** Description changed: - == SRU Justification == - Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility - bits 81 (ppa15) and 82 (bpb). This is required for branch prediction behaviour + Mainline commit 35b3fde6203b9 is a KVM patch for s390x to provide facility + bits 81 (ppa15) and 82 (bpb). This is required for branch prediction behaviour changes. This is the public bug for SRU. There is also a priave bug report: http://bugs.launchpad.net/bugs/1743560 There is a qemu portion to this fix: http://patchwork.ozlabs.org/cover/862801/ - == Fix == - commit 35b3fde6203b932b2b1a5b53b3d8808abc9c4f60 - Author: Christian Borntraeger <borntrae...@de.ibm.com> - Date: Wed Jan 17 14:44:34 2018 +0100 + == Fixes == + Artful/Bionic: + 35b3fde6203b ("KVM: s390: wire up bpb feature") - KVM: s390: wire up bpb feature + Xenial: + ed8dda0bf74b ("Enable all facility bits that are known good for passthrough") + 35b3fde6203b ("KVM: s390: wire up bpb feature") == Regression Potential == Low, this fix is limited to s390. == Test Case == A test kernel was built with this patch and tested by the original bug reporter. The bug reporter states the test kernel resolved the bug.
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