Handoff untypeds to a PD after initialisation#322
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Handoff untypeds to a PD after initialisation#322
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Signed-off-by: Szymon Duchniewicz <s.duchniewicz@unsw.edu.au>
* Temporarily swap the original CNode cap pointing to CNode receiving the untypeds with the one specified in the capDL spec which has a specific guard setup. Signed-off-by: Szymon Duchniewicz <s.duchniewicz@unsw.edu.au>
requires modified microkit, szymon/handoff-untypeds branch Signed-off-by: Szymon Duchniewicz <s.duchniewicz@unsw.edu.au>
* For PD that receives untypeds, compute index of the receiving untypeds CNode based on the guard size of its cap and the sizeBits of the CNode. Signed-off-by: Szymon Duchniewicz <s.duchniewicz@unsw.edu.au>
Signed-off-by: Szymon Duchniewicz <s.duchniewicz@unsw.edu.au>
This was referenced Mar 12, 2026
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Depends on changes to microkit: seL4/microkit#436
This is still WIP, but opening for tracking and visibility.
Changes to rust
capDL initializerthat allow a thread to receive capabilities to all untyped objects. Motivation for this is to a) enable static systems that require memory allocation at runtime during initialisation (see PCIe Driver Design discussion) b) enable building dynamic systems with microkit bootstrapping.Assumes that the root CNode of the TCB receiving the untypeds has been restructured similar to this proof-of-concept, see the microkit PR for more details.
TODOs:
receive_all_untypedsboolean in the capDL spec. Can't think of a better way for the CNode, but the Frame can maybe instead be a new FIllEntry? https://github.com/au-ts/rust-sel4/blob/3059c2d236bf56b066936dd48d8966255e172c3b/crates/sel4-capdl-initializer/src/initialize.rs#L570C17-L587C18