[PATCH v5 4/9] ppc64 ftrace_with_regs configuration variables

From	Torsten Duwe <duwe@lst.de>
Newsgroups	linux.kernel
Subject	[PATCH v5 4/9] ppc64 ftrace_with_regs configuration variables
Date	2015-12-04 16:40 +0100
Message-ID	<qC0CJ-4wp-5@gated-at.bofh.it> (permalink)
References	<qC0t3-4sT-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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  * Makefile:
    - globally use -mprofile-kernel in case it's configured
      and available.
  * arch/powerpc/Kconfig / kernel/trace/Kconfig:
    - declare that ppc64le HAVE_MPROFILE_KERNEL and
      HAVE_DYNAMIC_FTRACE_WITH_REGS, and use it.

Signed-off-by: Torsten Duwe <duwe@suse.de>
---
 arch/powerpc/Kconfig  |  2 ++
 arch/powerpc/Makefile | 10 ++++++++++
 kernel/trace/Kconfig  |  5 +++++
 3 files changed, 17 insertions(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index db49e0d..89b1a2a 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -97,8 +97,10 @@ config PPC
 	select OF_RESERVED_MEM
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_DYNAMIC_FTRACE
+	select HAVE_DYNAMIC_FTRACE_WITH_REGS if PPC64 && CPU_LITTLE_ENDIAN
 	select HAVE_FUNCTION_TRACER
 	select HAVE_FUNCTION_GRAPH_TRACER
+	select HAVE_MPROFILE_KERNEL if PPC64 && CPU_LITTLE_ENDIAN
 	select SYSCTL_EXCEPTION_TRACE
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select VIRT_TO_BUS if !PPC64
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 96efd82..2f9b527 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -133,6 +133,16 @@ else
 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 endif
 
+ifeq ($(CONFIG_PPC64),y)
+ifdef CONFIG_HAVE_MPROFILE_KERNEL
+CC_USING_MPROFILE_KERNEL := $(call cc-option,-mprofile-kernel)
+ifdef CC_USING_MPROFILE_KERNEL
+CC_FLAGS_FTRACE	:= -pg $(CC_USING_MPROFILE_KERNEL)
+KBUILD_CPPFLAGS	+= -DCC_USING_MPROFILE_KERNEL
+endif
+endif
+endif
+
 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index e45db6b..a138f6d 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -52,6 +52,11 @@ config HAVE_FENTRY
 	help
 	  Arch supports the gcc options -pg with -mfentry
 
+config HAVE_MPROFILE_KERNEL
+	bool
+	help
+	  Arch supports the gcc options -pg with -mprofile-kernel
+
 config HAVE_C_RECORDMCOUNT
 	bool
 	help
-- 
1.8.5.6

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[PATCH v5 0/9] ftrace with regs + live patching for ppc64 LE (ABI v2) Torsten Duwe <duwe@lst.de> - 2015-12-04 16:30 +0100
  [PATCH v5 5/9] ppc64 ftrace_with_regs: spare early boot and low level Torsten Duwe <duwe@lst.de> - 2015-12-04 16:30 +0100
  [PATCH v5 3/9] ppc use ftrace_modify_all_code default Torsten Duwe <duwe@lst.de> - 2015-12-04 16:30 +0100
  [PATCH v5 7/9] ppc64 ftrace: disable profiling for some files Torsten Duwe <duwe@lst.de> - 2015-12-04 16:30 +0100
  [PATCH v5 4/9] ppc64 ftrace_with_regs configuration variables Torsten Duwe <duwe@lst.de> - 2015-12-04 16:40 +0100

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