kernel/linux.git/drivers/of/Kconfig, branch v6.18.21

Merge tag 'kbuild-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2024-11-30T21:41:50+00:00

Pull Kbuild updates from Masahiro Yamada: - Add generic support for built-in boot DTB files - Enable TAB cycling for dialog buttons in nconfig - Fix issues in streamline_config.pl - Refactor Kconfig - Add support for Clang's AutoFDO (Automatic Feedback-Directed Optimization) - Add support for Clang's Propeller, a profile-guided optimization. - Change the working directory to the external module directory for M= builds - Support building external modules in a separate output directory - Enable objtool for *.mod.o and additional kernel objects - Use lz4 instead of deprecated lz4c - Work around a performance issue with "git describe" - Refactor modpost * tag 'kbuild-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (85 commits) kbuild: rename .tmp_vmlinux.kallsyms0.syms to .tmp_vmlinux0.syms gitignore: Don't ignore 'tags' directory kbuild: add dependency from vmlinux to resolve_btfids modpost: replace tdb_hash() with hash_str() kbuild: deb-pkg: add python3:native to build dependency genksyms: reduce indentation in export_symbol() modpost: improve error messages in device_id_check() modpost: rename alias symbol for MODULE_DEVICE_TABLE() modpost: rename variables in handle_moddevtable() modpost: move strstarts() to modpost.h modpost: convert do_usb_table() to a generic handler modpost: convert do_of_table() to a generic handler modpost: convert do_pnp_device_entry() to a generic handler modpost: convert do_pnp_card_entries() to a generic handler modpost: call module_alias_printf() from all do_*_entry() functions modpost: pass (struct module *) to do_*_entry() functions modpost: remove DEF_FIELD_ADDR_VAR() macro modpost: deduplicate MODULE_ALIAS() for all drivers modpost: introduce module_alias_printf() helper modpost: remove unnecessary check in do_acpi_entry() ...

of: Allow overlay kunit tests to run CONFIG_OF_OVERLAY=n

2024-11-15T20:03:28+00:00

Some configurations want to enable CONFIG_KUNIT without enabling CONFIG_OF_OVERLAY. The kunit overlay code already skips if CONFIG_OF_OVERLAY isn't enabled, so this select here isn't really doing anything besides making it easier to run the tests without them skipping. Remove the select and move the config setting to the drivers/of/.kunitconfig file so that the overlay tests can be run with or without CONFIG_OF_OVERLAY set to test either behavior. Fixes: 5c9dd72d8385 ("of: Add a KUnit test for overlays and test managed APIs") Signed-off-by: Stephen Boyd Acked-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20241016212016.887552-1-sboyd@kernel.org Signed-off-by: Rob Herring (Arm)

kbuild: add generic support for built-in boot DTBs

2024-11-04T08:53:09+00:00

Some architectures embed boot DTBs in vmlinux. A potential issue for these architectures is a race condition during parallel builds because Kbuild descends into arch/*/boot/dts/ twice. One build thread is initiated by the 'dtbs' target, which is a prerequisite of the 'all' target in the top-level Makefile: ifdef CONFIG_OF_EARLY_FLATTREE all: dtbs endif For architectures that support the built-in boot dtb, arch/*/boot/dts/ is visited also during the ordinary directory traversal in order to build obj-y objects that wrap DTBs. Since these build threads are unaware of each other, they can run simultaneously during parallel builds. This commit introduces a generic build rule to scripts/Makefile.vmlinux to support embedded boot DTBs in a race-free way. Architectures that want to use this rule need to select CONFIG_GENERIC_BUILTIN_DTB. After the migration, Makefiles under arch/*/boot/dts/ will be visited only once to build only *.dtb files. This change also aims to unify the CONFIG options used for built-in DTBs support. Currently, different architectures use different CONFIG options for the same purposes. With this commit, the CONFIG options will be unified as follows: - CONFIG_GENERIC_BUILTIN_DTB This enables the generic rule for built-in boot DTBs. This will be renamed to CONFIG_BUILTIN_DTB after all architectures migrate to the generic rule. - CONFIG_BUILTIN_DTB_NAME This specifies the path to the embedded DTB. (relative to arch/*/boot/dts/) - CONFIG_BUILTIN_DTB_ALL If this is enabled, all DTB files compiled under arch/*/boot/dts/ are embedded into vmlinux. Only used by MIPS. Signed-off-by: Masahiro Yamada

of: Add a KUnit test for overlays and test managed APIs

2024-07-29T22:33:12+00:00

Test the KUnit test managed overlay APIs. Confirm that platform devices are created and destroyed properly. This provides us confidence that the test managed APIs work correctly and can be relied upon to provide tests with fake platform devices and device nodes via overlays compiled into the kernel image. Cc: Rob Herring Cc: Saravana Kannan Cc: Daniel Latypov Cc: Brendan Higgins Reviewed-by: David Gow Cc: Rae Moar Reviewed-by: Rob Herring (Arm) Signed-off-by: Stephen Boyd Link: https://lore.kernel.org/r/20240718210513.3801024-5-sboyd@kernel.org

