Linus Torvalds 02c163e959 cxl for v6.9 ... - Supplement ACPI HMAT reported memory performance with native CXL memory performance enumeration - Add support for CXL error injection via the ACPI EINJ mechanism - Cleanup CXL DOE and CDAT integration - Miscellaneous cleanups and fixes -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQSbo+XnGs+rwLz9XGXfioYZHlFsZwUCZfSddgAKCRDfioYZHlFs Z+QJAQC0DaU/QbziEUFgd6r92nLA9PHLWi2zhjsSjyuJ3kh3IQD+KN0h8IZ+Av05 EOjLw21+ejwJ2dtCDcy2dlSpS6653wc= =czLR -----END PGP SIGNATURE----- Merge tag 'cxl-for-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl Pull CXL updates from Dan Williams: "CXL has mechanisms to enumerate the performance characteristics of memory devices. Those mechanisms allow Linux to build the equivalent of ACPI SRAT, SLIT, and HMAT tables dynamically at runtime. That capability is necessary because static ACPI can not represent dynamic CXL configurations (and reconfigurations). So, building on the v6.8 work to add "Quality of Service" enumeration, this update plumbs CXL "access coordinates" (read/write access latency and bandwidth) in all the same places that ACPI HMAT feeds similar data. Follow-on patches from the -mm side can then use that data to feed mechanisms like mm/memory-tiers.c. Greg has acked the touch to drivers/base/. The other feature update this cycle is support for CXL error injection via the ACPI EINJ module. That facility enables injection of bus protocol errors provided the user knows the magic address values to insert in the interface. To hide that magic, and make this easier to use, new error injection attributes were added to CXL debugfs. That interface injects the errors relative to a CXL object rather than require user tooling to know how to lookup and inject RCRB (Root Complex Register Block) addresses into the raw EINJ debugfs interface. It received some helpful review comments from Tony, but no explicit acks from the ACPI side. The primary user visible change for existing EINJ users is that they may find that einj.ko was already loaded by cxl_core.ko. Previously, einj.ko was only loaded on demand. The usual collection of miscellaneous cleanups are also present this cycle. Summary: - Supplement ACPI HMAT reported memory performance with native CXL memory performance enumeration - Add support for CXL error injection via the ACPI EINJ mechanism - Cleanup CXL DOE and CDAT integration - Miscellaneous cleanups and fixes" * tag 'cxl-for-6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (21 commits) Documentation/ABI/testing/debugfs-cxl: Fix "Unexpected indentation" lib/firmware_table: Provide buffer length argument to cdat_table_parse() cxl/pci: Get rid of pointer arithmetic reading CDAT table cxl/pci: Rename DOE mailbox handle to doe_mb cxl: Fix the incorrect assignment of SSLBIS entry pointer initial location cxl/core: Add CXL EINJ debugfs files EINJ, Documentation: Update EINJ kernel doc EINJ: Add CXL error type support EINJ: Migrate to a platform driver cxl/region: Deal with numa nodes not enumerated by SRAT cxl/region: Add memory hotplug notifier for cxl region cxl/region: Add sysfs attribute for locality attributes of CXL regions cxl/region: Calculate performance data for a region cxl: Set cxlmd->endpoint before adding port device cxl: Move QoS class to be calculated from the nearest CPU cxl: Split out host bridge access coordinates cxl: Split out combine_coordinates() for common shared usage ACPI: HMAT / cxl: Add retrieval of generic port coordinates for both access classes ACPI: HMAT: Introduce 2 levels of generic port access class base/node / ACPI: Enumerate node access class for 'struct access_coordinate' ...		2024-03-16 10:04:12 -07:00
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acpi	cxl for v6.9	2024-03-16 10:04:12 -07:00
index.rst