u-boot.git/scripts/Makefile.lib, branch v2022.07-rc6

Introduce Verifying Program Loader (VPL)

2022-05-02T13:58:13+00:00

Add support for VPL, a new phase of U-Boot. This runs after TPL. It is
responsible for selecting which SPL binary to run, based on a
verified-boot process.

Signed-off-by: Simon Glass

Makefile.lib: Re-use $(UBOOTINCLUDE) in dtc_cpp_flags

2022-04-12T12:02:54+00:00

As in ASL case use same basic set of the inclusions.

Signed-off-by: Andy Shevchenko

scripts: Makefile.lib: generate dsdt_generated.c instead of dsdt.c

2022-02-25T16:21:24+00:00

There is a conflict between the static file
lib/acpi/dsdt.c and the file dsdt.c generated
dynamicaly by scripts/Makefile.lib. When a
mrproper is done, the static file dsdt.c is
removed. If a build with acpi enabled is
launched after, the following error is raised:

  CC      lib/acpi/acpi_table.o
make[2]: *** No rule to make target 'lib/acpi/dsdt.asl', needed by 'lib/acpi/dsdt.c'.  Stop.
scripts/Makefile.build:394: recipe for target 'lib/acpi' failed

To avoid such error, the generated file is named
dsdt_generated.c instead of dstdt.c.

Signed-off-by: Philippe Reynes 
Tested-by: Heiko Thiery

introduce CONFIG_DEVICE_TREE_INCLUDES

2022-01-25T19:35:57+00:00

The build system already automatically looks for and includes an
in-tree *-u-boot.dtsi when building the control .dtb. However, there
are some things that are awkward to maintain in such an in-tree file,
most notably the metadata associated to public keys used for verified
boot.

The only "official" API to get that metadata into the .dtb is via
mkimage, as a side effect of building an actual signed image. But
there are multiple problems with that. First of all, the final U-Boot
(be it U-Boot proper or an SPL) image is built based on a binary
image, the .dtb, and possibly some other binary artifacts. So
modifying the .dtb after the build requires the meta-buildsystem
(Yocto, buildroot, whatnot) to know about and repeat some of the steps
that are already known to and handled by U-Boot's build system,
resulting in needless duplication of code. It's also somewhat annoying
and inconsistent to have a .dtb file in the build folder which is not
generated by the command listed in the corresponding .cmd file (that
of course applies to any generated file).

So the contents of the /signature node really needs to be baked into
the .dtb file when it is first created, which means providing the
relevant data in the form of a .dtsi file. One could in theory put
that data into the *-u-boot.dtsi file, but it's more convenient to be
able to provide it externally: For example, when developing for a
customer, it's common to use a set of dummy keys for development,
while the consultants do not (and should not) have access to the
actual keys used in production. For such a setup, it's easier if the
keys used are chosen via the meta-buildsystem and the path(s) patched
in during the configure step. And of course, nothing prevents anybody
from having DEVICE_TREE_INCLUDES point at files maintained in git, or
for that matter from including the public key metadata in the
*-u-boot.dtsi directly and ignore this feature.

There are other uses for this, e.g. in combination with ENV_IMPORT_FDT
it can be used for providing the contents of the /config/environment
node, so I don't want to tie this exclusively to use for verified
boot.

Reviewed-by: Simon Glass 
Signed-off-by: Rasmus Villemoes 
Fix doc formatting error (make htmldocs)
Signed-off-by: Simon Glass

acpi: Allow include files within the board directory

2022-01-25T18:44:36+00:00

Some .asl files include others using the iasl 'include' directive. This
needs to be able to find the files referenced.

For an out-of-tree build the source directory is not the current
directory. Moreover, U-Boot preprocesses the input file and puts the
result in the output directory. So iasl does not know where the real
source file came from.

Add a -I option to produce the correct behaviour. We could add an option
to not preprocess the .asl source, but for now that seems unnecessary.

Signed-off-by: Simon Glass

video: Support showing the U-Boot logo

2021-12-26T22:32:46+00:00

Show the U-Boot logo by default. This is only 7KB in size so seems like
a useful default for boards that enable a display.

If SPLASH_SCREEN is enabled, it is not enabled by default, so as not to
conflict with that feature.

Also disable it for tests, since we don't want to complicate the output.

