From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: Registers need to recover when emulating L2 vmexit
Date: Mon, 8 Jul 2013 20:18:37 +0300
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Cc: kvm <kvm@vger.kernel.org>, Paolo Bonzini <pbonzini@redhat.com>,
	Jan Kiszka <jan.kiszka@web.de>
To: Arthur Chunqi Li <yzt356@gmail.com>
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On Mon, Jul 08, 2013 at 07:50:45PM +0800, Arthur Chunqi Li wrote:
> Hi Gleb and Paolo,
> >From current KVM codes, when L2 cause VMEXIT or L1 fails to enter L2,
> host VMX will execute nested_vmx_vmexit() and
> nested_vmx_entry_failure(). Both of them calls
> load_vmcs12_host_state() which loads vmcs12's HOST fields as vmcs01's
> GUEST fields. But the HOST and GUEST fields are not accurately
> correspondence, e.g. GUEST_CS/ES..._BASE/LIMIT/AR. What will these
> MSRs be set?
> 
This is not MSRs, but VMCS field. Currently they are set to whatever
value they had in vmcs01 when L1 executed VMLAUNCH, but this is
incorrect. They should be set according to section 27.5.2
"Loading Host Segment and Descriptor-Table Registers" of SDM.

--
			Gleb.