hw/virtio-pci.h

   1 /*
   2  * Virtio PCI Bindings
   3  *
   4  * Copyright IBM, Corp. 2007
   5  * Copyright (c) 2009 CodeSourcery
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Paul Brook        <paul@codesourcery.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  */
  14
  15 #ifndef QEMU_VIRTIO_PCI_H
  16 #define QEMU_VIRTIO_PCI_H
  17
  18 #include "virtio-net.h"
  19 #include "virtio-serial.h"
  20
  21 /* Performance improves when virtqueue kick processing is decoupled from the
  22  * vcpu thread using ioeventfd for some devices. */
  23 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
  24 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
  25
  26 typedef struct {
  27     PCIDevice pci_dev;
  28     VirtIODevice *vdev;
  29     MemoryRegion bar;
  30     MemoryRegion msix_bar;
  31     uint32_t flags;
  32     uint32_t class_code;
  33     uint32_t nvectors;
  34     BlockConf block;
  35     char *block_serial;
  36     NICConf nic;
  37     uint32_t host_features;
  38 #ifdef CONFIG_LINUX
  39     V9fsConf fsconf;
  40 #endif
  41     virtio_serial_conf serial;
  42     virtio_net_conf net;
  43     bool ioeventfd_disabled;
  44     bool ioeventfd_started;
  45 } VirtIOPCIProxy;
  46
  47 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
  48
  49 /* Virtio ABI version, if we increment this, we break the guest driver. */
  50 #define VIRTIO_PCI_ABI_VERSION          0
  51
  52 #endif