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

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Message-Id: <20230810113255.2163043-1-seiden@linux.ibm.com>
Date:   Thu, 10 Aug 2023 13:32:52 +0200
From:   Steffen Eiden <seiden@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Michael Mueller <mimu@...ux.vnet.ibm.com>,
        Marc Hartmayer <mhartmay@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>
Subject: [PATCH v3 0/3] KVM: s390: Enable AP instructions for PV-guests

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(-)

-- 
2.40.1