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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2025-05-26 21:41:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2025-05-26 21:41:14 -0700 |
| commit | 914873bc7df913db988284876c16257e6ab772c6 (patch) | |
| tree | 11021d2fcf07be9252580277826ac997579db23c /arch/x86/Makefile | |
| parent | 24244df067c5514ad72b8ad371208b1139dfd0f0 (diff) | |
| parent | ad9b861824ac55d81431815fffaaff5e981badc1 (diff) | |
| download | linux-next-914873bc7df913db988284876c16257e6ab772c6.tar.gz linux-next-914873bc7df913db988284876c16257e6ab772c6.zip | |
Merge tag 'x86-build-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 build updates from Ingo Molnar:
"Add the CONFIG_X86_NATIVE_CPU=y build option to locally optimize the
kernel build with '-march=native'"
* tag 'x86-build-2025-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/kbuild/64: Restrict clang versions that can use '-march=native'
x86/kbuild/64: Test for the availability of the -mtune=native compiler flag
x86/kbuild/64: Add the CONFIG_X86_NATIVE_CPU option to locally optimize the kernel with '-march=native'
Diffstat (limited to 'arch/x86/Makefile')
| -rw-r--r-- | arch/x86/Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 53daf4654f6c..1913d342969b 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -173,8 +173,13 @@ else # Use -mskip-rax-setup if supported. KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup) +ifdef CONFIG_X86_NATIVE_CPU + KBUILD_CFLAGS += -march=native + KBUILD_RUSTFLAGS += -Ctarget-cpu=native +else KBUILD_CFLAGS += -march=x86-64 -mtune=generic KBUILD_RUSTFLAGS += -Ctarget-cpu=x86-64 -Ztune-cpu=generic +endif KBUILD_CFLAGS += -mno-red-zone KBUILD_CFLAGS += -mcmodel=kernel |