On Mon, Feb 7, 2022 at 2:07 PM Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> wrote: > > On Mon, 7 Feb 2022 11:41:06 +0800, Jason Wang <jasowang@xxxxxxxxxx> wrote: > > > > 在 2022/1/26 下午3:35, Xuan Zhuo 写道: > > > Add queue_notify_data in struct virtio_pci_common_cfg, which comes from > > > here https://github.com/oasis-tcs/virtio-spec/issues/89 > > > > > > Since I want to add queue_reset after it, I submitted this patch first. > > > > > > Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> > > > --- > > > include/uapi/linux/virtio_pci.h | 1 + > > > 1 file changed, 1 insertion(+) > > > > > > diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h > > > index 3a86f36d7e3d..492c89f56c6a 100644 > > > --- a/include/uapi/linux/virtio_pci.h > > > +++ b/include/uapi/linux/virtio_pci.h > > > @@ -164,6 +164,7 @@ struct virtio_pci_common_cfg { > > > __le32 queue_avail_hi; /* read-write */ > > > __le32 queue_used_lo; /* read-write */ > > > __le32 queue_used_hi; /* read-write */ > > > + __le16 queue_notify_data; /* read-write */ > > > }; > > > > > > So I had the same concern as previous version. > > > > This breaks uABI where program may try to use sizeof(struct > > virtio_pci_common_cfg). > > > > We probably need a container structure here. > > I see, I plan to add a struct like this, do you think it's appropriate? > > struct virtio_pci_common_cfg_v1 { > struct virtio_pci_common_cfg cfg; > __le16 queue_notify_data; /* read-write */ > } Something like this but we probably need a better name. Thanks > > Thanks. > > > > > THanks > > > > > > > > > > /* Fields in VIRTIO_PCI_CAP_PCI_CFG: */ > > >
