On 2025/3/1 5:21, Demi Marie Obenour wrote:
On 2/28/25 12:36 AM, Honglei Huang wrote:
From: Honglei Huang <Honglei1.Huang@xxxxxxx>
Add a new resource for blob resource, called userptr, used for let
host access guest user space memory, to acquire buffer based userptr
feature in virtio GPU.
- The capset VIRTIO_GPU_CAPSET_HSAKMT used for context init,
in this series patches only HSAKMT context can use the userptr
feature. HSAKMT is a GPU compute library in HSA stack, like
the role libdrm in mesa stack.
Userptr should not be limited to HSMKMT contexts. Userptr can
accelerate shm buffers by avoiding a copy from guest to host, and
it can be implemented using grant tables on Xen.
Yes, I totally agree userptr can accelerate shm buffers, but I currently
don't know if there are any other projects working on similar features,
or if maintainers have any opinions or better ways to implement them, so
I temporarily limit this feature to HSAKMT context only.
I am waiting for everyone's opinions, please provide your thoughts.
Regards,
Honglei
