Provide mode where all vCPUs on a core must be the same VM

Bug #1792955 reported by bugproxy
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
The Ubuntu-power-systems project
New
Medium
Canonical Kernel Team
linux (Ubuntu)
New
Undecided
Ubuntu on IBM Power Systems Bug Triage

Bug Description

== Comment: #0 - Leonardo Augusto Guimaraes Garcia <email address hidden> - 2018-09-13 07:33:25 ==
+++ This bug was initially created as a clone of Bug #171443 +++

Please, add the following patch:

http://patchwork.ozlabs.org/patch/968786/

which adds a mode where all vCPUs on a core must be the same VM on POWER8 and POWER9.

This is intended for use in security-conscious settings where users are concerned about possible side-channel attacks between threads which could perhaps enable one VM to attack another VM on the same core, or the host.

bugproxy (bugproxy)
tags: added: architecture-ppc64le bugnameltc-171450 severity-medium targetmilestone-inin16041
Changed in ubuntu:
assignee: nobody → Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
affects: ubuntu → kernel-package (Ubuntu)
affects: kernel-package (Ubuntu) → linux (Ubuntu)
Changed in ubuntu-power-systems:
assignee: nobody → Canonical Kernel Team (canonical-kernel-team)
importance: Undecided → Medium
tags: added: triage-g
Revision history for this message
bugproxy (bugproxy) wrote : Comment bridged from LTC Bugzilla

------- Comment From <email address hidden> 2019-03-13 16:55 EDT-------
Hello Canonical,

This has been included in Ubuntu 18.04 and Ubuntu 18.10 on Launchpad 1792957. Is there anything blocking its inclusion in Ubuntu 16.04 as well?

Revision history for this message
bugproxy (bugproxy) wrote :

------- Comment From <email address hidden> 2020-04-22 10:53 EDT-------
My understanding is that at this point Canonical is not accepting new features into Ubuntu 16.04, even simple ones as this one.

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