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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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/* 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); |
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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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} |
300 |
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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); |
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} |
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if (vdev->status == 0) { |
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virtio_reset(proxy->vdev); |
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msix_unuse_all_vectors(&proxy->pci_dev); |
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} |
311 |
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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)) { |
317 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
318 |
} |
319 |
break;
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case VIRTIO_MSI_CONFIG_VECTOR:
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msix_vector_unuse(&proxy->pci_dev, vdev->config_vector); |
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/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0) |
324 |
val = VIRTIO_NO_VECTOR; |
325 |
vdev->config_vector = val; |
326 |
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)); |
330 |
/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0) |
332 |
val = VIRTIO_NO_VECTOR; |
333 |
virtio_queue_set_vector(vdev, vdev->queue_sel, val); |
334 |
break;
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default:
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336 |
error_report("%s: unexpected address 0x%x value 0x%x",
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337 |
__func__, addr, val); |
338 |
break;
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339 |
} |
340 |
} |
341 |
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342 |
static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
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{ |
344 |
VirtIODevice *vdev = proxy->vdev; |
345 |
uint32_t ret = 0xFFFFFFFF;
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346 |
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347 |
switch (addr) {
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case VIRTIO_PCI_HOST_FEATURES:
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ret = proxy->host_features; |
350 |
break;
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351 |
case VIRTIO_PCI_GUEST_FEATURES:
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ret = vdev->guest_features; |
353 |
break;
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case VIRTIO_PCI_QUEUE_PFN:
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355 |
ret = virtio_queue_get_addr(vdev, vdev->queue_sel) |
356 |
>> VIRTIO_PCI_QUEUE_ADDR_SHIFT; |
357 |
break;
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358 |
case VIRTIO_PCI_QUEUE_NUM:
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359 |
ret = virtio_queue_get_num(vdev, vdev->queue_sel); |
360 |
break;
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361 |
case VIRTIO_PCI_QUEUE_SEL:
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362 |
ret = vdev->queue_sel; |
363 |
break;
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364 |
case VIRTIO_PCI_STATUS:
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365 |
ret = vdev->status; |
366 |
break;
|
367 |
case VIRTIO_PCI_ISR:
|
368 |
/* reading from the ISR also clears it. */
|
369 |
ret = vdev->isr; |
370 |
vdev->isr = 0;
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371 |
qemu_set_irq(proxy->pci_dev.irq[0], 0); |
372 |
break;
|
373 |
case VIRTIO_MSI_CONFIG_VECTOR:
|
374 |
ret = vdev->config_vector; |
375 |
break;
|
376 |
case VIRTIO_MSI_QUEUE_VECTOR:
|
377 |
ret = virtio_queue_vector(vdev, vdev->queue_sel); |
378 |
break;
|
379 |
default:
|
380 |
break;
|
381 |
} |
382 |
|
383 |
return ret;
|
384 |
} |
385 |
|
386 |
static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, |
387 |
unsigned size)
|
388 |
{ |
389 |
VirtIOPCIProxy *proxy = opaque; |
390 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
391 |
uint64_t val = 0;
|
392 |
if (addr < config) {
|
393 |
return virtio_ioport_read(proxy, addr);
|
394 |
} |
395 |
addr -= config; |
396 |
|
397 |
switch (size) {
|
398 |
case 1: |
399 |
val = virtio_config_readb(proxy->vdev, addr); |
400 |
break;
|
401 |
case 2: |
402 |
val = virtio_config_readw(proxy->vdev, addr); |
403 |
break;
|
404 |
case 4: |
405 |
val = virtio_config_readl(proxy->vdev, addr); |
406 |
break;
|
407 |
} |
408 |
return val;
|
409 |
} |
410 |
|
411 |
static void virtio_pci_config_write(void *opaque, hwaddr addr, |
412 |
uint64_t val, unsigned size)
|
413 |
{ |
414 |
VirtIOPCIProxy *proxy = opaque; |
415 |
uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); |
416 |
if (addr < config) {
|
417 |
virtio_ioport_write(proxy, addr, val); |
418 |
return;
|
419 |
} |
420 |
addr -= config; |
421 |
/*
|
422 |
* Virtio-PCI is odd. Ioports are LE but config space is target native
|
423 |
* endian.
