On Mon, Sep 14, 2026 at 01:22:05PM -0700, Rishi Chhibber wrote: > Summary of changes: > - 1/4 reserves a VMCI datagram resource id for the hypervisor-side > zero-copy service > - 2/4 adds the vmw_zerocopy driver: /dev/vmw_zc, a single ioctl, page > pinning and the VMCI datagram transport > - 3/4 documents the userspace interface > - 4/4 adds a kselftest covering the ioctl input-validation paths > > This series adds a misc character device, /dev/vmw_zc, that lets guest > userspace hand a buffer to a VMware hypervisor-side peer without copying > it. The driver pins the user pages, collects their guest physical frame > numbers and sends that list over a VMCI datagram; the hypervisor then > reads the buffer directly out of guest memory. An optional metadata > buffer is pinned writable so the peer can return a result through the > same mechanism.
You are going to need to get the -mm maintainers/developers to sign off on this thing before I can accept it due to your "fun" use of memory buffers in here. thanks, greg k-h
