5 ms·
In theory it should be possible for a hyper visor to retrofit a fix into a guest, but it's messy and I doubt anyone will ever do it. Could be fun though. Quick
by tedunangst 9y ago
In theory it should be possible for a hyper visor to retrofit a fix into a guest, but it's messy and I doubt anyone will ever do it. Could be fun though.
Quick sketch: disable EPT and go back to shadow paging. Maintain a third page table with any kernel pages unmapped. Invisibly swap between on syscalls.
- wolf550e 9y agoThis sounds really slow to me. What is the overhead of "disable EPT and go back to shadow paging", or what was the performance win of EPT?