From: Longpeng <longpeng2@huawei.com>
Hi guys,
This patchset tries to support the generic vDPA device, the previous
disscussion can be found here [1].
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,vdpa-dev=/dev/vhost-vdpa-X
I've done some simple tests on Huawei's offloading card (net, 0.95)
and vdpa_sim_blk (1.0);
The kernel part:
https://lkml.org/lkml/2022/1/17/239
Changes RFC -> v1
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) (10):
virtio: get class_id and pci device id by the virtio id
update linux headers
vdpa: add the infrastructure of vdpa-dev
vdpa-dev: implement the instance_init/class_init interface
vdpa-dev: implement the realize interface
vdpa-dev: implement the unrealize interface
vdpa-dev: implement the get_config/set_config interface
vdpa-dev: implement the get_features interface
vdpa-dev: implement the set_status interface
vdpa-dev: mark the device as unmigratable
hw/virtio/Kconfig | 5 +
hw/virtio/meson.build | 2 +
hw/virtio/vdpa-dev-pci.c | 99 ++++++++++
hw/virtio/vdpa-dev.c | 357 +++++++++++++++++++++++++++++++++++
hw/virtio/virtio-pci.c | 77 ++++++++
hw/virtio/virtio-pci.h | 5 +
include/hw/virtio/vdpa-dev.h | 29 +++
linux-headers/linux/vhost.h | 7 +
8 files changed, 581 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