Hi,
I am trying to assign a new virtio block device in addition to a normal virtio
block device who are accessing exactly the same cdrom drive ("/dev/sr0")
because I additionaly want to access the block device in my way by manually
calling the virtqueue_pop and virtqueue_push and not the normal way they are
called.
At the kvm startup I am assigning this additional qemu rblock device in the
vm_config_groups by adding a new QemuOptsList:
static QemuOptsList qemu_ablock_opts = {
.name = "ablock",
.head = QTAILQ_HEAD_INITIALIZER(qemu_ablock_opts.head),
.desc = {
..... normal options like the original virtio block
device .....
{ /* end of list */ }
},
};
and insert the same data like the normal virtio block device ("file=/dev/sr0"
and "if=virtio") in qemu_config.c.
After that I am calling the normal drive_init_func ("vl.c") with this command :
qemu_opts_foreach(qemu_find_opts("ablock"), drive_init_func,
&machine->use_scsi, 1);
I also added PCIDeviceInfo to the virtio_info array who looks like this:
{
.qdev.name = "additional_blk_pci",
.qdev.alias = "additional-blk",
.qdev.size = sizeof(VirtIOPCIProxy),
.init = virtio_blk_init_pci_additional,
.exit = virtio_blk_exit_pci,
.vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET,
.device_id = PCI_DEVICE_ID_VIRTIO_BLOCK,
.revision = VIRTIO_PCI_ABI_VERSION,
.class_id = PCI_CLASS_STORAGE_SCSI,
.qdev.props = (Property[]) {
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code,
0),
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
DEFINE_PROP_STRING("serial", VirtIOPCIProxy,
block_serial),
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
2),
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy,
host_features),
DEFINE_PROP_END_OF_LIST(),
},
.qdev.reset = virtio_pci_reset,
},
It is completely the same like the normal "virtio-blk-pci" except the .init
function that I replaced with my own init-function.
My problem now is that this init-function is never called when I am starting up
the kvm. It only calling the the init-function of "virtio-blk-pci" two times
and my PCIDeviceInfo init-function is completely ignored.
The initialisation of all virtio_info's in "virtio-pci.c" works fine but my
init-function is never used.
I tried to initialise only my "additional-virtio-blk-pci" device but is still
calling the init-function from "virtio-blk-pci".
I hope somebody can give me idea where the problem is.
Many thanks,
David Leib
SAP Research Belfast
SAP (UK) Limited I The Concourse I Queen's Road I Queen's Island
I Belfast BT3 9DT
mailto: david.l...@sap.com<mailto:mary.cla...@sap.com> I
www.sap.com/research<http://www.sap.com/research>
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