Hello,

The following allows support for component basic back invalidation discovery
and config, by exposing the BI routing table and decoder registers. Instead
of going the type2[0] route, this series proposes adding support for type3
hdm-db, which allows a more direct way of supporting BI in qemu.

Changes from rfc (https://lore.kernel.org/qemu-devel/20250729165441.1898150-1-dave@stgolabs.net/)
  o Added 256b-flit parameter, per Jonathan.
  o Added window restrictions changes.
  o Dropped rfc tag.

Patch 1 introduces the flit mode parameter.
Patch 2 is lifted from Ira's series with some small (but non-trivial) changes.
Patch 3 updates the cfmw restrictions option.
Patch 4 adds BI decoder/rt register support.

Testing wise, this has passed relevant kernel side BI register IO flows for
BI-ID setup and deallocation.

The next step for this would be to add UIO support to qemu.

Applies against branch 'origin/cxl-2025-07-03' from Jonathan's repository.

Thanks!

[0] https://lore.kernel.org/linux-cxl/20230517-rfc-type2-dev-v1-0-6eb2e470981b@intel.com/

Davidlohr Bueso (3):
  hw/pcie: Support enabling flit mode
  hw/cxl: Allow BI by default in Window restrictions
  hw/cxl: Support Type3 HDM-DB

Ira Weiny (1):
  hw/cxl: Refactor component register initialization

 docs/system/devices/cxl.rst               |  26 +++
 hw/core/qdev-properties-system.c          |  11 ++
 hw/cxl/cxl-component-utils.c              | 206 ++++++++++++++++------
 hw/cxl/cxl-host.c                         |   2 +-
 hw/mem/cxl_type3.c                        |  13 +-
 hw/pci-bridge/cxl_downstream.c            |   1 +
 hw/pci-bridge/cxl_root_port.c             |   1 +
 hw/pci-bridge/cxl_upstream.c              |   3 +-
 hw/pci-bridge/gen_pcie_root_port.c        |   1 +
 hw/pci/pcie.c                             |  13 +-
 include/hw/cxl/cxl_component.h            |  87 +++++++--
 include/hw/cxl/cxl_device.h               |   4 +
 include/hw/pci-bridge/cxl_upstream_port.h |   1 +
 include/hw/pci/pcie.h                     |   2 +-
 include/hw/pci/pcie_port.h                |   1 +
 include/hw/qdev-properties-system.h       |   3 +
 qapi/common.json                          |  14 ++
 qapi/machine.json                         |   3 +-
 qemu-options.hx                           |   4 +-
 19 files changed, 317 insertions(+), 79 deletions(-)

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2.39.5