Status at a glance:
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Scalar Crypto Specification:
- Latest Draft Scalar Crypto Specification (v0.9.4)
- Contains updates from the architectural review (30/June/2021).
Lightweight instruction set extensions for RV32 and RV64 HARTs. Proposed extensions:
- Extensions fully defined in the Scalar Crypto Specification: Zk, Zkn, Zks, Zkr, Zkne, Zknd, Zknh, Zksed, Zksh, Zkt
- Shared with the Bit-Manipulation Specification: Zbkx, Zbkc, Zbkb
- Instruction Group Names Diagram (click thumbnail for full-size image)
Specification
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Architecture & Opcode consistency review
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- Test plan for the scalar-crypto specific instructions is available.
- Imperas have a complete set of tests, written to the existing test plan, for the scalar crypto instructions and the bitmanip instructions we borrow.
- These have been merged into the main test suite as of PR#177, with many thanks to Imperas for the contribution.
- Spike, OVPSim and Sail all agree on the test signatures.
- They form a base we can use to develop prototype implementations / Spike / SAIL / QEMU very easily and quickly.
- These have been merged into the main test suite as of PR#177, with many thanks to Imperas for the contribution.
- Upstream Spike support for enabling it to work with the K test suite is being added in PR#687.
- IIT Madras are also looking at writing the scalar crypto tests for integration into the official architectural tests repo as well.
- Agreed SoW for IITM
- They are re-implementing the tests as part of the blessed coverage and test generation tooling.
- Making good progress with the simple test patterns for scalar-crypto specific instructions A/O April 7'th '21
- We then switch over to using the IIT tests when they are finished, since they will be easier to maintain/extend going forward than the Imperas tests.
- YAML config changes for K have been merged in. See here.
- Status from IIT Madras as on 17-Jun:
- All test cases and coverage reports has been generated and presented.
- If there are any changes in future on these that is required in future, IIT Madras will enhance the scripts as per requirements.
- Status from IIT Madras as on 20-May:
- Real world test cases as per the test plan has been generated.
- Currently waiting for the fixed toolchain with K extension from PLCT to test the generated test cases. All the test cases are working fine when we run against the patched toolchain
- A PR has been raised with a pull request for this suite to be reviewed and merged in the riscv-arch tests github repo.
- Status from IIT Madras as on 12-May:
- Coverage report for all developed cases in CTG/ISAC has been generated and it is reported as 100%
- Currently real world test cases are being developed as per test plan and will be completed and send for review by beginning of next week
- Status from IIT Madras as on 05-May:
- Resolved issues in running the rv64ik toolchain after interacting with PLCT and compile the relevant tests generated from CTG and run them on spike
- Currently resolving issues in the running the rv64ibk toolchain. Once this is done, will generate the coverage report of the test cases built till now and share with team.
- Status from IIT Madras as on 26-Apr:
- Completed the coverage points specification for all 32-bit and 64-bit instructions
- Generated test cases from the coverage points
- Currently working on trying to install the scalar crypto enabled toolchain.
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- Currently working on getting support merged in upstream in PR#80 PR#99
- Support for all scalar-crypto dedicated instructions is present.Support for and the entropy source is still the main point of discussionpresent.
- No support for Bitmanip. The Bitmanip TG is waiting until after the opcode and consistency review to start writing SAIL code.
This PR is "paused" until the next release of the scalar crypto spec, which will bring some functional changes to the `aes32*` and `sm4*` instructions.
Spike
- Upstream support has been merged in as of PR#635
- Support for all of scalar crypto specific instructions and entropy source.
- The only feature left is to enable the right Bitmanip instructions when K is enabled. Currently, one must include "b" in the spike "–isa=" argument. PR#649 has now been merged. Support now consistent with v0.9.0.
- Instructions are up to date with v0.9.4.
- Entropy source PR for v0.9.4 is here.
riscvOVPSimPlus
- Imperas Commercial Simulator
- Freeware version
- Support for:
- Crypto-scalar v0.7.2, v0.81 + Bitmanip subsets
- Bitmanip 0.92, 0.93
- Functional coverage collection.
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