Set the NX bit for the PML4 recursive mapping
ClosedPublic
Actions

Authored by jtl on Feb 12 2018, 6:39 PM.

Tags

None

Referenced Files

	F139422525: D14333.diff
	Thu, Dec 11, 10:04 PM

	Unknown Object (File)
	Sun, Nov 30, 7:39 AM

	Unknown Object (File)
	Fri, Nov 28, 4:08 AM

	Unknown Object (File)
	Fri, Nov 21, 12:49 AM

	Unknown Object (File)
	Thu, Nov 20, 11:47 PM

	Unknown Object (File)
	Thu, Nov 20, 11:45 PM

	Unknown Object (File)
	Thu, Nov 20, 11:42 PM

	Unknown Object (File)
	Thu, Nov 20, 11:41 PM

View All 86 Files

Subscribers

imp

Details

Reviewers

alc
markj
kib

Commits

rS330511: We shouldn't need to execute code in the recursive page table mappings;

Summary

We shouldn't need to execute code in the recursive page table mappings; therefore, it should be safe to set the NX bit on the PML4E for the recurse page table mappings. According to the Intel docs, the effect of the NX bit should propogate to any page reached through a PML4E which has the NX bit set.