|
424 |
*/
|
425 |
switch (size) {
|
426 |
case 1: |
427 |
virtio_config_writeb(proxy->vdev, addr, val); |
428 |
break;
|
429 |
case 2: |
430 |
virtio_config_writew(proxy->vdev, addr, val); |
431 |
break;
|
432 |
case 4: |
433 |
virtio_config_writel(proxy->vdev, addr, val); |
434 |
break;
|
435 |
} |
436 |
} |
437 |
|
438 |
static const MemoryRegionOps virtio_pci_config_ops = { |
439 |
.read = virtio_pci_config_read, |
440 |
.write = virtio_pci_config_write, |
441 |
.impl = { |
442 |
.min_access_size = 1,
|
443 |
.max_access_size = 4,
|
444 |
}, |
445 |
.endianness = DEVICE_NATIVE_ENDIAN, |
446 |
}; |
447 |
|
448 |
static void virtio_write_config(PCIDevice *pci_dev, uint32_t address, |
449 |
uint32_t val, int len)
|
450 |
{ |
451 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
452 |
|
453 |
pci_default_write_config(pci_dev, address, val, len); |
454 |
|
455 |
if (range_covers_byte(address, len, PCI_COMMAND) &&
|
456 |
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) && |
457 |
!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) { |
458 |
virtio_pci_stop_ioeventfd(proxy); |
459 |
virtio_set_status(proxy->vdev, |
460 |
proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK); |
461 |
} |
462 |
} |
463 |
|
464 |
static unsigned virtio_pci_get_features(DeviceState *d) |
465 |
{ |
466 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
467 |
return proxy->host_features;
|
468 |
} |
469 |
|
470 |
static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy, |
471 |
unsigned int queue_no, |
472 |
unsigned int vector, |
473 |
MSIMessage msg) |
474 |
{ |
475 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
476 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
477 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
478 |
int ret;
|
479 |
|
480 |
if (irqfd->users == 0) { |
481 |
ret = kvm_irqchip_add_msi_route(kvm_state, msg); |
482 |
if (ret < 0) { |
483 |
return ret;
|
484 |
} |
485 |
irqfd->virq = ret; |
486 |
} |
487 |
irqfd->users++; |
488 |
|
489 |
ret = kvm_irqchip_add_irqfd_notifier(kvm_state, n, irqfd->virq); |
490 |
if (ret < 0) { |
491 |
if (--irqfd->users == 0) { |
492 |
kvm_irqchip_release_virq(kvm_state, irqfd->virq); |
493 |
} |
494 |
return ret;
|
495 |
} |
496 |
return 0; |
497 |
} |
498 |
|
499 |
static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy, |
500 |
unsigned int queue_no, |
501 |
unsigned int vector) |
502 |
{ |
503 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no); |
504 |
EventNotifier *n = virtio_queue_get_guest_notifier(vq); |
505 |
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector]; |
506 |
int ret;
|
507 |
|
508 |
ret = kvm_irqchip_remove_irqfd_notifier(kvm_state, n, irqfd->virq); |
509 |
assert(ret == 0);
|
510 |
|
511 |
if (--irqfd->users == 0) { |
512 |
kvm_irqchip_release_virq(kvm_state, irqfd->virq); |
513 |
} |
514 |
} |
515 |
|
516 |
static int kvm_virtio_pci_vector_use(PCIDevice *dev, unsigned vector, |
517 |
MSIMessage msg) |
518 |
{ |
519 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
520 |
VirtIODevice *vdev = proxy->vdev; |
521 |
int ret, queue_no;
|
522 |
|
523 |
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { |
524 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
525 |
break;
|
526 |
} |
527 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
528 |
continue;
|
529 |
} |
530 |
ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg); |
531 |
if (ret < 0) { |
532 |
goto undo;
|
533 |
} |
534 |
} |
535 |
return 0; |
536 |
|
537 |
undo:
|
538 |
while (--queue_no >= 0) { |
539 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
540 |
continue;
|
541 |
} |
542 |
kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector); |
543 |
} |
544 |
return ret;
|
545 |
} |
546 |
|
547 |
static void kvm_virtio_pci_vector_release(PCIDevice *dev, unsigned vector) |
548 |
{ |
549 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
550 |
VirtIODevice *vdev = proxy->vdev; |
551 |
int queue_no;
|
552 |
|
553 |
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { |
