Re: [Qemu-devel] [PATCH 1/7] virtio-pmem: add virtio device

[Pankaj Gupta <pagupta@redhat.com>]

> 
> > This is the implementation of virtio-pmem device. Support will require
> > machine changes for the architectures that will support it, so it will
> > not yet be compiled. It can be unlocked with VIRTIO_PMEM_SUPPORTED per
> > machine and disabled globally via VIRTIO_PMEM.
> > 
> > We cannot use the "addr" property as that is already used e.g. for
> > virtio-pci/pci devices. And we will have e.g. virtio-pmem-pci as a proxy.
> > So we have to choose a different one (unfortunately). "memaddr" it is.
> > That name should ideally be used by all other virtio-* based memory
> > devices in the future.
> >     -device virtio-pmem-pci,id=p0,bus=bux0,addr=0x01,memaddr=0x1000000...
> > 
> > Acked-by: Markus Armbruster <armbru@redhat.com>
> > [ QAPI bits ]
> > Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
> > [ MemoryDevice/MemoryRegion changes, cleanups, addr property "memaddr",
> >   split up patches, unplug handler ]
> > Signed-off-by: David Hildenbrand <david@redhat.com>
> > ---
> >  hw/virtio/Kconfig               |  10 +++
> >  hw/virtio/Makefile.objs         |   1 +
> >  hw/virtio/virtio-pmem.c         | 190
> >  ++++++++++++++++++++++++++++++++++++++++
> >  include/hw/virtio/virtio-pmem.h |  49 +++++++++++
> >  qapi/misc.json                  |  28 +++++-
> >  5 files changed, 277 insertions(+), 1 deletion(-)
> >  create mode 100644 hw/virtio/virtio-pmem.c
> >  create mode 100644 include/hw/virtio/virtio-pmem.h
> 
> > diff --git a/hw/virtio/virtio-pmem.c b/hw/virtio/virtio-pmem.c
> > new file mode 100644
> > index 0000000000..c462d2c942
> > --- /dev/null
> > +++ b/hw/virtio/virtio-pmem.c
> > @@ -0,0 +1,190 @@
> 
> > +static void virtio_pmem_unrealize(DeviceState *dev, Error **errp)
> > +{
> > +    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
> > +    VirtIOPMEM *pmem = VIRTIO_PMEM(dev);
> > +
> > +    host_memory_backend_set_mapped(pmem->memdev, false);
> > +    pmem->rq_vq = virtio_add_queue(vdev, 128, virtio_pmem_flush);
> 
> Adding a queue during unrealize looks weird... copy/paste error?

Yes. Thanks for catching this. Will correct in v2.

Thanks,
Pankaj
> 
> > +    virtio_cleanup(vdev);
> > +}
> 
>