy->vdev = vdev; |
740 |
|
741 |
config = proxy->pci_dev.config; |
742 |
|
743 |
if (proxy->class_code) {
|
744 |
pci_config_set_class(config, proxy->class_code); |
745 |
} |
746 |
pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, |
747 |
pci_get_word(config + PCI_VENDOR_ID)); |
748 |
pci_set_word(config + PCI_SUBSYSTEM_ID, vdev->device_id); |
749 |
config[PCI_INTERRUPT_PIN] = 1;
|
750 |
|
751 |
if (vdev->nvectors &&
|
752 |
msix_init_exclusive_bar(&proxy->pci_dev, vdev->nvectors, 1)) {
|
753 |
vdev->nvectors = 0;
|
754 |
} |
755 |
|
756 |
proxy->pci_dev.config_write = virtio_write_config; |
757 |
|
758 |
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len; |
759 |
if (size & (size-1)) |
760 |
size = 1 << qemu_fls(size);
|
761 |
|
762 |
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, |
763 |
"virtio-pci", size);
|
764 |
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
|
765 |
&proxy->bar); |
766 |
|
767 |
if (!kvm_has_many_ioeventfds()) {
|
768 |
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; |
769 |
} |
770 |
|
771 |
virtio_bind_device(vdev, &virtio_pci_bindings, DEVICE(proxy)); |
772 |
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
|
773 |
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
|
774 |
proxy->host_features = vdev->get_features(vdev, proxy->host_features); |
775 |
} |
776 |
|
777 |
static int virtio_blk_init_pci(PCIDevice *pci_dev) |
778 |
{ |
779 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
780 |
VirtIODevice *vdev; |
781 |
|
782 |
if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
|
783 |
proxy->class_code != PCI_CLASS_STORAGE_OTHER) |
784 |
proxy->class_code = PCI_CLASS_STORAGE_SCSI; |
785 |
|
786 |
vdev = virtio_blk_init(&pci_dev->qdev, &proxy->blk); |
787 |
if (!vdev) {
|
788 |
return -1; |
789 |
} |
790 |
vdev->nvectors = proxy->nvectors; |
791 |
virtio_init_pci(proxy, vdev); |
792 |
/* make the actual value visible */
|
793 |
proxy->nvectors = vdev->nvectors; |
794 |
return 0; |
795 |
} |
796 |
|
797 |
static void virtio_exit_pci(PCIDevice *pci_dev) |
798 |
{ |
799 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
800 |
|
801 |
memory_region_destroy(&proxy->bar); |
802 |
msix_uninit_exclusive_bar(pci_dev); |
803 |
} |
804 |
|
805 |
static void virtio_blk_exit_pci(PCIDevice *pci_dev) |
806 |
{ |
807 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
808 |
|
809 |
virtio_pci_stop_ioeventfd(proxy); |
810 |
virtio_blk_exit(proxy->vdev); |
811 |
virtio_exit_pci(pci_dev); |
812 |
} |
813 |
|
814 |
static int virtio_serial_init_pci(PCIDevice *pci_dev) |
815 |
{ |
816 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
817 |
VirtIODevice *vdev; |
818 |
|
819 |
if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
|
820 |
proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
|
821 |
proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
|
822 |
proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER; |
823 |
|
824 |
vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial); |
825 |
if (!vdev) {
|
826 |
return -1; |
827 |
} |
828 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
829 |
? proxy->serial.max_virtserial_ports + 1
|
830 |
: proxy->nvectors; |
831 |
virtio_init_pci(proxy, vdev); |
832 |
proxy->nvectors = vdev->nvectors; |
833 |
return 0; |
834 |
} |
835 |
|
836 |
static void virtio_serial_exit_pci(PCIDevice *pci_dev) |
837 |
{ |
838 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
839 |
|
840 |
virtio_pci_stop_ioeventfd(proxy); |
841 |
virtio_serial_exit(proxy->vdev); |
842 |
virtio_exit_pci(pci_dev); |
843 |
} |
844 |
|
845 |
static int virtio_net_init_pci(PCIDevice *pci_dev) |
846 |
{ |
847 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
848 |
VirtIODevice *vdev; |
849 |
|
850 |
vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net); |
851 |
|
852 |
vdev->nvectors = proxy->nvectors; |
853 |
virtio_init_pci(proxy, vdev); |
854 |
|
855 |
/* make the actual value visible */
|
856 |
proxy->nvectors = vdev->nvectors; |
857 |
return 0; |
858 |
} |
859 |
|
860 |
static void virtio_net_exit_pci(PCIDevice *pci_dev) |
861 |
{ |
862 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
