linux.git/lib/Kconfig, branch v6.12.80

pldmfw: Select CRC32 when PLDMFW is selected

2025-06-27T10:11:42+00:00

[ Upstream commit 1224b218a4b9203656ecc932152f4c81a97b4fcc ]

pldmfw calls crc32 code and depends on it being enabled, else
there is a link error as follows. So PLDMFW should select CRC32.

  lib/pldmfw/pldmfw.o: In function `pldmfw_flash_image':
  pldmfw.c:(.text+0x70f): undefined reference to `crc32_le_base'

This problem was introduced by commit b8265621f488 ("Add pldmfw library
for PLDM firmware update").

It manifests as of commit d69ea414c9b4 ("ice: implement device flash
update via devlink").

And is more likely to occur as of commit 9ad19171b6d6 ("lib/crc: remove
unnecessary prompt for CONFIG_CRC32 and drop 'default y'").

Found by chance while exercising builds based on tinyconfig.

Fixes: b8265621f488 ("Add pldmfw library for PLDM firmware update")
Signed-off-by: Simon Horman 
Reviewed-by: Jacob Keller 
Link: https://patch.msgid.link/20250613-pldmfw-crc32-v1-1-f3fad109eee6@kernel.org
Signed-off-by: Jakub Kicinski 
Signed-off-by: Sasha Levin

dim: make DIMLIB dependent on NET

2024-06-26T00:15:06+00:00

DIMLIB's capabilities are supplied by the dim, net_dim, and
rdma_dim objects, and dim's interfaces solely act as a base for
net_dim and rdma_dim and are not explicitly used anywhere else.
rdma_dim is utilized by the infiniband driver, while net_dim
is for network devices, excluding the soc/fsl driver.

In this patch, net_dim relies on some NET's interfaces, thus
DIMLIB needs to explicitly depend on the NET Kconfig.

The soc/fsl driver uses the functions provided by net_dim, so
it also needs to depend on NET.

Signed-off-by: Heng Qi 
Reviewed-by: Simon Horman 
Link: https://patch.msgid.link/20240621101353.107425-3-hengqi@linux.alibaba.com
Signed-off-by: Jakub Kicinski

cpumask: limit FORCE_NR_CPUS to just the UP case

2024-06-18T16:00:04+00:00

Hardcoding the number of CPUs at compile time does improve code
generation, but if you get it wrong the result will be confusion.

We already limited this earlier to only "experts" (see commit
fe5759d5bfda "cpumask: limit visibility of FORCE_NR_CPUS"), but with
distro kernel configs often having EXPERT enabled, that turns out to not
be much of a limit.

To quote the philosophers at Disney: "Everyone can be an expert. And
when everyone's an expert, no one will be".

There's a runtime warning if you then set nr_cpus to anything but the
forced number, but apparently that can be ignored too [1] and by then
it's pretty much too late anyway.

If we had some real way to limit this to "embedded only", maybe it would
be worth it, but let's see if anybody even notices that the option is
gone.  We need to simplify kernel configuration anyway.

Link: https://lore.kernel.org/all/20240618105036.208a8860@rorschach.local.home/ [1]
Reported-by: Steven Rostedt 
Cc: Masami Hiramatsu 
Cc: Mark Rutland 
Cc: Mathieu Desnoyers 
Cc: Paul McKenney 
Cc: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Yury Norov 
Signed-off-by: Linus Torvalds

lib: Allow for the DIM library to be modular

2024-05-07T23:42:45+00:00

Allow the Dynamic Interrupt Moderation (DIM) library to be built as a
module. This is particularly useful in an Android GKI (Google Kernel
Image) configuration where everything is built as a module, including
Ethernet controller drivers. Having to build DIMLIB into the kernel
image with potentially no user is wasteful.

