Re: [PATCH v19 00/22] Type2 device basic support

[Dave Jiang <dave.jiang@intel.com>]

On 10/10/25 8:57 AM, Dave Jiang wrote:
> 
> 
> On 10/10/25 3:39 AM, Alejandro Lucero Palau wrote:
>> Hi Dave,
>>
>> On 10/8/25 00:41, Dave Jiang wrote:
>>> CAUTION: This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email.
>>>
>>>
>>> On 10/6/25 3:01 AM, alejandro.lucero-palau@amd.com wrote:
>>>> From: Alejandro Lucero <alucerop@amd.com>
>>>>
>>>> The patchset should be applied on the described base commit then applying
>>>> Terry's v11 about CXL error handling. The first 3 patches come from Dan's
>>>> for-6.18/cxl-probe-order branch.
>>> I Alejandro, I can't seem to apply with this instruction:
>>>
>>> ✔ ~/git/kernel-review [review L|…9]
>>> 16:35 $ git reset --hard f11a5f89910a7ae970fbce4fdc02d86a8ba8570f
>>> HEAD is now at f11a5f89910a Documentation/ABI/testing/debugfs-cxl: Add 'cxl' to clear_poison path
>>> ✔ ~/git/kernel-review [review L|…9]
>>> 16:35 $ b4 shazam https://lore.kernel.org/linux-cxl/20251006100130.2623388-1-alejandro.lucero-palau@amd.com/T/#m712c7d01ffc7350d9ef638b932b9693a96fe47a9
>>> Grabbing thread from lore.kernel.org/all/20251006100130.2623388-1-alejandro.lucero-palau@amd.com/t.mbox.gz
>>> Checking for newer revisions
>>> Grabbing search results from lore.kernel.org
>>> Analyzing 33 messages in the thread
>>> Analyzing 620 code-review messages
>>> Checking attestation on all messages, may take a moment...
>>> ---
>>>    ✓ [PATCH v19 1/22] cxl/mem: Arrange for always-synchronous memdev attach
>>>    ✓ [PATCH v19 2/22] cxl/port: Arrange for always synchronous endpoint attach
>>>    ✓ [PATCH v19 3/22] cxl/mem: Introduce a memdev creation ->probe() operation
>>>    ✓ [PATCH v19 4/22] cxl: Add type2 device basic support
>>>    ✓ [PATCH v19 5/22] sfc: add cxl support
>>>    ✓ [PATCH v19 6/22] cxl: Move pci generic code
>>>    ✓ [PATCH v19 7/22] cxl: allow Type2 drivers to map cxl component regs
>>>    ✓ [PATCH v19 8/22] cxl: Support dpa initialization without a mailbox
>>>    ✓ [PATCH v19 9/22] cxl: Prepare memdev creation for type2
>>>    ✓ [PATCH v19 10/22] sfc: create type2 cxl memdev
>>>    ✓ [PATCH v19 11/22] cxl: Define a driver interface for HPA free space enumeration
>>>    ✓ [PATCH v19 12/22] sfc: get root decoder
>>>    ✓ [PATCH v19 13/22] cxl: Define a driver interface for DPA allocation
>>>      + Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
>>>    ✓ [PATCH v19 14/22] sfc: get endpoint decoder
>>>    ✓ [PATCH v19 15/22] cxl: Make region type based on endpoint type
>>>      + Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> (✓ DKIM/stgolabs.net)
>>>    ✓ [PATCH v19 16/22] cxl/region: Factor out interleave ways setup
>>>    ✓ [PATCH v19 17/22] cxl/region: Factor out interleave granularity setup
>>>    ✓ [PATCH v19 18/22] cxl: Allow region creation by type2 drivers
>>>    ✓ [PATCH v19 19/22] cxl: Avoid dax creation for accelerators
>>>    ✓ [PATCH v19 20/22] sfc: create cxl region
>>>    ✓ [PATCH v19 21/22] cxl: Add function for obtaining region range
>>>    ✓ [PATCH v19 22/22] sfc: support pio mapping based on cxl
>>>    ---
>>>    ✓ Signed: DKIM/amd.com
>>>    ---
>>>    NOTE: install patatt for end-to-end signature verification
>>> ---
>>> Total patches: 22
>>> ---
>>>   Deps: looking for dependencies matching 23 patch-ids
