Hi Linus, please pull from: git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl tags/cxl-fixes-6.3-rc6 ...to receive several fixes for driver startup regressions that landed in v6.3-rc1 as well as some older bugs. The regressions were due to a lack of testing with what the CXL specification calls Restricted CXL Host (RCH) topologies compared to the testing with Virtual Host (VH) CXL topologies. A VH topology is typical PCIe while RCH topologies map CXL endpoints as Root Complex Integrated endpoints. The impact is some driver crashes on startup. v6.3-rc1 also added compatibility for range registers (the mechanism that CXL 1.1 defined for mapping memory) to treat them like HDM decoders (the mechanism that CXL 2.0 defined for mapping Host-managed Device Memory). That work collided with the new region enumeration code that was tested with CXL 2.0 setups, and fails with crashes at startup. Lastly, the DOE (Data Object Exchange) implementation for retrieving an ACPI-like data table from CXL devices is being reworked for v6.4. Several fixes fell out of that work that are suitable for v6.3. All of this has been in linux-next for a while, and all reported issues [1] have been addressed. [1]: http://lore.kernel.org/r/20230405075704.33de8121@xxxxxxxxxxxxxxxx --- The following changes since commit e8d018dd0257f744ca50a729e3d042cf2ec9da65: Linux 6.3-rc3 (2023-03-19 13:27:55 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl tags/cxl-fixes-6.3-rc6 for you to fetch changes up to ca712e47054678c5ce93a0e0f686353ad5561195: Merge branch 'for-6.3/cxl-doe-fixes' into for-6.3/cxl (2023-04-04 15:37:25 -0700) ---------------------------------------------------------------- cxl fixes for v6.3-rc6 - Fix several issues with region enumeration in RCH topologies that can trigger crashes on driver startup or shutdown. - Fix CXL DVSEC range register compatibility versus region enumeration that leads to startup crashes - Fix CDAT endiannes handling - Fix multiple buffer handling boundary conditions - Fix Data Object Exchange (DOE) workqueue usage vs CONFIG_DEBUG_OBJECTS warn splats ---------------------------------------------------------------- Dan Williams (8): cxl/hdm: Fix double allocation of @cxlhdm cxl/hdm: Skip emulation when driver manages mem_enable cxl/port: Fix find_cxl_root() for RCDs and simplify it cxl/region: Fix region setup/teardown for RCDs cxl/region: Move coherence tracking into cxl_region_attach() cxl/hdm: Limit emulation to the number of range registers cxl/hdm: Extend DVSEC range register emulation for region enumeration Merge branch 'for-6.3/cxl-doe-fixes' into for-6.3/cxl Lukas Wunner (6): cxl/pci: Fix CDAT retrieval on big endian cxl/pci: Handle truncated CDAT header cxl/pci: Handle truncated CDAT entries cxl/pci: Handle excessive CDAT length PCI/DOE: Silence WARN splat with CONFIG_DEBUG_OBJECTS=y PCI/DOE: Fix memory leak with CONFIG_DEBUG_OBJECTS=y drivers/cxl/core/hdm.c | 126 +++++++++++++++++++++++++--------------------- drivers/cxl/core/pci.c | 38 ++++++++------ drivers/cxl/core/pmem.c | 6 +-- drivers/cxl/core/port.c | 38 +++----------- drivers/cxl/core/region.c | 33 ++++++++++-- drivers/cxl/cxl.h | 8 +-- drivers/cxl/cxlpci.h | 14 ++++++ drivers/cxl/port.c | 4 +- drivers/pci/doe.c | 30 ++++++----- include/linux/pci-doe.h | 8 ++- 10 files changed, 175 insertions(+), 130 deletions(-)
