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Open question: can there be multiple RNG instances?

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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
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Gilles Peskine 2020-11-18 15:44:12 +01:00
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docs/proposed/psa-driver-interface.md
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@ -929,6 +929,12 @@ Should the input to the [`"add_entropy"` entry point](#entropy-injection) be a f
Are the [entropy collection flags](#entropy-collection-flags) well-chosen? Are the [entropy collection flags](#entropy-collection-flags) well-chosen?
#### Random generator instantiations
May the core instantiate a random generation context more than once? In other words, can there be multiple objects of type `acme_random_context_t`?
Functionally, one RNG is as good as any. If the core wants some parts of the system to use a deterministic generator for reproducibility, it can't use this interface anyway, since the RNG is not necessarily deterministic. However, for performance on multiprocessor systems, a multithreaded core could prefer to use one RNG instance per thread.
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