3 files changed, 4 insertions, 0 deletions

diff --git a/Documentation/powerpc/ptrace.txt b/Documentation/powerpc/ptrace.txt
index f2a7a3919772..99c5ce88d0fe 100644
--- a/Documentation/powerpc/ptrace.txt
+++ b/Documentation/powerpc/ptrace.txt
@@ -40,6 +40,7 @@ features will have bits indicating whether there is support for:
 #define PPC_DEBUG_FEATURE_INSN_BP_MASK          0x2
 #define PPC_DEBUG_FEATURE_DATA_BP_RANGE         0x4
 #define PPC_DEBUG_FEATURE_DATA_BP_MASK          0x8
+#define PPC_DEBUG_FEATURE_DATA_BP_DAWR          0x10
 
 2. PTRACE_SETHWDEBUG
 
diff --git a/arch/powerpc/include/uapi/asm/ptrace.h b/arch/powerpc/include/uapi/asm/ptrace.h
index 66b9ca4ee94a..77d2ed35b111 100644
--- a/arch/powerpc/include/uapi/asm/ptrace.h
+++ b/arch/powerpc/include/uapi/asm/ptrace.h
@@ -211,6 +211,7 @@ struct ppc_debug_info {
 #define PPC_DEBUG_FEATURE_INSN_BP_MASK          0x0000000000000002
 #define PPC_DEBUG_FEATURE_DATA_BP_RANGE         0x0000000000000004
 #define PPC_DEBUG_FEATURE_DATA_BP_MASK          0x0000000000000008
+#define PPC_DEBUG_FEATURE_DATA_BP_DAWR          0x0000000000000010
 
 #ifndef __ASSEMBLY__
 
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 10ade3c0c88a..3b14d320e69f 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -1644,6 +1644,8 @@ long arch_ptrace(struct task_struct *child, long request,
                 dbginfo.sizeof_condition = 0;
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
                 dbginfo.features = PPC_DEBUG_FEATURE_DATA_BP_RANGE;
+                if (cpu_has_feature(CPU_FTR_DAWR))
+                        dbginfo.features |= PPC_DEBUG_FEATURE_DATA_BP_DAWR;
 #else
                 dbginfo.features = 0;
 #endif /* CONFIG_HAVE_HW_BREAKPOINT */