[v4,0/4] KVM: s390: Enable AP instructions for PV-guests

Message

Steffen Eiden Aug. 15, 2023, 3:14 p.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 4).
	2) enable/disable AP in PV-guests if the VMM wants this (patch 3).

since v3:
  - add a patch from Viktor that handles a new rc that can occur with AP-pt.
  - remove KVM_S390_VM_CPU_UV_FEAT_GUEST_DEFAULT define (Janosch)
  - add a boundary check in uv_has_feature() (Janosch)
  - add r-b from Janosch

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

Viktor Mihajlovski (1):
  KVM: s390: pv: relax WARN_ONCE condition for destroy fast

 arch/s390/include/asm/kvm_host.h |  2 +
 arch/s390/include/asm/uv.h       | 19 +++++++-
 arch/s390/include/uapi/asm/kvm.h | 16 +++++++
 arch/s390/kernel/uv.c            |  2 +-
 arch/s390/kvm/kvm-s390.c         | 75 +++++++++++++++++++++++++++++++-
 arch/s390/kvm/pv.c               |  9 ++--
 arch/s390/mm/fault.c             |  2 +-
 7 files changed, 118 insertions(+), 7 deletions(-)

Comments

Janosch Frank Aug. 17, 2023, 11:56 a.m. UTC | #1

On 8/15/23 17:14, Steffen Eiden wrote:
> This series enables general KVM support for AP-passthrough for Secure
> Execution guests (PV-guests).

Thanks, picked