[PATCH v2 0/9] s390x/pci: zPCI interpretation support

[Matthew Rosato]

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.

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://lore.kernel.org/kvm/20220114203145.242984-1-mjrosato@linux.ibm.com/

Changes v1->v2:

- Update kernel headers sync                                                    
- Drop some pre-req patches that are now merged                                 
- Add some R-bs (Thanks!)                                                       
- fence FEAT_ZPCI_INTERP for QEMU 6.2 and older (Christian)                     
- switch from container_of to VFIO_PCI and drop asserts (Thomas)                
- re-arrange g_autofree so we malloc at time of declaration (Thomas) 

Matthew Rosato (9):
  Update linux headers
  target/s390x: add zpci-interp to cpu models
  fixup: force interp off for QEMU machine 6.2 and older
  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

 hw/s390x/s390-pci-bus.c                       | 121 ++++++++++-
 hw/s390x/s390-pci-inst.c                      | 168 ++++++++++++++-
 hw/s390x/s390-pci-vfio.c                      | 204 +++++++++++++++++-
 hw/s390x/s390-virtio-ccw.c                    |   1 +
 include/hw/s390x/s390-pci-bus.h               |   8 +-
 include/hw/s390x/s390-pci-inst.h              |   2 +-
 include/hw/s390x/s390-pci-vfio.h              |  45 ++++
 include/standard-headers/asm-x86/kvm_para.h   |   1 +
 include/standard-headers/drm/drm_fourcc.h     |  11 +
 include/standard-headers/linux/ethtool.h      |   1 +
 include/standard-headers/linux/fuse.h         |  60 +++++-
 include/standard-headers/linux/pci_regs.h     |   4 +
 include/standard-headers/linux/virtio_iommu.h |   8 +-
 linux-headers/asm-mips/unistd_n32.h           |   1 +
 linux-headers/asm-mips/unistd_n64.h           |   1 +
 linux-headers/asm-mips/unistd_o32.h           |   1 +
 linux-headers/asm-powerpc/unistd_32.h         |   1 +
 linux-headers/asm-powerpc/unistd_64.h         |   1 +
 linux-headers/asm-s390/kvm.h                  |   1 +
 linux-headers/asm-s390/unistd_32.h            |   1 +
 linux-headers/asm-s390/unistd_64.h            |   1 +
 linux-headers/linux/kvm.h                     |   1 +
 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 +
 27 files changed, 693 insertions(+), 27 deletions(-)

-- 
2.27.0