68a27b208a
Current support for bus master (clearing OK bit) together with the need to
support guests which do not enable PCI bus mastering, leads to extra state in
VIRTIO_PCI_FLAG_BUS_MASTER_BUG bit, which isn't robust in case of cross-version
migration for the case when guests use the device before setting DRIVER_OK.
Rip out this code, and replace it:
- Modern QEMU doesn't need VIRTIO_PCI_FLAG_BUS_MASTER_BUG
so just drop it for latest machine type.
- For compat machine types, set PCI_COMMAND if DRIVER_OK
is set.
As this is needed for 2.1 for both pc and ppc, move PC_COMPAT macros from pc.h
to a new common header.
Cc: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
210 lines
5.4 KiB
C
210 lines
5.4 KiB
C
/*
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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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#ifndef QEMU_VIRTIO_PCI_H
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#define QEMU_VIRTIO_PCI_H
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#include "hw/pci/msi.h"
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#include "hw/virtio/virtio-blk.h"
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#include "hw/virtio/virtio-net.h"
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#include "hw/virtio/virtio-rng.h"
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#include "hw/virtio/virtio-serial.h"
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#include "hw/virtio/virtio-scsi.h"
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#include "hw/virtio/virtio-balloon.h"
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#include "hw/virtio/virtio-bus.h"
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#include "hw/virtio/virtio-9p.h"
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#ifdef CONFIG_VIRTFS
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#include "hw/9pfs/virtio-9p.h"
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#endif
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#ifdef CONFIG_VHOST_SCSI
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#include "hw/virtio/vhost-scsi.h"
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#endif
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typedef struct VirtIOPCIProxy VirtIOPCIProxy;
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typedef struct VirtIOBlkPCI VirtIOBlkPCI;
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typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
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typedef struct VirtIOBalloonPCI VirtIOBalloonPCI;
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typedef struct VirtIOSerialPCI VirtIOSerialPCI;
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typedef struct VirtIONetPCI VirtIONetPCI;
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typedef struct VHostSCSIPCI VHostSCSIPCI;
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typedef struct VirtIORngPCI VirtIORngPCI;
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/* virtio-pci-bus */
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typedef struct VirtioBusState VirtioPCIBusState;
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typedef struct VirtioBusClass VirtioPCIBusClass;
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#define TYPE_VIRTIO_PCI_BUS "virtio-pci-bus"
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#define VIRTIO_PCI_BUS(obj) \
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OBJECT_CHECK(VirtioPCIBusState, (obj), TYPE_VIRTIO_PCI_BUS)
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#define VIRTIO_PCI_BUS_GET_CLASS(obj) \
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OBJECT_GET_CLASS(VirtioPCIBusClass, obj, TYPE_VIRTIO_PCI_BUS)
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#define VIRTIO_PCI_BUS_CLASS(klass) \
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OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS)
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/* Need to activate work-arounds for buggy guests at vmstate load. */
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#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT 0
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#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION \
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(1 << VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT)
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/* Performance improves when virtqueue kick processing is decoupled from the
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* vcpu thread using ioeventfd for some devices. */
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#define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
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#define VIRTIO_PCI_FLAG_USE_IOEVENTFD (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
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typedef struct {
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MSIMessage msg;
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int virq;
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unsigned int users;
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} VirtIOIRQFD;
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/*
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* virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
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*/
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#define TYPE_VIRTIO_PCI "virtio-pci"
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#define VIRTIO_PCI_GET_CLASS(obj) \
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OBJECT_GET_CLASS(VirtioPCIClass, obj, TYPE_VIRTIO_PCI)
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#define VIRTIO_PCI_CLASS(klass) \
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OBJECT_CLASS_CHECK(VirtioPCIClass, klass, TYPE_VIRTIO_PCI)
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#define VIRTIO_PCI(obj) \
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OBJECT_CHECK(VirtIOPCIProxy, (obj), TYPE_VIRTIO_PCI)
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typedef struct VirtioPCIClass {
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PCIDeviceClass parent_class;
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int (*init)(VirtIOPCIProxy *vpci_dev);
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} VirtioPCIClass;
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struct VirtIOPCIProxy {
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PCIDevice pci_dev;
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MemoryRegion bar;
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uint32_t flags;
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uint32_t class_code;
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uint32_t nvectors;
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uint32_t host_features;
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bool ioeventfd_disabled;
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bool ioeventfd_started;
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VirtIOIRQFD *vector_irqfd;
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int nvqs_with_notifiers;
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VirtioBusState bus;
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};
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/*
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* virtio-scsi-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci"
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#define VIRTIO_SCSI_PCI(obj) \
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OBJECT_CHECK(VirtIOSCSIPCI, (obj), TYPE_VIRTIO_SCSI_PCI)
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struct VirtIOSCSIPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOSCSI vdev;
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};
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#ifdef CONFIG_VHOST_SCSI
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/*
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* vhost-scsi-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci"
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#define VHOST_SCSI_PCI(obj) \
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OBJECT_CHECK(VHostSCSIPCI, (obj), TYPE_VHOST_SCSI_PCI)
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struct VHostSCSIPCI {
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VirtIOPCIProxy parent_obj;
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VHostSCSI vdev;
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};
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#endif
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/*
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* virtio-blk-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci"
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#define VIRTIO_BLK_PCI(obj) \
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OBJECT_CHECK(VirtIOBlkPCI, (obj), TYPE_VIRTIO_BLK_PCI)
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struct VirtIOBlkPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOBlock vdev;
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};
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/*
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* virtio-balloon-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_BALLOON_PCI "virtio-balloon-pci"
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#define VIRTIO_BALLOON_PCI(obj) \
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OBJECT_CHECK(VirtIOBalloonPCI, (obj), TYPE_VIRTIO_BALLOON_PCI)
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struct VirtIOBalloonPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOBalloon vdev;
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};
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/*
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* virtio-serial-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_SERIAL_PCI "virtio-serial-pci"
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#define VIRTIO_SERIAL_PCI(obj) \
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OBJECT_CHECK(VirtIOSerialPCI, (obj), TYPE_VIRTIO_SERIAL_PCI)
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struct VirtIOSerialPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOSerial vdev;
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};
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/*
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* virtio-net-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_NET_PCI "virtio-net-pci"
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#define VIRTIO_NET_PCI(obj) \
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OBJECT_CHECK(VirtIONetPCI, (obj), TYPE_VIRTIO_NET_PCI)
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struct VirtIONetPCI {
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VirtIOPCIProxy parent_obj;
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VirtIONet vdev;
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};
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/*
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* virtio-9p-pci: This extends VirtioPCIProxy.
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*/
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#ifdef CONFIG_VIRTFS
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#define TYPE_VIRTIO_9P_PCI "virtio-9p-pci"
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#define VIRTIO_9P_PCI(obj) \
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OBJECT_CHECK(V9fsPCIState, (obj), TYPE_VIRTIO_9P_PCI)
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typedef struct V9fsPCIState {
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VirtIOPCIProxy parent_obj;
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V9fsState vdev;
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} V9fsPCIState;
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#endif
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/*
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* virtio-rng-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_RNG_PCI "virtio-rng-pci"
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#define VIRTIO_RNG_PCI(obj) \
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OBJECT_CHECK(VirtIORngPCI, (obj), TYPE_VIRTIO_RNG_PCI)
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struct VirtIORngPCI {
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VirtIOPCIProxy parent_obj;
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VirtIORNG vdev;
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};
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/* Virtio ABI version, if we increment this, we break the guest driver. */
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#define VIRTIO_PCI_ABI_VERSION 0
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#endif
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