Change Details

Upstream DTB don't provide IRQ for RNG. Even if it did, on RPI3 the interrupt is called way too often than necessary: it was acknowledged on #bsdmips with security and rng experts that feeding 16 bytes of data every 4 seconds was enough. For these reasons, get rid of the interrupt mode and make callout mode the default, with random bits harvested every 4 seconds.

Upstream DTBs don't provide IRQ lines for the RNG. Even if they did, harvesting bytes as often as the RNG interrupt is triggered seems overkill: it was acknowledged on #bsdmips with security and RNG experts that feeding 16 bytes of randomness every 4 seconds was enough. For these reasons, get rid of the interrupt mode and make callout mode the default, with random bits harvested every 4 seconds.

Upstream DTBs don't provide IRQ lines for the RNG. Even if itthey did, on RPI3 the interrupt is called way too often than necessary:harvesting bytes as often as the RNG interrupt is triggered seems overkill: it was acknowledged on #bsdmips with security and rngRNG experts that feeding 16 bytes of datarandomness every 4 seconds was enough. For these reasons, get rid of the interrupt mode and make callout mode the default, with random bits harvested every 4 seconds.