[v3,0/3] KVM: s390: Enable AP instructions for PV-guests

Message

Steffen Eiden Aug. 10, 2023, 11:32 a.m. UTC

This series enables general KVM support for AP-passthrough for Secure
Execution guests (PV-guests).

To enable AP inside PV-guests two things have to be done/considered:
	1) set corresponding flags in the Create Secure Configuration UVC if
     firmware supports AP for PV-guests (patch 3).
	2) enable/disable AP in PV-guests if the VMM wants this (patch 2).

since v2:
  - applied styling recommendations from Heiko

since v1:
  - PATCH 1: r-b from Claudio
  - PATCH 2: fixed formatting issues (Claudio)
  - PATCH 3: removed unnecessary checks (Claudio)

Steffen

Steffen Eiden (3):
  s390: uv: UV feature check utility
  KVM: s390: Add UV feature negotiation
  KVM: s390: pv:  Allow AP-instructions for pv-guests

 arch/s390/include/asm/kvm_host.h |  2 +
 arch/s390/include/asm/uv.h       | 17 ++++++-
 arch/s390/include/uapi/asm/kvm.h | 16 +++++++
 arch/s390/kernel/uv.c            |  2 +-
 arch/s390/kvm/kvm-s390.c         | 76 +++++++++++++++++++++++++++++++-
 arch/s390/kvm/pv.c               |  6 ++-
 arch/s390/mm/fault.c             |  2 +-
 7 files changed, 115 insertions(+), 6 deletions(-)