Christian Borntraeger wrote: > Am Donnerstag, 15. Mai 2008 schrieb Jeff Garzik: >> Has anyone yet written a "hw" RNG module for virt, that reads the host's >> random number pool? >> >> All this talk[1] about IRQF_SAMPLE_RANDOM in network drivers reminds me >> that virt guest instances should be grabbing random numbers from the >> host, especially if the host has a hardware RNG. > > Yes, there was a drivers/char/hw_random/virtio-rng.c in Rusty's lguest > repository. > http://www.mail-archive.com/virtualization%40lists.linux-foundation.org/msg02902.html > > I have tested this driver with this fix > https://lists.linux-foundation.org/pipermail/virtualization/2008-January/009737.html > and it worked. Nice! > As it transfers only 4 byte per hypercall it is not mindblowingly fast, but I > guess it is fast enough. A limitation of the hw-random API. However, I'd say the virtio rng driver could (and should) buffer bigger chunks, say at least a cacheline's worth of data, to return via hw-random's 32-bit data request API. Jeff _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
