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Re: [Qemu-ppc] [Qemu-devel] [PATCH v3] ppc/spapr: Implement H_RANDOM hyp
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-ppc] [Qemu-devel] [PATCH v3] ppc/spapr: Implement H_RANDOM hypercall in QEMU |
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Date: |
Fri, 11 Sep 2015 05:29:09 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 |
On 09/11/2015 03:17 AM, Thomas Huth wrote:
> The PAPR interface defines a hypercall to pass high-quality
> hardware generated random numbers to guests. Recent kernels can
> already provide this hypercall to the guest if the right hardware
> random number generator is available. But in case the user wants
> to use another source like EGD, or QEMU is running with an older
> kernel, we should also have this call in QEMU, so that guests that
> do not support virtio-rng yet can get good random numbers, too.
>
> This patch now adds a new pseude-device to QEMU that either
s/pseude/pseudo/
> directly provides this hypercall to the guest or is able to
> enable the in-kernel hypercall if available. The in-kernel
> hypercall can be enabled with the use-kvm property, e.g.:
>
> qemu-system-ppc64 -device spapr-rng,use-kvm=true
>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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