linux-dev/arch/powerpc/boot/wrapper, branch master

kbuild: build init/built-in.a just once

2022-09-28T19:40:15Z

Kbuild builds init/built-in.a twice; first during the ordinary directory descending, second from scripts/link-vmlinux.sh. We do this because UTS_VERSION contains the build version and the timestamp. We cannot update it during the normal directory traversal since we do not yet know if we need to update vmlinux. UTS_VERSION is temporarily calculated, but omitted from the update check. Otherwise, vmlinux would be rebuilt every time. When Kbuild results in running link-vmlinux.sh, it increments the version number in the .version file and takes the timestamp at that time to really fix UTS_VERSION. However, updating the same file twice is a footgun. To avoid nasty timestamp issues, all build artifacts that depend on init/built-in.a are atomically generated in link-vmlinux.sh, where some of them do not need rebuilding. To fix this issue, this commit changes as follows: [1] Split UTS_VERSION out to include/generated/utsversion.h from include/generated/compile.h include/generated/utsversion.h is generated just before the vmlinux link. It is generated under include/generated/ because some decompressors (s390, x86) use UTS_VERSION. [2] Split init_uts_ns and linux_banner out to init/version-timestamp.c from init/version.c init_uts_ns and linux_banner contain UTS_VERSION. During the ordinary directory descending, they are compiled with __weak and used to determine if vmlinux needs relinking. Just before the vmlinux link, they are compiled without __weak to embed the real version and timestamp. Signed-off-by: Masahiro Yamada

powerpc: Fix all occurences of "the the"

2022-05-22T05:59:43Z

Rather than waiting for the bots to fix these one-by-one, fix all occurences of "the the" throughout arch/powerpc. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220518142629.513007-1-mpe@ellerman.id.au

powerpc/boot: Set LC_ALL=C in wrapper script

2021-10-27T11:31:22Z

While trying to build a simple Image for ACADIA platform, I got the following error: WRAP arch/powerpc/boot/simpleImage.acadia INFO: Uncompressed kernel (size 0x6ae7d0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) powerpc64-linux-gnu-ld : mode d'émulation non reconnu : -T Émulations prises en charge : elf64ppc elf32ppc elf32ppclinux elf32ppcsim elf64lppc elf32lppc elf32lppclinux elf32lppcsim make[1]: *** [arch/powerpc/boot/Makefile:424 : arch/powerpc/boot/simpleImage.acadia] Erreur 1 make: *** [arch/powerpc/Makefile:285 : simpleImage.acadia] Erreur 2 Trying again with V=1 shows the following command powerpc64-linux-gnu-ld -m -T arch/powerpc/boot/zImage.lds -Ttext 0x700000 --no-dynamic-linker -o arch/powerpc/boot/simpleImage.acadia -Map wrapper.map arch/powerpc/boot/fixed-head.o arch/powerpc/boot/simpleboot.o ./zImage.3278022.o arch/powerpc/boot/wrapper.a The argument of '-m' is missing. This is due to the wrapper script calling 'objdump -p vmlinux' and looking for 'file format', whereas the output of objdump is: vmlinux: format de fichier elf32-powerpc En-tête de programme: LOAD off 0x00010000 vaddr 0xc0000000 paddr 0x00000000 align 2**16 filesz 0x0069e1d4 memsz 0x006c128c flags rwx NOTE off 0x0064591c vaddr 0xc063591c paddr 0x0063591c align 2**2 filesz 0x00000054 memsz 0x00000054 flags --- Add LC_ALL=C at the beginning of the wrapper script in order to get the output expected by the script: vmlinux: file format elf32-powerpc Program Header: LOAD off 0x00010000 vaddr 0xc0000000 paddr 0x00000000 align 2**16 filesz 0x0069e1d4 memsz 0x006c128c flags rwx NOTE off 0x0064591c vaddr 0xc063591c paddr 0x0063591c align 2**2 filesz 0x00000054 memsz 0x00000054 flags --- Signed-off-by: Christophe Leroy Acked-by: Segher Boessenkool Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/a9ff3bc98035f63b122c051f02dc47c7aed10430.1635256089.git.christophe.leroy@csgroup.eu

