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Re: [qemu-s390x] [PATCH v6 0/5] s390x: vfio-ap: guest dedicated crypto a

From: Tony Krowiak
Subject: Re: [qemu-s390x] [PATCH v6 0/5] s390x: vfio-ap: guest dedicated crypto adapters
Date: Tue, 7 Aug 2018 18:41:29 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0


On 06/29/2018 06:47 PM, Tony Krowiak wrote:
From: Tony Krowiak <address@hidden>

This patch series is the QEMU counterpart to the KVM/kernel support for
guest dedicated crypto adapters. The KVM/kernel model is built on the
VFIO mediated device framework and provides the infrastructure for
granting exclusive guest access to crypto devices installed on the linux
host. This patch series introduces a new QEMU command line option, QEMU
object model and CPU model features to exploit the KVM/kernel model.

See the detailed specifications for AP virtualization provided by this
patch set in docs/vfio-ap.txt for a more complete discussion of the
design introduced by this patch series.

Note: This series implements the minimal viable product (MVP) and does not
       provide support for hot plug/unplug or migration. The goal
       of the MVP model is to solidify a base upon which these additional
       features will be built.

v5 => v6 Change log:
* Added reset handling fo vfio-ap device
* Added a bridge/bus to AP device object model - thanks to Halil Pasic

v4 => v5 Change log:
* Added MAINTAINERS entries for VFIO AP
* Added explanation for why we are only supporting zEC12 and newer CPU
* Changed CPU model feature qci=on|off to apqci=on|off
* Misc. minor changes

v3 => v4 Change log:
* Made vfio-ap device unpluggable for now
* Renamed command line CPU model feature for QCI: qci=on -> apqci=on
* Removed call to KVM_S390_VM_CRYPTO_INTERPRET_AP ioctl - ioctl was
   removed from kernel and AP instruction interpretation is set from the
   VFIO device driver
* Added check to ensure only one vfio-ap device can be configured per
* Removed AP instruction interception handlers: AP instructions will be
   interpreted by default if AP facilities are installed to handle the case
   where feature ap=on and no vfio-ap device is configured for the guest.

Tony Krowiak (5):
   linux-headers: linux header updates for AP support
   s390x/cpumodel: Set up CPU model for AP device support
   s390x/ap: base Adjunct Processor (AP) object model
   s390x/vfio: ap: Introduce VFIO AP device
   s390: doc: detailed specifications for AP virtualization

  MAINTAINERS                       |   14 +
  default-configs/s390x-softmmu.mak |    1 +
  docs/vfio-ap.txt                  |  649 +++++++++++++++++++++++++++++++++++++
  hw/s390x/Makefile.objs            |    2 +
  hw/s390x/ap-bridge.c              |   76 +++++
  hw/s390x/ap-device.c              |   39 +++
  hw/s390x/s390-virtio-ccw.c        |    4 +
  hw/vfio/Makefile.objs             |    1 +
  hw/vfio/ap.c                      |  183 +++++++++++
  include/hw/s390x/ap-bridge.h      |   37 +++
  include/hw/s390x/ap-device.h      |   38 +++
  include/hw/vfio/vfio-common.h     |    1 +
  linux-headers/asm-s390/kvm.h      |    2 +
  linux-headers/linux/vfio.h        |    2 +
  target/s390x/cpu_features.c       |    3 +
  target/s390x/cpu_features_def.h   |    3 +
  target/s390x/cpu_models.c         |    2 +
  target/s390x/gen-features.c       |    3 +
  target/s390x/kvm.c                |    1 +
  19 files changed, 1061 insertions(+), 0 deletions(-)
  create mode 100644 docs/vfio-ap.txt
  create mode 100644 hw/s390x/ap-bridge.c
  create mode 100644 hw/s390x/ap-device.c
  create mode 100644 hw/vfio/ap.c
  create mode 100644 include/hw/s390x/ap-bridge.h
  create mode 100644 include/hw/s390x/ap-device.h

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