RE: [PATCH v9 09/17] x86/split_lock: Handle #AC exception for split lock

David Laight
2019-10-16T14:14:54Z

For the smt case, can you make #AC enable a property of the process?
Then disable it on the core if either smt process requires it be disabled?

This would mean that is a 'mixed environment' not all split accesses
would actually generate #AC - but enough would to detect broken code
that doesn't have #AC explicitly disabled.

I'm not sure you'd want a guest to flip #AC enable based on the process
it is scheduling, but it might work for the base metal scheduler.

David

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