powerpc: retire sbc8548 board support

2021-08-26T14:48:11Z

The support was for this was mainlined 13 years ago, in v2.6.25 [0e0fffe88767] just around the ppc --> powerpc migration. I believe the board was introduced a year or two before that, so it is roughly a 15 year old platform - with the CPU speed and memory size that was typical for that era. I haven't had one of these boards for several years, and availability was discontinued several years before that. Given that, there is no point in adding a burden to testing coverage that builds all possible defconfigs, so it makes sense to remove it. Of course it will remain in the git history forever, for anyone who happens to find a functional board and wants to tinker with it. Acked-by: Scott Wood Signed-off-by: Paul Gortmaker Signed-off-by: Michael Ellerman

powerpc/boot: Add a boot wrapper for Microwatt

2021-06-21T11:16:32Z

This allows microwatt's kernel to be built with an embedded device tree. Load to arch/powerpc/boot/dtbImage.microwatt to 0x500000: mw_debug -b fpga stop load arch/powerpc/boot/dtbImage.microwatt 500000 start Signed-off-by: Joel Stanley Signed-off-by: Paul Mackerras Reviewed-by: Segher Boessenkool Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/YMwX19wym3kQ7guu@thinks.paulus.ozlabs.org

kbuild: replace LANG=C with LC_ALL=C

2021-05-01T15:43:35Z

LANG gives a weak default to each LC_* in case it is not explicitly defined. LC_ALL, if set, overrides all other LC_* variables. LANG < LC_CTYPE, LC_COLLATE, LC_MONETARY, LC_NUMERIC, ... < LC_ALL This is why documentation such as [1] suggests to set LC_ALL in build scripts to get the deterministic result. LANG=C is not strong enough to override LC_* that may be set by end users. [1]: https://reproducible-builds.org/docs/locales/ Signed-off-by: Masahiro Yamada Acked-by: Michael Ellerman (powerpc) Reviewed-by: Matthias Maennich Acked-by: Matthieu Baerts (mptcp) Reviewed-by: Greg Kroah-Hartman

powerpc/boot/wrapper: Add "-z notext" flag to disable diagnostic

2020-11-26T11:05:43Z

The "-z notext" flag disables reporting an error if DT_TEXTREL is set. ld.lld: error: can't create dynamic relocation R_PPC64_ADDR64 against symbol: _start in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output >>> defined in >>> referenced by crt0.o:(.text+0x8) in archive arch/powerpc/boot/wrapper.a The BFD linker disables this by default (though it's configurable in current versions). LLD enables this by default. So we add the flag to keep LLD from emitting the error. Signed-off-by: Bill Wendling Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201120224034.191382-2-morbo@google.com

powerpc/boot/wrapper: Add "-z rodynamic" when using LLD

2020-11-26T11:05:43Z

Normally all read-only sections precede SHF_WRITE sections. .dynamic and .got have the SHF_WRITE flag; .dynamic probably because of DT_DEBUG. LLD emits an error when this happens, so use "-z rodynamic" to mark .dynamic as read-only. Signed-off-by: Bill Wendling Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201118223910.2711337-1-morbo@google.com

powerpc: Remove Xilinx PPC405/PPC440 support

2020-05-28T13:24:34Z

The latest Xilinx design tools called ISE and EDK has been released in October 2013. New tool doesn't support any PPC405/PPC440 new designs. These platforms are no longer supported and tested. PowerPC 405/440 port is orphan from 2013 by commit cdeb89943bfc ("MAINTAINERS: Fix incorrect status tag") and commit 19624236cce1 ("MAINTAINERS: Update Grant's email address and maintainership") that's why it is time to remove the support fot these platforms. Signed-off-by: Michal Simek Signed-off-by: Christophe Leroy Acked-by: Arnd Bergmann Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/8c593895e2cb57d232d85ce4d8c3a1aa7f0869cc.1590079968.git.christophe.leroy@csgroup.eu

powerpc/ps3: Add check for otheros image size

2020-05-20T13:39:56Z

The ps3's otheros flash loader has a size limit of 16 MiB for the uncompressed image. If that limit will be reached output the flash image file as 'otheros-too-big.bld'. Signed-off-by: Geoff Levand Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/897c2a59-378e-7c9b-3976-d0a0def90913@infradead.org