f12c1ebddf
This commit introduces a vhost-user device for SCSI. This is based
on the existing vhost-scsi implementation, but done over vhost-user
instead. It also uses a chardev to connect to the backend. Unlike
vhost-scsi (today), VMs using vhost-user-scsi can be live migrated.
To use it, start Qemu with a command line equivalent to:
qemu-system-x86_64 \
-chardev socket,id=vus0,path=/tmp/vus.sock \
-device vhost-user-scsi-pci,chardev=vus0,bus=pci.0,addr=...
A separate commit presents a sample application linked with libiscsi to
provide a backend for vhost-user-scsi.
Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
Message-Id: <1488479153-21203-4-git-send-email-felipe@nutanix.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
400 lines
10 KiB
C
400 lines
10 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-input.h"
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#include "hw/virtio/virtio-gpu.h"
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#include "hw/virtio/virtio-crypto.h"
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#include "hw/virtio/vhost-user-scsi.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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#ifdef CONFIG_VHOST_VSOCK
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#include "hw/virtio/vhost-vsock.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 VHostUserSCSIPCI VHostUserSCSIPCI;
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typedef struct VirtIORngPCI VirtIORngPCI;
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typedef struct VirtIOInputPCI VirtIOInputPCI;
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typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI;
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typedef struct VirtIOInputHostPCI VirtIOInputHostPCI;
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typedef struct VirtIOGPUPCI VirtIOGPUPCI;
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typedef struct VHostVSockPCI VHostVSockPCI;
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typedef struct VirtIOCryptoPCI VirtIOCryptoPCI;
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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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enum {
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VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT,
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VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT,
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VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT,
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VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT,
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VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT,
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VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT,
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VIRTIO_PCI_FLAG_ATS_BIT,
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VIRTIO_PCI_FLAG_INIT_DEVERR_BIT,
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VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT,
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VIRTIO_PCI_FLAG_INIT_PM_BIT,
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};
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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 \
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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 (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
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/* virtio version flags */
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#define VIRTIO_PCI_FLAG_DISABLE_PCIE (1 << VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT)
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/* migrate extra state */
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#define VIRTIO_PCI_FLAG_MIGRATE_EXTRA (1 << VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT)
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/* have pio notification for modern device ? */
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#define VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY \
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(1 << VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT)
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/* page per vq flag to be used by split drivers within guests */
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#define VIRTIO_PCI_FLAG_PAGE_PER_VQ \
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(1 << VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT)
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/* address space translation service */
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#define VIRTIO_PCI_FLAG_ATS (1 << VIRTIO_PCI_FLAG_ATS_BIT)
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/* Init error enabling flags */
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#define VIRTIO_PCI_FLAG_INIT_DEVERR (1 << VIRTIO_PCI_FLAG_INIT_DEVERR_BIT)
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/* Init Link Control register */
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#define VIRTIO_PCI_FLAG_INIT_LNKCTL (1 << VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT)
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/* Init Power Management */
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#define VIRTIO_PCI_FLAG_INIT_PM (1 << VIRTIO_PCI_FLAG_INIT_PM_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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DeviceRealize parent_dc_realize;
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void (*realize)(VirtIOPCIProxy *vpci_dev, Error **errp);
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} VirtioPCIClass;
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typedef struct VirtIOPCIRegion {
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MemoryRegion mr;
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uint32_t offset;
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uint32_t size;
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uint32_t type;
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} VirtIOPCIRegion;
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typedef struct VirtIOPCIQueue {
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uint16_t num;
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bool enabled;
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uint32_t desc[2];
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uint32_t avail[2];
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uint32_t used[2];
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} VirtIOPCIQueue;
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struct VirtIOPCIProxy {
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PCIDevice pci_dev;
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MemoryRegion bar;
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VirtIOPCIRegion common;
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VirtIOPCIRegion isr;
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VirtIOPCIRegion device;
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VirtIOPCIRegion notify;
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VirtIOPCIRegion notify_pio;
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MemoryRegion modern_bar;
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MemoryRegion io_bar;
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MemoryRegion modern_cfg;
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AddressSpace modern_as;
