linux-kernel - Re: KVM Nested L2 guest startup problems

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Date:	Fri, 02 May 2014 14:39:18 -0400
From:	Bandan Das <bsd@...hat.com>
To:	Hu Yaohui <loki2441@...il.com>
Cc:	Paolo Bonzini <pbonzini@...hat.com>, kvm <kvm@...r.kernel.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: KVM Nested L2 guest startup problems

Hu Yaohui <loki2441@...il.com> writes:

> On Fri, May 2, 2014 at 11:52 AM, Paolo Bonzini <pbonzini@...hat.com> wrote:
>> Il 02/05/2014 17:17, Hu Yaohui ha scritto:
>>
>>> Hi Paolo,
>>> I have tried L0 with linux kernel 3.14.2 and L1 with linux kernel 3.14.2
>>> L1 QEMU qemu-1.7.0
>>> L2 QEMU qemu-1.7.0.
>>
>>
>> Do you mean L0 and L1?
> Yes.
>>
>> What is your QEMU command line, and what is the processor?  Also, what guest
>> you are running?
>>
> L0 host
> - Debian 7 with linux kernel 3.14.2
> - 24 pCPU, 120G pMEM
> - cpu mode: Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz

Ivy Bridge-EP ? Looks similar to 
https://bugzilla.kernel.org/show_bug.cgi?id=73331

Just out of curiosity, any difference if you run with ept=0 ?

> - QEMU command line of L1
> $ sudo qemu-system-x86_64 -machine accel=kvm -drive
> file=vdisk.img,if=virtio -m 4096 -smp 10 -net
> nic,model=virtio,macaddr=52:54:00:12:34:80 -cpu kvm64,+vmx -net
> tap,ifname=qtap0,script=no,downscript=no -vnc :2
>
> L1 guest
> - Ubuntu 10.04 with linux kernel 3.14.2
> - QEMU command line of L2
> $qemu-system-x86_64  -machine accel=kvm -smp 2 -boot c -drive
> file=/home/nested/vmdisks/vdisk1-virtnet.img,if=virtio -m 2048 -vnc :4
> -net nic,model=virtio,macaddr=52:54:00:12:34:90 -net
> tap,ifname=qtap0,script=no,downscript=no
>
> L2 guest
> - Ubuntu 10.04 with linux kernel 2.6.32
>> Paolo
>>
>>
>>> I still get the same error when running qemu in L1 guest.
>>
>>
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