Re: [PATCH v4 0/2] KVM: s390: make use of ultravisor AIV support

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On 23.02.22 11:19, Michael Mueller wrote:
This patch enables the ultravisor adapter interruption vitualization
support.

Changes in v4:
- All vcpus are pulled out of SIE and disbled before the control
   blocks are changed to disable/enable the gisa and re-enabled
   afterwards instead of taking the vcpu specific lock.


Christian,

I'm pulling back this v4 and ask for v3 to be re-applied as it turned
out that the described issue is related to kvm_s390_set_tod_clock()
being called in SIE intercepted context.


Changes in v3:
- cache and test GISA descriptor only once in kvm_s390_gisa_enable()
- modified some comments
- removed some whitespace issues

Changes in v2:
- moved GISA disable into "put CPUs in PV mode" routine
- moved GISA enable into "pull CPUs out of PV mode" routine

[1] https://lore.kernel.org/lkml/ae7c65d8-f632-a7f4-926a-50b9660673a1@xxxxxxxxxxxxx/T/#mcb67699bf458ba7482f6b7529afe589d1dbb5930
[2] https://lore.kernel.org/all/20220208165310.3905815-1-mimu@xxxxxxxxxxxxx/
[3] https://lore.kernel.org/all/20220209152217.1793281-2-mimu@xxxxxxxxxxxxx/

Michael Mueller (2):
   KVM: s390: pv: pull all vcpus out of SIE before converting to/from pv
     vcpu
   KVM: s390: pv: make use of ultravisor AIV support

  arch/s390/include/asm/uv.h |  1 +
  arch/s390/kvm/interrupt.c  | 54 +++++++++++++++++++++++++++++++++-----
  arch/s390/kvm/kvm-s390.c   | 19 +++++++++-----
  arch/s390/kvm/kvm-s390.h   | 11 ++++++++
  4 files changed, 72 insertions(+), 13 deletions(-)




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