Virtio legacy device (ver < 1.0) uses a single PIO for all virtqueues.
Notifications from different virtqueues are implemented by writing
virtqueue index to the PIO. Writing different values to the same addr
needs to be mapped to different eventfds by asyncio. This is called
data match feature of asyncio.
v3 -> v4:
* Update the definition of `struct asyncio_desc`
Use `struct acrn_asyncio_info` inside it, instaed of defining the duplicated
fileds.
* Update `add_asyncio` to use `memcpy_s` rather than assigning all the fields
using 5 assignment statements.
* Update `asyncio_is_conflict` for coding style
120-character line is sufficient to write all conditions.
* Update the checks related to `wildcard`
Because we require every conditional clause to have a Boolean type
in the coding guideline.
v2 -> v3:
No change
v1 -> v2:
No change
Tracked-On: #8612
Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
Signed-off-by: Shiqing Gao <shiqing.gao@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>
74bc2f7cfb