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Re: [Xen-devel] XEN) vmx.c:2652:d1 Bad vmexit (reason 31) with Xen 4.0.1

To: Jan Beulich <JBeulich@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] XEN) vmx.c:2652:d1 Bad vmexit (reason 31) with Xen 4.0.1-rc7-pre (cs/ 23029)
From: Keir Fraser <keir.xen@xxxxxxxxx>
Date: 2011年3月18日 15:31:32 +0000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: 2011年3月18日 08:32:15 -0700
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Thread-topic: [Xen-devel] XEN) vmx.c:2652:d1 Bad vmexit (reason 31) with Xen 4.0.1-rc7-pre (cs/ 23029)
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On 18/03/2011 07:55, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:
>> Exit reason 31 is EXIT_REASON_MSR_READ. I don't see how that error can ever
>> be printed for that exit reason. Could you do a bit of digging and see if
>> you agree? The logic is straightforward enough -- the error comes from a
>> default case in a switch statement, but the switch does explicitly handle
>> EXIT_REASON_MSR_READ. There is also a exit_and_crash label for the default
>> case, but EXIT_REASON_MSR_READ doesn't goto it afaics. So this is a weird
>> and inexplicable bug, to me. :-)
>
> No, the reason is printed in hex
Grrr! I'll add the '0x' prefix.
 -- Keir
> and thus it's EXIT_REASON_EPT_MISCONFIG,
> which isn't being handled in the switch statement (and I can't see
> how it sensibly could be). But the mere register state is insufficient
> to determine what's wrong.
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