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Only tested on Armv8-R because Rust's Armv7-A targets don't have virtualization support enabled.
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HVC allows a program running at EL1 to pass information to a program (usually a Hypervisor) running at EL2.
Includes
hvc!macros, examples and default HVC handler.Should be rebased once #108 is merged, because we could do something similar with argument handling for hypercalls. Hence only a draft.Now rebased on #108, using the samestruct Frameidea.