On Thu, Sep 22, 2022 at 5:23 PM Stefano Garzarella <sgarz...@redhat.com> wrote:
>
> On Thu, Sep 22, 2022 at 10:43:04AM +0800, Jason Wang wrote:
> >This patch implements features provisioning for vdpa_sim_net.
> >
> >1) validating the provisioned features to be a subset of the parent
> > features.
> >2) clearing the features that is not wanted by the userspace
> >
> >For example:
> >
> ># vdpa mgmtdev show
> >vdpasim_net:
> > supported_classes net
> > max_supported_vqs 3
> > dev_features MTU MAC CTRL_VQ CTRL_MAC_ADDR ANY_LAYOUT VERSION_1
> > ACCESS_PLATFORM
> >
> >1) provision vDPA device with all features that are supported by the
> > net simulator
> >
> ># vdpa dev add name dev1 mgmtdev vdpasim_net
> ># vdpa dev config show
> >dev1: mac 00:00:00:00:00:00 link up link_announce false mtu 1500
> > negotiated_features MTU MAC CTRL_VQ CTRL_MAC_ADDR VERSION_1 ACCESS_PLATFORM
> >
> >2) provision vDPA device with a subset of the features
> >
> ># vdpa dev add name dev1 mgmtdev vdpasim_net device_features 0x300020000
> ># vdpa dev config show
> >dev1: mac 00:00:00:00:00:00 link up link_announce false mtu 1500
> > negotiated_features CTRL_VQ VERSION_1 ACCESS_PLATFORM
> >
> >Reviewed-by: Eli Cohen <e...@nvidia.com>
> >Signed-off-by: Jason Wang <jasow...@redhat.com>
> >---
> > drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 11 ++++++++++-
> > 1 file changed, 10 insertions(+), 1 deletion(-)
> >
> >diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> >b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> >index 886449e88502..a9ba02be378b 100644
> >--- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> >+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
> >@@ -254,6 +254,14 @@ static int vdpasim_net_dev_add(struct vdpa_mgmt_dev
> >*mdev, const char *name,
> > dev_attr.work_fn = vdpasim_net_work;
> > dev_attr.buffer_size = PAGE_SIZE;
> >
> >+ if (config->mask & BIT_ULL(VDPA_ATTR_DEV_FEATURES)) {
> >+ if (config->device_features &
> >+ ~dev_attr.supported_features)
> >+ return -EINVAL;
> >+ dev_attr.supported_features &=
> >+ config->device_features;
> >+ }
> >+
>
> How about doing this inside vdpasim_create()?
>
> That way we support this feature in all simulators.
Yes, let me do that in the next version.
Thanks
>
> Thanks,
> Stefano
>
> > simdev = vdpasim_create(&dev_attr);
> > if (IS_ERR(simdev))
> > return PTR_ERR(simdev);
> >@@ -294,7 +302,8 @@ static struct vdpa_mgmt_dev mgmt_dev = {
> > .id_table = id_table,
> > .ops = &vdpasim_net_mgmtdev_ops,
> > .config_attr_mask = (1 << VDPA_ATTR_DEV_NET_CFG_MACADDR |
> >- 1 << VDPA_ATTR_DEV_NET_CFG_MTU),
> >+ 1 << VDPA_ATTR_DEV_NET_CFG_MTU |
> >+ 1 << VDPA_ATTR_DEV_FEATURES),
> > .max_supported_vqs = VDPASIM_NET_VQ_NUM,
> > .supported_features = VDPASIM_NET_FEATURES,
> > };
> >--
> >2.25.1
> >
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> >https://lists.linuxfoundation.org/mailman/listinfo/virtualization
> >
>
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