Use physical pointer abstraction in LVBS

[sangho2]

This PR lets LVBS use physical pointer abstraction to access VTL0 memory. This is equivalent to the OP-TEE shim's normal-world memory access such that it is not only safer than the legacy memory copy functions but also supporting non-contiguous physical pages. This PR and physical address range lock (next PR) will enable memory-safe VTL0 memory access (i.e., drop unsafe from read/write methods).

[wdcui]

Add a comment for this trait method?

[sangho2]

This is just a proxy. Let me add a link to

litebox/litebox_common_linux/src/vmap.rs

Line 53 in ca99ea2

fn validate_unowned(&self, _pages: &PhysPageAddrArray<ALIGN>) -> Result<(), PhysPointerError> {

[wdcui]

We use both Vtl0 and NormalWorld?

[sangho2]

Yes. It depends on context LVBS/HVCI/HEKI vs OP-TEE.

[github-actions]

🤖 SemverChecks 🤖 ⚠️ Potential breaking API changes detected ⚠️

Click for details

--- failure feature_missing: package feature removed or renamed ---

Description:
A feature has been removed from this package's Cargo.toml. This will break downstream crates which enable that feature.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#cargo-feature-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/feature_missing.ron

Failed in:
  feature optee_syscall in the package's Cargo.toml

--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn 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/v0.47.0/src/lints/inherent_method_missing.ron

Failed in:
  LinuxKernel::copy_from_vtl0_phys, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_platform_lvbs/src/lib.rs:750
  LinuxKernel::copy_to_vtl0_phys, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_platform_lvbs/src/lib.rs:790
  LinuxKernel::copy_slice_to_vtl0_phys, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_platform_lvbs/src/lib.rs:825
  LinuxKernel::copy_slice_from_vtl0_phys, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_platform_lvbs/src/lib.rs:860

--- failure module_missing: pub module removed or renamed ---

Description:
A publicly-visible module cannot be imported by its prior path. A `pub use` may have been removed, or the module may have been renamed, removed, or made non-public.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/module_missing.ron

Failed in:
  mod litebox_shim_optee::ptr, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_shim_optee/src/ptr.rs:4

--- failure struct_missing: pub struct removed or renamed ---

Description:
A publicly-visible struct cannot be imported by its prior path. A `pub use` may have been removed, or the struct itself 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/v0.47.0/src/lints/struct_missing.ron

Failed in:
  struct litebox_shim_optee::ptr::PhysMutPtr, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_shim_optee/src/ptr.rs:112
  struct litebox_shim_optee::NormalWorldMutPtr, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_shim_optee/src/ptr.rs:112
  struct litebox_shim_optee::ptr::PhysConstPtr, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_shim_optee/src/ptr.rs:496
  struct litebox_shim_optee::NormalWorldConstPtr, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/9b32e257edc7c69db649c183b89a402e2ca2cdf2/litebox_shim_optee/src/ptr.rs:496