[PATCH v3 0/1] KVM: s390: diag9c forwarding

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This patch will forward the yieldto hypercall (diag9c) if in the host
the target CPU is also not running. As we do not yet have performance
data (and recommendations) the default is turned off, but this can
be changed during runtime.


Pierre Morel (1):
  s390:kvm: diag9c forwarding

 Documentation/virt/kvm/s390-diag.rst | 33 ++++++++++++++++++++++++++++
 arch/s390/include/asm/kvm_host.h     |  1 +
 arch/s390/include/asm/smp.h          |  1 +
 arch/s390/kernel/smp.c               |  1 +
 arch/s390/kvm/diag.c                 | 31 +++++++++++++++++++++++---
 arch/s390/kvm/kvm-s390.c             |  6 +++++
 arch/s390/kvm/kvm-s390.h             |  8 +++++++
 7 files changed, 78 insertions(+), 3 deletions(-)

-- 
2.17.1

Changelog:

>From v2:

- update overrun comparison, avoid comparison on unsigned
  (Pierre)

>From v1:

- more precise comments
  (Connie)

- Documentation
  (Janosch)



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