Public bug reported:
---Problem Description---
The PSL data cache should be flushed before resetting a CAPI adapter.
If the PSL data cache holds dirty cache line when it is reset, the host trying
to access that memory when the link is down may face a Uncorrectable Error
(UE), forcing a reboot of the system.
---uname output---
Linux freak 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:40:06 UTC 2016 ppc64le
ppc64le ppc64le GNU/Linux
---Additional Hardware Info---
CAPI adapter needed + AFU image using the PSL cache (e.g. afu_directed memcpy)
Machine Type = Tuleta
---Steps to Reproduce---
There's some randomness to it, but triggering a memcpy test + card reset in a
loop can produce it:
memcpy_afu_ctx -p100 -l1000
echo 1 > /sys/class/cxl/card0/reset
Fix is already upstream under commit ID:
aaa2245ed836824f21f8e42e0ab63b1637d1cb20
"cxl: Flush PSL cache before resetting the adapter"
We would like the fix released for both 16.04 and 16.10 please.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: New
** Tags: architecture-ppc64le bugnameltc-147421 severity-medium
targetmilestone-inin16041
** Tags added: architecture-ppc64le bugnameltc-147421 severity-medium
targetmilestone-inin16041
** Changed in: ubuntu
Assignee: (unassigned) => Taco Screen team (taco-screen-team)
** Package changed: ubuntu => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1632049
Title:
PSL data cache should be flushed before resetting CAPI adapter
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