On 12/7/21 22:04, Matthew Rosato wrote:
> Note: The first 3 patches of this series are included as pre-reqs, but
> should be pulled via a separate series. Also, patch 5 is needed to
> support 5.16+ linux header-sync and was already done by Paolo but not
> merged yet so is thus included here as well.
>
> For QEMU, the majority of the work in enabling instruction interpretation
> is handled via new VFIO ioctls to SET the appropriate interpretation and
> interrupt forwarding modes, and to GET the function handle to use for
> interpretive execution.
>
> This series implements these new ioctls, as well as adding a new, optional
> 'intercept' parameter to zpci to request interpretation support not be used
> as well as an 'intassist' parameter to determine whether or not the
> firmware assist will be used for interrupt delivery or whether the host
> will be responsible for delivering all interrupts.
In which circumstances do we have an added value by not using interrupt
delivered by firmware?
>
> The ZPCI_INTERP CPU feature is added beginning with the z14 model to
> enable this support.
>
> 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://lkml.org/lkml/2021/12/7/1179
>
> Matthew Rosato (11):
> s390x/pci: use a reserved ID for the default PCI group
> s390x/pci: don't use hard-coded dma range in reg_ioat
> s390x/pci: add supported DT information to clp response
> Update linux headers
> target/s390x: add zpci-interp to cpu models
> 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: use I/O Address Translation assist when interpreting
> s390x/pci: use dtsm provided from vfio capabilities for interpreted
> devices
> s390x/pci: let intercept devices have separate PCI groups
>
> Paolo Bonzini (1):
> virtio-gpu: do not byteswap padding
>
> hw/s390x/s390-pci-bus.c | 121 +++++++++-
> hw/s390x/s390-pci-inst.c | 178 +++++++++++++-
> hw/s390x/s390-pci-vfio.c | 221 +++++++++++++++++-
> include/hw/s390x/s390-pci-bus.h | 11 +-
> include/hw/s390x/s390-pci-clp.h | 3 +-
> include/hw/s390x/s390-pci-inst.h | 2 +-
> include/hw/s390x/s390-pci-vfio.h | 45 ++++
> include/hw/virtio/virtio-gpu-bswap.h | 1 -
> include/standard-headers/asm-x86/kvm_para.h | 1 +
> include/standard-headers/drm/drm_fourcc.h | 121 +++++++++-
> include/standard-headers/linux/ethtool.h | 31 +++
> include/standard-headers/linux/fuse.h | 15 +-
> include/standard-headers/linux/pci_regs.h | 6 +
> include/standard-headers/linux/virtio_gpu.h | 18 +-
> include/standard-headers/linux/virtio_ids.h | 24 ++
> include/standard-headers/linux/virtio_mem.h | 9 +-
> include/standard-headers/linux/virtio_vsock.h | 3 +-
> linux-headers/asm-arm64/unistd.h | 1 +
> linux-headers/asm-generic/unistd.h | 22 +-
> linux-headers/asm-mips/unistd_n32.h | 2 +
> linux-headers/asm-mips/unistd_n64.h | 2 +
> linux-headers/asm-mips/unistd_o32.h | 2 +
> linux-headers/asm-powerpc/unistd_32.h | 2 +
> linux-headers/asm-powerpc/unistd_64.h | 2 +
> linux-headers/asm-s390/kvm.h | 1 +
> linux-headers/asm-s390/unistd_32.h | 2 +
> linux-headers/asm-s390/unistd_64.h | 2 +
> linux-headers/asm-x86/kvm.h | 5 +
> linux-headers/asm-x86/unistd_32.h | 3 +
> linux-headers/asm-x86/unistd_64.h | 3 +
> linux-headers/asm-x86/unistd_x32.h | 3 +
> linux-headers/linux/kvm.h | 41 +++-
> linux-headers/linux/vfio.h | 22 ++
> linux-headers/linux/vfio_zdev.h | 51 ++++
> target/s390x/cpu_features_def.h.inc | 1 +
> target/s390x/gen-features.c | 2 +
> target/s390x/kvm/kvm.c | 1 +
> 37 files changed, 928 insertions(+), 52 deletions(-)
>
--
Pierre Morel
IBM Lab Boeblingen