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Subject: Re: Issues with GTX960 on CentOS7 using bhyve PCI passthru (FreeBSD
 11-RC2)
To: Dom <misc-freebsd@talk2dom.com>, soralx@cydem.org
References: <20170110003332.7cf8ba15@mscad14>
 <0de7e0fe-5680-b1be-bd57-6bf446c2fd38@talk2dom.com>
 <0c927784-3e3f-7946-fba9-c25001f4156c@talk2dom.com>
 <20170110180117.7f246b5a@mscad14>
 <75abdb83-8902-1c6e-e881-5af24e5bba05@talk2dom.com>
Cc: freebsd-virtualization@freebsd.org
From: Peter Grehan <grehan@freebsd.org>
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Date: Wed, 11 Jan 2017 14:04:14 -0800
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Hi,

>>> There doesn't seem to be support for CPUID 0x40000001 in bhyve either.
>> What is it supposed to do?
>
> As far as I can tell it's the Hypervisor extension flags list. The lack
> of these extensions/optimisations might explain why your FreeBSD VM runs
> slow but their presence also causes the nVidia driver to refuse to run.

  That leaf is KVM-only. bhyve doesn't have any additional hypervisor 
leaves beyond 0x4000000

  (the spec for this is https://lwn.net/Articles/301888/)

later,

Peter.