wireguard-linux/arch/mips/boot/compressed, branch jd/orphan-parallel

MIPS: Loongson-3: Enable COP2 usage in kernel

2020-09-21T20:15:03Z

Loongson-3's COP2 is Multi-Media coprocessor, it is disabled in kernel mode by default. However, gslq/gssq (16-bytes load/store instructions) overrides the instruction format of lwc2/swc2. If we wan't to use gslq/ gssq for optimization in kernel, we should enable COP2 usage in kernel. Please pay attention that in this patch we only enable COP2 in kernel, which means it will lose ST0_CU2 when a process go to user space (try to use COP2 in user space will trigger an exception and then grab COP2, which is similar to FPU). And as a result, we need to modify the context switching code because the new scheduled process doesn't contain ST0_CU2 in its THERAD_STATUS probably. For zboot, we disable gslq/gssq be generated by toolchain. Signed-off-by: Huacai Chen Signed-off-by: Thomas Bogendoerfer

MIPS: Add support for ZSTD-compressed kernels

2020-09-03T08:13:24Z

Add support for self-extracting kernels with a ZSTD compression. Tested on a kernel for the GCW-Zero, it allows to reduce the size of the kernel file from 4.1 MiB with gzip to 3.5 MiB with ZSTD, and boots just as fast. Compressed kernels are now also compiled with -D__DISABLE_EXPORTS in order to disable the EXPORT_SYMBOL() macros inside of lib/zstd/decompress.c. Signed-off-by: Paul Cercueil Signed-off-by: Thomas Bogendoerfer

MIPS: Truncate link address into 32bit for 32bit kernel

2020-05-07T08:31:01Z

LLD failed to link vmlinux with 64bit load address for 32bit ELF while bfd will strip 64bit address into 32bit silently. To fix LLD build, we should truncate load address provided by platform into 32bit for 32bit kernel. Signed-off-by: Jiaxun Yang Link: https://github.com/ClangBuiltLinux/linux/issues/786 Link: https://sourceware.org/bugzilla/show_bug.cgi?id=25784 Reviewed-by: Fangrui Song Reviewed-by: Kees Cook Tested-by: Nathan Chancellor Cc: Maciej W. Rozycki Tested-by: Nick Desaulniers Signed-off-by: Thomas Bogendoerfer

.gitignore: add SPDX License Identifier

2020-03-25T10:50:48Z

Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

kbuild: rename hostprogs-y/always to hostprogs/always-y

2020-02-03T16:53:07Z

In old days, the "host-progs" syntax was used for specifying host programs. It was renamed to the current "hostprogs-y" in 2004. It is typically useful in scripts/Makefile because it allows Kbuild to selectively compile host programs based on the kernel configuration. This commit renames like follows: always -> always-y hostprogs-y -> hostprogs So, scripts/Makefile will look like this: always-$(CONFIG_BUILD_BIN2C) += ... always-$(CONFIG_KALLSYMS) += ... ... hostprogs := $(always-y) $(always-m) I think this makes more sense because a host program is always a host program, irrespective of the kernel configuration. We want to specify which ones to compile by CONFIG options, so always-y will be handier. The "always", "hostprogs-y", "hostprogs-m" will be kept for backward compatibility for a while. Signed-off-by: Masahiro Yamada

MIPS: Prevent link failure with kcov instrumentation

2019-12-18T23:15:03Z

__sanitizer_cov_trace_pc() is not linked in and causing link failure if KCOV_INSTRUMENT is enabled. Fix this by disabling instrumentation for compressed image. Signed-off-by: Jouni Hogander Signed-off-by: Paul Burton Cc: Lukas Bulwahn Cc: linux-mips@vger.kernel.org

MIPS: fix build on non-linux hosts

2019-06-19T22:55:53Z

calc_vmlinuz_load_addr.c requires SZ_64K to be defined for alignment purposes. It included "../../../../include/linux/sizes.h" to define that size, however "sizes.h" tries to include which assumes linux system headers. These may not exist eg. the following error was encountered when building Linux for OpenWrt under macOS: In file included from arch/mips/boot/compressed/calc_vmlinuz_load_addr.c:16: arch/mips/boot/compressed/../../../../include/linux/sizes.h:11:10: fatal error: 'linux/const.h' file not found ^~~~~~~~~~ Change makefile to force building on local linux headers instead of system headers. Also change eye-watering relative reference in include file spec. Thanks to Jo-Philip Wich & Petr Štetiar for assistance in tracking this down & fixing. Suggested-by: Jo-Philipp Wich Signed-off-by: Petr Štetiar Signed-off-by: Kevin Darbyshire-Bryant Signed-off-by: Paul Burton Cc: linux-mips@vger.kernel.org

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

MIPS: Align kernel load address to 64KB

2018-11-21T05:05:39Z

KEXEC needs the new kernel's load address to be aligned on a page boundary (see sanity_check_segment_list()), but on MIPS the default vmlinuz load address is only explicitly aligned to 16 bytes. Since the largest PAGE_SIZE supported by MIPS kernels is 64KB, increase the alignment calculated by calc_vmlinuz_load_addr to 64KB. Signed-off-by: Huacai Chen Signed-off-by: Paul Burton Patchwork: https://patchwork.linux-mips.org/patch/21131/ Cc: Ralf Baechle Cc: James Hogan Cc: Steven J . Hill Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang Cc: Zhangjin Wu Cc: # 2.6.36+

kbuild: rename LDFLAGS to KBUILD_LDFLAGS

2018-08-23T23:22:08Z

Commit a0f97e06a43c ("kbuild: enable 'make CFLAGS=...' to add additional options to CC") renamed CFLAGS to KBUILD_CFLAGS. Commit 222d394d30e7 ("kbuild: enable 'make AFLAGS=...' to add additional options to AS") renamed AFLAGS to KBUILD_AFLAGS. Commit 06c5040cdb13 ("kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP") renamed CPPFLAGS to KBUILD_CPPFLAGS. For some reason, LDFLAGS was not renamed. Using a well-known variable like LDFLAGS may result in accidental override of the variable. Kbuild generally uses KBUILD_ prefixed variables for the internally appended options, so here is one more conversion to sanitize the naming convention. I did not touch Makefiles under tools/ since the tools build system is a different world. Signed-off-by: Masahiro Yamada Acked-by: Kirill A. Shutemov Reviewed-by: Palmer Dabbelt