The S390 APQP/AQIC instruction can be intercepted by the host to configure the AP queues interruption handling for and handle the ISC used by the host and the guest and the indicator address.
This patch series define the AQIC feature in the cpumodel, extend the APDevice type for per queue interrupt handling, intercept the APQP/AQIC instruction, uses the S390 adapter interface to setup the adapter and use a VFIO ioctl to let the VFIO-AP driver handle the host instruction associated with the intercepted guest instruction. This patch serie can be tested with the Linux/KVM patch series for the VFIO-AP driver: "s390: vfio: ap: Using GISA for AP Interrupt" Pierre Morel (5): s390x/vfio: ap: Linux uapi VFIO place holder s390x/cpumodel: Set up CPU model for AQIC interception s390x/vfio: ap: Definition for AP Adapter type s390x/vfio: ap: Intercepting AP Queue Interrupt Control s390x/vfio: ap: Implementing AP Queue Interrupt Control hw/vfio/ap.c | 100 ++++++++++++++++++++++++++++++++ include/hw/s390x/ap-device.h | 55 ++++++++++++++++++ include/hw/s390x/css.h | 1 + linux-headers/linux/vfio.h | 22 +++++++ target/s390x/cpu_features.c | 1 + target/s390x/cpu_features_def.h | 1 + target/s390x/cpu_models.c | 1 + target/s390x/kvm.c | 20 +++++++ 8 files changed, 201 insertions(+) -- 2.17.0