of: Add KUnit test to confirm DTB is loaded

2024-03-08T18:50:39+00:00

Add a KUnit test that confirms a DTB has been loaded, i.e. there is a root node, and that the of_have_populated_dt() API works properly. We skip the test when CONFIG_OF_EARLY_FLATREE=n because in that case we know architecture code hasn't called unflatten_(and_copy_)?device_tree() which would populate some sort of root node. Cc: Rob Herring Cc: Frank Rowand Reviewed-by: David Gow Cc: Brendan Higgins Signed-off-by: Stephen Boyd Link: https://lore.kernel.org/r/20240217010557.2381548-8-sboyd@kernel.org Signed-off-by: Rob Herring

of: Create of_root if no dtb provided by firmware

2024-03-08T18:50:39+00:00

When enabling CONFIG_OF on a platform where 'of_root' is not populated by firmware, we end up without a root node. In order to apply overlays and create subnodes of the root node, we need one. Create this root node by unflattening an empty builtin dtb. If firmware provides a flattened device tree (FDT) then the FDT is unflattened via setup_arch(). Otherwise, the call to unflatten(_and_copy)?_device_tree() will create an empty root node. We make of_have_populated_dt() return true only if the DTB was loaded by firmware so that existing callers don't change behavior after this patch. The call in the of platform code is removed because it prevents overlays from creating platform devices when the empty root node is used. [sboyd@kernel.org: Update of_have_populated_dt() to treat this empty dtb as not populated. Drop setup_of() initcall] Signed-off-by: Frank Rowand Link: https://lore.kernel.org/r/20230317053415.2254616-2-frowand.list@gmail.com Cc: Rob Herring Signed-off-by: Stephen Boyd Link: https://lore.kernel.org/r/20240217010557.2381548-3-sboyd@kernel.org Signed-off-by: Rob Herring

of: make OF_EARLY_FLATTREE depend on HAS_IOMEM

2023-07-10T14:48:35+00:00

On s390 systems (aka mainframes), it has classic channel devices for networking and permanent storage that are currently even more common than PCI devices. Hence it could have a fully functional s390 kernel with CONFIG_PCI=n, then the relevant iomem mapping functions [including ioremap(), devm_ioremap(), etc.] are not available. In LKP error report at below on s390: ------ ld: kernel/dma/coherent.o: in function `dma_init_coherent_memory': coherent.c:(.text+0x102): undefined reference to `memremap' ld: coherent.c:(.text+0x226): undefined reference to `memunmap' ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory': coherent.c:(.text+0x8b8): undefined reference to `memunmap' ld: kernel/dma/coherent.o: in function `dma_release_coherent_memory': coherent.c:(.text+0x9aa): undefined reference to `memunmap' ------ In the config file, several Kconfig options are: ------ '# CONFIG_PCI is not set' CONFIG_OF_EARLY_FLATTREE=y CONFIG_DMA_DECLARE_COHERENT=y ------ So, enabling OF_EARLY_FLATTREE will select DMA_DECLARE_COHERENT and cause above building errors even though they are not needed because CONFIG_PCI is disabled. Here let OF_EARLY_FLATTREE depend on HAS_IOMEM so that it won't be built to cause compiling error if PCI is unset. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/ Signed-off-by: Baoquan He Cc: Rob Herring Cc: Frank Rowand Cc: devicetree@vger.kernel.org Link: https://lore.kernel.org/r/20230707135852.24292-9-bhe@redhat.com Signed-off-by: Rob Herring

of: address: always use dma_default_coherent for default coherency

2023-04-07T05:38:28+00:00

As for now all arches have dma_default_coherent reflecting default DMA coherency for of devices, so there is no need to have a standalone config option. Signed-off-by: Jiaxun Yang Reviewed-by: Rob Herring Acked-by: Michael Ellerman (powerpc) Signed-off-by: Christoph Hellwig

of: update kconfig unittest help

2023-02-17T21:46:20+00:00

Add more information about the impact the of unittests have on the live devicetree and why the tests should only be enabled for developer kernels. Add information about processing the test output such that the results are more complete and comprehendable. Signed-off-by: Frank Rowand Link: https://lore.kernel.org/r/20230213185702.395776-4-frowand.list@gmail.com Signed-off-by: Rob Herring

of: net: move of_net under net/

2021-10-07T12:39:51+00:00

Rob suggests to move of_net.c from under drivers/of/ somewhere to the networking code. Suggested-by: Rob Herring Signed-off-by: Jakub Kicinski Reviewed-by: Rob Herring Signed-off-by: David S. Miller