diff options
| -rw-r--r-- | arch/mips/Kconfig.debug | 9 | ||||
| -rw-r--r-- | arch/mips/kernel/process.c | 4 | ||||
| -rw-r--r-- | arch/mips/kernel/smtc.c | 19 |
3 files changed, 19 insertions, 13 deletions
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug index d5e60a0c1de..72d5c198e79 100644 --- a/arch/mips/Kconfig.debug +++ b/arch/mips/Kconfig.debug @@ -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 diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index a669089e467..6bdfb5a9fa1 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -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)(); } diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c index 9251ea82493..f253eda27fa 100644 --- a/arch/mips/kernel/smtc.c +++ b/arch/mips/kernel/smtc.c @@ -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" |