rng-builtin is the new RNG default backend for virtio-rng and is based
on getrandom().
0198c2621a1e virtio-rng: change default backend to rng-builtin
5f7655f6ef15 virtio-rng: Keep the default backend out of VirtIORNGConf
6c4e9d487fea rng-builtin: add an RNG backend that uses qemu_guest_getrandom()
** Changed in: qemu
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1811758
Title:
virtio-rng backend should use getentropy() syscall when available
Status in QEMU:
Fix Committed
Bug description:
According to https://wiki.qemu.org/Features/VirtIORNG the default
backend for `virtio-rng-pci` is `/dev/random`. Alternately, the user
can point it to a different backend file, like `/dev/urandom`.
However, both of these files have suboptimal behavior in one way or
another, as documented in `random(7)`. Instead, the default behavior
should be to pull the requested octets from the `getrandom()` system
call, if available, called with no flags set.
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