[Userspace LL] llext: adjust for MMU flag application - #11064
Open
lyakh wants to merge 1 commit into
Open
Conversation
The .cold section contains executable code, while .coldrodata contains data. Therefore their MMU flags have to be different, particularly when mapping for userspace. Add a page-size alignment to account for such cases. Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
lyakh
requested review from
dbaluta,
kv2019i,
lbetlej,
lgirdwood,
mmaka1 and
plbossart
as code owners
August 5, 2026 13:00
Contributor
There was a problem hiding this comment.
Pull request overview
This PR updates the LLEXT link helper to ensure executable DRAM sections and DRAM read-only data sections (.cold vs .coldrodata) do not end up sharing the same MMU page, enabling correct per-page permission flags when mapping for userspace.
Changes:
- Removes an outdated comment about
.coldbeing marked executable. - Inserts a 4KiB page alignment boundary between linked executable DRAM sections and subsequent
.coldrodataDRAM sections.
lgirdwood
approved these changes
Aug 5, 2026
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
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
The .cold section contains executable code, while .coldrodata contains data. Therefore their MMU flags have to be different, particularly when mapping for userspace. Add a page-size alignment to account for such cases.