feat: implement virtio based host-guest communication - #1794
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Initialize queues before first guest entry. Carry host calls, logs, external values, and bounded responses over G2H chains. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Route guest calls, host calls, results, and logs through bidirectional packed virtqueues. Stream dense messages across exact chain batches and reserve H2G capacity for retained external values. Keep external byte returns typed through guest dispatch and support owner-backed byte chunks in Rust and C guests. Store canonical rings in a versioned OCI transport layer and validate them during snapshot load and restore. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Enter the guest once before capture to canonicalize both queues. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Report retained pool slots through the checkpoint mailbox. Keep rejected sandboxes usable for release and retry. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
This still will cause OOM as the test requires but will increase initial heap size so that virtqueus finish initialization. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
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See rendered design doc. For broader context see HIP PR: #1112
This patch replaces stack based communication with function calls transported over virtual queues. The documentation covers two current limitations: snapshots do not support retained buffers, and the host owns the transport arena. Addressing both is deferred to future work.