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authorLinus Torvalds <torvalds@linux-foundation.org>2018-06-13 08:40:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-13 08:40:34 -0700
commitbe779f03d563981c65cc7417cc5e0dbbc5b89d30 (patch)
treece0638b1f449e2fe45419567ee287e2c97847836 /arch/powerpc
parentd290ef9305ebaaac884ae0350bfc243dd01d354d (diff)
parent00979ce4fcc90d488c7f27f750097adc6b11bd07 (diff)
downloadlinux-be779f03d563981c65cc7417cc5e0dbbc5b89d30.tar.bz2
Merge tag 'kbuild-v4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull more Kbuild updates from Masahiro Yamada: - fix some bugs introduced by the recent Kconfig syntax extension - add some symbols about compiler information in Kconfig, such as CC_IS_GCC, CC_IS_CLANG, GCC_VERSION, etc. - test compiler capability for the stack protector in Kconfig, and clean-up Makefile - test compiler capability for GCC-plugins in Kconfig, and clean-up Makefile - allow to enable GCC-plugins for COMPILE_TEST - test compiler capability for KCOV in Kconfig and correct dependency - remove auto-detect mode of the GCOV format, which is now more nicely handled in Kconfig - test compiler capability for mprofile-kernel on PowerPC, and clean-up Makefile - misc cleanups * tag 'kbuild-v4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: linux/linkage.h: replace VMLINUX_SYMBOL_STR() with __stringify() kconfig: fix localmodconfig sh: remove no-op macro VMLINUX_SYMBOL() powerpc/kbuild: move -mprofile-kernel check to Kconfig Documentation: kconfig: add recommended way to describe compiler support gcc-plugins: disable GCC_PLUGIN_STRUCTLEAK_BYREF_ALL for COMPILE_TEST gcc-plugins: allow to enable GCC_PLUGINS for COMPILE_TEST gcc-plugins: test plugin support in Kconfig and clean up Makefile gcc-plugins: move GCC version check for PowerPC to Kconfig kcov: test compiler capability in Kconfig and correct dependency gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT arm64: move GCC version check for ARCH_SUPPORTS_INT128 to Kconfig kconfig: add CC_IS_CLANG and CLANG_VERSION kconfig: add CC_IS_GCC and GCC_VERSION stack-protector: test compiler capability in Kconfig and drop AUTO mode kbuild: fix endless syncconfig in case arch Makefile sets CROSS_COMPILE
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/Kconfig18
-rw-r--r--arch/powerpc/Makefile13
-rw-r--r--arch/powerpc/include/asm/module.h2
-rw-r--r--arch/powerpc/kernel/module_64.c4
-rw-r--r--arch/powerpc/kernel/trace/ftrace.c6
-rwxr-xr-xarch/powerpc/tools/gcc-check-mprofile-kernel.sh1
6 files changed, 9 insertions, 35 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index eaba5920234d..9f2b75fe2c2d 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -190,7 +190,7 @@ config PPC
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_TRACER
- select HAVE_GCC_PLUGINS
+ select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC
select HAVE_GENERIC_GUP
select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
select HAVE_IDE
@@ -461,23 +461,9 @@ config LD_HEAD_STUB_CATCH
If unsure, say "N".
-config DISABLE_MPROFILE_KERNEL
- bool "Disable use of mprofile-kernel for kernel tracing"
- depends on PPC64 && CPU_LITTLE_ENDIAN
- default y
- help
- Selecting this options disables use of the mprofile-kernel ABI for
- kernel tracing. That will cause options such as live patching
- (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
- be disabled also.
-
- If you have a toolchain which supports mprofile-kernel, then you can
- disable this. Otherwise leave it enabled. If you're not sure, say
- "Y".
