Re: [Xen-devel] [RFC] Hypervisor RNG and enumeration

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On 10/29/2014 02:57 PM, David Vrabel wrote:
> Microsoft already has a specification to obtain a random number via an
> ACPI device.  The VM Generation ID.
> 
> http://www.microsoft.com/en-us/download/details.aspx?id=30707

That's a very different thing.  The VM Generation ID always returns the
same number if you run the VM from the same configuration file.

It tells the VM when it might need a reseed, but provides neither a best
effort random number like this spec does, nor an entropy source like
virtio-rng does.

Paolo
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