[PATCH 3/3] KVM: PPC: Book3S: Add support for hwrng found on some powernv systems
Benjamin Herrenschmidt
benh at au1.ibm.com
Thu Oct 3 07:58:32 EST 2013
On Wed, 2013-10-02 at 11:11 +0200, Alexander Graf wrote:
> Right, and the difference for the patch in question is really whether
> we handle in in kernel virtual mode or in QEMU, so the bulk of the
> overhead (kicking threads out of guest context, switching MMU
> context, etc) happens either way.
>
> So the additional overhead when handling it in QEMU here really boils
> down to the user space roundtrip (plus another random number read
> roundtrip).
Hrm, Michael had a real mode version ... not sure where it went then.
Cheers,
Ben.
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