554 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
555 |
break;
|
556 |
} |
557 |
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
558 |
continue;
|
559 |
} |
560 |
kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector); |
561 |
} |
562 |
} |
563 |
|
564 |
static void kvm_virtio_pci_vector_poll(PCIDevice *dev, |
565 |
unsigned int vector_start, |
566 |
unsigned int vector_end) |
567 |
{ |
568 |
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev); |
569 |
VirtIODevice *vdev = proxy->vdev; |
570 |
int queue_no;
|
571 |
unsigned int vector; |
572 |
EventNotifier *notifier; |
573 |
VirtQueue *vq; |
574 |
|
575 |
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) { |
576 |
if (!virtio_queue_get_num(vdev, queue_no)) {
|
577 |
break;
|
578 |
} |
579 |
vector = virtio_queue_vector(vdev, queue_no); |
580 |
if (vector < vector_start || vector >= vector_end ||
|
581 |
!msix_is_masked(dev, vector)) { |
582 |
continue;
|
583 |
} |
584 |
vq = virtio_get_queue(vdev, queue_no); |
585 |
notifier = virtio_queue_get_guest_notifier(vq); |
586 |
if (event_notifier_test_and_clear(notifier)) {
|
587 |
msix_set_pending(dev, vector); |
588 |
} |
589 |
} |
590 |
} |
591 |
|
592 |
static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign, |
593 |
bool with_irqfd)
|
594 |
{ |
595 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
596 |
VirtQueue *vq = virtio_get_queue(proxy->vdev, n); |
597 |
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq); |
598 |
|
599 |
if (assign) {
|
600 |
int r = event_notifier_init(notifier, 0); |
601 |
if (r < 0) { |
602 |
return r;
|
603 |
} |
604 |
virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
|
605 |
} else {
|
606 |
virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
|
607 |
event_notifier_cleanup(notifier); |
608 |
} |
609 |
|
610 |
return 0; |
611 |
} |
612 |
|
613 |
static bool virtio_pci_query_guest_notifiers(DeviceState *d) |
614 |
{ |
615 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
616 |
return msix_enabled(&proxy->pci_dev);
|
617 |
} |
618 |
|
619 |
static int virtio_pci_set_guest_notifiers(DeviceState *d, bool assign) |
620 |
{ |
621 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
622 |
VirtIODevice *vdev = proxy->vdev; |
623 |
int r, n;
|
624 |
bool with_irqfd = msix_enabled(&proxy->pci_dev) &&
|
625 |
kvm_msi_via_irqfd_enabled(); |
626 |
|
627 |
/* Must unset vector notifier while guest notifier is still assigned */
|
628 |
if (proxy->vector_irqfd && !assign) {
|
629 |
msix_unset_vector_notifiers(&proxy->pci_dev); |
630 |
g_free(proxy->vector_irqfd); |
631 |
proxy->vector_irqfd = NULL;
|
632 |
} |
633 |
|
634 |
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) { |
635 |
if (!virtio_queue_get_num(vdev, n)) {
|
636 |
break;
|
637 |
} |
638 |
|
639 |
r = virtio_pci_set_guest_notifier(d, n, assign, |
640 |
kvm_msi_via_irqfd_enabled()); |
641 |
if (r < 0) { |
642 |
goto assign_error;
|
643 |
} |
644 |
} |
645 |
|
646 |
/* Must set vector notifier after guest notifier has been assigned */
|
647 |
if (with_irqfd && assign) {
|
648 |
proxy->vector_irqfd = |
649 |
g_malloc0(sizeof(*proxy->vector_irqfd) *
|
650 |
msix_nr_vectors_allocated(&proxy->pci_dev)); |
651 |
r = msix_set_vector_notifiers(&proxy->pci_dev, |
652 |
kvm_virtio_pci_vector_use, |
653 |
kvm_virtio_pci_vector_release, |
654 |
kvm_virtio_pci_vector_poll); |
655 |
if (r < 0) { |
656 |
goto assign_error;
|
657 |
} |
658 |
} |
659 |
|
660 |
return 0; |
661 |
|
662 |
assign_error:
|
663 |
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
|
664 |
assert(assign); |
665 |
while (--n >= 0) { |
666 |
virtio_pci_set_guest_notifier(d, n, !assign, with_irqfd); |
667 |
} |
668 |
return r;
|
669 |
} |
670 |
|
671 |
static int virtio_pci_set_host_notifier(DeviceState *d, int n, bool assign) |
672 |
{ |
673 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
674 |
|
675 |
/* Stop using ioeventfd for virtqueue kick if the device starts using host
|
676 |
* notifiers. This makes it easy to avoid stepping on each others' toes.