863 |
|
864 |
virtio_pci_stop_ioeventfd(proxy); |
865 |
virtio_net_exit(proxy->vdev); |
866 |
virtio_exit_pci(pci_dev); |
867 |
} |
868 |
|
869 |
static int virtio_balloon_init_pci(PCIDevice *pci_dev) |
870 |
{ |
871 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
872 |
VirtIODevice *vdev; |
873 |
|
874 |
if (proxy->class_code != PCI_CLASS_OTHERS &&
|
875 |
proxy->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
|
876 |
proxy->class_code = PCI_CLASS_OTHERS; |
877 |
} |
878 |
|
879 |
vdev = virtio_balloon_init(&pci_dev->qdev); |
880 |
if (!vdev) {
|
881 |
return -1; |
882 |
} |
883 |
virtio_init_pci(proxy, vdev); |
884 |
return 0; |
885 |
} |
886 |
|
887 |
static void virtio_balloon_exit_pci(PCIDevice *pci_dev) |
888 |
{ |
889 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
890 |
|
891 |
virtio_pci_stop_ioeventfd(proxy); |
892 |
virtio_balloon_exit(proxy->vdev); |
893 |
virtio_exit_pci(pci_dev); |
894 |
} |
895 |
|
896 |
static int virtio_rng_init_pci(PCIDevice *pci_dev) |
897 |
{ |
898 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
899 |
VirtIODevice *vdev; |
900 |
|
901 |
if (proxy->rng.rng == NULL) { |
902 |
proxy->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM)); |
903 |
|
904 |
object_property_add_child(OBJECT(pci_dev), |
905 |
"default-backend",
|
906 |
OBJECT(proxy->rng.default_backend), |
907 |
NULL);
|
908 |
|
909 |
object_property_set_link(OBJECT(pci_dev), |
910 |
OBJECT(proxy->rng.default_backend), |
911 |
"rng", NULL); |
912 |
} |
913 |
|
914 |
vdev = virtio_rng_init(&pci_dev->qdev, &proxy->rng); |
915 |
if (!vdev) {
|
916 |
return -1; |
917 |
} |
918 |
virtio_init_pci(proxy, vdev); |
919 |
return 0; |
920 |
} |
921 |
|
922 |
static void virtio_rng_exit_pci(PCIDevice *pci_dev) |
923 |
{ |
924 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
925 |
|
926 |
virtio_pci_stop_ioeventfd(proxy); |
927 |
virtio_rng_exit(proxy->vdev); |
928 |
virtio_exit_pci(pci_dev); |
929 |
} |
930 |
|
931 |
static Property virtio_blk_properties[] = {
|
932 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
933 |
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, blk.conf), |
934 |
DEFINE_BLOCK_CHS_PROPERTIES(VirtIOPCIProxy, blk.conf), |
935 |
DEFINE_PROP_STRING("serial", VirtIOPCIProxy, blk.serial),
|
936 |
#ifdef __linux__
|
937 |
DEFINE_PROP_BIT("scsi", VirtIOPCIProxy, blk.scsi, 0, true), |
938 |
#endif
|
939 |
DEFINE_PROP_BIT("config-wce", VirtIOPCIProxy, blk.config_wce, 0, true), |
940 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
941 |
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
|
942 |
DEFINE_PROP_BIT("x-data-plane", VirtIOPCIProxy, blk.data_plane, 0, false), |
943 |
#endif
|
944 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
945 |
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), |
946 |
DEFINE_PROP_END_OF_LIST(), |
947 |
}; |
948 |
|
949 |
static void virtio_blk_class_init(ObjectClass *klass, void *data) |
950 |
{ |
951 |
DeviceClass *dc = DEVICE_CLASS(klass); |
952 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
953 |
|
954 |
k->init = virtio_blk_init_pci; |
955 |
k->exit = virtio_blk_exit_pci; |
956 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
957 |
k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; |
958 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
959 |
k->class_id = PCI_CLASS_STORAGE_SCSI; |
960 |
dc->reset = virtio_pci_reset; |
961 |
dc->props = virtio_blk_properties; |
962 |
} |
963 |
|
964 |
static TypeInfo virtio_blk_info = {
|
965 |
.name = "virtio-blk-pci",
|
966 |
.parent = TYPE_PCI_DEVICE, |
967 |
.instance_size = sizeof(VirtIOPCIProxy),
|
968 |
.class_init = virtio_blk_class_init, |
969 |
}; |
970 |
|
971 |
static Property virtio_net_properties[] = {
|
972 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), |
973 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), |
974 |
DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), |
975 |
DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic), |
976 |
DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy, net.txtimer, TX_TIMER_INTERVAL),
|
977 |
DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy, net.txburst, TX_BURST),
