APPLIED[Xenial]: [PATCH 0/2] KVM enablement for facility bit 81 and 82
kleber.souza at canonical.com
Wed Feb 28 16:17:42 UTC 2018
On 02/02/18 23:54, Joseph Salisbury wrote:
> From: Christian Borntraeger <borntraeger at de.ibm.com>
> BugLink: http://bugs.launchpad.net/bugs/1747090
> == 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 changes.
> This is the public bug for SRU. There is also a priave bug report:
> There is a qemu portion to this fix:
> This fix is also requred in Artful and Bionic, but Xenial requires a prereq commit,
> so it is being SRU'd separatly.
> == Fixes ==
> 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 these patches and tested by the original bug
> reporter. The bug reporter states the test kernel resolved the bug.
> Alexander Yarygin (1):
> KVM: s390: Enable all facility bits that are known good for
> Christian Borntraeger (1):
> KVM: s390: wire up bpb feature
> arch/s390/include/asm/kvm_host.h | 3 ++-
> arch/s390/include/uapi/asm/kvm.h | 3 +++
> arch/s390/kvm/kvm-s390.c | 16 ++++++++++++++--
> include/uapi/linux/kvm.h | 1 +
> 4 files changed, 20 insertions(+), 3 deletions(-)
Just for the record, this patch set has already been applied to xenial
and it was released with xenial/linux 4.4.0-114.137.
More information about the kernel-team