Messages in this thread | | | From | Christian Borntraeger <> | Subject | Re: Virt RNG? | Date | Thu, 15 May 2008 22:31:56 +0200 |
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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. As it transfers only 4 byte per hypercall it is not mindblowingly fast, but I guess it is fast enough.
Dont know why it never hit mainline.
Christian
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