Fix segfault accessing menvcfg when U-mode doesn't exist #1753
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The simplest fix is to create the CSRs even if they don't need to exist, and just skip adding them to the CSR map to prevent the target machine from being able to access them.
It looks like there are other place we should be following this pattern: e.g. why does sstatus exist if S-mode does not exist? But that's a matter for another day.
Resolves #1752