From: Longpeng <longpe...@huawei.com>
i 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-longpe...@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 | 101 ++++++++++
hw/virtio/virtio-pci.h | 5 +
include/hw/virtio/vdpa-dev.h | 43 ++++
linux-headers/linux/vhost.h | 7 +
8 files changed, 642 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
--
2.23.0
