linux-kernel - Re: [PATCH 1/2] KVM: nVMX: Fix nested vmexit ack intr before load vmcs01

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Date:	Tue, 5 Aug 2014 12:48:11 +0800
From:	Wanpeng Li <wanpeng.li@...ux.intel.com>
To:	Davidlohr Bueso <davidlohr@...com>
Cc:	Paolo Bonzini <pbonzini@...hat.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Gleb Natapov <gleb@...nel.org>, Bandan Das <bsd@...hat.com>,
	Zhang Yang <yang.z.zhang@...el.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, freyes@...e.com
Subject: Re: [PATCH 1/2] KVM: nVMX: Fix nested vmexit ack intr before load
 vmcs01

Hi Davidlohr,
On Mon, Aug 04, 2014 at 12:56:36PM -0700, Davidlohr Bueso wrote:
>On Fri, 2014-08-01 at 16:12 +0800, Wanpeng Li wrote:
>> External interrupt will cause L1 vmexit w/ reason external interrupt when L2 is 
>> running. Then L1 will pick up the interrupt through vmcs12 if L1 set the ack 
>> interrupt bit. Commit 77b0f5d (KVM: nVMX: Ack and write vector info to intr_info
>> if L1 asks us to)
>
>So being that 77b0f5d is in 3.15, we need it for -stable.
>
>>  get intr that belongs to L1 before load vmcs01 which is wrong, 
>> especially this lead to the obvious L1 ack APICv behavior weired since APICv 
>> is for L1 instead of L2. This patch fix it by ack intr after load vmcs01.
>> 
>> Signed-off-by: Wanpeng Li <wanpeng.li@...ux.intel.com>
>
>It strikes me that this fixes Felipe's issue:
>http://paste.opensuse.org/view/raw/78752586
>

Could you verify if the latest version also fix your issue? Your Tested-by
to the latest version is appreciated.

Regards,
Wanpeng Li 

>
>
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