[DRAFT] RVH-tests

[NicolasDerumigny]

First draft of our RVH testing c-test suite, implemented in verif/tests/custom/rvh and triggered by verif/regress/hypervisor-tests-cv64a6_imafdch_sv39.sh.

It features:

• paging tests in host mode (S-mode)
• paging tests in host mode (U-mode)
• paging tests in virtual mode (VS-mode), both at hgatp and vsatp level (guest and host page table)

This is by far not exhaustive of all H-Mode quirks, and is only SV39 (64-bit) compliant.

cva6.py, Makefile, ariane_testharness.sv, ariane_tb.cpp and various project files were modified to:

• execute prints from the verilator harness: a from_host value is added along with the to_host, to answer on syscall completion. This requires CBO operations and HPDCache to ensure that the cache do not interfere on read/writes to these values.
• explicitly support/show hart id (not very relevant here, but we use it on our fork).
• allow diff of the output print between spike and verilator (with an additional option to cva6.py).
• allow diff between verilator and a reference file containing regular expressions (unused in this PR) (with an additional option to cva6.py).
• add a --no-ecall-exit-marker as ecalls seem to trigger exits on one tool (VCS?) but are required in our H-Mode test suite.

Also:

• verible-format was run on ariane_testharness.sv, resulting in alignment changes.
• VS-mode tests require fix: no error on h-mode SV39x4 translation #3221 to pass

The goal of this PR is to know what need to be kept, what breaks the current CI and what should be saved for final merge, as discussed in last weekly meeting.

[cainria]

Please convert your PR to a Draft PR (below the list of reviewers in the right column of this page). It will prevent from an accidental merge.

[github-actions]

👋 Hi there!

This pull request seems inactive. Need more help or have updates? Feel free to let us know. If there are no updates within the next few days, we'll go ahead and close this PR. 😊