mlx-bootctl: support icm carveout eeprom region read/write
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux-bluefield (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
| Jammy |
Fix Committed
|
Medium
|
Asmaa Mnebhi | ||
Bug Description
SRU Justification:
[Impact]
The BlueField-3 ICM carveout feature will enable NIC FW to bypass the SMMU block to access DRAM memory.
The amount of memory accessible by FW will be controlled by ARM. This patch enables setting the size of the large ICM carveout from userspace. The max size is 1TB, has a granularity of 128MB and will be passed
and printed in hex. The size unit is MB.
[Fix]
* Support SMC calls to control the large ICM carveout size.
[Test Case]
* Only valid testing on BlueField-3 real hardware.
* set the region size from sysfs and NIC FW will test that it has access to the entire region requested.
[Regression Potential]
* This code doesn't really have a negative impact on the functionality of the mlxbf-bootctl driver itself but could be a risk for the overall boot if not used/tested properly.
* memory region requested is too large, adn linux cannot boot as a result. The memory allocated for the ICM carveout cannot be accessed by linux.
* the icmc size is not passed properly to NIC FW
| Changed in linux-bluefield (Ubuntu Jammy): | |
| assignee: | nobody → Asmaa Mnebhi (asmaam) |
| importance: | Undecided → Medium |
| status: | New → In Progress |
| Changed in linux-bluefield (Ubuntu): | |
| status: | New → Invalid |
| Changed in linux-bluefield (Ubuntu Jammy): | |
| status: | In Progress → Fix Committed |
| Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote | #1 |
| tags: | added: kernel-spammed-jammy-linux-bluefield verification-needed-jammy |
| tags: |
added: verification-done-jammy removed: verification-needed-jammy |
This bug is awaiting verification that the linux-bluefield
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:/