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authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2017-04-19 15:52:26 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2017-04-24 12:07:58 +0300
commitead514d5fb30a0889d51c0f0e35c3e346165a955 (patch)
treea6fb97f2cfce93e5c8ff10351cd3f4763ae1fc4e /arch/powerpc/Kconfig
parent2f59be5b970b503ca8db1cb723b155e455ebac8e (diff)
downloadlinux-ead514d5fb30a0889d51c0f0e35c3e346165a955.tar.xz
powerpc/kprobes: Add support for KPROBES_ON_FTRACE
Allow kprobes to be placed on ftrace _mcount() call sites. This optimization avoids the use of a trap, by riding on ftrace infrastructure. This depends on HAVE_DYNAMIC_FTRACE_WITH_REGS which depends on MPROFILE_KERNEL, which is only currently enabled on powerpc64le with newer toolchains. Based on the x86 code by Masami. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/Kconfig')
-rw-r--r--arch/powerpc/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 97a8bc8a095c..f1c43d78056c 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -142,6 +142,7 @@ config PPC
select HAVE_IRQ_EXIT_ON_IRQ_STACK
select HAVE_KERNEL_GZIP
select HAVE_KPROBES
+ select HAVE_KPROBES_ON_FTRACE
select HAVE_KRETPROBES
select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_MEMBLOCK