kernel/linux.git/arch/riscv/boot/Makefile, branch linux-7.0.y

riscv: boot: Always make Image from vmlinux, not vmlinux.unstripped

2025-12-31T02:57:55+00:00

Since commit 4b47a3aefb29 ("kbuild: Restore pattern to avoid stripping .rela.dyn from vmlinux") vmlinux has .rel*.dyn preserved. Therefore, use vmlinux to produce Image, not vmlinux.unstripped. Doing so fixes booting a RELOCATABLE=y Image with kexec. The problem is caused by this chain of events: - Since commit 3e86e4d74c04 ("kbuild: keep .modinfo section in vmlinux.unstripped"), vmlinux.unstripped gets a .modinfo section. - The .modinfo section has SHF_ALLOC, so it ends up in Image, at the end of it. - The Image header's image_size field does not expect to include .modinfo and does not account for it, since it should not be in Image. - If .modinfo is large enough, the file size of Image ends up larger than image_size, which eventually leads to it failing sanity_check_segment_list(). Using vmlinux instead of vmlinux.unstripped means that the unexpected .modinfo section is gone from Image, fixing the file size problem. Cc: stable@vger.kernel.org Fixes: 3e86e4d74c04 ("kbuild: keep .modinfo section in vmlinux.unstripped") Signed-off-by: Vivian Wang Reviewed-by: Nathan Chancellor Tested-by: Han Gao Link: https://patch.msgid.link/20251230-riscv-vmlinux-not-unstripped-v1-1-15f49df880df@iscas.ac.cn Signed-off-by: Paul Walmsley

kbuild: Create intermediate vmlinux build with relocations preserved

2025-03-16T15:29:50+00:00

The imperative paradigm used to build vmlinux, extract some info from it or perform some checks on it, and subsequently modify it again goes against the declarative paradigm that is usually employed for defining make rules. In particular, the Makefile.postlink files that consume their input via an output rule result in some dodgy logic in the decompressor makefiles for RISC-V and x86, given that the vmlinux.relocs input file needed to generate the arch-specific relocation tables may not exist or be out of date, but cannot be constructed using the ordinary Make dependency based rules, because the info needs to be extracted while vmlinux is in its ephemeral, non-stripped form. So instead, for architectures that require the static relocations that are emitted into vmlinux when passing --emit-relocs to the linker, and are subsequently stripped out again, introduce an intermediate vmlinux target called vmlinux.unstripped, and organize the reset of the build logic accordingly: - vmlinux.unstripped is created only once, and not updated again - build rules under arch/*/boot can depend on vmlinux.unstripped without running the risk of the data disappearing or being out of date - the final vmlinux generated by the build is not bloated with static relocations that are never needed again after the build completes. Signed-off-by: Ard Biesheuvel Signed-off-by: Masahiro Yamada

riscv: boot: add Image.xz support

2024-09-02T03:43:27+00:00

The Image.* targets existed for other compressors already. Bootloader support is needed for decompression. This is for CONFIG_EFI_ZBOOT=n. With CONFIG_EFI_ZBOOT=y, XZ was already available. Comparision with Linux 6.10 RV64GC tinyconfig (in KiB): 1027 Image 594 Image.gz 541 Image.zst 510 Image.lzma 474 Image.xz Link: https://lkml.kernel.org/r/20240721133633.47721-17-lasse.collin@tukaani.org Signed-off-by: Lasse Collin Reviewed-by: Emil Renner Berthing Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Jules Maselbas Cc: Catalin Marinas Cc: Greg Kroah-Hartman Cc: Herbert Xu Cc: Joel Stanley Cc: Jonathan Corbet Cc: Jubin Zhong Cc: Krzysztof Kozlowski Cc: Michael Ellerman Cc: Randy Dunlap Cc: Rui Li Cc: Sam James Cc: Simon Glass Cc: Thomas Gleixner Cc: Will Deacon Signed-off-by: Andrew Morton

riscv: boot: remove duplicated targets line

2024-07-24T13:14:06+00:00

The "targets:" is duplicated in another line, remove the one with less targets. Signed-off-by: Jisheng Zhang Reviewed-by: Emil Renner Berthing Link: https://lore.kernel.org/r/20240613153053.3835-1-jszhang@kernel.org Signed-off-by: Palmer Dabbelt

Makefile: remove redundant tool coverage variables

2024-05-14T14:35:48+00:00

Now Kbuild provides reasonable defaults for objtool, sanitizers, and profilers. Remove redundant variables. Note: This commit changes the coverage for some objects: - include arch/mips/vdso/vdso-image.o into UBSAN, GCOV, KCOV - include arch/sparc/vdso/vdso-image-*.o into UBSAN - include arch/sparc/vdso/vma.o into UBSAN - include arch/x86/entry/vdso/extable.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vdso-image-*.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vdso32-setup.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vma.o into GCOV, KCOV - include arch/x86/um/vdso/vma.o into KASAN, GCOV, KCOV I believe these are positive effects because all of them are kernel space objects. Signed-off-by: Masahiro Yamada Reviewed-by: Kees Cook Tested-by: Roberto Sassu

riscv: boot: Fix creation of loader.bin

2023-11-06T17:39:26+00:00

When flashing loader.bin for K210 using kflash: [ERROR] This is an ELF file and cannot be programmed to flash directly: arch/riscv/boot/loader.bin Before, loader.bin relied on "OBJCOPYFLAGS := -O binary" in the main RISC-V Makefile to create a boot image with the right format. With this removed, the image is now created in the wrong (ELF) format. Fix this by adding an explicit rule. Fixes: 505b02957e74f0c5 ("riscv: Remove duplicate objcopy flag") Signed-off-by: Geert Uytterhoeven Reviewed-by: Damien Le Moal Link: https://lore.kernel.org/r/1086025809583809538dfecaa899892218f44e7e.1698159066.git.geert+renesas@glider.be Signed-off-by: Palmer Dabbelt

riscv: Use --emit-relocs in order to move .rela.dyn in init

2023-04-19T14:46:33+00:00

To circumvent an issue where placing the relocations inside the init sections produces empty relocations, use --emit-relocs. But to avoid carrying those relocations in vmlinux, use an intermediate vmlinux.relocs file which is a copy of vmlinux *before* stripping its relocations. Suggested-by: Björn Töpel Suggested-by: Nick Desaulniers Signed-off-by: Alexandre Ghiti Link: https://lore.kernel.org/r/20230329045329.64565-7-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt

riscv: boot: add zstd support

2022-12-09T00:44:42+00:00

Support build the zstd compressed Image.zst. Similar as other compressed formats, the Image.zst is not self-decompressing and the bootloader still needs to handle decompression before launching the kernel image. Signed-off-by: Jisheng Zhang Link: https://lore.kernel.org/r/20221123150257.3108-1-jszhang@kernel.org Signed-off-by: Palmer Dabbelt

riscv: efi: enable generic EFI compressed boot

2022-09-20T07:50:30+00:00

Wire up the generic EFI zboot support for RISC-V. Signed-off-by: Ard Biesheuvel Acked-by: Palmer Dabbelt Tested-by: Conor Dooley

riscv: move the (z)install rules to arch/riscv/Makefile

2021-09-11T06:08:26+00:00

Currently, the (z)install targets in arch/riscv/Makefile descend into arch/riscv/boot/Makefile to invoke the shell script, but there is no good reason to do so. arch/riscv/Makefile can run the shell script directly. Signed-off-by: Masahiro Yamada Signed-off-by: Palmer Dabbelt