pass-through hwrng

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hi all

I have in my centos 7 this:

crw-------. 1 root root 10, 183 Oct 11 21:28 /dev/hwrng

and VM  fails, complains like this:

virsh # start volatile-work6
error: Failed to start domain volatile-work6
error: internal error: process exited while connecting to monitor: 2016-10-19T09:42:05.988142Z qemu-kvm: -object rng-random,id=objrng0,filename=/dev/hwrng: Could not open '/dev/hwrng': Permission denied

which reads logical. Now - is this normal that hwrng is created with these permissions?
And if yes then how to pass-through it to the VMs?
How to aid VMs with hardware random numbers generator?

many thanks.
L

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