|
677 |
*/
|
678 |
proxy->ioeventfd_disabled = assign; |
679 |
if (assign) {
|
680 |
virtio_pci_stop_ioeventfd(proxy); |
681 |
} |
682 |
/* We don't need to start here: it's not needed because backend
|
683 |
* currently only stops on status change away from ok,
|
684 |
* reset, vmstop and such. If we do add code to start here,
|
685 |
* need to check vmstate, device state etc. */
|
686 |
return virtio_pci_set_host_notifier_internal(proxy, n, assign, false); |
687 |
} |
688 |
|
689 |
static void virtio_pci_vmstate_change(DeviceState *d, bool running) |
690 |
{ |
691 |
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d); |
692 |
|
693 |
if (running) {
|
694 |
/* Try to find out if the guest has bus master disabled, but is
|
695 |
in ready state. Then we have a buggy guest OS. */
|
696 |
if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
697 |
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) { |
698 |
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG; |
699 |
} |
700 |
virtio_pci_start_ioeventfd(proxy); |
701 |
} else {
|
702 |
virtio_pci_stop_ioeventfd(proxy); |
703 |
} |
704 |
} |
705 |
|
706 |
static const VirtIOBindings virtio_pci_bindings = { |
707 |
.notify = virtio_pci_notify, |
708 |
.save_config = virtio_pci_save_config, |
709 |
.load_config = virtio_pci_load_config, |
710 |
.save_queue = virtio_pci_save_queue, |
711 |
.load_queue = virtio_pci_load_queue, |
712 |
.get_features = virtio_pci_get_features, |
713 |
.query_guest_notifiers = virtio_pci_query_guest_notifiers, |
714 |
.set_host_notifier = virtio_pci_set_host_notifier, |
715 |
.set_guest_notifiers = virtio_pci_set_guest_notifiers, |
716 |
.vmstate_change = virtio_pci_vmstate_change, |
717 |
}; |
718 |
|
719 |
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
|
720 |
{ |
721 |
uint8_t *config; |
722 |
uint32_t size; |
723 |
|
724 |
proxy->vdev = vdev; |
725 |
|
726 |
config = proxy->pci_dev.config; |
727 |
|
728 |
if (proxy->class_code) {
|
729 |
pci_config_set_class(config, proxy->class_code); |
730 |
} |
731 |
pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID, |
732 |
pci_get_word(config + PCI_VENDOR_ID)); |
733 |
pci_set_word(config + PCI_SUBSYSTEM_ID, vdev->device_id); |
734 |
config[PCI_INTERRUPT_PIN] = 1;
|
735 |
|
736 |
if (vdev->nvectors &&
|
737 |
msix_init_exclusive_bar(&proxy->pci_dev, vdev->nvectors, 1)) {
|
738 |
vdev->nvectors = 0;
|
739 |
} |
740 |
|
741 |
proxy->pci_dev.config_write = virtio_write_config; |
742 |
|
743 |
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len; |
744 |
if (size & (size-1)) |
745 |
size = 1 << qemu_fls(size);
|
746 |
|
747 |
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy, |
748 |
"virtio-pci", size);
|
749 |
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
|
750 |
&proxy->bar); |
751 |
|
752 |
if (!kvm_has_many_ioeventfds()) {
|
753 |
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; |
754 |
} |
755 |
|
756 |
virtio_bind_device(vdev, &virtio_pci_bindings, DEVICE(proxy)); |
757 |
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
|
758 |
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
|
759 |
proxy->host_features = vdev->get_features(vdev, proxy->host_features); |
760 |
} |
761 |
|
762 |
static int virtio_blk_init_pci(PCIDevice *pci_dev) |
763 |
{ |
764 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
765 |
VirtIODevice *vdev; |
766 |
|
767 |
if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
|
768 |
proxy->class_code != PCI_CLASS_STORAGE_OTHER) |
769 |
proxy->class_code = PCI_CLASS_STORAGE_SCSI; |
770 |
|
771 |
vdev = virtio_blk_init(&pci_dev->qdev, &proxy->blk); |
