enable HLAT, PWA, and GPV when running on TDX #191
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
The way it's currently set up, HLAT guarantees that accesses to the segments of the kernel binary always happen through a set of read-only pagetables. It also makes it easier to set up GPV.
This allows us to make the read-only page tables actually read-only. This is a requirement for GPV.
Combined with HLAT and PWA, this prevents remapping and aliasing attacks on the segments of the kernel binary.
We don't need kernel memory to be executable in usermode.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Intel CPUs have all these awesome security features, and enabling them is pretty easy, so let's use them.