ACK: [PATCH 0/2] KVM enablement for facility bit 81 and 82

Khaled Elmously khalid.elmously at canonical.com
Thu Feb 8 19:47:02 UTC 2018


On 2018-02-02 17:54:04 , 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:
> http://bugs.launchpad.net/bugs/1743560
> 
> There is a qemu portion to this fix:
> http://patchwork.ozlabs.org/cover/862801/
> 
> 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
>     passthrough
> 
> 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(-)
>
Acked-by: Khalid Elmously <khalid.elmously at canonical.com>




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