On 01/09/2016 16:20, Li, Liang Z wrote: > Intel SDM doesn't describe whether the A bit will be set or not when > CPU accesses a no present EPT page table entry
Bits in a non-present page table entry are entirely for use by the OS. The processor will never touch it. This includes both P=0 in non-EPT page tables and XWR=000 in EPT page tables. Paolo

