uprobes/powerpc: Add dependency on single step emulation

Uprobes uses emulate_step in sstep.c, but we haven't explicitly specified
the dependency. On pseries HAVE_HW_BREAKPOINT protects us, but 44x has no
such luxury.

Consolidate other users that depend on sstep and create a new config option.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Suzuki K. Poulose <suzuki@in.ibm.com>
Cc: linuxppc-dev@ozlabs.org
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 684fa6456797..4b27edbdb799 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -276,6 +276,10 @@ config PPC_ADV_DEBUG_DAC_RANGE
         depends on PPC_ADV_DEBUG_REGS && 44x
         default y
 
+config PPC_EMULATE_SSTEP
+        bool
+        default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"