Re: nothing contributing entropy in Xen domUs? (causing python3.7 rebuild to get stuck in kernel in "entropy" during an "import" statement)

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Mar 31, 2021 at 09:58:48PM -0400, Thor Lancelot Simon wrote:
> On Wed, Mar 31, 2021 at 11:24:07AM +0200, Manuel Bouyer wrote:
> > On Tue, Mar 30, 2021 at 10:42:53PM +0000, Taylor R Campbell wrote:
> > > 
> > > There are no virtual RNG devices on the system in question, according
> > > to the quoted `rndctl -l' output.  Perhaps the VM host needs to be
> > > taught to expose a virtio-rng device to the guest?
> > 
> > There is no such thing in Xen.
> 
> Is the CPU so old that it doesn't have RDRAND / RDSEED, or is Xen perhaps
> masking these CPU features from the guest?

Is there an easy way to test, on a netbsd-9 system, if the instruction is
present and working ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--