This bug covers patches to qemu, marking the kernel track as invalid.
** Changed in: ubuntu-power-systems/ubuntu-16.04
Status: In Progress => Invalid
** Changed in: ubuntu-power-systems/ubuntu-14.04
Status: New => Invalid
** Changed in: ubuntu-power-systems
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1765364
Title:
Backport spectre/meltdown fixes on qemu for ppc64 into 16.04 and
possibly 14.04 LTS releases
Status in The Ubuntu-power-systems project:
Fix Released
Status in The Ubuntu-power-systems project ubuntu-14.04 series:
Invalid
Status in The Ubuntu-power-systems project ubuntu-16.04 series:
Invalid
Status in qemu package in Ubuntu:
Fix Released
Status in qemu source package in Xenial:
Fix Released
Bug description:
== Comment: #0 - Satheesh Rajendran <sathe...@in.ibm.com> - 2018-04-19
04:26:51 ==
---Problem Description---
Backport spectre/meltdown fixes on qemu for ppc64 into all LTS releases
Contact Information = sathe...@in.ibm.com
---uname output---
-
Machine Type = power8,power9
---Debugger---
A debugger is not configured
---Steps to Reproduce---
For pseries guests there are 3 tri-state -machine options/capabilities
relating to Spectre/Meltdown mitigation: cap-cfpc, cap-sbbc, cap-ibs, which
each correspond to a set of host machine capabilities advertised by the KVM
kernel module in new/patched host kernels that can be used to mitigate various
aspects of Spectre/Meltdown:
cap-cfpc: Cache Flush on Privilege Change
cap-sbbc: Speculation Barrier Bounds Checking
cap-ibs: Indirect Branch Serialisation
Details can be found here https://www.qemu.org/2018/02/14/qemu-2-11-1
-and-spectre-update/
Needed qemu commits:
cb931c2108 target/ppc: Check mask when setting cap_ppc_safe_indirect_branch
4f5b039d2b ppc/spapr-caps: Disallow setting workaround for spapr-cap-ibs
8c5909c419 ppc/spapr-caps: Change migration macro to take full spapr-cap name
c59704b254 target/ppc/spapr: Add H-Call H_GET_CPU_CHARACTERISTICS
4be8d4e7d9 target/ppc/spapr_caps: Add new tristate cap safe_indirect_branch
09114fd817 target/ppc/spapr_caps: Add new tristate cap safe_bounds_check
8f38eaf8f9 target/ppc/spapr_caps: Add new tristate cap safe_cache
6898aed77f target/ppc/spapr_caps: Add support for tristate spapr_capabilities
8acc2ae5e9 target/ppc/kvm: Add
cap_ppc_safe_[cache/bounds_check/indirect_branch]
Optional commits to introduce a machine type variant pseries-<release>-sxxm,
when used would set/enable the three machine capabilities explained above
automatically, if host is capable(host kernel is supported). Bug 166426
813f3cf655 ppc/spapr-caps: Define the pseries-2.12-sxxm machine type
c76c0d3090 ppc/spapr-caps: Convert cap-ibs to custom spapr-cap
aaf265ffde ppc/spapr-caps: Convert cap-sbbc to custom spapr-cap
f27aa81e72 ppc/spapr-caps: Convert cap-cfpc to custom spapr-cap
87175d1bc5 ppc/spapr-caps: Add support for custom spapr_capabilities
Userspace tool common name: qemu-kvm
The userspace tool has the following bit modes: both
Userspace rpm: qemu-kvm
Userspace tool obtained from project website: na
*Additional Instructions for sathe...@in.ibm.com:
-Attach ltrace and strace of userspace application.
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