>>>   Deps: Applying prerequisite patch: [PATCH v11 01/23] cxl: Remove ifdef blocks of CONFIG_PCIEAER_CXL from core/pci.c
>>>   Deps: Applying prerequisite patch: [PATCH v11 02/23] CXL/AER: Remove CONFIG_PCIEAER_CXL and replace with CONFIG_CXL_RAS
>>>   Deps: Applying prerequisite patch: [PATCH v11 03/23] cxl/pci: Remove unnecessary CXL Endpoint handling helper functions
>>>   Deps: Applying prerequisite patch: [PATCH v11 04/23] cxl/pci: Remove unnecessary CXL RCH handling helper functions
>>>   Deps: Applying prerequisite patch: [PATCH v11 05/23] cxl: Move CXL driver RCH error handling into CONFIG_CXL_RCH_RAS conditional block
>>>   Deps: Applying prerequisite patch: [PATCH v11 06/23] CXL/AER: Introduce rch_aer.c into AER driver for handling CXL RCH errors
>>>   Deps: Applying prerequisite patch: [PATCH v11 08/23] PCI/CXL: Introduce pcie_is_cxl()
>>>   Deps: Applying prerequisite patch: [PATCH v11 09/23] PCI/AER: Report CXL or PCIe bus error type in trace logging
>>>   Deps: Applying prerequisite patch: [PATCH v11 10/23] CXL/AER: Update PCI class code check to use FIELD_GET()
>>>   Deps: Applying prerequisite patch: [PATCH v11 11/23] cxl/pci: Update RAS handler interfaces to also support CXL Ports
>>>   Deps: Applying prerequisite patch: [PATCH v12 12/25] cxl/pci: Log message if RAS registers are unmapped
>>>   Deps: Applying prerequisite patch: [PATCH v11 13/23] cxl/pci: Unify CXL trace logging for CXL Endpoints and CXL Ports
>>>   Deps: Applying prerequisite patch: [PATCH v12 14/25] cxl/pci: Update cxl_handle_cor_ras() to return early if no RAS errors
>>>   Deps: Applying prerequisite patch: [PATCH v11 15/23] cxl/pci: Map CXL Endpoint Port and CXL Switch Port RAS registers
>>>   Deps: Applying prerequisite patch: [PATCH v11 17/23] CXL/AER: Introduce cxl_aer.c into AER driver for forwarding CXL errors
>>>   Deps: Applying prerequisite patch: [PATCH v11 18/23] PCI/AER: Dequeue forwarded CXL error
>>>   Deps: Applying prerequisite patch: [PATCH v11 19/23] CXL/PCI: Introduce CXL Port protocol error handlers
>>>   Deps: Applying prerequisite patch: [PATCH v11 20/23] CXL/PCI: Export and rename merge_result() to pci_ers_merge_result()
>>>   Deps: Applying prerequisite patch: [PATCH v11 21/23] CXL/PCI: Introduce CXL uncorrectable protocol error recovery
>>>   Deps: Applying prerequisite patch: [PATCH v11 22/23] CXL/PCI: Enable CXL protocol errors during CXL Port probe
>>>   Deps: Applying prerequisite patch: [PATCH v11 23/23] CXL/PCI: Disable CXL protocol error interrupts during CXL Port cleanup
>>> Applying: cxl: Remove ifdef blocks of CONFIG_PCIEAER_CXL from core/pci.c
>>> Applying: CXL/AER: Remove CONFIG_PCIEAER_CXL and replace with CONFIG_CXL_RAS
>>> Applying: cxl/pci: Remove unnecessary CXL Endpoint handling helper functions
>>> Applying: cxl/pci: Remove unnecessary CXL RCH handling helper functions
>>> Applying: cxl: Move CXL driver RCH error handling into CONFIG_CXL_RCH_RAS conditional block
>>> Applying: CXL/AER: Introduce rch_aer.c into AER driver for handling CXL RCH errors
>>> Applying: PCI/CXL: Introduce pcie_is_cxl()
>>> Patch failed at 0007 PCI/CXL: Introduce pcie_is_cxl()
>>> error: patch failed: include/uapi/linux/pci_regs.h:1274
>>> error: include/uapi/linux/pci_regs.h: patch does not apply
>>> hint: Use 'git am --show-current-patch=diff' to see the failed patch
>>> hint: When you have resolved this problem, run "git am --continue".