772 |
if (!vdev) {
|
773 |
return -1; |
774 |
} |
775 |
vdev->nvectors = proxy->nvectors; |
776 |
virtio_init_pci(proxy, vdev); |
777 |
/* make the actual value visible */
|
778 |
proxy->nvectors = vdev->nvectors; |
779 |
return 0; |
780 |
} |
781 |
|
782 |
static void virtio_exit_pci(PCIDevice *pci_dev) |
783 |
{ |
784 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
785 |
|
786 |
memory_region_destroy(&proxy->bar); |
787 |
msix_uninit_exclusive_bar(pci_dev); |
788 |
} |
789 |
|
790 |
static void virtio_blk_exit_pci(PCIDevice *pci_dev) |
791 |
{ |
792 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
793 |
|
794 |
virtio_pci_stop_ioeventfd(proxy); |
795 |
virtio_blk_exit(proxy->vdev); |
796 |
virtio_exit_pci(pci_dev); |
797 |
} |
798 |
|
799 |
static int virtio_serial_init_pci(PCIDevice *pci_dev) |
800 |
{ |
801 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
802 |
VirtIODevice *vdev; |
803 |
|
804 |
if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
|
805 |
proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
|
806 |
proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
|
807 |
proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER; |
808 |
|
809 |
vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial); |
810 |
if (!vdev) {
|
811 |
return -1; |
812 |
} |
813 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
814 |
? proxy->serial.max_virtserial_ports + 1
|
815 |
: proxy->nvectors; |
816 |
virtio_init_pci(proxy, vdev); |
817 |
proxy->nvectors = vdev->nvectors; |
818 |
return 0; |
819 |
} |
820 |
|
821 |
static void virtio_serial_exit_pci(PCIDevice *pci_dev) |
822 |
{ |
823 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
824 |
|
825 |
virtio_pci_stop_ioeventfd(proxy); |
826 |
virtio_serial_exit(proxy->vdev); |
827 |
virtio_exit_pci(pci_dev); |
828 |
} |
829 |
|
830 |
static int virtio_net_init_pci(PCIDevice *pci_dev) |
831 |
{ |
832 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
833 |
VirtIODevice *vdev; |
834 |
|
835 |
vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net); |
836 |
|
837 |
vdev->nvectors = proxy->nvectors; |
838 |
virtio_init_pci(proxy, vdev); |
839 |
|
840 |
/* make the actual value visible */
|
841 |
proxy->nvectors = vdev->nvectors; |
842 |
return 0; |
843 |
} |
844 |
|
845 |
static void virtio_net_exit_pci(PCIDevice *pci_dev) |
846 |
{ |
847 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
848 |
|
849 |
virtio_pci_stop_ioeventfd(proxy); |
850 |
virtio_net_exit(proxy->vdev); |
851 |
virtio_exit_pci(pci_dev); |
852 |
} |
853 |
|
854 |
static int virtio_balloon_init_pci(PCIDevice *pci_dev) |
855 |
{ |
856 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
857 |
VirtIODevice *vdev; |
858 |
|
859 |
if (proxy->class_code != PCI_CLASS_OTHERS &&
|
860 |
proxy->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
|
861 |
proxy->class_code = PCI_CLASS_OTHERS; |
862 |
} |
863 |
|
864 |
vdev = virtio_balloon_init(&pci_dev->qdev); |
865 |
if (!vdev) {
|
866 |
return -1; |
867 |
} |
868 |
virtio_init_pci(proxy, vdev); |
869 |
return 0; |
870 |
} |
871 |
|
872 |
static void virtio_balloon_exit_pci(PCIDevice *pci_dev) |
873 |
{ |
874 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
875 |
|
876 |
virtio_pci_stop_ioeventfd(proxy); |
877 |
virtio_balloon_exit(proxy->vdev); |
878 |
virtio_exit_pci(pci_dev); |
879 |
} |
880 |
|
881 |
static int virtio_rng_init_pci(PCIDevice *pci_dev) |
882 |
{ |
883 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
884 |
VirtIODevice *vdev; |
885 |
|
886 |
if (proxy->rng.rng == NULL) { |
887 |
