feat: add virtqueue transport foundations - #1793
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Read received payloads directly into caller owned storage and require paired completion of readable/writable chains. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Make pool restoration transactional. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Split and rename the pool implementations, add explicit lower/upper SlotPool regions. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Define deterministic producer and consumer reset behavior. Validate canonical events, descriptor chains, IDs, buffer policy, and unused descriptors. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Represent scratch bookkeeping with one repr(C) layout. Derive offsets and assert the host/guest ABI at compile time. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Use the first GPA of the reserved pages as an exclusive limit. Accept allocations ending at the limit and reject address overflow. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Define directional queue depths, buffer sizes, and pool page counts. Account for guest allocated rings and pools in minimum scratch calculations. Publish the transport contract through scratch-top metadata. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
This patch adds guest owned G2H and H2G rings and pools during guest initialization, and prefill H2G receive capacity. The guest then publishes their gpas through scratch metadata. The patch is also validates allocation order, scratch ownership, and canonical ring images before installing either host consumer. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Persist validated G2H and H2G ring images in running snapshots. Restore fixed transport allocations and install fresh host consumers before sandbox execution. Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Allocate logical regions atomically Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Use queue_size instead of queue_depth Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>
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