From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: about memory protection.
Date: Sun, 25 Jul 2010 22:43:17 +0300
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To: =?UTF-8?B?5ZC05b+g6L+c?= <wzhongyuan@gmail.com>
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  On 07/25/2010 06:07 PM, =E5=90=B4=E5=BF=A0=E8=BF=9C wrote:
> i want to set some page of guest wrie protection so that the guest ca=
n
> not write to this page any more . so i  set the corresponding page
> write protection. but if guest modify cr0 to clear wp bit. what could
> i do to avoid this ?

The host keeps cr0.wp=3D1 even if the guest clears it, so write protect=
ion=20
from the host works.

--=20
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.