Re: [PATCH v6 resend 0/4] add generic vDPA device support

[Longpeng (Mike, Cloud Infrastructure Service Product Dept.)]

在 2022/5/31 16:50, Jason Wang 写道:
> On Mon, May 30, 2022 at 12:16 PM Longpeng (Mike, Cloud Infrastructure
> Service Product Dept.) <longpeng2@huawei.com> wrote:
> > Hi guys,
> >
> > Ping...Any other comments?
>
> Looks good to me.
>
> Acked-by: Jason Wang <jasowang@redhat.com>
>
> (This probably requires a rebase since it doesn't apply cleanly on master).

Okay, I'll rebase in next version.
Thanks.

> Thanks
>
> > 在 2022/5/14 12:11, Longpeng(Mike) 写道:
> > > From: Longpeng <longpeng2@huawei.com>
> > >
> > > Hi guys,
> > >
> > > With the generic vDPA device, QEMU won't need to touch the device
> > > types any more, such like vfio.
> > >
> > > We can use the generic vDPA device as follow:
> > >     -device vhost-vdpa-device-pci,vhostdev=/dev/vhost-vdpa-X
> > >     Or
> > >     -M microvm -m 512m -smp 2 -kernel ... -initrd ... -device \
> > >     vhost-vdpa-device,vhostdev=/dev/vhost-vdpa-x
> > >
> > > I've done some simple tests on Huawei's offloading card (net, 0.95).
> > >
> > > Changes v5 -> v6:
> > >     Patch 2:
> > >       - Turn to the original approach in the RFC to initialize the
> > >         virtio_pci_id_info array. [Michael]
> > >          https://lore.kernel.org/all/20220105005900.860-2-longpeng2@huawei.com/
> > >     Patch 3:
> > >       - Fix logical error of exception handler around the post_init.
> > >         [Stefano]
> > >       - Fix some coding style warnings. [Stefano]
> > >     Patch 4:
> > >       - Fix some coding style warnings. [Stefano]
> > >
> > > Changes v4 -> v5:
> > >     Patch 3:
> > >       - remove vhostfd [Jason]
> > >       - support virtio-mmio [Jason]
> > >
> > > Changes v3 -> v4:
> > >     v3: https://www.mail-archive.com/qemu-devel@nongnu.org/msg877015.html
> > >     - reorganize the series [Stefano]
> > >     - fix some typos [Stefano]
> > >     - fix logical error in vhost_vdpa_device_realize [Stefano]
> > >
> > > Changes v2 -> v3
> > >     Patch 4 & 5:
> > >       - only call vdpa ioctls in vdpa-dev.c [Stefano, Longpeng]
> > >       - s/VQS_NUM/VQS_COUNT  [Stefano]
> > >       - check both vdpa_dev_fd and vdpa_dev [Stefano]
> > >     Patch 6:
> > >       - move all steps into vhost_vdpa_device_unrealize. [Stefano]
> > >
> > > Changes RFC -> v2
> > >     Patch 1:
> > >       - rename 'pdev_id' to 'trans_devid'  [Michael]
> > >       - only use transitional device id for the devices
> > >         listed in the spec  [Michael]
> > >       - use macros to make the id_info table clearer  [Longpeng]
> > >       - add some modern devices in the id_info table  [Longpeng]
> > >     Patch 2:
> > >       - remove the GET_VECTORS_NUM command  [Jason]
> > >     Patch 4:
> > >       - expose vdpa_dev_fd as a QOM preperty  [Stefan]
> > >       - introduce vhost_vdpa_device_get_u32 as a common
> > >         function to make the code clearer  [Stefan]
> > >       - fix the misleading description of 'dc->desc'  [Stefano]
> > >     Patch 5:
> > >       - check returned number of virtqueues  [Stefan]
> > >     Patch 6:
> > >       - init s->num_queues  [Stefano]
> > >       - free s->dev.vqs  [Stefano]
> > >
> > >
> > > Longpeng (Mike) (4):
> > >     linux-headers: Update headers to Linux 5.18-rc6
> > >     virtio: get class_id and pci device id by the virtio id
> > >     vdpa: add vdpa-dev support
> > >     vdpa: add vdpa-dev-pci support
> > >
> > >    hw/virtio/Kconfig            |   5 +
> > >    hw/virtio/meson.build        |   2 +
> > >    hw/virtio/vdpa-dev-pci.c     | 102 ++++++++++
> > >    hw/virtio/vdpa-dev.c         | 377 +++++++++++++++++++++++++++++++++++
> > >    hw/virtio/virtio-pci.c       |  88 ++++++++
> > >    hw/virtio/virtio-pci.h       |   5 +
> > >    include/hw/virtio/vdpa-dev.h |  43 ++++
> > >    linux-headers/linux/vhost.h  |   7 +
> > >    8 files changed, 629 insertions(+)
> > >    create mode 100644 hw/virtio/vdpa-dev-pci.c
> > >    create mode 100644 hw/virtio/vdpa-dev.c
> > >    create mode 100644 include/hw/virtio/vdpa-dev.h
>
> .