From: Anthony Liguori <aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
To: Zachary Amsden <zach-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
Cc: kvm-devel <kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Subject: Re: State of current pv_ops backend for KVM?
Date: Wed, 30 May 2007 13:20:32 -0500 [thread overview]
Message-ID: <465DC070.1020704@us.ibm.com> (raw)
In-Reply-To: <465DBC39.7090308-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
Zachary Amsden wrote:
>> VMI can determine that it's under VMware since VMware has to publish
>> an option ROM. It's quite neat, but overkill for what we're doing
>> (since we're not going to be using a ROM anyway).
>
> The near to being blessed way to do this is to use a CPUID leaf (I
> believe it is 0x40000000) to identify the hypervisor. I don't have
> the exact details, but making CPUID 0x40000000 return 'KVMKVMKVMKVM'
> sounds like a pretty safe detection technique.
I apparently missed the memo :-) I'll update the patch.
Regards,
Anthony Liguori
> We're probably dropping the ROM probing in favor of this for 64-bit.
> Zach
>
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prev parent reply other threads:[~2007-05-30 18:20 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-29 1:54 State of current pv_ops backend for KVM? Anthony Liguori
[not found] ` <465B87CE.6030801-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-05-29 6:11 ` Ingo Molnar
[not found] ` <20070529061128.GA27037-X9Un+BFzKDI@public.gmane.org>
2007-05-29 6:11 ` Ingo Molnar
2007-05-29 11:47 ` Avi Kivity
[not found] ` <465C12C0.9030906-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-29 13:49 ` Anthony Liguori
[not found] ` <465C2F75.3080603-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-05-29 14:00 ` Avi Kivity
[not found] ` <465C31F2.8080007-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-29 14:19 ` Anthony Liguori
[not found] ` <465C3671.9000404-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-05-29 14:28 ` Avi Kivity
2007-05-30 2:35 ` Rusty Russell
[not found] ` <1180492544.30202.72.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-05-30 5:01 ` Avi Kivity
[not found] ` <465D051F.20706-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-30 6:04 ` Rusty Russell
2007-05-30 2:24 ` Rusty Russell
[not found] ` <1180491861.30202.61.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-05-30 2:51 ` Anthony Liguori
[not found] ` <465CE6AD.7000206-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-05-30 18:02 ` Zachary Amsden
[not found] ` <465DBC39.7090308-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-05-30 18:20 ` Anthony Liguori [this message]
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