Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
[MIPS] Make SMTC_IDLE_HOOK_DEBUG a proper option in Kconfig.debug.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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-13
+9
arch/mips/Kconfig.debug
+9
arch/mips/Kconfig.debug
···
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This option will slow down process creation somewhat.
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config CONFIG_SMTC_IDLE_HOOK_DEBUG
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bool "Enable additional debug checks before going into CPU idle loop"
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depends on DEBUG_KERNEL && MIPS_MT_SMTC
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help
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This option enables Enable additional debug checks before going into
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CPU idle loop. For details on these checks, see
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arch/mips/kernel/smtc.c. This debugging option result in significant
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overhead so should be disabled in production kernels.
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+
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config KGDB
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bool "Remote GDB kernel debugging"
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depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB
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arch/mips/kernel/process.c
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-2
arch/mips/kernel/process.c
···
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/* endless idle loop with no priority at all */
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while (1) {
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while (!need_resched()) {
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-
#ifdef CONFIG_MIPS_MT_SMTC
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+
#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
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extern void smtc_idle_loop_hook(void);
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smtc_idle_loop_hook();
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-
#endif /* CONFIG_MIPS_MT_SMTC */
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#endif
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if (cpu_wait)
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(*cpu_wait)();
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}
+8
-11
arch/mips/kernel/smtc.c
+8
-11
arch/mips/kernel/smtc.c
···
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__setup("nostlb", stlb_disable);
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__setup("asidmask=", asidmask_set);
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/* Enable additional debug checks before going into CPU idle loop */
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#define SMTC_IDLE_HOOK_DEBUG
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-
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-
#ifdef SMTC_IDLE_HOOK_DEBUG
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#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
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static int hang_trig = 0;
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···
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static atomic_t idle_hook_initialized = {0};
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static int clock_hang_reported[NR_CPUS];
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-
#endif /* SMTC_IDLE_HOOK_DEBUG */
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#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
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/* Initialize shared TLB - the should probably migrate to smtc_setup_cpus() */
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···
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printk("ASID mask value override to 0x%x\n", asidmask);
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/* Temporary */
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-
#ifdef SMTC_IDLE_HOOK_DEBUG
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+
#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
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if (hang_trig)
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printk("Logic Analyser Trigger on suspected TC hang\n");
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-
#endif /* SMTC_IDLE_HOOK_DEBUG */
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#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
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/* Put MVPE's into 'configuration state' */
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write_c0_mvpcontrol( read_c0_mvpcontrol() | MVPCONTROL_VPC );
···
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case SMTC_CLOCK_TICK:
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/* Invoke Clock "Interrupt" */
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ipi_timer_latch[dest_copy] = 0;
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-
#ifdef SMTC_IDLE_HOOK_DEBUG
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+
#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
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clock_hang_reported[dest_copy] = 0;
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-
#endif /* SMTC_IDLE_HOOK_DEBUG */
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+
#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
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local_timer_interrupt(0, NULL);
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break;
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case LINUX_SMP_IPI:
···
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1021
void smtc_idle_loop_hook(void)
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{
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#ifdef SMTC_IDLE_HOOK_DEBUG
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#ifdef CONFIG_SMTC_IDLE_HOOK_DEBUG
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int im;
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int flags;
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int mtflags;
···
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local_irq_restore(flags);
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if (pdb_msg != &id_ho_db_msg[0])
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printk("CPU%d: %s", smp_processor_id(), id_ho_db_msg);
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-
#endif /* SMTC_IDLE_HOOK_DEBUG */
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#endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
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/*
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* Replay any accumulated deferred IPIs. If "Instant Replay"