From: Dor Laor <dor.laor@qumranet.com>
To: "Yang, Sheng" <sheng.yang@intel.com>
Cc: kvm@vger.kernel.org, Martin Michlmayr <tbm@cyrius.com>
Subject: Re: kvm: Unknown error 524, Fail to handle apic access vmexit
Date: Wed, 16 Jul 2008 16:42:10 +0300 [thread overview]
Message-ID: <487DFAB2.8000704@qumranet.com> (raw)
In-Reply-To: <200807161126.37615.sheng.yang@intel.com>
Yang, Sheng wrote:
> On Tuesday 15 July 2008 23:19:07 Dor Laor wrote:
>
>> Martin Michlmayr wrote:
>>
>>> I installed a Windows XP SP2 guest on a Debian x86_64 host The
>>> installation itself went fine but kvm aborts when when XP starts
>>> during "Windows XP Setup". XP mentions something with
>>> intelppm.sys (see the attached screenshot) and kvm says:
>>>
>>> kvm_run: Unknown error 524
>>> kvm_run returned -524
>>>
>> It's a FlexPriority bug, while it should be solved, you can disable
>> it by using kvm-intel module parameter.
>>
>>
>
> Dor, are you sure it's a FlexPriority bug?
>
>
Well, I'm not sure it's the FlexPriority's fault, it's just when it is
disabled it does not happen and I saw the apic
access. It can be miss emulation too.
It happened to me on ~ kvm-69
> If you look at where is the complain, you would find there is a result
> of emulate_instruction().
>
> And you will find a clearly "emulation failed (mmio) rip 7cb3d000 ff
> ff 8d 85" in the bug tracker Martin metioned above the "Fail to
> handle apic access vmexit! Offset is 0xf0"(Spurious Interrupt Vector
> Register).
>
> I don't think "ff ff 8d 85" is a vaild opcode for that case.
>
> Maybe it's a regression? The last report is long ago...
>
> Hi Martin, can you show more dmesg here? And if it can be reproduce
> stable?
>
> Thanks.
>
>
prev parent reply other threads:[~2008-07-16 13:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-15 12:42 kvm: Unknown error 524, Fail to handle apic access vmexit Martin Michlmayr
2008-07-15 15:19 ` Dor Laor
2008-07-16 3:26 ` Yang, Sheng
2008-07-16 12:38 ` Martin Michlmayr
2008-08-06 20:14 ` Martin Michlmayr
2008-07-16 13:42 ` Dor Laor [this message]
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