>>> hint: If you prefer to skip this patch, run "git am --skip" instead.
>>> hint: To restore the original branch and stop patching, run "git am --abort".
>>> hint: Disable this message with "git config set advice.mergeConflict false"
>>>
>>> I also tried applying Terry's v11 first (which applied) and then this series failed as well.
>>
>>
>> You need to apply Terry's v11 patches for sure on the commit base. If not the v19 series can not be applied cleanly.
>>
>>
>> I have tried this again a couple of times and it works for me:
>>
>>
>> 1)  git reset --hard f11a5f89910a
>>
>> 2) git am Enable-CXL-PCIe-Port-Protocol-Error-handling-and-logging.patch
>>
>> 3) git am Type2-device-basic-support.patch
> 
> 1) $ git reset --hard f11a5f89910a
> 2) $ b4 shazam -v11 https://lore.kernel.org/linux-cxl/20250827013539.903682-1-terry.bowman@amd.com/T/#m9c6963513137b67d281414e88b57fe4f346bedab
> (success)
> 3) $ b4 shazam https://lore.kernel.org/linux-cxl/0b41e061-53e1-49ef-9f24-01e01143b709@amd.com/T/#m712c7d01ffc7350d9ef638b932b9693a96fe47a9
> ...
> Applying: cxl: Remove ifdef blocks of CONFIG_PCIEAER_CXL from core/pci.c
> Patch failed at 0001 cxl: Remove ifdef blocks of CONFIG_PCIEAER_CXL from core/pci.c
> error: patch failed: drivers/cxl/Kconfig:233
> error: drivers/cxl/Kconfig: patch does not apply
> error: patch failed: drivers/cxl/core/Makefile:14
> error: drivers/cxl/core/Makefile: patch does not apply
> error: patch failed: drivers/cxl/core/core.h:143
> error: drivers/cxl/core/core.h: patch does not apply
> error: patch failed: drivers/cxl/core/pci.c:6
> error: drivers/cxl/core/pci.c: patch does not apply
> error: patch failed: drivers/cxl/core/ras.c:5
> error: drivers/cxl/core/ras.c: patch does not apply
> error: patch failed: drivers/cxl/cxl.h:761
> error: drivers/cxl/cxl.h: patch does not apply
> error: patch failed: drivers/cxl/cxlpci.h:132
> error: drivers/cxl/cxlpci.h: patch does not apply
> error: patch failed: tools/testing/cxl/Kbuild:61
> error: tools/testing/cxl/Kbuild: patch does not apply
> ...
> 
> DJ
> 

Alison is able to apply with an older version of b4. Maybe it's something to do with the newer versions. Anyhow, she pushed a branch internally for me so I can use it for code review.

DJ

>>
>>
>> Hopefully you can reproduce this as well. Maybe Ben Cheatham can comment on this, if he had problems applying them, as it seems he was able to work with it.
>>
>>
>> Thank you
>>
>>
>>> DJ
>>>
>>>> v19 changes:
>>>>
>>>>    Removal of cxl_acquire_endpoint and driver callback for unexpected cxl
>>>>    module removal. Dan's patches made them unnecessary.
