On 08/30/2010 02:07 PM, cs-jerry** wrote:
> hi all,
> if gpte in guest table was set write protection , the corresponding spte
> in shadow will set be write protection. so any operation in guest trying to
> modify guest page will generate page fault to stop the opetation except on
> condition that the guest set wp bit in cr0. so my question is, how to make
> sure the guest is not able to modify specified page,considering the
> condition that wp bit in cr0 will be set to 0?
> thanks.N‹§²æìr¸›yúèšØb²X¬¶Ç§vØ^–)Þº{.nÇ+‰·¤¾h§¶›¡Ü¨}©ž²Æ
> zÚ&j:+v‰¨¾«‘êçzZ+€Ê+zf£¢·hšˆ§~††Ûiÿûàz¹ ®w¥¢¸?™¨èÚ&¢)ߢfl===
See commit: e52d8d2d5dffbaee5176a0460f3e9883fb686ac0
1: if it's write #PF, we set spte.w but remove spte.u, then
2: if user access, if will cause read #PF, it will set spte.w = 0 and spte.u = 1
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