* about memory protection.
@ 2010-07-25 15:07 吴忠远
2010-07-25 19:43 ` Avi Kivity
0 siblings, 1 reply; 2+ messages in thread
From: 吴忠远 @ 2010-07-25 15:07 UTC (permalink / raw)
To: kvm
i want to set some page of guest wrie protection so that the guest can
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 ?
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: about memory protection.
2010-07-25 15:07 about memory protection 吴忠远
@ 2010-07-25 19:43 ` Avi Kivity
0 siblings, 0 replies; 2+ messages in thread
From: Avi Kivity @ 2010-07-25 19:43 UTC (permalink / raw)
To: 吴忠远; +Cc: kvm
On 07/25/2010 06:07 PM, 吴忠远 wrote:
> i want to set some page of guest wrie protection so that the guest can
> 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=1 even if the guest clears it, so write protection
from the host works.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-07-25 15:07 about memory protection 吴忠远
2010-07-25 19:43 ` Avi Kivity
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