>>>>
>>>>    patch 4: remove code already moved by Terry's patches (Ben Cheatham)
>>>>
>>>>    patch 6: removed unrelated change (Ben Cheatham)
>>>>
>>>>    patch 7: fix error report inconsistencies (Jonathan, Dave)
>>>>
>>>>    patch 9: remove unnecessary comment (Ben Cheatham)
>>>>
>>>>    patch 11: fix __free usage (Jonathan Cameron, Ben Cheatham)
>>>>
>>>>    patch 13: style fixes (Jonathan Cameron, Dave Jiag)
>>>>
>>>>    patch 14: move code to previous patch (Jonathan Cameron)
>>>>
>>>>    patch 18: group code in one locking (Dave Jian)
>>>>            use __free helper (Ben Cheatham)
>>>>
>>>>
>>>> v18 changes:
>>>>
>>>>    patch 1: minor changes and fixing docs generation (Jonathan, Dan)
>>>>
>>>>    patch4: merged with v17 patch5
>>>>
>>>>    patch 5: merging v17 patches 6 and 7
>>>>
>>>>    patch 6: adding helpers for clarity
>>>>
>>>>    patch 9:
>>>>        - minor changes (Dave)
>>>>        - simplifying flags check (Dan)
>>>>
>>>>    patch 10: minor changes (Jonathan)
>>>>
>>>>    patch 11:
>>>>        - minor changes (Dave)
>>>>        - fix mess (Jonathan, Dave)
>>>>
>>>>    patch 18: minor changes (Jonathan, Dan)
>>>>
>>>> v17 changes: (Dan Williams review)
>>>>   - use devm for cxl_dev_state allocation
>>>>   - using current cxl struct for checking capability registers found by
>>>>     the driver.
>>>>   - simplify dpa initialization without a mailbox not supporting pmem
>>>>   - add cxl_acquire_endpoint for protection during initialization
>>>>   - add callback/action to cxl_create_region for a driver notified about cxl
>>>>     core kernel modules removal.
>>>>   - add sfc function to disable CXL-based PIO buffers if such a callback
>>>>     is invoked.
>>>>   - Always manage a Type2 created region as private not allowing DAX.
>>>>
>>>> v16 changes:
>>>>   - rebase against rc4 (Dave Jiang)
>>>>   - remove duplicate line (Ben Cheatham)
>>>>
>>>> v15 changes:
>>>>   - remove reference to unused header file (Jonathan Cameron)
>>>>   - add proper kernel docs to exported functions (Alison Schofield)
>>>>   - using an array to map the enums to strings (Alison Schofield)
>>>>   - clarify comment when using bitmap_subset (Jonathan Cameron)
>>>>   - specify link to type2 support in all patches (Alison Schofield)
>>>>
>>>>    Patches changed (minor): 4, 11
>>>>
>>>> v14 changes:
>>>>   - static null initialization of bitmaps (Jonathan Cameron)
>>>>   - Fixing cxl tests (Alison Schofield)
>>>>   - Fixing robot compilation problems
>>>>
>>>>    Patches changed (minor): 1, 4, 6, 13
>>>>
>>>> v13 changes:
>>>>   - using names for headers checking more consistent (Jonathan Cameron)
>>>>   - using helper for caps bit setting (Jonathan Cameron)
>>>>   - provide generic function for reporting missing capabilities (Jonathan Cameron)
>>>>   - rename cxl_pci_setup_memdev_regs to cxl_pci_accel_setup_memdev_regs (Jonathan Cameron)
>>>>   - cxl_dpa_info size to be set by the Type2 driver (Jonathan Cameron)
>>>>   - avoiding rc variable when possible (Jonathan Cameron)
>>>>   - fix spelling (Simon Horman)
>>>>   - use scoped_guard (Dave Jiang)
>>>>   - use enum instead of bool (Dave Jiang)
>>>>   - dropping patch with hardware symbols
>>>>
>>>> v12 changes:
>>>>   - use new macro cxl_dev_state_create in pci driver (Ben Cheatham)
>>>>   - add public/private sections in now exported cxl_dev_state struct (Ben
>>>>     Cheatham)
>>>>   - fix cxl/pci.h regarding file name for checking if defined
>>>>   - Clarify capabilities found vs expected in error message. (Ben
>>>>     Cheatham)
>>>>   - Clarify new CXL_DECODER_F flag (Ben Cheatham)
>>>>   - Fix changes about cxl memdev creation support moving code to the
>>>>     proper patch. (Ben Cheatham)
>>>>   - Avoid debug and function duplications (Ben Cheatham)
>>>>
>>>> v11 changes:
>>>>   - Dropping the use of cxl_memdev_state and going back to using
>>>>     cxl_dev_state.