|
978 |
DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
|
979 |
DEFINE_PROP_END_OF_LIST(), |
980 |
}; |
981 |
|
982 |
static void virtio_net_class_init(ObjectClass *klass, void *data) |
983 |
{ |
984 |
DeviceClass *dc = DEVICE_CLASS(klass); |
985 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
986 |
|
987 |
k->init = virtio_net_init_pci; |
988 |
k->exit = virtio_net_exit_pci; |
989 |
k->romfile = "pxe-virtio.rom";
|
990 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
991 |
k->device_id = PCI_DEVICE_ID_VIRTIO_NET; |
992 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
993 |
k->class_id = PCI_CLASS_NETWORK_ETHERNET; |
994 |
dc->reset = virtio_pci_reset; |
995 |
dc->props = virtio_net_properties; |
996 |
} |
997 |
|
998 |
static TypeInfo virtio_net_info = {
|
999 |
.name = "virtio-net-pci",
|
1000 |
.parent = TYPE_PCI_DEVICE, |
1001 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1002 |
.class_init = virtio_net_class_init, |
1003 |
}; |
1004 |
|
1005 |
static Property virtio_serial_properties[] = {
|
1006 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
1007 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
1008 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
1009 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1010 |
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31), |
1011 |
DEFINE_PROP_END_OF_LIST(), |
1012 |
}; |
1013 |
|
1014 |
static void virtio_serial_class_init(ObjectClass *klass, void *data) |
1015 |
{ |
1016 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1017 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1018 |
|
1019 |
k->init = virtio_serial_init_pci; |
1020 |
k->exit = virtio_serial_exit_pci; |
1021 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1022 |
k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; |
1023 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1024 |
k->class_id = PCI_CLASS_COMMUNICATION_OTHER; |
1025 |
dc->reset = virtio_pci_reset; |
1026 |
dc->props = virtio_serial_properties; |
1027 |
} |
1028 |
|
1029 |
static TypeInfo virtio_serial_info = {
|
1030 |
.name = "virtio-serial-pci",
|
1031 |
.parent = TYPE_PCI_DEVICE, |
1032 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1033 |
.class_init = virtio_serial_class_init, |
1034 |
}; |
1035 |
|
1036 |
static Property virtio_balloon_properties[] = {
|
1037 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1038 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
1039 |
DEFINE_PROP_END_OF_LIST(), |
1040 |
}; |
1041 |
|
1042 |
static void virtio_balloon_class_init(ObjectClass *klass, void *data) |
1043 |
{ |
1044 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1045 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1046 |
|
1047 |
k->init = virtio_balloon_init_pci; |
1048 |
k->exit = virtio_balloon_exit_pci; |
1049 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1050 |
k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; |
1051 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1052 |
k->class_id = PCI_CLASS_OTHERS; |
1053 |
dc->reset = virtio_pci_reset; |
1054 |
dc->props = virtio_balloon_properties; |
1055 |
} |
1056 |
|
1057 |
static TypeInfo virtio_balloon_info = {
|
1058 |
.name = "virtio-balloon-pci",
|
1059 |
.parent = TYPE_PCI_DEVICE, |
1060 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1061 |
.class_init = virtio_balloon_class_init, |
1062 |
}; |
1063 |
|
1064 |
static void virtio_rng_initfn(Object *obj) |
1065 |
{ |
1066 |
PCIDevice *pci_dev = PCI_DEVICE(obj); |
1067 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1068 |
|
1069 |
object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
|
1070 |
(Object **)&proxy->rng.rng, NULL);
|
1071 |
} |
1072 |
|
1073 |
static Property virtio_rng_properties[] = {
|
1074 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1075 |
/* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If
|
1076 |
you have an entropy source capable of generating more entropy than this
|
1077 |
and you can pass it through via virtio-rng, then hats off to you. Until
|
1078 |
then, this is unlimited for all practical purposes.
