diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2023-06-14 01:39:22 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2023-06-16 10:15:59 +0200 |
| commit | 7725acaa4f0c04fbefb0e0d342635b967bb7d414 (patch) | |
| tree | 3204b40f312e66d1beb0a4210efbab581817b41d | |
| parent | f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 (diff) | |
init: Provide arch_cpu_finalize_init()
check_bugs() has become a dumping ground for all sorts of activities to
finalize the CPU initialization before running the rest of the init code.
Most are empty, a few do actual bug checks, some do alternative patching
and some cobble a CPU advertisement string together....
Aside of that the current implementation requires duplicated function
declaration and mostly empty header files for them.
Provide a new function arch_cpu_finalize_init(). Provide a generic
declaration if CONFIG_ARCH_HAS_CPU_FINALIZE_INIT is selected and a stub
inline otherwise.
This requires a temporary #ifdef in start_kernel() which will be removed
along with check_bugs() once the architectures are converted over.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230613224544.957805717@linutronix.de
| -rw-r--r-- | arch/Kconfig | 3 | ||||
| -rw-r--r-- | include/linux/cpu.h | 6 | ||||
| -rw-r--r-- | init/main.c | 4 |
3 files changed, 13 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 205fd23e0cad..171e6b5e61b8 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -285,6 +285,9 @@ config ARCH_HAS_DMA_SET_UNCACHED config ARCH_HAS_DMA_CLEAR_UNCACHED bool +config ARCH_HAS_CPU_FINALIZE_INIT + bool + # Select if arch init_task must go in the __init_task_data section config ARCH_TASK_STRUCT_ON_STACK bool diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 8582a7142623..4893c4ac026d 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -184,6 +184,12 @@ void arch_cpu_idle_enter(void); void arch_cpu_idle_exit(void); void __noreturn arch_cpu_idle_dead(void); +#ifdef CONFIG_ARCH_HAS_CPU_FINALIZE_INIT +void arch_cpu_finalize_init(void); +#else +static inline void arch_cpu_finalize_init(void) { } +#endif + int cpu_report_state(int cpu); int cpu_check_up_prepare(int cpu); void cpu_set_state_online(int cpu); diff --git a/init/main.c b/init/main.c index af50044deed5..77d53167f4c7 100644 --- a/init/main.c +++ b/init/main.c @@ -1078,7 +1078,11 @@ asmlinkage __visible void __init __no_sanitize_address __noreturn start_kernel(v taskstats_init_early(); delayacct_init(); + arch_cpu_finalize_init(); + /* Temporary conditional until everything has been converted */ +#ifndef CONFIG_ARCH_HAS_CPU_FINALIZE_INIT check_bugs(); +#endif acpi_subsystem_init(); arch_post_acpi_subsys_init(); |