>>>>   - Using a helper for an accel driver to allocate its own cxl-related
>>>>     struct embedding cxl_dev_state.
>>>>   - Exporting the required structs in include/cxl/cxl.h for an accel
>>>>     driver being able to know the cxl_dev_state size required in the
>>>>     previously mentioned helper for allocation.
>>>>   - Avoid using any struct for dpa initialization by the accel driver
>>>>     adding a specific function for creating dpa partitions by accel
>>>>     drivers without a mailbox.
>>>>
>>>> v10 changes:
>>>>   - Using cxl_memdev_state instead of cxl_dev_state for type2 which has a
>>>>     memory after all and facilitates the setup.
>>>>   - Adapt core for using cxl_memdev_state allowing accel drivers to work
>>>>     with them without further awareness of internal cxl structs.
>>>>   - Using last DPA changes for creating DPA partitions with accel driver
>>>>     hardcoding mds values when no mailbox.
>>>>   - capabilities not a new field but built up when current register maps
>>>>     is performed and returned to the caller for checking.
>>>>   - HPA free space supporting interleaving.
>>>>   - DPA free space droping max-min for a simple alloc size.
>>>>
>>>> v9 changes:
>>>>   - adding forward definitions (Jonathan Cameron)
>>>>   - using set_bit instead of bitmap_set (Jonathan Cameron)
>>>>   - fix rebase problem (Jonathan Cameron)
>>>>   - Improve error path (Jonathan Cameron)
>>>>   - fix build problems with cxl region dependency (robot)
>>>>   - fix error path (Simon Horman)
>>>>
>>>> v8 changes:
>>>>   - Change error path labeling inside sfc cxl code (Edward Cree)
>>>>   - Properly handling checks and error in sfc cxl code (Simon Horman)
>>>>   - Fix bug when checking resource_size (Simon Horman)
>>>>   - Avoid bisect problems reordering patches (Edward Cree)
>>>>   - Fix buffer allocation size in sfc (Simon Horman)
>>>>
>>>> v7 changes:
>>>>
>>>>   - fixing kernel test robot complains
>>>>   - fix type with Type3 mandatory capabilities (Zhi Wang)
>>>>   - optimize code in cxl_request_resource (Kalesh Anakkur Purayil)
>>>>   - add sanity check when dealing with resources arithmetics (Fan Ni)
>>>>   - fix typos and blank lines (Fan Ni)
>>>>   - keep previous log errors/warnings in sfc driver (Martin Habets)
>>>>   - add WARN_ON_ONCE if region given is NULL
>>>>
>>>> v6 changes:
>>>>
>>>>   - update sfc mcdi_pcol.h with full hardware changes most not related to
>>>>     this patchset. This is an automatic file created from hardware design
>>>>     changes and not touched by software. It is updated from time to time
>>>>     and it required update for the sfc driver CXL support.