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uint32_t legacy_io_bar_idx;
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uint32_t msix_bar_idx;
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uint32_t modern_io_bar_idx;
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uint32_t modern_mem_bar_idx;
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int config_cap;
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uint32_t flags;
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bool disable_modern;
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bool ignore_backend_features;
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OnOffAuto disable_legacy;
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uint32_t class_code;
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uint32_t nvectors;
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uint32_t dfselect;
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uint32_t gfselect;
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uint32_t guest_features[2];
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VirtIOPCIQueue vqs[VIRTIO_QUEUE_MAX];
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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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static inline bool virtio_pci_modern(VirtIOPCIProxy *proxy)
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{
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return !proxy->disable_modern;
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}
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static inline bool virtio_pci_legacy(VirtIOPCIProxy *proxy)
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{
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return proxy->disable_legacy == ON_OFF_AUTO_OFF;
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}
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static inline void virtio_pci_force_virtio_1(VirtIOPCIProxy *proxy)
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{
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proxy->disable_modern = false;
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proxy->disable_legacy = ON_OFF_AUTO_ON;
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}
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static inline void virtio_pci_disable_modern(VirtIOPCIProxy *proxy)
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{
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proxy->disable_modern = true;
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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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#define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci"
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#define VHOST_USER_SCSI_PCI(obj) \
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OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
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struct VHostUserSCSIPCI {
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VirtIOPCIProxy parent_obj;
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VHostUserSCSI vdev;
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};
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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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V9fsVirtioState 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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/*
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* virtio-input-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_INPUT_PCI "virtio-input-pci"
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#define VIRTIO_INPUT_PCI(obj) \
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OBJECT_CHECK(VirtIOInputPCI, (obj), TYPE_VIRTIO_INPUT_PCI)
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struct VirtIOInputPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOInput vdev;
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};
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#define TYPE_VIRTIO_INPUT_HID_PCI "virtio-input-hid-pci"
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#define TYPE_VIRTIO_KEYBOARD_PCI "virtio-keyboard-pci"
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#define TYPE_VIRTIO_MOUSE_PCI "virtio-mouse-pci"
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#define TYPE_VIRTIO_TABLET_PCI "virtio-tablet-pci"
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#define VIRTIO_INPUT_HID_PCI(obj) \
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OBJECT_CHECK(VirtIOInputHIDPCI, (obj), TYPE_VIRTIO_INPUT_HID_PCI)
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struct VirtIOInputHIDPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOInputHID vdev;
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};
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#ifdef CONFIG_LINUX
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#define TYPE_VIRTIO_INPUT_HOST_PCI "virtio-input-host-pci"
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#define VIRTIO_INPUT_HOST_PCI(obj) \
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OBJECT_CHECK(VirtIOInputHostPCI, (obj), TYPE_VIRTIO_INPUT_HOST_PCI)
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struct VirtIOInputHostPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOInputHost vdev;
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};
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#endif
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/*
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* virtio-gpu-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_GPU_PCI "virtio-gpu-pci"
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#define VIRTIO_GPU_PCI(obj) \
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OBJECT_CHECK(VirtIOGPUPCI, (obj), TYPE_VIRTIO_GPU_PCI)
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struct VirtIOGPUPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOGPU vdev;
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};
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#ifdef CONFIG_VHOST_VSOCK
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/*
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* vhost-vsock-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VHOST_VSOCK_PCI "vhost-vsock-pci"
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#define VHOST_VSOCK_PCI(obj) \
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OBJECT_CHECK(VHostVSockPCI, (obj), TYPE_VHOST_VSOCK_PCI)
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struct VHostVSockPCI {
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VirtIOPCIProxy parent_obj;
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VHostVSock vdev;
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};
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#endif
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/*
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* virtio-crypto-pci: This extends VirtioPCIProxy.
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*/
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#define TYPE_VIRTIO_CRYPTO_PCI "virtio-crypto-pci"
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#define VIRTIO_CRYPTO_PCI(obj) \
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OBJECT_CHECK(VirtIOCryptoPCI, (obj), TYPE_VIRTIO_CRYPTO_PCI)
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struct VirtIOCryptoPCI {
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VirtIOPCIProxy parent_obj;
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VirtIOCrypto 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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