proxy->rng.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM)); |
888 |
|
889 |
object_property_add_child(OBJECT(pci_dev), |
890 |
"default-backend",
|
891 |
OBJECT(proxy->rng.default_backend), |
892 |
NULL);
|
893 |
|
894 |
object_property_set_link(OBJECT(pci_dev), |
895 |
OBJECT(proxy->rng.default_backend), |
896 |
"rng", NULL); |
897 |
} |
898 |
|
899 |
vdev = virtio_rng_init(&pci_dev->qdev, &proxy->rng); |
900 |
if (!vdev) {
|
901 |
return -1; |
902 |
} |
903 |
virtio_init_pci(proxy, vdev); |
904 |
return 0; |
905 |
} |
906 |
|
907 |
static void virtio_rng_exit_pci(PCIDevice *pci_dev) |
908 |
{ |
909 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
910 |
|
911 |
virtio_pci_stop_ioeventfd(proxy); |
912 |
virtio_rng_exit(proxy->vdev); |
913 |
virtio_exit_pci(pci_dev); |
914 |
} |
915 |
|
916 |
static Property virtio_blk_properties[] = {
|
917 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
918 |
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, blk.conf), |
919 |
DEFINE_BLOCK_CHS_PROPERTIES(VirtIOPCIProxy, blk.conf), |
920 |
DEFINE_PROP_STRING("serial", VirtIOPCIProxy, blk.serial),
|
921 |
#ifdef __linux__
|
922 |
DEFINE_PROP_BIT("scsi", VirtIOPCIProxy, blk.scsi, 0, true), |
923 |
#endif
|
924 |
DEFINE_PROP_BIT("config-wce", VirtIOPCIProxy, blk.config_wce, 0, true), |
925 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
926 |
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
|
927 |
DEFINE_PROP_BIT("x-data-plane", VirtIOPCIProxy, blk.data_plane, 0, false), |
928 |
#endif
|
929 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
930 |
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features), |
931 |
DEFINE_PROP_END_OF_LIST(), |
932 |
}; |
933 |
|
934 |
static void virtio_blk_class_init(ObjectClass *klass, void *data) |
935 |
{ |
936 |
DeviceClass *dc = DEVICE_CLASS(klass); |
937 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
938 |
|
939 |
k->init = virtio_blk_init_pci; |
940 |
k->exit = virtio_blk_exit_pci; |
941 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
942 |
k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK; |
943 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
944 |
k->class_id = PCI_CLASS_STORAGE_SCSI; |
945 |
dc->reset = virtio_pci_reset; |
946 |
dc->props = virtio_blk_properties; |
947 |
} |
948 |
|
949 |
static TypeInfo virtio_blk_info = {
|
950 |
.name = "virtio-blk-pci",
|
951 |
.parent = TYPE_PCI_DEVICE, |
952 |
.instance_size = sizeof(VirtIOPCIProxy),
|
953 |
.class_init = virtio_blk_class_init, |
954 |
}; |
955 |
|
956 |
static Property virtio_net_properties[] = {
|
957 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false), |
958 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3), |
959 |
DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features), |
960 |
DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic), |
961 |
DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy, net.txtimer, TX_TIMER_INTERVAL),
|
962 |
DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy, net.txburst, TX_BURST),
|
963 |
DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
|
964 |
DEFINE_PROP_END_OF_LIST(), |
965 |
}; |
966 |
|
967 |
static void virtio_net_class_init(ObjectClass *klass, void *data) |
968 |
{ |
969 |
DeviceClass *dc = DEVICE_CLASS(klass); |
970 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
971 |
|
972 |
k->init = virtio_net_init_pci; |
973 |
k->exit = virtio_net_exit_pci; |
974 |
k->romfile = "pxe-virtio.rom";
|
975 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
976 |
k->device_id = PCI_DEVICE_ID_VIRTIO_NET; |