>>>>   - remove CXL capabilities definitions not used by the patchset or
>>>>     previous kernel code. (Dave Jiang, Jonathan Cameron)
>>>>   - Use bitmap_subset instead of reinventing the wheel ... (Ben Cheatham)
>>>>   - Use cxl_accel_memdev for new device_type created (Ben Cheatham)
>>>>   - Fix construct_region use of rwsem (Zhi Wang)
>>>>   - Obtain region range instead of region params (Allison Schofield, Dave
>>>>     Jiang)
>>>>
>>>> v5 changes:
>>>>
>>>>   - Fix SFC configuration based on kernel CXL configuration
>>>>   - Add subset check for capabilities.
>>>>   - fix region creation when HDM decoders programmed by firmware/BIOS (Ben
>>>>     Cheatham)
>>>>   - Add option for creating dax region based on driver decission (Ben
>>>>     Cheatham)
>>>>   - Using sfc probe_data struct for keeping sfc cxl data
>>>>
>>>> v4 changes:
>>>>
>>>>   - Use bitmap for capabilities new field (Jonathan Cameron)
>>>>   - Use cxl_mem attributes for sysfs based on device type (Dave Jian)
>>>>   - Add conditional cxl sfc compilation relying on kernel CXL config (kernel test robot)
>>>>   - Add sfc changes in different patches for facilitating backport (Jonathan Cameron)
>>>>   - Remove patch for dealing with cxl modules dependencies and using sfc kconfig plus
>>>>     MODULE_SOFTDEP instead.
>>>>
>>>> v3 changes:
>>>>
>>>>   - cxl_dev_state not defined as opaque but only manipulated by accel drivers
>>>>     through accessors.
>>>>   - accessors names not identified as only for accel drivers.
>>>>   - move pci code from pci driver (drivers/cxl/pci.c) to generic pci code
>>>>     (drivers/cxl/core/pci.c).
>>>>   - capabilities field from u8 to u32 and initialised by CXL regs discovering
>>>>     code.
>>>>   - add capabilities check and removing current check by CXL regs discovering
>>>>     code.
>>>>   - Not fail if CXL Device Registers not found. Not mandatory for Type2.
>>>>   - add timeout in acquire_endpoint for solving a race with the endpoint port
>>>>     creation.
>>>>   - handle EPROBE_DEFER by sfc driver.
>>>>   - Limiting interleave ways to 1 for accel driver HPA/DPA requests.
>>>>   - factoring out interleave ways and granularity helpers from type2 region
>>>>     creation patch.
>>>>   - restricting region_creation for type2 to one endpoint decoder.
>>>>
>>>> v2 changes:
>>>>
>>>> I have removed the introduction about the concerns with BIOS/UEFI after the
>>>> discussion leading to confirm the need of the functionality implemented, at
>>>> least is some scenarios.
>>>>
>>>> There are two main changes from the RFC:
>>>>
>>>> 1) Following concerns about drivers using CXL core without restrictions, the CXL
>>>> struct to work with is opaque to those drivers, therefore functions are
>>>> implemented for modifying or reading those structs indirectly.
>>>>
>>>> 2) The driver for using the added functionality is not a test driver but a real
>>>> one: the SFC ethernet network driver. It uses the CXL region mapped for PIO
>>>> buffers instead of regions inside PCIe BARs.
>>>>
>>>> RFC:
>>>>
>>>> Current CXL kernel code is focused on supporting Type3 CXL devices, aka memory
>>>> expanders. Type2 CXL devices, aka device accelerators, share some functionalities
>>>> but require some special handling.
>>>>
>>>> First of all, Type2 are by definition specific to drivers doing something and not just
>>>> a memory expander, so it is expected to work with the CXL specifics. This implies the CXL
>>>> setup needs to be done by such a driver instead of by a generic CXL PCI driver
>>>> as for memory expanders. Most of such setup needs to use current CXL core code
>>>> and therefore needs to be accessible to those vendor drivers. This is accomplished
>>>> exporting opaque CXL structs and adding and exporting functions for working with
>>>> those structs indirectly.
