powerpc/mm: Trace tlbia instruction

Add a trace point for tlbia (Translation Lookaside Buffer Invalidate
All) instruction.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/trace.h

@@ -201,6 +201,21 @@ TRACE_EVENT(tlbie,
 		__entry->r)
 );
 
+TRACE_EVENT(tlbia,
+
+	TP_PROTO(unsigned long id),
+	TP_ARGS(id),
+	TP_STRUCT__entry(
+		__field(unsigned long, id)
+		),
+
+	TP_fast_assign(
+		__entry->id = id;
+		),
+
+	TP_printk("ctx.id=0x%lx", __entry->id)
+);
+
 #endif /* _TRACE_POWERPC_H */
 
 #undef TRACE_INCLUDE_PATH

arch/powerpc/mm/mmu_decl.h

@@ -31,10 +31,12 @@
 static inline void _tlbil_all(void)
 {
 	asm volatile ("sync; tlbia; isync" : : : "memory");
+	trace_tlbia(MMU_NO_CONTEXT);
 }
 static inline void _tlbil_pid(unsigned int pid)
 {
 	asm volatile ("sync; tlbia; isync" : : : "memory");
+	trace_tlbia(pid);
 }
 #define _tlbil_pid_noind(pid)	_tlbil_pid(pid)