From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tim Deegan <tim@xen.org>
Subject: Re: make clear a vmexit reason
Date: Thu, 15 Mar 2012 10:05:21 +0000
Message-ID: <20120315100521.GA4798@ocelot.phlegethon.org>
References: <CALchwUegyVgGEZ8WSsh0aJdU-2vC_3zFD64K11GEpY3LLgQcxQ@mail.gmail.com>
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To: YAO <yffbrave@gmail.com>
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At 10:11 +0800 on 15 Mar (1331806261), YAO wrote:
> Hi,
> Lately I was puzzled by a vmexit reason 31 which was defined
> as EXIT_REASON_MSR_READ
> I allocated an array in xen data section and assigned its MFN to an EPT
> entry of a domainU,
> I thought the domU could access this array but after that the domainU
> crashed
> and xen gave me this exit reason "Bad vmexit (reason 31)"
> 
> But there is nothing to do with MSR READ, so I'm confused...
> Can anybody give me a clear explanation?

The error code is printed in hex. :)
(0x31 == 49 == EXIT_REASON_EPT_MISCONFIG)

Tim.