Whilst I know others are working on an implementation of at least some of this, a desire to work on the kernel user of this required an implementation so I threw this together in the meantime and am sending it out on the basis that it may be of use to others.
As it is an RFC I have been lazy on some cleanup and error handling. Will fix that in a future version if we decide to take this forwards. Based on Ben's cxl-2.0v3 branch from https://gitlab.com/bwidawsk/qemu Possible I've picked an unstable branch so this may or may not currently apply :) I'll rebase on Ben's next version when avaialble. Jonathan Cameron (4): include/standard-headers/linux/pci_regs: temp hack to add necessary DOE definitions. hw/pci/pcie_doe: Introduce utility functions for PCIe DOE hw/cxl/cxl-cdat: Initial CDAT implementation for use by CXL devices hw/mem/cxl_type3: Enabled DOE mailbox for access to CDAT hw/cxl/cxl-cdat.c | 252 +++++++++++++++++++++ hw/cxl/meson.build | 1 + hw/mem/cxl_type3.c | 49 ++++- hw/pci/meson.build | 2 +- hw/pci/pcie_doe.c | 257 ++++++++++++++++++++++ include/hw/cxl/cxl.h | 1 + include/hw/cxl/cxl_cdat.h | 101 +++++++++ include/hw/pci/doe.h | 40 ++++ include/hw/pci/pci_ids.h | 2 + include/standard-headers/linux/pci_regs.h | 33 ++- 10 files changed, 734 insertions(+), 4 deletions(-) create mode 100644 hw/cxl/cxl-cdat.c create mode 100644 hw/pci/pcie_doe.c create mode 100644 include/hw/cxl/cxl_cdat.h create mode 100644 include/hw/pci/doe.h -- 2.19.1
