From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: guest attempted write to read-only memory page.
Date: Mon, 22 Dec 2008 10:33:03 +0000
Message-ID: <C5751D5F.207C2%keir.fraser@eu.citrix.com>
References: <0A882F4D99BBF6449D58E61AAFD7EDD603BB49CB@pdsmsx502.ccr.corp.intel.com>
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To: "Tian, Kevin" <kevin.tian@intel.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Cc: 'Akio Takebe' <takebe_akio@jp.fujitsu.com>
List-Id: xen-devel@lists.xenproject.org

On 22/12/2008 10:12, "Tian, Kevin" <kevin.tian@intel.com> wrote:

> I guess it's caused by 18931 to update rombios to latest bochs
> version, and some writes to rom area are added outside of disabling
> rom write access. But I'm not familiar with this part, and thus hope
> others (Akio?) may take a deeper dive.

Etherboot likes to try to write to its ROM area. That's why I actually
silenced the warning in __hvm_copy(). I would guess the reason you see this
issue now is because the accesses are taking the shadow-fault path, which
means you are no longer emulating real mode? ;-)

Possibly we should silence the shadow code too, at least perhaps while in
real mode or for a certain EIP range.

 -- Keir