[chip-test] - chip_sw_rv_core_ibex_double_fault

[engdoreis]

Test point name

chip_sw_rv_core_ibex_double_fault

Host side component

TBD

OpenTitanTool infrastructure implemented

Unknown

Contact person

gac

Checklist

Please fill out this checklist as items are completed. Link to PRs and issues as appropriate.

• [x] Check if existing test covers most or all of this testpoint (if so, either extend said test to cover all points, or skip the next 3 checkboxes)
• [x] Device-side (C) component developed
• [x] Bazel build rules developed
• [x] Host-side component developed
• [x] HJSON test plan updated with test name (so it shows up in the dashboard)
• [ ] Test added to dvsim nightly regression (and passing at time of checking)

Test description

Verify the functionality of the ibex double fault dump.

• Purposely create an ibex double exception during execution, by performing an unmapped read and in the exception handler perform another unmapped read.
• Ensure the rstmgr fault dump correctly captures both dumps correctly and indicates the previous dump is valid.

[tjaychen]

can we double check if this test is a duplicate of this one here?

Or whether the test could be enhanced to satisfy the requirements of both?

[engdoreis]

I beleive it is dublicated. I discussed with @HU90m and we beleive there's room for improvement in the existing chip_sw_rstmgr_cpu_info to cover both chip_sw_rv_core_ibex_fault_dump and chip_sw_rv_core_ibex_double_fault, thats why this issue is still opened.

[tjaychen]

sounds great! so is the plan to directly improve rstmgr_cpu_info for this purpose then?

[HU90m]

Passed three nightly regressions.