[MIPS] Make SMTC_IDLE_HOOK_DEBUG a proper option in Kconfig.debug. (c68644d3) · Commits · e / devices / android_kernel_teracube_mt6765

arch/mips/Kconfig.debug

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -37,6 +37,15 @@ config DEBUG_STACK_USAGE

	This option will slow down process creation somewhat.		This option will slow down process creation somewhat.

			config CONFIG_SMTC_IDLE_HOOK_DEBUG
			bool "Enable additional debug checks before going into CPU idle loop"
			depends on DEBUG_KERNEL && MIPS_MT_SMTC
			help
			This option enables Enable additional debug checks before going into
			CPU idle loop. For details on these checks, see
			arch/mips/kernel/smtc.c. This debugging option result in significant
			overhead so should be disabled in production kernels.

	config KGDB		config KGDB
	bool "Remote GDB kernel debugging"		bool "Remote GDB kernel debugging"
	depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB		depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB

arch/mips/kernel/process.c

+2 −2

Original line number	Original line	Diff line number	Diff line
	@@ -51,11 +51,11 @@ ATTRIB_NORET void cpu_idle(void)
	/* endless idle loop with no priority at all */		/* endless idle loop with no priority at all */
	while (1) {		while (1) {
	while (!need_resched()) {		while (!need_resched()) {
	#ifdef CONFIG_MIPS_MT_SMTC		#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
	extern void smtc_idle_loop_hook(void);		extern void smtc_idle_loop_hook(void);

	smtc_idle_loop_hook();		smtc_idle_loop_hook();
	#endif /* CONFIG_MIPS_MT_SMTC */		#endif
	if (cpu_wait)		if (cpu_wait)
	(*cpu_wait)();		(*cpu_wait)();
	}		}

arch/mips/kernel/smtc.c

+8 −11

Original line number	Original line	Diff line number	Diff line
	@@ -141,10 +141,7 @@ __setup("ipibufs=", ipibufs);
	__setup("nostlb", stlb_disable);		__setup("nostlb", stlb_disable);
	__setup("asidmask=", asidmask_set);		__setup("asidmask=", asidmask_set);

	/* Enable additional debug checks before going into CPU idle loop */		#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
	#define SMTC_IDLE_HOOK_DEBUG

	#ifdef SMTC_IDLE_HOOK_DEBUG

	static int hang_trig = 0;		static int hang_trig = 0;

	@@ -176,7 +173,7 @@ int tcnoprog[NR_CPUS];
	static atomic_t idle_hook_initialized = {0};		static atomic_t idle_hook_initialized = {0};
	static int clock_hang_reported[NR_CPUS];		static int clock_hang_reported[NR_CPUS];

	#endif /* SMTC_IDLE_HOOK_DEBUG */		#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */

	/* Initialize shared TLB - the should probably migrate to smtc_setup_cpus() */		/* Initialize shared TLB - the should probably migrate to smtc_setup_cpus() */

	@@ -394,10 +391,10 @@ void mipsmt_prepare_cpus(void)
	printk("ASID mask value override to 0x%x\n", asidmask);		printk("ASID mask value override to 0x%x\n", asidmask);

	/* Temporary */		/* Temporary */
	#ifdef SMTC_IDLE_HOOK_DEBUG		#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
	if (hang_trig)		if (hang_trig)
	printk("Logic Analyser Trigger on suspected TC hang\n");		printk("Logic Analyser Trigger on suspected TC hang\n");
	#endif /* SMTC_IDLE_HOOK_DEBUG */		#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */

	/* Put MVPE's into 'configuration state' */		/* Put MVPE's into 'configuration state' */
	write_c0_mvpcontrol( read_c0_mvpcontrol() \| MVPCONTROL_VPC );		write_c0_mvpcontrol( read_c0_mvpcontrol() \| MVPCONTROL_VPC );
	@@ -817,9 +814,9 @@ void ipi_decode(struct smtc_ipi *pipi)
	case SMTC_CLOCK_TICK:		case SMTC_CLOCK_TICK:
	/* Invoke Clock "Interrupt" */		/* Invoke Clock "Interrupt" */
	ipi_timer_latch[dest_copy] = 0;		ipi_timer_latch[dest_copy] = 0;
	#ifdef SMTC_IDLE_HOOK_DEBUG		#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
	clock_hang_reported[dest_copy] = 0;		clock_hang_reported[dest_copy] = 0;
	#endif /* SMTC_IDLE_HOOK_DEBUG */		#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
	local_timer_interrupt(0, NULL);		local_timer_interrupt(0, NULL);
	break;		break;
	case LINUX_SMP_IPI:		case LINUX_SMP_IPI:
	@@ -1020,7 +1017,7 @@ EXPORT_SYMBOL(smtc_ipi_replay);

	void smtc_idle_loop_hook(void)		void smtc_idle_loop_hook(void)
	{		{
	#ifdef SMTC_IDLE_HOOK_DEBUG		#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
	int im;		int im;
	int flags;		int flags;
	int mtflags;		int mtflags;
	@@ -1113,7 +1110,7 @@ void smtc_idle_loop_hook(void)
	local_irq_restore(flags);		local_irq_restore(flags);
	if (pdb_msg != &id_ho_db_msg[0])		if (pdb_msg != &id_ho_db_msg[0])
	printk("CPU%d: %s", smp_processor_id(), id_ho_db_msg);		printk("CPU%d: %s", smp_processor_id(), id_ho_db_msg);
	#endif /* SMTC_IDLE_HOOK_DEBUG */		#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */

	/*		/*
	* Replay any accumulated deferred IPIs. If "Instant Replay"		* Replay any accumulated deferred IPIs. If "Instant Replay"