Signed-off-by: Simon Glass

fdt: Make it easier to debug u-boot.dtsi files

2021-12-23T15:24:39+00:00

At present one must hack the Makefile to see what is going on with these
files. Also it doesn't quite work correctly.

Fix this by using an environment variable for debugging. Update the docs
also.

Signed-off-by: Simon Glass

efi_loader: Fix link of EFI apps with ld.lld

2021-10-21T01:46:04+00:00

When compiling U-Boot with ld.lld as the linker, the helloworld EFI app
example fails to link:

LD      lib/efi_loader/helloworld_efi.so
ld.lld: error: section: .dynamic is not contiguous with other relro
                        sections

LLD will always create RELRO program header regardless of target
emulation, whereas BFD may automatically disable it for unsupported
targets. Add -znorelro to disable it explicitly in all cases.

Signed-off-by: Alistair Delva 
Cc: Heinrich Schuchardt 
Cc: Nick Desaulniers 
Reviewed-by: Heinrich Schuchardt

kconfig / kbuild: Re-sync with Linux 4.20

2021-07-14T20:57:35+00:00

Align Kconfig and Kbuild logic to Linux 4.20 release with minimal impact
on files outside of this scope.

Our previous Kconfig sync was done by commit 587e4a429698 ("kconfig /
kbuild: Re-sync with Linux 4.19").

As part of this re-sync, a few related changes from previous Linux
releases were found to have been missed and merged in, and are not in
the following list.

The imported Linux commits are:

[From prior to v4.19]
b1e0d8b70fa3 kbuild: Fix gcc -x syntax
a4353898980c kconfig: add CC_IS_GCC and GCC_VERSION
469cb7376c06 kconfig: add CC_IS_CLANG and CLANG_VERSION

[From v4.19 to v4.20]
487c7c7702ab kbuild: prefix Makefile.dtbinst path with $(srctree) unconditionally
0d91bf584fe5 kbuild: remove old check for CFLAGS use
25815cf5ffec kbuild: hide most of targets when running config or mixed targets
00d78ab2ba75 kbuild: remove dead code in cmd_files calculation in top Makefile
23066c3f4e21 Compiler Attributes: enable -Wstringop-truncation on W=1 (gcc >= 8)
37c8a5fafa3b kbuild: consolidate Devicetree dtb build rules
80463f1b7bf9 kbuild: add --include-dir flag only for out-of-tree build
77ec0c20c7e0 kbuild: remove VERSION and PATCHLEVEL from $(objtree)/Makefile
74bc0c09b2da kbuild: remove user ID check in scripts/mkmakefile
4fd61277f662 kbuild: do not pass $(objtree) to scripts/mkmakefile
80d0dda3a4e5 kbuild: simplify command line creation in scripts/mkmakefile
fb073a4b473e kbuild: add -Wno-pointer-sign flag unconditionally
9df3e7a7d7d6 kbuild: add -Wno-unused-but-set-variable flag unconditionally
69ea912fda74 kbuild: remove unneeded link_multi_deps
7d0ea2524202 kbuild: use 'else ifeq' for checksrc to improve readability
04c459d20448 kconfig: remove oldnoconfig target
0085b4191f3e kconfig: remove silentoldconfig target
3f80babd9ca4 kbuild: remove unused cc-fullversion variable
2cd3faf87d2d merge_config.sh: Allow to define config prefix
076f421da5d4 kbuild: replace cc-name test with CONFIG_CC_IS_CLANG
6bbe4385d035 kconfig: merge_config: avoid false positive matches from comment lines

[From post v4.20]
885480b08469 Makefile: Move -Wno-unused-but-set-variable out of GCC only block

There are a number of changes related to additional warnings as well as
being able to drop cc-name entirely that have been omitted for now as
additional work is required first.

Cc: Masahiro Yamada 
Signed-off-by: Tom Rini

build: support building with Link Time Optimizations

2021-05-24T18:21:30+00:00

Add plumbing for building U-Boot with Link Time Optimizations.

When building with LTO, $(PLATFORM_LIBS) has to be in --whole-archive /
--no-whole-archive group, otherwise some functions declared in assembly
may not be resolved and linking may fail.

Note: clang may throw away linker list symbols it thinks are unused when
compiling with LTO. To force these symbols to be included, we refer to
them via the __ADDRESSABLE macro in a C file generated from compiled
built-in.o files before linking.

Signed-off-by: Marek Behún 
Reviewed-by: Simon Glass