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From: Julian Stecklina <jsteckli@os.inf.tu-dresden.de>
Subject: Re: KVM Clock
Date: Wed, 15 Jan 2014 13:05:19 +0100
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On 01/14/2014 05:13 PM, Peter Grehan wrote:
> Hi Julian,
>=20
>> is anyone working on KVM clock support for FreeBSD? If not, I might ta=
ke
>> a shot at it.
>=20
>  None I know of: go for it :)

Works for me so far:
https://github.com/blitz/freebsd/commit/cdc5f872b3e48cc0dda031fc7d6bdedc6=
5c3148f

If anyone wants to test this, use any recent qemu with KVM:
wget http://os.inf.tu-dresden.de/~jsteckli/tmp/mfsbsd-kvmclock.iso
qemu-kvm -m 1024 -cdrom mfsbsd-kvmclock.iso.

and watch for

KVM-style paravirtualized clock detected.
Timecounter "KVMCLOCK" frequency 1000000000 Hz quality 1000

in the kernel log.

Julian



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