Disable PAMU on Freescale kernels
Bug #1311738 reported by
Tim Gardner
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Ben Collins | ||
Trusty |
Fix Released
|
Medium
|
Ben Collins | ||
Utopic |
Fix Released
|
Medium
|
Ben Collins |
Bug Description
In Saucy/v3.11 kernel, we used the PAMU SAUCE patch from Freescale. The current upstreamed PAMU code appears to break fsl-ehci by restricting proper access to memory locations associated with it.
PAMU is an IOMMU extension that protects and prevents access to portions of memory that are known to be reserved for hardware use. This extension is not needed for normal runtime, so rather than allow broken EHCI, let's disbale this until PAMU can be fixed.
This only affects Freescale PowerPC kernel variations.
Changed in linux (Ubuntu Trusty): | |
assignee: | nobody → Ben Collins (ben-collins) |
status: | New → In Progress |
Changed in linux (Ubuntu Trusty): | |
importance: | Undecided → Medium |
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This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification- needed- trusty' to 'verification- done-trusty' .
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed. Thank you!