This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1786139
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: cosmic
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https://bugs.launchpad.net/bugs/1786139
Title:
[GLK/CLX] Enhanced IBRS
Status in intel:
Triaged
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Trusty:
Won't Fix
Status in linux source package in Xenial:
In Progress
Status in linux source package in Bionic:
In Progress
Status in linux source package in Cosmic:
In Progress
Status in linux source package in DD-Series:
In Progress
Bug description:
Description:
Future Intel CPU's like Cascade Lake and GLK+ support Enhanced IBRS.
Enhanced IBRS is a H/W mitigation technique for Spectre V2 bug. So,
it's important for us to make sure that all the OSV's are using this
feature.
The patch that enables kernel support for this feature has been taken
by Thomas and it's in TIP tree. So, please back port it to all the
OSV's. Please find the patch here:
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/pti&id=706d51681d636a0c4a5ef53395ec3b803e45ed4d
Target Kernel:4.18
Target Release: 18.10
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