powerpc: tracing: Give hypervisor call tracepoints access to arguments

While most users of the hcall tracepoints will only want the opcode
and return code, some will want all the arguments.  To avoid the
complexity of using varargs we pass a pointer to the register save
area, which contains all the arguments.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/powerpc/include/asm/trace.h b/arch/powerpc/include/asm/trace.h
index 9b01c0e43b55..cbe2297d68b6 100644
--- a/arch/powerpc/include/asm/trace.h
+++ b/arch/powerpc/include/asm/trace.h
@@ -82,9 +82,9 @@ extern void hcall_tracepoint_unregfunc(void);
 
 TRACE_EVENT_FN(hcall_entry,
 
-        TP_PROTO(unsigned long opcode),
+        TP_PROTO(unsigned long opcode, unsigned long *args),
 
-        TP_ARGS(opcode),
+        TP_ARGS(opcode, args),
 
         TP_STRUCT__entry(
                 __field(unsigned long, opcode)
@@ -101,9 +101,10 @@ TRACE_EVENT_FN(hcall_entry,
 
 TRACE_EVENT_FN(hcall_exit,
 
-        TP_PROTO(unsigned long opcode, unsigned long retval),
+        TP_PROTO(unsigned long opcode, unsigned long retval,
+                unsigned long *retbuf),
 
-        TP_ARGS(opcode, retval),
+        TP_ARGS(opcode, retval, retbuf),
 
         TP_STRUCT__entry(
                 __field(unsigned long, opcode)