| Message ID | 20231208055501.2916202-7-samuel.holland@sifive.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Unified cross-architecture kernel-mode FPU API | expand |
On Thu, Dec 07, 2023 at 09:54:36PM -0800, Samuel Holland wrote: > LoongArch already provides kernel_fpu_begin() and kernel_fpu_end() in > asm/fpu.h, so it only needs to add kernel_fpu_available() and export > the CFLAGS adjustments. Looks good: Reviewed-by: Christoph Hellwig <hch@lst.de>
On 12/8/23 13:54, Samuel Holland wrote: > LoongArch already provides kernel_fpu_begin() and kernel_fpu_end() in > asm/fpu.h, so it only needs to add kernel_fpu_available() and export > the CFLAGS adjustments. > > Signed-off-by: Samuel Holland <samuel.holland@sifive.com> > --- > > arch/loongarch/Kconfig | 1 + > arch/loongarch/Makefile | 5 ++++- > arch/loongarch/include/asm/fpu.h | 1 + > 3 files changed, 6 insertions(+), 1 deletion(-) This is all intuitive wrapping, so: Acked-by: WANG Xuerui <git@xen0n.name> Thanks!
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index ee123820a476..65d4475565b8 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -15,6 +15,7 @@ config LOONGARCH select ARCH_HAS_CPU_FINALIZE_INIT select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_KCOV + select ARCH_HAS_KERNEL_FPU_SUPPORT if CPU_HAS_FPU select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PTE_SPECIAL diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile index 204b94b2e6aa..f5c4f7e921db 100644 --- a/arch/loongarch/Makefile +++ b/arch/loongarch/Makefile @@ -25,6 +25,9 @@ endif 32bit-emul = elf32loongarch 64bit-emul = elf64loongarch +CC_FLAGS_FPU := -mfpu=64 +CC_FLAGS_NO_FPU := -msoft-float + ifdef CONFIG_DYNAMIC_FTRACE KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY CC_FLAGS_FTRACE := -fpatchable-function-entry=2 @@ -46,7 +49,7 @@ ld-emul = $(64bit-emul) cflags-y += -mabi=lp64s endif -cflags-y += -pipe -msoft-float +cflags-y += -pipe $(CC_FLAGS_NO_FPU) LDFLAGS_vmlinux += -static -n -nostdlib # When the assembler supports explicit relocation hint, we must use it. diff --git a/arch/loongarch/include/asm/fpu.h b/arch/loongarch/include/asm/fpu.h index c2d8962fda00..3177674228f8 100644 --- a/arch/loongarch/include/asm/fpu.h +++ b/arch/loongarch/include/asm/fpu.h @@ -21,6 +21,7 @@ struct sigcontext; +#define kernel_fpu_available() cpu_has_fpu extern void kernel_fpu_begin(void); extern void kernel_fpu_end(void);
LoongArch already provides kernel_fpu_begin() and kernel_fpu_end() in asm/fpu.h, so it only needs to add kernel_fpu_available() and export the CFLAGS adjustments. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> --- arch/loongarch/Kconfig | 1 + arch/loongarch/Makefile | 5 ++++- arch/loongarch/include/asm/fpu.h | 1 + 3 files changed, 6 insertions(+), 1 deletion(-)