Status at a glance:
Scalar Crypto Specification:
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)
Image Modified
Pub
Architecture & Opcode consistency review
- The results of the review can be seen here. Scalar Crypto Arch Review Results.pdf
- After discussion within the task group, the following changes will be made to the spec, with the changes expected to land in 0.9.4 before the end of August.
- Stop overlapping the aes32 and aes64 opcodes. See riscv/riscv-opcodes#77
- Clarify the effect of misa.k
- Some updates to the entropy source and zkt detailed here.
- Miscellaneous editorial issues.
- Some downstream tasks for our group development partners once 0.9.4 lands:now we are in public review.
| Who | What | Status | Task |
|---|
| PLCT | GCC | Not started | Update extension names: Zkb → Zbkb etc. |
| PLCT |
LLVM| GCC | Not started | Update aes32/64* encodings if applicable. |
| PLCT |
GCCNot started| Done | Update extension names: Zkb → Zbkb etc. |
| PLCT |
LLCMNot started| Done | Update aes32/64* encodings if applicable. |
| IIT | riscv-config | Not started | Update extension names: Zkb → Zbkb etc. |
| IIT | riscv-config | Not started | Update instruction inclusion in different extensions |
| IIT | riscv-arch-tests | Not started | Break up K suite into Zk* extensions |
| IIT | riscv-arch-tests | Not started | Update instruction inclusion in different extensions |
Architecture Tests
- 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.
- 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.
- Update from IIT Madras as on 25-Oct
- 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.
...
- Experimental / development toolchain available in the riscv-crypto repository.
- This cannot be up-streamed, but can be used for development work for now.
- Intrinsics proposal from Markku
- PLCT lab have developed complete Binutils and GCC patches.
- The pull requests into the main RISC-V repos can be found here:
- The PLCT lab continuous integration server can be found here:
- Some small changes will be needed as we move to v1.0 of scalar crypto around encodings.
LLVM
- Work will be done by PLTC PLCT lab under the group contributor model.
- Slides from PLCT Update Weds 10'th Feb
- As of 21'st April '21, LLVM work is mostly complete, waiting on PLCT lab for an update about merging things upstream.
- Some small changes will be needed as we move to v1.0 of scalar crypto around encodings.
- As of 24'st Jan '22, LLVM upstream is able to compile the assembly code of Zk* and Zbk*
Simulators
Though all listed under "simulators", these are actually a collection of formal model / virtual machine / architectural simulators / DV simulators etc.
...
- Currently working on getting support merged in upstream in PR#99
Spike
- Upstream support has been merged in.
- Instructions are up to date with v0v1.90.4.
- Entropy source PR for v0.9.4 is here.
- 0
riscvOVPSimPlus
- Imperas Commercial Simulator
- Freeware version
- Support forSupports:.81
- .8.1, 0.9.0, 0.9.2, 1.0.0-rc1, + Bitmanip subsets
- Bitmanip 0.90, 0.91, 0.92, 0.93-draft, 0.93, 0.94, 1.0.0
- Functional coverage collection.
QEMU
- Work will be done by PLTC PLCT lab under the group contributor model.
...