-
config MPROFILE_KERNEL
depends on PPC64 && CPU_LITTLE_ENDIAN
- def_bool !DISABLE_MPROFILE_KERNEL
+ def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
config HOTPLUG_CPU
bool "Support for enabling/disabling CPUs"
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 9b52e42e581b..bd06a3ccda31 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -161,18 +161,7 @@ CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
endif
ifdef CONFIG_MPROFILE_KERNEL
- ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
- CC_FLAGS_FTRACE := -pg -mprofile-kernel
- KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
- else
- # If the user asked for mprofile-kernel but the toolchain doesn't
- # support it, emit a warning and deliberately break the build later
- # with mprofile-kernel-not-supported. We would prefer to make this an
- # error right here, but then the user would never be able to run
- # oldconfig to change their configuration.
- $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
- CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
- endif
+ CC_FLAGS_FTRACE := -pg -mprofile-kernel
endif
CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
diff --git a/arch/powerpc/include/asm/module.h b/arch/powerpc/include/asm/module.h
index d8374f984f39..d61b0818e267 100644
--- a/arch/powerpc/include/asm/module.h
+++ b/arch/powerpc/include/asm/module.h
@@ -14,7 +14,7 @@
#include <asm-generic/module.h>
-#ifdef CC_USING_MPROFILE_KERNEL
+#ifdef CONFIG_MPROFILE_KERNEL
#define MODULE_ARCH_VERMAGIC_FTRACE "mprofile-kernel "
#else
#define MODULE_ARCH_VERMAGIC_FTRACE ""
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 1b7419579820..b8d61e019d06 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -466,7 +466,7 @@ static unsigned long stub_for_addr(const Elf64_Shdr *sechdrs,
return (unsigned long)&stubs[i];
}
-#ifdef CC_USING_MPROFILE_KERNEL
+#ifdef CONFIG_MPROFILE_KERNEL
static bool is_mprofile_mcount_callsite(const char *name, u32 *instruction)
{
if (strcmp("_mcount", name))
@@ -753,7 +753,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
#ifdef CONFIG_DYNAMIC_FTRACE
-#ifdef CC_USING_MPROFILE_KERNEL
+#ifdef CONFIG_MPROFILE_KERNEL
#define PACATOC offsetof(struct paca_struct, kernel_toc)
diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c
index c076a32093fd..4bfbb54dee51 100644
--- a/arch/powerpc/kernel/trace/ftrace.c
+++ b/arch/powerpc/kernel/trace/ftrace.c
@@ -144,7 +144,7 @@ __ftrace_make_nop(struct module *mod,
return -EINVAL;
}
-#ifdef CC_USING_MPROFILE_KERNEL
+#ifdef CONFIG_MPROFILE_KERNEL
/* When using -mkernel_profile there is no load to jump over */
pop = PPC_INST_NOP;
@@ -188,7 +188,7 @@ __ftrace_make_nop(struct module *mod,
pr_err("Expected %08x found %08x\n", PPC_INST_LD_TOC, op);
return -EINVAL;
}
-#endif /* CC_USING_MPROFILE_KERNEL */
+#endif /* CONFIG_MPROFILE_KERNEL */
if (patch_instruction((unsigned int *)ip, pop)) {
pr_err("Patching NOP failed.\n");
@@ -324,7 +324,7 @@ int ftrace_make_nop(struct module *mod,
* They should effectively be a NOP, and follow formal constraints,
* depending on the ABI. Return false if they don't.
*/
-#ifndef CC_USING_MPROFILE_KERNEL
+#ifndef CONFIG_MPROFILE_KERNEL
static int
expected_nop_sequence(void *ip, unsigned int op0, unsigned int op1)
{
diff --git a/arch/powerpc/tools/gcc-check-mprofile-kernel.sh b/arch/powerpc/tools/gcc-check-mprofile-kernel.sh
index a7dd0e5d9f98..137f3376ac2b 100755
--- a/arch/powerpc/tools/gcc-check-mprofile-kernel.sh
+++ b/arch/powerpc/tools/gcc-check-mprofile-kernel.sh
@@ -24,5 +24,4 @@ echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
2> /dev/null | grep -q "_mcount" && \
exit 1
-echo "OK"
exit 0