Re: Why guest physical addresses are not the same as the corresponding host virtual addresses in QEMU/KVM? Thanks!

On 14/10/20 00:40, harry harry wrote:

Q1: Is there any file like ``/proc/pid/pagemap'' to record the mappings between GPAs and HVAs in the host OS?

No, there isn't.

Q2: Seems that there might be extra overhead (e.g., synchronization between EPT tables and host regular page tables; maintaining extra regular page tables and data structures), which is caused by the extra translation between GPAs to HVAs via memslots. Why doesn't KVM directly use GPAs as HVAs and leverage extended/nested page tables to translate HVAs (i.e., GPAs) to HPAs?

See my other answer. What you are saying is simply not possible. Paolo