user/sven/linux.git/drivers/base/node.c, branch stable/6.9.y

cxl/region: Deal with numa nodes not enumerated by SRAT

2024-03-12T21:54:03Z

For the numa nodes that are not created by SRAT, no memory_target is allocated and is not managed by the HMAT_REPORTING code. Therefore hmat_callback() memory hotplug notifier will exit early on those NUMA nodes. The CXL memory hotplug notifier will need to call node_set_perf_attrs() directly in order to setup the access sysfs attributes. In acpi_numa_init(), the last proximity domain (pxm) id created by SRAT is stored. Add a helper function acpi_node_backed_by_real_pxm() in order to check if a NUMA node id is defined by SRAT or created by CFMWS. node_set_perf_attrs() symbol is exported to allow update of perf attribs for a node. The sysfs path of /sys/devices/system/node/nodeX/access0/initiators/* is created by node_set_perf_attrs() for the various attributes where nodeX is matched to the NUMA node of the CXL region. Cc: Rafael J. Wysocki Reviewed-by: Alison Schofield Reviewed-by: Jonathan Cameron Tested-by: Jonathan Cameron Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/20240308220055.2172956-13-dave.jiang@intel.com Signed-off-by: Dan Williams

base/node / ACPI: Enumerate node access class for 'struct access_coordinate'

2024-03-12T19:34:11Z

Both generic node and HMAT handling code have been using magic numbers to indicate access classes for 'struct access_coordinate'. Introduce enums to enumerate the access0 and access1 classes shared by the two subsystems. Update the function parameters and callers as appropriate to utilize the new enum. Access0 is named to ACCESS_COORDINATE_LOCAL in order to indicate that the access class is for 'struct access_coordinate' between a target node and the nearest initiator node. Access1 is named to ACCESS_COORDINATE_CPU in order to indicate that the access class is for 'struct access_coordinate' between a target node and the nearest CPU node. Cc: Greg Kroah-Hartman Cc: Rafael J. Wysocki Reviewed-by: Jonathan Cameron Tested-by: Jonathan Cameron Acked-by: Greg Kroah-Hartman Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/20240308220055.2172956-3-dave.jiang@intel.com Signed-off-by: Dan Williams

Merge tag 'cxl-for-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl

2024-01-19T00:22:43Z

Pull CXL (Compute Express Link) updates from Dan Williams: "The bulk of this update is support for enumerating the performance capabilities of CXL memory targets and connecting that to a platform CXL memory QoS class. Some follow-on work remains to hook up this data into core-mm policy, but that is saved for v6.9. The next significant update is unifying how CXL event records (things like background scrub errors) are processed between so called "firmware first" and native error record retrieval. The CXL driver handler that processes the record retrieved from the device mailbox is now the handler for that same record format coming from an EFI/ACPI notification source. This also contains miscellaneous feature updates, like Get Timestamp, and other fixups. Summary: - Add support for parsing the Coherent Device Attribute Table (CDAT) - Add support for calculating a platform CXL QoS class from CDAT data - Unify the tracing of EFI CXL Events with native CXL Events. - Add Get Timestamp support - Miscellaneous cleanups and fixups" * tag 'cxl-for-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (41 commits) cxl/core: use sysfs_emit() for attr's _show() cxl/pci: Register for and process CPER events PCI: Introduce cleanup helpers for device reference counts and locks acpi/ghes: Process CXL Component Events cxl/events: Create a CXL event union cxl/events: Separate UUID from event structures cxl/events: Remove passing a UUID to known event traces cxl/events: Create common event UUID defines cxl/events: Promote CXL event structures to a core header cxl: Refactor to use __free() for cxl_root allocation in cxl_endpoint_port_probe() cxl: Refactor to use __free() for cxl_root allocation in cxl_find_nvdimm_bridge() cxl: Fix device reference leak in cxl_port_perf_data_calculate() cxl: Convert find_cxl_root() to return a 'struct cxl_root *' cxl: Introduce put_cxl_root() helper cxl/port: Fix missing target list lock cxl/port: Fix decoder initialization when nr_targets > interleave_ways cxl/region: fix x9 interleave typo cxl/trace: Pass UUID explicitly to event traces cxl/region: use %pap format to print resource_size_t cxl/region: Add dev_dbg() detail on failure to allocate HPA space ...

base/node / acpi: Change 'node_hmem_attrs' to 'access_coordinates'

2023-12-22T22:23:13Z

Dan Williams suggested changing the struct 'node_hmem_attrs' to 'access_coordinates' [1]. The struct is a container of r/w-latency and r/w-bandwidth numbers. Moving forward, this container will also be used by CXL to store the performance characteristics of each link hop in the PCIE/CXL topology. So, where node_hmem_attrs is just the access parameters of a memory-node, access_coordinates applies more broadly to hardware topology characteristics. The observation is that seemed like an exercise in having the application identify "where" it falls on a spectrum of bandwidth and latency needs. For the tuple of read/write-latency and read/write-bandwidth, "coordinates" is not a perfect fit. Sometimes it is just conveying values in isolation and not a "location" relative to other performance points, but in the end this data is used to identify the performance operation point of a given memory-node. [2] Link: http://lore.kernel.org/r/64471313421f7_1b66294d5@dwillia2-xfh.jf.intel.com.notmuch/ Link: https://lore.kernel.org/linux-cxl/645e6215ee0de_1e6f2945e@dwillia2-xfh.jf.intel.com.notmuch/ Suggested-by: Dan Williams Reviewed-by: Dan Williams Reviewed-by: Jonathan Cameron Signed-off-by: Dave Jiang Acked-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/170319615734.2212653.15319394025985499185.stgit@djiang5-mobl3 Signed-off-by: Dan Williams

