linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH 0/9] LoongArch: Preliminary ClangBuiltLinux enablement
@ 2023-06-23 13:43 WANG Xuerui
  2023-06-23 13:43 ` [PATCH 1/9] LoongArch: Calculate various sizes in the linker script WANG Xuerui
                   ` (8 more replies)
  0 siblings, 9 replies; 21+ messages in thread
From: WANG Xuerui @ 2023-06-23 13:43 UTC (permalink / raw)
  To: Huacai Chen
  Cc: WANG Rui, Xi Ruoyao, loongarch, linux-kbuild, llvm, linux-kernel,
	WANG Xuerui

From: WANG Xuerui <git@xen0n.name>

Hi,

It's been a long time since the LoongArch port was upstreamed to LLVM,
and there seems to be evidence that Linux was successfully built with
Clang inside Loongson roughly around that time; however, a lot has
changed since then, and the Linux/LoongArch codebase now makes use of
more novel features that necessitate further work. (The enablement work
is tracked at [1].)

With this patch series and a patched LLVM/LLD ([2] for llvm-objcopy,
and [3] for LLD), a working kernel can be built with `make LLVM=1`;
although currently support for CONFIG_RELOCATABLE and CONFIG_MODULE is
still TODO, we've decided to post the series early to hopefully reduce
the rebase burden. The series contains several useful cleanups anyway.

Regarding how to merge this: because only Patch 8 is outside
arch/loongarch, I'd prefer the series to get merged through Huacai's
tree. The series applies cleanly on top of next-20230622.

Thanks go to the ClangBuiltLinux team, and LoongArch toolchain
maintainers from Loongson and the community alike; without your help
this would come much later, if at all (my free time has been steadily
dwindling this year already).

Your comments are welcome!

[1]: https://github.com/ClangBuiltLinux/linux/issues/1787
[2]: https://reviews.llvm.org/D153609
[3]: https://reviews.llvm.org/D138135

WANG Rui (2):
  LoongArch: Calculate various sizes in the linker script
  LoongArch: extable: Also recognize ABI names of registers

WANG Xuerui (7):
  LoongArch: Prepare for assemblers with proper FCSR bank support
  LoongArch: Make {read,write}_fcsr compatible with LLVM/Clang
  LoongArch: Make the CPUCFG and CSR ops simple aliases of compiler
    built-ins
  LoongArch: Simplify the invtlb wrappers
  LoongArch: Tweak CFLAGS for Clang compatibility
  Makefile: Add loongarch target flag for Clang compilation
  LoongArch: Mark Clang LTO as working

 arch/loongarch/Kconfig                 |  5 ++
 arch/loongarch/Makefile                | 14 ++++-
 arch/loongarch/include/asm/fpregdef.h  |  7 +++
 arch/loongarch/include/asm/gpr-num.h   | 30 ++++++++++
 arch/loongarch/include/asm/loongarch.h | 82 ++++++++------------------
 arch/loongarch/include/asm/tlb.h       | 45 +++++---------
 arch/loongarch/kernel/efi-header.S     |  6 +-
 arch/loongarch/kernel/head.S           |  8 +--
 arch/loongarch/kernel/traps.c          |  2 +-
 arch/loongarch/kernel/vmlinux.lds.S    |  7 +++
 arch/loongarch/lib/dump_tlb.c          |  6 +-
 arch/loongarch/mm/tlb.c                | 10 ++--
 arch/loongarch/vdso/Makefile           |  6 +-
 scripts/Makefile.clang                 |  1 +
 14 files changed, 122 insertions(+), 107 deletions(-)

-- 
2.40.0


^ permalink raw reply	[flat|nested] 21+ messages in thread

end of thread, other threads:[~2023-06-23 17:07 UTC | newest]

Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-06-23 13:43 [PATCH 0/9] LoongArch: Preliminary ClangBuiltLinux enablement WANG Xuerui
2023-06-23 13:43 ` [PATCH 1/9] LoongArch: Calculate various sizes in the linker script WANG Xuerui
2023-06-23 13:43 ` [PATCH 2/9] LoongArch: extable: Also recognize ABI names of registers WANG Xuerui
2023-06-23 13:43 ` [PATCH 3/9] LoongArch: Prepare for assemblers with proper FCSR bank support WANG Xuerui
2023-06-23 16:00   ` Huacai Chen
2023-06-23 13:43 ` [PATCH 4/9] LoongArch: Make {read,write}_fcsr compatible with LLVM/Clang WANG Xuerui
2023-06-23 16:03   ` Huacai Chen
2023-06-23 13:43 ` [PATCH 5/9] LoongArch: Make the CPUCFG and CSR ops simple aliases of compiler built-ins WANG Xuerui
2023-06-23 13:43 ` [PATCH 6/9] LoongArch: Simplify the invtlb wrappers WANG Xuerui
2023-06-23 15:57   ` Huacai Chen
2023-06-23 13:43 ` [PATCH 7/9] LoongArch: Tweak CFLAGS for Clang compatibility WANG Xuerui
2023-06-23 16:39   ` Nick Desaulniers
2023-06-23 16:53     ` Xi Ruoyao
2023-06-23 17:05     ` WANG Xuerui
2023-06-23 17:00   ` Xi Ruoyao
2023-06-23 17:06     ` WANG Xuerui
2023-06-23 13:43 ` [PATCH 8/9] Makefile: Add loongarch target flag for Clang compilation WANG Xuerui
2023-06-23 15:58   ` Huacai Chen
2023-06-23 16:31   ` Nick Desaulniers
2023-06-23 13:43 ` [PATCH 9/9] LoongArch: Mark Clang LTO as working WANG Xuerui
2023-06-23 16:52   ` Nick Desaulniers

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).