|
1079 |
*/
|
1080 |
DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy, rng.max_bytes, INT64_MAX),
|
1081 |
DEFINE_PROP_UINT32("period", VirtIOPCIProxy, rng.period_ms, 1 << 16), |
1082 |
DEFINE_PROP_END_OF_LIST(), |
1083 |
}; |
1084 |
|
1085 |
static void virtio_rng_class_init(ObjectClass *klass, void *data) |
1086 |
{ |
1087 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1088 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1089 |
|
1090 |
k->init = virtio_rng_init_pci; |
1091 |
k->exit = virtio_rng_exit_pci; |
1092 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1093 |
k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; |
1094 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1095 |
k->class_id = PCI_CLASS_OTHERS; |
1096 |
dc->reset = virtio_pci_reset; |
1097 |
dc->props = virtio_rng_properties; |
1098 |
} |
1099 |
|
1100 |
static TypeInfo virtio_rng_info = {
|
1101 |
.name = "virtio-rng-pci",
|
1102 |
.parent = TYPE_PCI_DEVICE, |
1103 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1104 |
.instance_init = virtio_rng_initfn, |
1105 |
.class_init = virtio_rng_class_init, |
1106 |
}; |
1107 |
|
1108 |
static int virtio_scsi_init_pci(PCIDevice *pci_dev) |
1109 |
{ |
1110 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1111 |
VirtIODevice *vdev; |
1112 |
|
1113 |
vdev = virtio_scsi_init(&pci_dev->qdev, &proxy->scsi); |
1114 |
if (!vdev) {
|
1115 |
return -EINVAL;
|
1116 |
} |
1117 |
|
1118 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
1119 |
? proxy->scsi.num_queues + 3
|
1120 |
: proxy->nvectors; |
1121 |
virtio_init_pci(proxy, vdev); |
1122 |
|
1123 |
/* make the actual value visible */
|
1124 |
proxy->nvectors = vdev->nvectors; |
1125 |
return 0; |
1126 |
} |
1127 |
|
1128 |
static void virtio_scsi_exit_pci(PCIDevice *pci_dev) |
1129 |
{ |
1130 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1131 |
|
1132 |
virtio_scsi_exit(proxy->vdev); |
1133 |
virtio_exit_pci(pci_dev); |
1134 |
} |
1135 |
|
1136 |
static Property virtio_scsi_properties[] = {
|
1137 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
1138 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
1139 |
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOPCIProxy, host_features, scsi), |
1140 |
DEFINE_PROP_END_OF_LIST(), |
1141 |
}; |
1142 |
|
1143 |
static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
1144 |
{ |
1145 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1146 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1147 |
|
1148 |
k->init = virtio_scsi_init_pci; |
1149 |
k->exit = virtio_scsi_exit_pci; |
1150 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1151 |
k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; |
1152 |
k->revision = 0x00;
|
1153 |
k->class_id = PCI_CLASS_STORAGE_SCSI; |
1154 |
dc->reset = virtio_pci_reset; |
1155 |
dc->props = virtio_scsi_properties; |
1156 |
} |
1157 |
|
1158 |
static TypeInfo virtio_scsi_info = {
|
1159 |
.name = "virtio-scsi-pci",
|
1160 |
.parent = TYPE_PCI_DEVICE, |
1161 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1162 |
.class_init = virtio_scsi_class_init, |
1163 |
}; |
1164 |
|
1165 |
static void virtio_pci_register_types(void) |
1166 |
{ |
1167 |
type_register_static(&virtio_blk_info); |
1168 |
type_register_static(&virtio_net_info); |
1169 |
type_register_static(&virtio_serial_info); |
1170 |
type_register_static(&virtio_balloon_info); |
1171 |
type_register_static(&virtio_scsi_info); |
1172 |
type_register_static(&virtio_rng_info); |
1173 |
} |
1174 |
|
1175 |
type_init(virtio_pci_register_types) |