Date: Thu, 22 Oct 2015 22:17:18 -0700 From: Peter Grehan <peterg@ptree32.com.au> To: Cory Smelosky <corys@ixsystems.com>, freebsd-virtualization@freebsd.org Subject: Re: Issues with bhyve under KVM Message-ID: <5629C2DE.4040908@ptree32.com.au> In-Reply-To: <941285e78b5cd6a3a9283ef1f0068893@ixsystems.com> References: <061b9d92bf351baa9263279e86513861@ixsystems.com> <78cd6c472dfa583c81442d766e620bf7@ixsystems.com> <56287F01.7060308@freebsd.org> <941285e78b5cd6a3a9283ef1f0068893@ixsystems.com>
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Hi Cory,
>> bhyve expects that the CPU supports INS/OUTS exits. This is signalled
>> in bit 54 of the VMX_BASIC MSR. I'll have a talk with Neel about the
>> implications of ignoring this bit.
>
> Hmm. Does Linux KVM ignore it?
It must do (as did bhyve for a long time).
> (does -host not emulate all MSRs?)
Probably just not that bit. You might want to try the this patch which
comments out that test, and see if it gets you any further.
https://people.freebsd.org/~grehan/patches/vmx_ins.diff
later,
Peter.
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