68  * (Entropy harvesting only round robins across active pools.)
81  * Low sources provide unconditioned entropy, such as mouse movements; high
232 /* For special behavior on first-time entropy sources. (§ 3.1) */
235 /* For special behavior for high-entropy sources after a reseed. (§ 3.4) */
239 /* Entropy pools.  Lock order is ENT -> RNG(root) -> RNG(leaf). */
241 MTX_SYSINIT(fx_pool, &fxent_pool_lk, "fx entropy pool lock", MTX_DEF);
252  * Track number of bytes of entropy harvested from high-quality sources prior
253  * to initial keying.  The idea is to collect more jitter entropy when fewer
261  * Jitter entropy is unimplemented for now.
281  * A racy check that this high-entropy source's event should contribute to
289  *     • False negative: We still collect the entropy; it just won't be
300  * Top level entropy processing API from randomdev.
302  * Invoked by the core randomdev subsystem both for preload entropy, "push"
319 	 * Zero bytes of source entropy doesn't count as observing this source  in fxrng_event_processor()
320 	 * for the first time.  We still harvest the counter entropy.  in fxrng_event_processor()
326 		 * "The first time [any source] provides entropy, it is used to  in fxrng_event_processor()
327 		 * directly reseed the root PRNG.  The entropy pools are  in fxrng_event_processor()
335 		 * the entropy directly with the root PRNG state, as the root  in fxrng_event_processor()
337 		 * entropy in pool0 and do not bump the root PRNG seed version  in fxrng_event_processor()
342 		 * entropy sources.  We use the root BRNG to generate 32 bytes  in fxrng_event_processor()
343 		 * and use fxrng_hash to mix it with the new entropy source and  in fxrng_event_processor()
359 		 * initial keying without this entropy.  in fxrng_event_processor()
380 	 * "The first 32 bytes produced by a high entropy source after a reseed  in fxrng_event_processor()
419 		 * take the last rem bytes of the entropy buffer and leave the  in fxrng_event_processor()
420 		 * timecounter to be round-robin'd with the remaining entropy.  in fxrng_event_processor()
520 	 * Collect entropy from pools 0..n-1 by concatenating the output hashes  in fxent_timer_reseed_npools()
536 	 * "The first 32 bytes produced by a high entropy source after a reseed  in fxent_timer_reseed_npools()
569 		 * The creation of entropy pools beyond 0 is enabled when the  in fxent_timer_reseed()