>>>>
>>>> Some of the patches are based on a patchset sent by Dan Williams [1] which was just
>>>> partially integrated, most related to making things ready for Type2 but none
>>>> related to specific Type2 support. Those patches based on Dan´s work have Dan´s
>>>> signing as co-developer, and a link to the original patch.
>>>>
>>>> A final note about CXL.cache is needed. This patchset does not cover it at all,
>>>> although the emulated Type2 device advertises it. From the kernel point of view
>>>> supporting CXL.cache will imply to be sure the CXL path supports what the Type2
>>>> device needs. A device accelerator will likely be connected to a Root Switch,
>>>> but other configurations can not be discarded. Therefore the kernel will need to
>>>> check not just HPA, DPA, interleave and granularity, but also the available
>>>> CXL.cache support and resources in each switch in the CXL path to the Type2
>>>> device. I expect to contribute to this support in the following months, and
>>>> it would be good to discuss about it when possible.
>>>>
>>>> [1] https://lore.kernel.org/linux-cxl/98b1f61a-e6c2-71d4-c368-50d958501b0c@intel.com/T/
>>>>
>>>> Alejandro Lucero (21):
>>>>    cxl/mem: Arrange for always-synchronous memdev attach
>>>>    cxl/port: Arrange for always synchronous endpoint attach
>>>>    cxl: Add type2 device basic support
>>>>    sfc: add cxl support
>>>>    cxl: Move pci generic code
>>>>    cxl: allow Type2 drivers to map cxl component regs
>>>>    cxl: Support dpa initialization without a mailbox
>>>>    cxl: Prepare memdev creation for type2
>>>>    sfc: create type2 cxl memdev
>>>>    cxl: Define a driver interface for HPA free space enumeration
>>>>    sfc: get root decoder
>>>>    cxl: Define a driver interface for DPA allocation
>>>>    sfc: get endpoint decoder
>>>>    cxl: Make region type based on endpoint type
>>>>    cxl/region: Factor out interleave ways setup
>>>>    cxl/region: Factor out interleave granularity setup
>>>>    cxl: Allow region creation by type2 drivers
>>>>    cxl: Avoid dax creation for accelerators
>>>>    sfc: create cxl region
>>>>    cxl: Add function for obtaining region range
>>>>    sfc: support pio mapping based on cxl
>>>>
>>>> Dan Williams (1):
>>>>    cxl/mem: Introduce a memdev creation ->probe() operation
>>>>
>>>>   drivers/cxl/Kconfig                   |   2 +-
>>>>   drivers/cxl/core/core.h               |   9 +-
>>>>   drivers/cxl/core/hdm.c                |  85 ++++++
>>>>   drivers/cxl/core/mbox.c               |  63 +---
>>>>   drivers/cxl/core/memdev.c             | 209 +++++++++----
>>>>   drivers/cxl/core/pci.c                |  63 ++++
>>>>   drivers/cxl/core/port.c               |   1 +
>>>>   drivers/cxl/core/region.c             | 418 +++++++++++++++++++++++---
>>>>   drivers/cxl/core/regs.c               |   2 +-
>>>>   drivers/cxl/cxl.h                     | 125 +-------
>>>>   drivers/cxl/cxlmem.h                  |  90 +-----
>>>>   drivers/cxl/cxlpci.h                  |  21 +-
