From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: KVM: nested VMX: disable perf cpuid reporting
Date: Mon, 22 Sep 2014 21:16:16 +0200
Message-ID: <54207580.2060303@redhat.com>
References: <20140918212457.GA9227@amt.cnet> <20140922190103.GA2349@amt.cnet>
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Cc: Gleb Natapov <gleb@kernel.org>, Bandan Das <bsd@redhat.com>,
	Nadav Amit <namit@cs.technion.ac.il>
To: Marcelo Tosatti <mtosatti@redhat.com>,
	kvm-devel <kvm@vger.kernel.org>
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Il 22/09/2014 21:01, Marcelo Tosatti ha scritto:
> On Thu, Sep 18, 2014 at 06:24:57PM -0300, Marcelo Tosatti wrote:
>>
>> Initilization of L2 guest with -cpu host, on L1 guest with -cpu host 
>> triggers:
>>
>> (qemu) KVM: entry failed, hardware error 0x7
>> ...
>> nested_vmx_run: VMCS MSR_{LOAD,STORE} unsupported
>>
>> Nested VMX MSR load/store support is not sufficient to 
>> allow perf for L2 guest.
>>
>> Until properly fixed, trap CPUID and disable function 0xA.
>>
>> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
> 
> Ping, Paolo?
> 

Sorry, didn't push to kvm/queue but I've already applied the patch
locally.  I will do it first thing tomorrow (my workstation is off right
now so I cannot send you a SHA).

Paolo