977 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
978 |
k->class_id = PCI_CLASS_NETWORK_ETHERNET; |
979 |
dc->reset = virtio_pci_reset; |
980 |
dc->props = virtio_net_properties; |
981 |
} |
982 |
|
983 |
static TypeInfo virtio_net_info = {
|
984 |
.name = "virtio-net-pci",
|
985 |
.parent = TYPE_PCI_DEVICE, |
986 |
.instance_size = sizeof(VirtIOPCIProxy),
|
987 |
.class_init = virtio_net_class_init, |
988 |
}; |
989 |
|
990 |
static Property virtio_serial_properties[] = {
|
991 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
992 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
993 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
994 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
995 |
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31), |
996 |
DEFINE_PROP_END_OF_LIST(), |
997 |
}; |
998 |
|
999 |
static void virtio_serial_class_init(ObjectClass *klass, void *data) |
1000 |
{ |
1001 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1002 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1003 |
|
1004 |
k->init = virtio_serial_init_pci; |
1005 |
k->exit = virtio_serial_exit_pci; |
1006 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1007 |
k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE; |
1008 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1009 |
k->class_id = PCI_CLASS_COMMUNICATION_OTHER; |
1010 |
dc->reset = virtio_pci_reset; |
1011 |
dc->props = virtio_serial_properties; |
1012 |
} |
1013 |
|
1014 |
static TypeInfo virtio_serial_info = {
|
1015 |
.name = "virtio-serial-pci",
|
1016 |
.parent = TYPE_PCI_DEVICE, |
1017 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1018 |
.class_init = virtio_serial_class_init, |
1019 |
}; |
1020 |
|
1021 |
static Property virtio_balloon_properties[] = {
|
1022 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1023 |
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0), |
1024 |
DEFINE_PROP_END_OF_LIST(), |
1025 |
}; |
1026 |
|
1027 |
static void virtio_balloon_class_init(ObjectClass *klass, void *data) |
1028 |
{ |
1029 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1030 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1031 |
|
1032 |
k->init = virtio_balloon_init_pci; |
1033 |
k->exit = virtio_balloon_exit_pci; |
1034 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1035 |
k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON; |
1036 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1037 |
k->class_id = PCI_CLASS_OTHERS; |
1038 |
dc->reset = virtio_pci_reset; |
1039 |
dc->props = virtio_balloon_properties; |
1040 |
} |
1041 |
|
1042 |
static TypeInfo virtio_balloon_info = {
|
1043 |
.name = "virtio-balloon-pci",
|
1044 |
.parent = TYPE_PCI_DEVICE, |
1045 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1046 |
.class_init = virtio_balloon_class_init, |
1047 |
}; |
1048 |
|
1049 |
static void virtio_rng_initfn(Object *obj) |
1050 |
{ |
1051 |
PCIDevice *pci_dev = PCI_DEVICE(obj); |
1052 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1053 |
|
1054 |
object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
|
1055 |
(Object **)&proxy->rng.rng, NULL);
|
1056 |
} |
1057 |
|
1058 |
static Property virtio_rng_properties[] = {
|
1059 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
1060 |
/* Set a default rate limit of 2^47 bytes per minute or roughly 2TB/s. If
|
1061 |
you have an entropy source capable of generating more entropy than this
|
1062 |
and you can pass it through via virtio-rng, then hats off to you. Until
|
1063 |
then, this is unlimited for all practical purposes.
