Re: [PATCH v3 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2)

From	Torsten Duwe <duwe@lst.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH v3 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2)
Date	2015-10-26 19:00 +0100
Message-ID	<qnUdQ-2MV-11@gated-at.bofh.it> (permalink)
References	<qnU4a-2JD-13@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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  * Makefile:
    - globally use -mprofile-kernel in case it's configured.
  * arch/powerpc/Kconfig / kernel/trace/Kconfig:
    - declare that ppc64 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 | 7 +++++++
 kernel/trace/Kconfig  | 5 +++++
 3 files changed, 14 insertions(+)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 9a7057e..0e6011c 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
 	select HAVE_FUNCTION_TRACER
 	select HAVE_FUNCTION_GRAPH_TRACER
+	select HAVE_MPROFILE_KERNEL
 	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 b9b4af2..25d0034 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -133,6 +133,13 @@ else
 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 endif
 
+ifeq ($(CONFIG_PPC64),y)
+ifdef CONFIG_HAVE_MPROFILE_KERNEL
+CC_FLAGS_FTRACE	:= -pg $(call cc-option,-mprofile-kernel)
+KBUILD_CPPFLAGS	+= -DCC_USING_MPROFILE_KERNEL
+endif
+endif
+
 CFLAGS-$(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 1153c43..dbcb635 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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Thread

[PATCH v3 0/8] ftrace with regs + live patching for ppc64 LE (ABI  v2) Torsten Duwe <duwe@lst.de> - 2015-10-26 18:50 +0100
  [PATCH v3 5/8] ppc64 ftrace: disable profiling for some functions Torsten Duwe <duwe@lst.de> - 2015-10-26 19:00 +0100
  Re: [PATCH v3 0/8] ftrace with regs + live patching for ppc64 LE  (ABI v2) Torsten Duwe <duwe@lst.de> - 2015-10-26 19:00 +0100
  [PATCH v3 4/8] ppc64 ftrace_with_regs: spare early boot and low  level Torsten Duwe <duwe@lst.de> - 2015-10-26 19:00 +0100
  [PATCH v3 2/8] ppc use ftrace_modify_all_code default Torsten Duwe <duwe@lst.de> - 2015-10-26 19:00 +0100
  [PATCH v3 6/8] ppc64 ftrace: disable profiling for some files Torsten Duwe <duwe@lst.de> - 2015-10-26 19:10 +0100
  [PATCH v3 3/8] ppc64 ftrace_with_regs configuration variables Torsten Duwe <duwe@lst.de> - 2015-10-26 19:10 +0100
  [PATCH v3 8/8] Enable LIVEPATCH to be configured on ppc64le and  add livepatch.o if it is selected. Torsten Duwe <duwe@lst.de> - 2015-10-26 19:10 +0100
  [PATCH v3 1/8] ppc64le FTRACE_WITH_REGS implementation Torsten Duwe <duwe@lst.de> - 2015-10-26 19:10 +0100
  [PATCH v3 7/8] Implement kernel live patching for ppc64le (ABIv2) Torsten Duwe <duwe@lst.de> - 2015-10-26 19:10 +0100

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