Re: [patch 1/2 v2] x86/cpu: Init AP exception handling from cpu_init_secondary()

From: Peter Zijlstra
Date: Wed May 12 2021 - 04:52:07 EST


On Mon, May 10, 2021 at 11:29:25PM +0200, Thomas Gleixner wrote:
> +#ifdef CONFIG_SMP
> +void cpu_init_secondary(void)
> +{
/*
* Relies on the BP having set-up the IDT tables, which
* are loaded on this CPU in the below
* cpu_init_exception_handling().
*/
> + cpu_init_exception_handling();
> + cpu_init();
> +}
> +#endif

Or something along those lines? It took me a little to figure out why
start_secondary() didn't have idt_setup_traps(), hopefully something
like this will avoid a little future confusion.