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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-04-19 18:22:26 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-24 19:07:58 +1000 |
| commit | ead514d5fb30a0889d51c0f0e35c3e346165a955 (patch) | |
| tree | a6fb97f2cfce93e5c8ff10351cd3f4763ae1fc4e /arch/powerpc/Kconfig | |
| parent | 2f59be5b970b503ca8db1cb723b155e455ebac8e (diff) | |
| download | linux-ead514d5fb30a0889d51c0f0e35c3e346165a955.tar.gz linux-ead514d5fb30a0889d51c0f0e35c3e346165a955.tar.bz2 linux-ead514d5fb30a0889d51c0f0e35c3e346165a955.zip | |
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/Kconfig | 1 |
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 |