[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] Question about RNG virtio device
From: |
Dennis Chen |
Subject: |
[Qemu-devel] Question about RNG virtio device |
Date: |
Mon, 27 Nov 2017 14:58:29 +0800 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
Hello QEMU developers,
We all know that there is a virtio-rng device can be para-virtualised from
the host to guest in case of a real RNG HW exists in the host, my question
is:
Can we get some performance gain to use the 'virtio-rng' device if there isn't
a real RNG HW in host, in this case, what's the default back-end of the virtio
-rng device?
For my scenario, I don't want to use a virtio-rng device if the host doesn't
have
a RNG HW, because the guest will get a fake RNG HW with virtio-rng device (/sys/
devices/virtual/misc/hw_random/rng_current), which is not expected. But if
virtio-rng is not used, I don't know how the guest get the entropy from the
host,
the most concern is performance. IOW, what's the difference between virtio-rng
used
and not if there isn't a RNG HW in host?
Thanks!
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Qemu-devel] Question about RNG virtio device,
Dennis Chen <=