[PATCH v4 06/29] arm64: context switch POR_EL0 register

[Kevin Brodsky]

On 03/05/2024 15:01, Joey Gouly wrote:
> @@ -371,6 +382,9 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
>  		if (system_supports_tpidr2())
>  			p->thread.tpidr2_el0 = read_sysreg_s(SYS_TPIDR2_EL0);
>  
> +		if (system_supports_poe())
> +			p->thread.por_el0 = read_sysreg_s(SYS_POR_EL0);

This is most likely needed for kernel threads as well, because they may
be affected by POR_EL0 too (see my reply on patch 17).

Kevin

> +
>  		if (stack_start) {
>  			if (is_compat_thread(task_thread_info(p)))
>  				childregs->compat_sp = stack_start;