Messages in this thread | | | Date | Mon, 18 Aug 2014 18:52:10 +0800 | From | Xiao Guangrong <> | Subject | Re: [PATCH 1/5] KVM: vmx: fix ept reserved bits for 1-GByte page |
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On 08/18/2014 05:50 PM, Wanpeng Li wrote: > EPT misconfig handler in kvm will check which reason lead to EPT > misconfiguration after vmexit. One of the reasons is that an EPT > paging-structure entry is configured with settings reserved for > future functionality. However, the handler can't identify if > paging-structure entry of reserved bits for 1-GByte page are > configured, since PDPTE which point to 1-GByte page will reserve > bits 29:12 instead of bits 7:3 which are reserved for PDPTE that > references an EPT Page Directory. This patch fix it by reserve > bits 29:12 for 1-GByte page.
That mask is only set in the lowest pte for 4K page, i think it is not a problem, no?
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