Signed-off-by: Florian Fainelli 
Reviewed-by: Alexander Lobakin 
Link: https://lore.kernel.org/r/20240506175040.410446-1-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski

PCI: Move pci_iomap.c to drivers/pci/

2024-02-12T16:35:40+00:00

The entirety of pci_iomap.c is guarded by an #ifdef CONFIG_PCI. It,
consequently, does not belong to lib/ because it is not generic
infrastructure.

Move pci_iomap.c to drivers/pci/ and implement the necessary changes to
Makefiles and Kconfigs.

Update MAINTAINERS file.

Update Documentation.

Link: https://lore.kernel.org/r/20240131090023.12331-3-pstanner@redhat.com
[bhelgaas: squash in https://lore.kernel.org/r/20240212150934.24559-1-pstanner@redhat.com]
Suggested-by: Danilo Krummrich 
Signed-off-by: Philipp Stanner 
Signed-off-by: Bjorn Helgaas 
Reviewed-by: Arnd Bergmann

lib/stackdepot: use fixed-sized slots for stack records

2023-12-11T00:51:44+00:00

Instead of storing stack records in stack depot pools one right after
another, use fixed-sized slots.

Add a new Kconfig option STACKDEPOT_MAX_FRAMES that allows to select the
size of the slot in frames.  Use 64 as the default value, which is the
maximum stack trace size both KASAN and KMSAN use right now.

Also add descriptions for other stack depot Kconfig options.

This is preparatory patch for implementing the eviction of stack records
from the stack depot.

Link: https://lkml.kernel.org/r/dce7d030a99ff61022509665187fac45b0827298.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov 
Cc: Alexander Potapenko 
Cc: Dmitry Vyukov 
Cc: Evgenii Stepanov 
Cc: Marco Elver 
Cc: Oscar Salvador 
Cc: Vlastimil Babka 
Signed-off-by: Andrew Morton

Merge tag 'cxl-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl

2023-11-05T02:20:36+00:00

Pull CXL (Compute Express Link) updates from Dan Williams:
 "The main new functionality this time is work to allow Linux to
  natively handle CXL link protocol errors signalled via PCIe AER for
  current generation CXL platforms. This required some enlightenment of
  the PCIe AER core to workaround the fact that current generation RCH
  (Restricted CXL Host) platforms physically hide topology details and
  registers via a mechanism called RCRB (Root Complex Register Block).

  The next major highlight is reworks to address bugs in parsing region
  configurations for next generation VH (Virtual Host) topologies. The
  old broken algorithm is replaced with a simpler one that significantly
  increases the number of region configurations supported by Linux. This
  is again relevant for error handling so that forward and reverse
  address translation of memory errors can be carried out by Linux for
  memory regions instantiated by platform firmware.

  As for other cross-tree work, the ACPI table parsing code has been
  refactored for reuse parsing the "CDAT" structure which is an
  ACPI-like data structure that is reported by CXL devices. That work is
  in preparation for v6.8 support for CXL QoS. Think of this as dynamic
  generation of NUMA node topology information generated by Linux rather
  than platform firmware.

  Lastly, a number of internal object lifetime issues have been resolved
  along with misc. fixes and feature updates (decoders_committed sysfs
  ABI).

  Summary:

   - Add support for RCH (Restricted CXL Host) Error recovery

   - Fix several region assembly bugs

   - Fix mem-device lifetime issues relative to the sanitize command and
     RCH topology.

   - Refactor ACPI table parsing for CDAT parsing re-use in preparation
     for CXL QOS support"