driver core: mark remaining local bus_type variables as const

2023-12-21T12:56:30Z

Now that the driver core can properly handle constant struct bus_type, change the local driver core bus_type variables to be a constant structure as well, placing them into read-only memory which can not be modified at runtime. Cc: Ira Weiny Cc: Rafael J. Wysocki Cc: David Hildenbrand Cc: Oscar Salvador Cc: Kevin Hilman Cc: Ulf Hansson Cc: Len Brown Acked-by: William Breathitt Gray Acked-by: Dave Ertman Link: https://lore.kernel.org/r/2023121908-paver-follow-cc21@gregkh Signed-off-by: Greg Kroah-Hartman

base/node.c: initialize the accessor list before registering

2023-12-07T02:35:23Z

The current code registers the node as available in the node array before initializing the accessor list. This makes it so that anything which might access the accessor list as a result of allocations will cause an undefined memory access. In one example, an extension to access hmat data during interleave caused this undefined access as a result of a bulk allocation that occurs during node initialization but before the accessor list is initialized. Initialize the accessor list before making the node generally available to the global system. Fixes: 08d9dbe72b1f ("node: Link memory nodes to their compute nodes") Signed-off-by: Gregory Price Link: https://lore.kernel.org/r/20231030044239.971756-1-gregory.price@memverge.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'driver-core-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2023-09-01T16:43:18Z

Pull driver core updates from Greg KH: "Here is a small set of driver core updates and additions for 6.6-rc1. Included in here are: - stable kernel documentation updates - class structure const work from Ivan on various subsystems - kernfs tweaks - driver core tests! - kobject sanity cleanups - kobject structure reordering to save space - driver core error code handling fixups - other minor driver core cleanups All of these have been in linux-next for a while with no reported problems" * tag 'driver-core-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits) driver core: Call in reversed order in device_platform_notify_remove() driver core: Return proper error code when dev_set_name() fails kobject: Remove redundant checks for whether ktype is NULL kobject: Add sanity check for kset->kobj.ktype in kset_register() drivers: base: test: Add missing MODULE_* macros to root device tests drivers: base: test: Add missing MODULE_* macros for platform devices tests drivers: base: Free devm resources when unregistering a device drivers: base: Add basic devm tests for platform devices drivers: base: Add basic devm tests for root devices kernfs: fix missing kernfs_iattr_rwsem locking docs: stable-kernel-rules: mention that regressions must be prevented docs: stable-kernel-rules: fine-tune various details docs: stable-kernel-rules: make the examples for option 1 a proper list docs: stable-kernel-rules: move text around to improve flow docs: stable-kernel-rules: improve structure by changing headlines base/node: Remove duplicated include kernfs: attach uuid for every kernfs and report it in fsid kernfs: add stub helper for kernfs_generic_poll() x86/resctrl: make pseudo_lock_class a static const structure x86/MSR: make msr_class a static const structure ...

mm,thp: fix nodeN/meminfo output alignment

2023-08-21T20:38:01Z

Add one more space to FileHugePages and FilePmdMapped, so the output is aligned with other rows in /sys/devices/system/node/nodeN/meminfo. Link: https://lkml.kernel.org/r/be861b50-a790-e041-bcb0-2a987dcfd1a@google.com Signed-off-by: Hugh Dickins Reviewed-by: David Hildenbrand Cc: Alexey Dobriyan Signed-off-by: Andrew Morton

base/node: Remove duplicated include

2023-08-12T11:00:56Z

Remove duplicated include of linux/hugetlb.h. Resolves checkincludes message. Signed-off-by: GUO Zihua Link: https://lore.kernel.org/r/20230810120008.25297-1-guozihua@huawei.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'driver-core-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2023-07-03T19:56:23Z

Pull driver core updates from Greg KH: "Here are a small set of changes for 6.5-rc1 for some driver core changes. Included in here are: - device property cleanups to make it easier to write "agnostic" drivers when regards to the firmware layer underneath them (DT vs. ACPI) - debugfs documentation updates - devres additions - sysfs documentation and changes to handle empty directory creation logic better - tiny kernfs optimizations - other tiny changes All of these have been in linux-next for a while with no reported problems" * tag 'driver-core-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: sysfs: Skip empty folders creation sysfs: Improve readability by following the kernel coding style drivers: fwnode: fix fwnode_irq_get[_byname]() ata: ahci_platform: Make code agnostic to OF/ACPI device property: Implement device_is_compatible() ACPI: Move ACPI_DEVICE_CLASS() to mod_devicetable.h base/node: Use 'property' to identify an access parameter driver core: device.h: add some missing kerneldocs kernfs: fix missing kernfs_idr_lock to remove an ID from the IDR isa: Remove unnecessary checks MAINTAINERS: add entry for auxiliary bus debugfs: Correct the 'debugfs_create_str' docs serial: qcom_geni: Comment use of devm_krealloc rather than devm_krealloc_array iio: adc: Use devm_krealloc_array hwmon: pmbus: Use devm_krealloc_array