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From: Avi Kivity <avi@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: "deshantm@gmail.com" <deshantm@gmail.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: Nested KVM
Date: Tue, 23 Dec 2008 19:05:22 +0200	[thread overview]
Message-ID: <49511A52.3000906@redhat.com> (raw)
In-Reply-To: <C0EE1EE1-81F1-4DED-83E3-EB4AB9CF52A5@suse.de>

Alexander Graf wrote:
>
>> I have successfully built the latest kvm, kvm-userspace from git.
>>
>> I loaded the kvm_amd module with the nested=1 option.
>>
>> The kvm guest that I am working with has an older version
>> of kvm (Ubuntu 8.10 + kvm package) and during boot I get:
>>
>> [   23.673107] Pid: 4278, comm: modprobe Tainted: G S        
>> 2.6.27-7-generic #1
>> [   23.673107] RIP: 0010:[<ffffffff8022d35a>]  [<ffffffff8022d35a>]
>> native_write_msr_safe+0xa/0x10
>> [   23.673107] RSP: 0018:ffff880018dc3dd8  EFLAGS: 00010002
>> [   23.673107] RAX: 0000000000001d01 RBX: ffff880018dc3e04 RCX: 
>> 00000000c0000080
>>
>> Maybe it is just that a newer version of KVM is needed?
>>
>> I will also try to build a newer version of KVM and test.
>>
>> Thanks for any comments.
>
> Your guest is writing to an MSR that is unknown to the kvm msr 
> emulation. What does dmesg on the host say?
>

You can actually see that it's writing to EFER (rcx = 0xc00000080).  But 
that should always be implemented on AMD.  It's probably complaining 
about the svme bit, but that can only happen if nested=0?

-- 
error compiling committee.c: too many arguments to function


  parent reply	other threads:[~2008-12-23 17:05 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-23  2:55 Nested KVM Todd Deshane
2008-12-23  6:26 ` Todd Deshane
2008-12-23  9:00 ` Alexander Graf
2008-12-23 16:35   ` Todd Deshane
2008-12-23 17:04     ` Alexander Graf
2008-12-24  4:18       ` Todd Deshane
2008-12-24  9:20         ` Alexander Graf
2008-12-25  9:59           ` Avi Kivity
2008-12-25 13:49             ` Alexander Graf
2008-12-29 23:47           ` Todd Deshane
2008-12-30 17:19             ` Todd Deshane
2008-12-31 15:17               ` Alexander Graf
2008-12-23 17:05   ` Avi Kivity [this message]
2008-12-23 17:10     ` Alexander Graf
2008-12-23 17:18       ` Avi Kivity

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