|
1064 |
*/
|
1065 |
DEFINE_PROP_UINT64("max-bytes", VirtIOPCIProxy, rng.max_bytes, INT64_MAX),
|
1066 |
DEFINE_PROP_UINT32("period", VirtIOPCIProxy, rng.period_ms, 1 << 16), |
1067 |
DEFINE_PROP_END_OF_LIST(), |
1068 |
}; |
1069 |
|
1070 |
static void virtio_rng_class_init(ObjectClass *klass, void *data) |
1071 |
{ |
1072 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1073 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1074 |
|
1075 |
k->init = virtio_rng_init_pci; |
1076 |
k->exit = virtio_rng_exit_pci; |
1077 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1078 |
k->device_id = PCI_DEVICE_ID_VIRTIO_RNG; |
1079 |
k->revision = VIRTIO_PCI_ABI_VERSION; |
1080 |
k->class_id = PCI_CLASS_OTHERS; |
1081 |
dc->reset = virtio_pci_reset; |
1082 |
dc->props = virtio_rng_properties; |
1083 |
} |
1084 |
|
1085 |
static TypeInfo virtio_rng_info = {
|
1086 |
.name = "virtio-rng-pci",
|
1087 |
.parent = TYPE_PCI_DEVICE, |
1088 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1089 |
.instance_init = virtio_rng_initfn, |
1090 |
.class_init = virtio_rng_class_init, |
1091 |
}; |
1092 |
|
1093 |
static int virtio_scsi_init_pci(PCIDevice *pci_dev) |
1094 |
{ |
1095 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1096 |
VirtIODevice *vdev; |
1097 |
|
1098 |
vdev = virtio_scsi_init(&pci_dev->qdev, &proxy->scsi); |
1099 |
if (!vdev) {
|
1100 |
return -EINVAL;
|
1101 |
} |
1102 |
|
1103 |
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED |
1104 |
? proxy->scsi.num_queues + 3
|
1105 |
: proxy->nvectors; |
1106 |
virtio_init_pci(proxy, vdev); |
1107 |
|
1108 |
/* make the actual value visible */
|
1109 |
proxy->nvectors = vdev->nvectors; |
1110 |
return 0; |
1111 |
} |
1112 |
|
1113 |
static void virtio_scsi_exit_pci(PCIDevice *pci_dev) |
1114 |
{ |
1115 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
1116 |
|
1117 |
virtio_scsi_exit(proxy->vdev); |
1118 |
virtio_exit_pci(pci_dev); |
1119 |
} |
1120 |
|
1121 |
static Property virtio_scsi_properties[] = {
|
1122 |
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), |
1123 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
1124 |
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOPCIProxy, host_features, scsi), |
1125 |
DEFINE_PROP_END_OF_LIST(), |
1126 |
}; |
1127 |
|
1128 |
static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
1129 |
{ |
1130 |
DeviceClass *dc = DEVICE_CLASS(klass); |
1131 |
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
1132 |
|
1133 |
k->init = virtio_scsi_init_pci; |
1134 |
k->exit = virtio_scsi_exit_pci; |
1135 |
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET; |
1136 |
k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI; |
1137 |
k->revision = 0x00;
|
1138 |
k->class_id = PCI_CLASS_STORAGE_SCSI; |
1139 |
dc->reset = virtio_pci_reset; |
1140 |
dc->props = virtio_scsi_properties; |
1141 |
} |
1142 |
|
1143 |
static TypeInfo virtio_scsi_info = {
|
1144 |
.name = "virtio-scsi-pci",
|
1145 |
.parent = TYPE_PCI_DEVICE, |
1146 |
.instance_size = sizeof(VirtIOPCIProxy),
|
1147 |
.class_init = virtio_scsi_class_init, |
1148 |
}; |
1149 |
|
1150 |
static void virtio_pci_register_types(void) |
1151 |
{ |
1152 |
type_register_static(&virtio_blk_info); |
1153 |
type_register_static(&virtio_net_info); |
1154 |
type_register_static(&virtio_serial_info); |
1155 |
type_register_static(&virtio_balloon_info); |
1156 |
type_register_static(&virtio_scsi_info); |
1157 |
type_register_static(&virtio_rng_info); |
1158 |
} |
1159 |
|
1160 |
type_init(virtio_pci_register_types) |