diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 2 | ||||
| -rw-r--r-- | lib/Makefile | 25 | ||||
| -rw-r--r-- | lib/test_fpu_glue.c | 5 |
3 files changed, 7 insertions, 25 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c1c1b19525a5..f4384fd60a76 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2926,7 +2926,7 @@ config TEST_FREE_PAGES config TEST_FPU tristate "Test floating point operations in kernel space" - depends on X86 && !KCOV_INSTRUMENT_ALL + depends on ARCH_HAS_KERNEL_FPU_SUPPORT && !KCOV_INSTRUMENT_ALL help Enable this option to add /sys/kernel/debug/selftest_helpers/test_fpu which will trigger a sequence of floating point operations. This is used diff --git a/lib/Makefile b/lib/Makefile index 87f8803587ae..3b1769045651 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -110,31 +110,10 @@ CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE) obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o obj-$(CONFIG_TEST_OBJPOOL) += test_objpool.o -# -# CFLAGS for compiling floating point code inside the kernel. x86/Makefile turns -# off the generation of FPU/SSE* instructions for kernel proper but FPU_FLAGS -# get appended last to CFLAGS and thus override those previous compiler options. -# -FPU_CFLAGS := -msse -msse2 -ifdef CONFIG_CC_IS_GCC -# Stack alignment mismatch, proceed with caution. -# GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3 -# (8B stack alignment). -# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383 -# -# The "-msse" in the first argument is there so that the -# -mpreferred-stack-boundary=3 build error: -# -# -mpreferred-stack-boundary=3 is not between 4 and 12 -# -# can be triggered. Otherwise gcc doesn't complain. -FPU_CFLAGS += -mhard-float -FPU_CFLAGS += $(call cc-option,-msse -mpreferred-stack-boundary=3,-mpreferred-stack-boundary=4) -endif - obj-$(CONFIG_TEST_FPU) += test_fpu.o test_fpu-y := test_fpu_glue.o test_fpu_impl.o -CFLAGS_test_fpu_impl.o += $(FPU_CFLAGS) +CFLAGS_test_fpu_impl.o += $(CC_FLAGS_FPU) +CFLAGS_REMOVE_test_fpu_impl.o += $(CC_FLAGS_NO_FPU) # Some KUnit files (hooks.o) need to be built-in even when KUnit is a module, # so we can't just use obj-$(CONFIG_KUNIT). diff --git a/lib/test_fpu_glue.c b/lib/test_fpu_glue.c index 85963d7be826..eef282a2715f 100644 --- a/lib/test_fpu_glue.c +++ b/lib/test_fpu_glue.c @@ -17,7 +17,7 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/debugfs.h> -#include <asm/fpu/api.h> +#include <linux/fpu.h> #include "test_fpu.h" @@ -38,6 +38,9 @@ static struct dentry *selftest_dir; static int __init test_fpu_init(void) { + if (!kernel_fpu_available()) + return -EINVAL; + selftest_dir = debugfs_create_dir("selftest_helpers", NULL); if (!selftest_dir) return -ENOMEM; |