[Bug]Avoid PCI BAR setup warning on Broadwell-EP boot
Bug #1559929 reported by
XiongZhang
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
intel |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Vivid |
Fix Released
|
Undecided
|
Unassigned | ||
Wily |
Fix Released
|
Undecided
|
Unassigned | ||
Xenial |
Fix Committed
|
Undecided
|
Unassigned |
Bug Description
BDW-DE/EP/EX has an errata that results in a warning at boot
[ 1.821602] pci 0000:ff:1e.3: [Firmware Bug]: reg 0x10: invalid BAR (can't size)
The problem is just the warning, there is no functional issue
Dell requested to hide the warning. The only way to do that is through a Linux patch.
errata:
98 b308166 - BAR1 to BAR5 in HA returns non-zero values after writing
0xFFFFFFFF to it.
Problem: During BAR initialization the Operating System will try to access BAR registers. Bar1 to
Bar 5 HA (Dev 0x12, Func 0 , 4 Reg 0x14 - 0x24) returns non-zero values after writing
0xFFFFFFFF to it.
information type: | Proprietary → Public |
Changed in linux (Ubuntu Xenial): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
status: | Incomplete → Fix Committed |
Changed in linux (Ubuntu Vivid): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
status: | New → In Progress |
Changed in linux (Ubuntu Wily): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
status: | New → In Progress |
Changed in linux (Ubuntu Wily): | |
status: | In Progress → Fix Committed |
Changed in linux (Ubuntu Vivid): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-done-vivid verification-done-wily removed: verification-needed-vivid verification-needed-wily |
Changed in intel: | |
status: | New → Fix Released |
Changed in linux (Ubuntu): | |
status: | Fix Committed → Fix Released |
Changed in linux (Ubuntu): | |
assignee: | Tim Gardner (timg-tpi) → nobody |
Changed in linux (Ubuntu Vivid): | |
assignee: | Tim Gardner (timg-tpi) → nobody |
Changed in linux (Ubuntu Wily): | |
assignee: | Tim Gardner (timg-tpi) → nobody |
Changed in linux (Ubuntu Xenial): | |
assignee: | Tim Gardner (timg-tpi) → nobody |
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This is fixed in v4.6 kernel. Please back port to 16.04,15.10 and 15.04 kernel.
b894157 x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs
b84106b PCI: Disable IO/MEM decoding for devices with non-compliant BARs