tracing: Add __bitmask() macro to trace events to cpumasks and other bitmasks

[firefly-linux-kernel-4.4.55.git] / include / trace / ftrace.h

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 0a1a4f7caf095154c43aa901de0eca61be2b0208..9b7a989dcbccdc594019874d03697abc3c34d153 100644 (file)
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -53,6 +53,9 @@
 #undef __string
 #define __string(item, src) __dynamic_array(char, item, -1)
 
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
+
 #undef TP_STRUCT__entry
 #define TP_STRUCT__entry(args...) args
 
@@ -128,6 +131,9 @@
 #undef __string
 #define __string(item, src) __dynamic_array(char, item, -1)
 
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
+
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
        struct ftrace_data_offsets_##call {                             \
@@ -200,6 +206,15 @@
 #undef __get_str
 #define __get_str(field) (char *)__get_dynamic_array(field)
 
+#undef __get_bitmask
+#define __get_bitmask(field)                                           \
+       ({                                                              \
+               void *__bitmask = __get_dynamic_array(field);           \
+               unsigned int __bitmask_size;                            \
+               __bitmask_size = (__entry->__data_loc_##field >> 16) & 0xffff; \
+               ftrace_print_bitmask_seq(p, __bitmask, __bitmask_size); \
+       })
+
 #undef __print_flags
 #define __print_flags(flag, delim, flag_array...)                      \
        ({                                                              \
@@ -322,6 +337,9 @@ static struct trace_event_functions ftrace_event_type_funcs_##call = {      \
 #undef __string
 #define __string(item, src) __dynamic_array(char, item, -1)
 
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
+
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print)   \
 static int notrace __init                                              \
@@ -372,6 +390,29 @@ ftrace_define_fields_##call(struct ftrace_event_call *event_call)  \
 #define __string(item, src) __dynamic_array(char, item,                        \
                    strlen((src) ? (const char *)(src) : "(null)") + 1)
 
+/*
+ * __bitmask_size_in_bytes_raw is the number of bytes needed to hold
+ * num_possible_cpus().
+ */
+#define __bitmask_size_in_bytes_raw(nr_bits)   \
+       (((nr_bits) + 7) / 8)
+
+#define __bitmask_size_in_longs(nr_bits)                       \
+       ((__bitmask_size_in_bytes_raw(nr_bits) +                \
+         ((BITS_PER_LONG / 8) - 1)) / (BITS_PER_LONG / 8))
+
+/*
+ * __bitmask_size_in_bytes is the number of bytes needed to hold
+ * num_possible_cpus() padded out to the nearest long. This is what
+ * is saved in the buffer, just to be consistent.
+ */
+#define __bitmask_size_in_bytes(nr_bits)                               \
+       (__bitmask_size_in_longs(nr_bits) * (BITS_PER_LONG / 8))
+
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item,  \
+                                        __bitmask_size_in_longs(nr_bits))
+
 #undef DECLARE_EVENT_CLASS
 #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
 static inline notrace int ftrace_get_offsets_##call(                   \
@@ -513,12 +554,22 @@ static inline notrace int ftrace_get_offsets_##call(                      \
        __entry->__data_loc_##item = __data_offsets.item;
 
 #undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)            \
+#define __string(item, src) __dynamic_array(char, item, -1)
 
 #undef __assign_str
 #define __assign_str(dst, src)                                         \
        strcpy(__get_str(dst), (src) ? (const char *)(src) : "(null)");
 
+#undef __bitmask
+#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
+
+#undef __get_bitmask
+#define __get_bitmask(field) (char *)__get_dynamic_array(field)
+
+#undef __assign_bitmask
+#define __assign_bitmask(dst, src, nr_bits)                                    \
+       memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
+
 #undef TP_fast_assign
 #define TP_fast_assign(args...) args
 
@@ -586,6 +637,7 @@ static inline void ftrace_test_probe_##call(void)                   \
 #undef __print_hex
 #undef __get_dynamic_array
 #undef __get_str
+#undef __get_bitmask
 
 #undef TP_printk
 #define TP_printk(fmt, args...) "\"" fmt "\", "  __stringify(args)
@@ -651,6 +703,9 @@ __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
 #undef __get_str
 #define __get_str(field) (char *)__get_dynamic_array(field)
 
+#undef __get_bitmask
+#define __get_bitmask(field) (char *)__get_dynamic_array(field)
+
 #undef __perf_addr
 #define __perf_addr(a) (__addr = (a))