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[Bug 1571798] Re: Broadwell ECRC Support missing in Ubuntu
I started a kernel bisect between v3.17 final and v3.18-rc1. The kernel
bisect will require testing of about 7-10 test kernels.
I built the first test kernel, up to the following commit:
The test kernel can be downloaded from:
Can you test that kernel and report back if it has the bug or not? I
will build the next test kernel based on your test results.
Thanks in advance
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Broadwell ECRC Support missing in Ubuntu
Status in linux package in Ubuntu:
Status in linux source package in Vivid:
Status in linux source package in Wily:
Status in linux source package in Xenial:
Status in linux source package in Yakkety:
Here is the problem statement from the Dell team:
When booting into Ubuntu 14.04.4 with a Broadwell CPU and an Intel
Quick Assist Card, the memory location that corresponds to ECRC is set
to 0x01e0, when the BIOS is setting this location 0x00a0 pre-OS boot.
This causes the card to not function unless we implement the following
workaround using setpci.
“setpci –s AA:BB.C 160.w=0”, where AA:BB.C is the PCI Root Path for
the Intel Quick Assit Card.
We’ve verified the memory location is correct when booting to other
OSes, such as RHEL 7.2 and Windows Server 2012 R2.
If there is any information you can give as to why this may be
occurring in Ubuntu or where we may start to debug when the memory is
changed, we would appreciate it.
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