* tag 'cxl-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (50 commits)
  lib/fw_table: Remove acpi_parse_entries_array() export
  cxl/pci: Change CXL AER support check to use native AER
  cxl/hdm: Remove broken error path
  cxl/hdm: Fix && vs || bug
  acpi: Move common tables helper functions to common lib
  cxl: Add support for reading CXL switch CDAT table
  cxl: Add checksum verification to CDAT from CXL
  cxl: Export QTG ids from CFMWS to sysfs as qos_class attribute
  cxl: Add decoders_committed sysfs attribute to cxl_port
  cxl: Add cxl_decoders_committed() helper
  cxl/core/regs: Rework cxl_map_pmu_regs() to use map->dev for devm
  cxl/core/regs: Rename phys_addr in cxl_map_component_regs()
  PCI/AER: Unmask RCEC internal errors to enable RCH downstream port error handling
  PCI/AER: Forward RCH downstream port-detected errors to the CXL.mem dev handler
  cxl/pci: Disable root port interrupts in RCH mode
  cxl/pci: Add RCH downstream port error logging
  cxl/pci: Map RCH downstream AER registers for logging protocol errors
  cxl/pci: Update CXL error logging to use RAS register address
  PCI/AER: Refactor cper_print_aer() for use by CXL driver module
  cxl/pci: Add RCH downstream port AER register discovery
  ...

Merge tag 'bcachefs-2023-10-30' of https://evilpiepirate.org/git/bcachefs

2023-10-30T21:09:38+00:00

Pull initial bcachefs updates from Kent Overstreet:
 "Here's the bcachefs filesystem pull request.

  One new patch since last week: the exportfs constants ended up
  conflicting with other filesystems that are also getting added to the
  global enum, so switched to new constants picked by Amir.

  The only new non fs/bcachefs/ patch is the objtool patch that adds
  bcachefs functions to the list of noreturns. The patch that exports
  osq_lock() has been dropped for now, per Ingo"

* tag 'bcachefs-2023-10-30' of https://evilpiepirate.org/git/bcachefs: (2781 commits)
  exportfs: Change bcachefs fid_type enum to avoid conflicts
  bcachefs: Refactor memcpy into direct assignment
  bcachefs: Fix drop_alloc_keys()
  bcachefs: snapshot_create_lock
  bcachefs: Fix snapshot skiplists during snapshot deletion
  bcachefs: bch2_sb_field_get() refactoring
  bcachefs: KEY_TYPE_error now counts towards i_sectors
  bcachefs: Fix handling of unknown bkey types
  bcachefs: Switch to unsafe_memcpy() in a few places
  bcachefs: Use struct_size()
  bcachefs: Correctly initialize new buckets on device resize
  bcachefs: Fix another smatch complaint
  bcachefs: Use strsep() in split_devs()
  bcachefs: Add iops fields to bch_member
  bcachefs: Rename bch_sb_field_members -> bch_sb_field_members_v1
  bcachefs: New superblock section members_v2
  bcachefs: Add new helper to retrieve bch_member from sb
  bcachefs: bucket_lock() is now a sleepable lock
  bcachefs: fix crc32c checksum merge byte order problem
  bcachefs: Fix bch2_inode_delete_keys()
  ...

acpi: Move common tables helper functions to common lib

2023-10-28T03:48:03+00:00

Some of the routines in ACPI driver/acpi/tables.c can be shared with
parsing CDAT. CDAT is a device-provided data structure that is formatted
similar to a platform provided ACPI table. CDAT is used by CXL and can
exist on platforms that do not use ACPI. Split out the common routine
from ACPI to accommodate platforms that do not support ACPI and move that
to /lib. The common routines can be built outside of ACPI if
FIRMWARE_TABLES is selected.

Link: https://lore.kernel.org/linux-cxl/CAJZ5v0jipbtTNnsA0-o5ozOk8ZgWnOg34m34a9pPenTyRLj=6A@mail.gmail.com/
Suggested-by: "Rafael J. Wysocki" 
Reviewed-by: Hanjun Guo 
Reviewed-by: Jonathan Cameron 
Signed-off-by: Dave Jiang 
Acked-by: "Rafael J. Wysocki" 
Link: https://lore.kernel.org/r/169713683430.2205276.17899451119920103445.stgit@djiang5-mobl3
Signed-off-by: Dan Williams

bcache: move closures to lib/

2023-10-19T18:47:33+00:00

Prep work for bcachefs - being a fork of bcache it also uses closures

Signed-off-by: Kent Overstreet 
Acked-by: Coly Li 
Reviewed-by: Randy Dunlap