Direct data copy between normal-world shared memory and TA memory

[Sangho Lee (sangho2)]

This PR lets LiteBox/LVBS secure kernel directly copy data between normal-world shared memory and TA memory without relying on kernel-owned bounce buffers. It does not harm our security guarantee because source and destination addresses as well as their data sizes are tightly checked. It still ensures that TAs never directly access normal-world memory.

[Sangho Lee (sangho2)]

A sequel of #1257. Issue #1138.

[github-actions]

🤖 SemverChecks 🤖 ⚠️ Potential breaking API changes detected ⚠️

Click for details

--- failure constructible_struct_adds_field: struct exhaustively constructible through public API adds field ---

Description:
A pub struct that could be exhaustively constructed with a literal using only public API has a new pub field, breaking existing exhaustive literals.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.50.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field TaRequestInfo.shm_info in /home/runner/work/litebox/litebox/litebox_shim_optee/src/msg_handler.rs:395

--- failure function_parameter_count_changed: pub fn parameter count changed ---

Description:
A publicly-visible function now takes a different number of parameters.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#fn-change-arity
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.50.0/src/lints/function_parameter_count_changed.ron

Failed in:
  litebox_shim_optee::msg_handler::update_optee_msg_args now takes 7 parameters instead of 6, in /home/runner/work/litebox/litebox/litebox_shim_optee/src/msg_handler.rs:581

--- failure struct_pub_field_missing: pub struct's pub field removed or renamed ---

Description:
A publicly-visible struct has at least one public field that is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.50.0/src/lints/struct_pub_field_missing.ron

Failed in:
  field out_shm_info of struct TaRequestInfo, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/8f8a86a219ba047149e68790a4a12116323e24ad/litebox_shim_optee/src/msg_handler.rs:396

[Weidong Cui (wdcui)]

LGTM. Thanks.