Re: [PATCH 0/7] cxl: Add CXL type2 accelerator support for cxl_test

[Alejandro Lucero Palau <alucerop@amd.com>]

On 4/23/26 00:02, Dave Jiang wrote:
> The series is based on v7.0-rc7 with Alejandro's type2 series [1] and
> with Dan's follow on series [2].


FWIW, in v26 I am extending Dan's approach as it is not enough for 
safely allowing an accelerator driver to work with the autodiscovered 
region for the cases behind, cxl_acpi removal or cxl_mem ubinding 
accelerator memdev.


Thank you,

Alejandro.


> Series adds a 'type2_test' module parameter where it setup a mock type2
> hierarchy with a mock type2 accelerator device directly under a root
> port that has an auto region setup.
>
> It also includes a CXL fix that was encountered when running tests with
> the new code.
>
> [
>    {
>      "memdevs":[
>        {
>          "memdev":"mem0",
>          "ram_size":536870912,
>          "ram_qos_class":42,
>          "host":"cxl_type2_accel.0",
>          "poison_injectable":false
>        }
>      ]
>    },
>    {
>      "regions":[
>        {
>          "region":"region0",
>          "resource":70300293136384,
>          "size":536870912,
>          "type":"ram",
>          "interleave_ways":1,
>          "interleave_granularity":4096,
>          "decode_state":"commit"
>        }
>      ]
>    }
> ]
>
>      "root decoders":[
>        {
>          "decoder":"decoder0.0",
>          "resource":70300293136384,
>          "size":1073741824,
>          "interleave_ways":1,
>          "accelmem_capable":true,
>          "qos_class":42,
>          "nr_targets":1
>        },
>
> [1]: https://lore.kernel.org/linux-cxl/20260330143827.1278677-1-alejandro.lucero-palau@amd.com/T/#t
> [2]: https://lore.kernel.org/linux-cxl/20260403210050.1058650-1-dan.j.williams@intel.com/T/#t
>
>
> Dave Jiang (7):
>    cxl/test: Refactor mock_init_hdm_decoder() to prep for type2 decoder
>    cxl/test: Add type2 support for mock CFMWS0
>    cxl/test: Refactor platform device enumerations
>    cxl/test: Add hierarchy enumeration support for type2 device
>    cxl/test: Fixup hdm init for auto region to support type2
>    cxl/test: Add cxl_test accelerator driver
>    cxl: Fix double unregistration of CXL regions for type2 devices
>
>   drivers/cxl/core/region.c      |   3 +-
>   tools/testing/cxl/test/Kbuild  |   2 +
>   tools/testing/cxl/test/accel.c |  71 ++++
>   tools/testing/cxl/test/cxl.c   | 717 ++++++++++++++++++++++++---------
>   4 files changed, 605 insertions(+), 188 deletions(-)
>   create mode 100644 tools/testing/cxl/test/accel.c
>
>
> base-commit: 6fa897f2d9a917c4bd7b911b230fcfad05a952c2