arch: arm64: Enable tracing

Enable the tracing hooks on the ARM64 platform and white-list the
tracing tests.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>

arch/arm/core/aarch64/cpu_idle.S

@@ -15,6 +15,11 @@
 
 GTEXT(arch_cpu_idle)
 SECTION_FUNC(TEXT, arch_cpu_idle)
+#ifdef CONFIG_TRACING
+	stp	xzr, x30, [sp, #-16]!
+	bl	sys_trace_idle
+	ldp	xzr, x30, [sp], #16
+#endif
 	dsb	sy
 	wfi
 	msr	daifclr, #(DAIFSET_IRQ)
@@ -22,6 +27,11 @@ SECTION_FUNC(TEXT, arch_cpu_idle)
 
 GTEXT(arch_cpu_atomic_idle)
 SECTION_FUNC(TEXT, arch_cpu_atomic_idle)
+#ifdef CONFIG_TRACING
+	stp	xzr, x30, [sp, #-16]!
+	bl	sys_trace_idle
+	ldp	xzr, x30, [sp], #16
+#endif
 	msr	daifset, #(DAIFSET_IRQ)
 	isb
 	wfe

arch/arm/core/aarch64/isr_wrapper.S

@@ -58,11 +58,19 @@ SECTION_FUNC(TEXT, _isr_wrapper)
 	add	x2, x2, #1
 	str	x2, [x1, #_kernel_offset_to_nested]
 
+#ifdef CONFIG_TRACING
+	bl	sys_trace_isr_enter
+#endif
+
 	/* Cortex-A has one IRQ line so the main handler will be at offset 0 */
 	ldr	x1, =_sw_isr_table
 	ldp	x0, x3, [x1] /* arg in x0, ISR in x3 */
 	blr	x3
 
+#ifdef CONFIG_TRACING
+	bl	sys_trace_isr_exit
+#endif
+
 	/* --(_kernel->nested) */
 	ldr	x1, =_kernel
 	ldr	x2, [x1, #_kernel_offset_to_nested]

arch/arm/core/aarch64/swap_helper.S

@@ -39,6 +39,11 @@ GDATA(_k_neg_eagain)
  */
 GTEXT(z_arm64_pendsv)
 SECTION_FUNC(TEXT, z_arm64_pendsv)
+#ifdef CONFIG_TRACING
+	stp	xzr, x30, [sp, #-16]!
+	bl	sys_trace_thread_switched_in
+	ldp	xzr, x30, [sp], #16
+#endif
 	/* load _kernel into x1 and current k_thread into x2 */
 	ldr	x1, =_kernel
 	ldr	x2, [x1, #_kernel_offset_to_current]
@@ -112,6 +117,12 @@ SECTION_FUNC(TEXT, z_arm64_pendsv)
 	ldr	x6, [x0]
 	mov	sp, x6
 
+#ifdef CONFIG_TRACING
+	stp	xzr, x30, [sp, #-16]!
+	bl	sys_trace_thread_switched_out
+	ldp	xzr, x30, [sp], #16
+#endif
+
 	/* We restored x30 from the process stack. There are three possible
 	 * cases:
 	 *

boards/arm/qemu_cortex_a53/qemu_cortex_a53.yaml

@@ -17,4 +17,3 @@ testing:
     - net
     - nfc
     - shell
-    - tracing

subsys/debug/openocd.c

@@ -44,7 +44,10 @@ size_t _kernel_openocd_offsets[] = {
 	[OPENOCD_OFFSET_T_USER_OPTIONS] = offsetof(struct _thread_base,
 						   user_options),
 	[OPENOCD_OFFSET_T_PRIO] = offsetof(struct _thread_base, prio),
-#if defined(CONFIG_ARM)
+#if defined(CONFIG_ARM64)
+	[OPENOCD_OFFSET_T_STACK_PTR] = offsetof(struct k_thread,
+						callee_saved.sp),
+#elif defined(CONFIG_ARM)
 	[OPENOCD_OFFSET_T_STACK_PTR] = offsetof(struct k_thread,
 						callee_saved.psp),
 #elif defined(CONFIG_ARC)