From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: [PATCH]Fix the bug of guest os
	installationfailure and win2k boot failure
Date: Mon, 17 Mar 2008 11:20:53 +0000
Message-ID: <C4040495.1E040%keir.fraser@eu.citrix.com>
References: <FE7BBCFBB500984A9A7922EBC95F516EF337BA@pdsmsx414.ccr.corp.intel.com>
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To: "Cui, Dexuan" <dexuan.cui@intel.com>, "Xu, Dongxiao" <dongxiao.xu@intel.com>, xen-devel@lists.xensource.com
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On 17/3/08 11:16, "Cui, Dexuan" <dexuan.cui@intel.com> wrote:

>> I think you misunderstand. The shadow emulator *never* emulates I/O
>> port accesses or exception deliveries. Those callback functions are
>> simply not implemented and are left as NULL.
> Those callback functions -- what are they? -- do you mean the following?
> static struct x86_emulate_ops hvm_emulate_ops = {
>     ....
>     .read_io       = hvmemul_read_io,
>     .write_io      = hvmemul_write_io,
> ...
> };

Yes indeed. Also, crucially, .inject_hw_exception. Without that
x86_emulate() is unable to inject any exception into the guest, and will
instead return X86EMUL_UNHANDLEABLE.

 -- Keir