On Mon, 1 Feb 2021 23:16:25 +0800
Jonathan Cameron <Jonathan.Cameron@huawei.com> wrote:
> 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.
In the interests of info for anyone seeing this, note there is an
alternative version from Chris Browy and colleagues.
https://lore.kernel.org/qemu-devel/alpine.LRH.2.23.451.2102021543190.30097@server4/
Note that it's proved useful because we disagreed on a few things some
of which I believe need spec clarification.
(definitely one spec misread in this version - oops).
>
> 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
>