[MIPS] Make SMTC_IDLE_HOOK_DEBUG a proper option in Kconfig.debug. (c68644d3) · Commits · e / devices / android_kernel_fairphone_FP3

arch/mips/Kconfig.debug

+9 −0

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

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

arch/mips/kernel/process.c

+2 −2

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

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

arch/mips/kernel/smtc.c

+8 −11

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

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

		#ifdef SMTC_IDLE_HOOK_DEBUG
		#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG

		static int hang_trig = 0;

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

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

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

		void smtc_idle_loop_hook(void)
		{
		#ifdef SMTC_IDLE_HOOK_DEBUG
		#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
		int im;
		int flags;
		int mtflags;
		@@ -1113,7 +1110,7 @@ void smtc_idle_loop_hook(void)
		local_irq_restore(flags);
		if (pdb_msg != &id_ho_db_msg[0])
		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"