PS5 HEN defeats XOTEXT by just disabling the NPT on all cores.by:@LegendaryOSM
@LegendaryOSM noticed the recent PS5 HEN defeats XOTEXT by just disabling the NPT on all cores. This works, but it comes with a performance tradeoff, without NPT the HV seems to fall back to shadow page tables. Games seem to have 3x slower loads.
@LegendaryOSM solution is to just walk the nested CR3 and clear XOTEXT and set the RW flags. Gives essentially the same effect as the Bypervisor bug did with the QA flags. I'll make a PR on Cragson's repo once I get some time :D
u/a1mhtar — 19 hours ago