>>>>   drivers/cxl/mem.c                     | 146 +++++----
>>>>   drivers/cxl/pci.c                     |  88 +-----
>>>>   drivers/cxl/port.c                    |  46 ++-
>>>>   drivers/cxl/private.h                 |  17 ++
>>>>   drivers/net/ethernet/sfc/Kconfig      |  10 +
>>>>   drivers/net/ethernet/sfc/Makefile     |   1 +
>>>>   drivers/net/ethernet/sfc/ef10.c       |  50 ++-
>>>>   drivers/net/ethernet/sfc/efx.c        |  15 +-
>>>>   drivers/net/ethernet/sfc/efx.h        |   1 -
>>>>   drivers/net/ethernet/sfc/efx_cxl.c    | 165 ++++++++++
>>>>   drivers/net/ethernet/sfc/efx_cxl.h    |  40 +++
>>>>   drivers/net/ethernet/sfc/net_driver.h |  12 +
>>>>   drivers/net/ethernet/sfc/nic.h        |   3 +
>>>>   include/cxl/cxl.h                     | 291 ++++++++++++++++++
>>>>   include/cxl/pci.h                     |  21 ++
>>>>   tools/testing/cxl/Kbuild              |   1 -
>>>>   tools/testing/cxl/test/mem.c          |   5 +-
>>>>   tools/testing/cxl/test/mock.c         |  17 --
>>>>   30 files changed, 1476 insertions(+), 541 deletions(-)
>>>>   create mode 100644 drivers/cxl/private.h
>>>>   create mode 100644 drivers/net/ethernet/sfc/efx_cxl.c
>>>>   create mode 100644 drivers/net/ethernet/sfc/efx_cxl.h
>>>>   create mode 100644 include/cxl/cxl.h
>>>>   create mode 100644 include/cxl/pci.h
>>>>
>>>>
>>>> base-commit: f11a5f89910a7ae970fbce4fdc02d86a8ba8570f
>>>> prerequisite-patch-id: 44c914dd079e40d716f3f2d91653247eca731594
>>>> prerequisite-patch-id: b13ca5c11c44a736563477d67b1dceadfe3ea19e
>>>> prerequisite-patch-id: d0d82965bbea8a2b5ea2f763f19de4dfaa8479c3
>>>> prerequisite-patch-id: dd0f24b3bdb938f2f123bc26b31cd5fe659e05eb
>>>> prerequisite-patch-id: 2ea41ec399f2360a84e86e97a8f940a62561931a
>>>> prerequisite-patch-id: 367b61b5a313db6324f9cf917d46df580f3bbd3b
>>>> prerequisite-patch-id: 1805332a9f191bc3547927d96de5926356dac03c
>>>> prerequisite-patch-id: 40657fd517f8e835a091c07e93d6abc08f85d395
>>>> prerequisite-patch-id: 901eb0d91816499446964b2a9089db59656da08d
>>>> prerequisite-patch-id: 79856c0199d6872fd2f76a5829dba7fa46f225d6
>>>> prerequisite-patch-id: 6f3503e59a3d745e5ecff4aaed668e2d32da7e4b
>>>> prerequisite-patch-id: e9dc88f1b91dce5dc3d46ff2b5bf184aba06439d
>>>> prerequisite-patch-id: 196fe106100aad619d5be7266959bbeef29b7c8b
>>>> prerequisite-patch-id: 7e719ed404f664ee8d9b98d56f58326f55ea2175
>>>> prerequisite-patch-id: 560f95992e13a08279034d5f77aacc9e971332dd
>>>> prerequisite-patch-id: 8656445ee654056695ff2894e28c8f1014df919e
>>>> prerequisite-patch-id: 001d831149eb8f9ae17b394e4bcd06d844dd39d9
>>>> prerequisite-patch-id: 421368aa5eac2af63ef2dc427af2ec11ad45c925
>>>> prerequisite-patch-id: 18fd00d4743711d835ad546cfbb558d9f97dcdfc
>>>> prerequisite-patch-id: d89bf9e6d3ea5d332ec2c8e441f1fe6d84e726d3
>>>> prerequisite-patch-id: 3a6953d11b803abeb437558f3893a3b6a08acdbb
>>>> prerequisite-patch-id: 0dd42a82e73765950bd069d421d555ded8bfeb25
>>>> prerequisite-patch-id: da6e0df31ad0d5a945e0a0d29204ba75f0c97344
>>>
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