x86: Support tracing function

Some changes are needed to x86 timer functions to support tracing. Add
these so that the feature works correctly.
Signed-off-by: NSimon Glass <sjg@chromium.org>

arch/x86/include/asm/global_data.h

@@ -40,7 +40,7 @@ struct arch_global_data {
 #include <asm-generic/global_data.h>
 
 #ifndef __ASSEMBLY__
-static inline gd_t *get_fs_gd_ptr(void)
+static inline __attribute__((no_instrument_function)) gd_t *get_fs_gd_ptr(void)
 {
 	gd_t *gd_ptr;
 

arch/x86/include/asm/msr.h

@@ -85,7 +85,8 @@ static inline unsigned long long native_read_tscp(unsigned int *aux)
 #define EAX_EDX_RET(val, low, high)	"=A" (val)
 #endif
 
-static inline unsigned long long native_read_msr(unsigned int msr)
+static inline __attribute__((no_instrument_function))
+	unsigned long long native_read_msr(unsigned int msr)
 {
 	DECLARE_ARGS(val, low, high);
 

arch/x86/include/asm/u-boot-x86.h

@@ -64,7 +64,7 @@ void	board_init_f_r_trampoline(ulong) __attribute__ ((noreturn));
 void	board_init_f_r(void) __attribute__ ((noreturn));
 
 /* Read the time stamp counter */
-static inline uint64_t rdtsc(void)
+static inline __attribute__((no_instrument_function)) uint64_t rdtsc(void)
 {
 	uint32_t high, low;
 	__asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high));

arch/x86/lib/gcc.c

@@ -28,7 +28,9 @@
 #define WRAP_LIBGCC_CALL(type, name) \
 	type __normal_##name(type a, type b) __attribute__((regparm(0))); \
 	type __wrap_##name(type a, type b); \
-	type __wrap_##name(type a, type b) { return __normal_##name(a, b); }
+	type __attribute__((no_instrument_function)) \
+		__wrap_##name(type a, type b) \
+		 { return __normal_##name(a, b); }
 
 WRAP_LIBGCC_CALL(long long, __divdi3)
 WRAP_LIBGCC_CALL(unsigned long long, __udivdi3)

arch/x86/lib/tsc_timer.c

@@ -37,7 +37,7 @@ void timer_set_base(u64 base)
  * restart. This yields a free running counter guaranteed to take almost 6
  * years to wrap around even at 100GHz clock rate.
  */
-u64 get_ticks(void)
+u64 __attribute__((no_instrument_function)) get_ticks(void)
 {
 	u64 now_tick = rdtsc();
 
@@ -50,7 +50,7 @@ u64 get_ticks(void)
 #define PLATFORM_INFO_MSR 0xce
 
 /* Get the speed of the TSC timer in MHz */
-unsigned long get_tbclk_mhz(void)
+unsigned __attribute__((no_instrument_function)) long get_tbclk_mhz(void)
 {
 	u32 ratio;
 	u64 platform_info = native_read_msr(PLATFORM_INFO_MSR);
@@ -75,7 +75,7 @@ ulong get_timer(ulong base)
 	return get_ms_timer() - base;
 }
 
-ulong timer_get_us(void)
+ulong __attribute__((no_instrument_function)) timer_get_us(void)
 {
 	return get_ticks() / get_tbclk_mhz();
 }