From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: KVM: nested VMX: disable perf cpuid reporting
Date: Mon, 22 Sep 2014 16:01:03 -0300
Message-ID: <20140922190103.GA2349@amt.cnet>
References: <20140918212457.GA9227@amt.cnet>
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Cc: Gleb Natapov <gleb@kernel.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Bandan Das <bsd@redhat.com>,
	Nadav Amit <namit@cs.technion.ac.il>
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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?