| commit | 04fe8814cb0203c1c02cbe99a581b8d64327cdcf | [log] [tgz] |
|---|---|---|
| author | Srikrishna Iyer <sriyer@google.com> | Thu Jan 21 22:31:05 2021 -0800 |
| committer | Srikrishna Iyer <46467186+sriyerg@users.noreply.github.com> | Fri Jan 22 15:15:04 2021 -0800 |
| tree | 417f3847d434e49ce9341fb6c6ac6b91a329637e | |
| parent | b51a0329551a141ec307212dcb919a08cdb57252 [diff] |
[DV] Enable cov comp creation iff cov is enabled In our DV base classes (`hw/dv/sv/dv_lib`), the `en_cov` cfg bit is set to 1 by default, for both, the agents and the env. The original motivation for this was to enable coverage-driven stimulus generation. This is something we are not doing at the moment. Even if we decide to do something like that, it can be enabled on a per test / vseq basis. This change sets the `en_cov` bit at the env cfg level to 0 and enables this setting to be retrieved via plusarg in `dv_base_test`. In all env classes, this cfg setting is then passed on the the downstream agent cfg objects. This change is applied to `uvmdvgen` env template as well. In `hw/dv/tools/dvsim/common_modes.hjson` the `+en_cov=1` plusarg is set, so that if coverage collection is enabled, the coverage collection component is created (previously, the coverage component was created regardless of whether the coverage was enabled or not). With this change, simulations run without coverage collection enabled should see roughly 10-30% improvement in runtime, which directly impacts the private CI runtime (which has been inching closer to the 20 min timeout as more DUTs are added to the regression list). Signed-off-by: Srikrishna Iyer <sriyer@google.com>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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