For QEMU, the majority of the work in enabling instruction interpretation is handled via SHM bit settings (to indicate to firmware whether or not interpretive execution facilities are to be used) + a new KVM ioctl is used to setup firmware-interpreted forwarding of Adapter Event Notifications. This series also adds a new, optional 'interpret' parameter to zpci which can be used to disable interpretation support (interpret=off) as well as an 'forwarding_assist' parameter to determine whether or not the firmware assist will be used for adapter event delivery (default when interpretation is in use) or whether the host will be responsible for delivering all adapter event notifications (forwarding_assist=off). The zpcii-disable machine property is added to allow disabling use of zPCI interpretation facilities for a guest. This property is set to on for older (pre-7.1 compat machines), but defaults to off for 7.1 and newer. This allows newer machines to use interpretation by default if the necessary kernel interfaces and hardware facilities are available, but also provides a mechanism for disabling interpretation completely for debug purposes. As a consequence of implementing zPCI interpretation, ISM devices now become eligible for passthrough (but only when zPCI interpretation is available). >From the perspective of guest configuration, you passthrough zPCI devices in the same manner as before, with intepretation support being used by default if available in kernel+qemu. Associated kernel series: https://lore.kernel.org/kvm/20220606203325.110625-1-mjrosato@xxxxxxxxxxxxx/ Changelog v6->v7: - update linux header sync to 5.19-rc1 + latest kernel series - Drop 'target/s390x: add zpci-interp to cpu models' (David) - Add a new patch that adds the zpcii-disable machine property. zpcii-disable=on can be used to force interpretation facilities off for the guest. With this series, 7.1 machine and newer will default this to off, meaning interpretation will be allowed if available by default. 7.0 and older machines will default to zpcii-disable=on. zPCI interpretation will only be used when the underlying kernel supports it, hardware facilties are available and zpcii-disable=off. Matthew Rosato (8): Update linux headers s390x/pci: add routine to get host function handle from CLP info s390x/pci: enable for load/store intepretation s390x/pci: don't fence interpreted devices without MSI-X s390x/pci: enable adapter event notification for interpreted devices s390x/pci: let intercept devices have separate PCI groups s390x/pci: reflect proper maxstbl for groups of interpreted devices s390x/s390-virtio-ccw: add zpcii-disable machine property hw/s390x/meson.build | 1 + hw/s390x/s390-pci-bus.c | 111 +++++++++++++++- hw/s390x/s390-pci-inst.c | 56 +++++++- hw/s390x/s390-pci-kvm.c | 54 ++++++++ hw/s390x/s390-pci-vfio.c | 129 ++++++++++++++++--- hw/s390x/s390-virtio-ccw.c | 24 ++++ include/hw/s390x/s390-pci-bus.h | 8 +- include/hw/s390x/s390-pci-kvm.h | 38 ++++++ include/hw/s390x/s390-pci-vfio.h | 5 + include/hw/s390x/s390-virtio-ccw.h | 1 + include/standard-headers/asm-x86/bootparam.h | 1 + include/standard-headers/drm/drm_fourcc.h | 69 ++++++++++ include/standard-headers/linux/ethtool.h | 1 + include/standard-headers/linux/input.h | 1 + include/standard-headers/linux/pci_regs.h | 1 + include/standard-headers/linux/vhost_types.h | 11 +- include/standard-headers/linux/virtio_ids.h | 14 +- linux-headers/asm-arm64/kvm.h | 27 ++++ linux-headers/asm-generic/unistd.h | 4 +- linux-headers/asm-riscv/kvm.h | 20 +++ linux-headers/asm-riscv/unistd.h | 3 +- linux-headers/asm-x86/kvm.h | 11 +- linux-headers/asm-x86/mman.h | 14 -- linux-headers/linux/kvm.h | 85 +++++++++++- linux-headers/linux/userfaultfd.h | 10 +- linux-headers/linux/vfio.h | 4 +- linux-headers/linux/vfio_zdev.h | 7 + linux-headers/linux/vhost.h | 26 +++- qemu-options.hx | 8 +- target/s390x/kvm/kvm.c | 7 + target/s390x/kvm/kvm_s390x.h | 1 + util/qemu-config.c | 4 + 32 files changed, 683 insertions(+), 73 deletions(-) create mode 100644 hw/s390x/s390-pci-kvm.c create mode 100644 include/hw/s390x/s390-pci-kvm.h -- 2.27.0
