Preliminary support "Svinval" Standard Extension #458
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Add supervisor memory-management fence instruction SFENCE.VMA to decoder. The supervisor memory-management fence instruction SFENCE.VMA is used to synchronize updates to in-memory memory-management data structures with current execution. Linux kernel leverage this instruction for synchronization, support emulating this instruction is needed to boot Linux kernel. Since we have only one hart and we have not yet support cache(TLB) in the emulator, the implemention of this instruction is straight forward and it could be further improved in the future. Related: sysprog21#310, sysprog21#438
jserv
reviewed
Jun 16, 2024
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Benchmarks
| Benchmark suite | Current: 809c151 | Previous: f2c8e48 | Ratio |
|---|---|---|---|
Dhrystone |
4.37 Average DMIPS over 10 runs |
7.22 Average DMIPS over 10 runs |
1.65 |
Coremark |
0.004 Average iterations/sec over 10 runs |
0.004 Average iterations/sec over 10 runs |
1 |
This comment was automatically generated by workflow using github-action-benchmark.
|
Thank @ChinYikMing for contributing! |
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Add supervisor memory-management fence instruction SFENCE.VMA to decoder.
The supervisor memory-management fence instruction SFENCE.VMA is used to synchronize updates to in-memory memory-management data structures with current execution. Linux kernel leverage this instruction for synchronization, support emulating this instruction is needed to boot Linux kernel. Since we have only one hart and we have not yet support cache(TLB) in the emulator, the implemention of this instruction is straight forward and it could be further improved in the future.
Related: #310, #438