[PATCH v1 05/20] arm64: context switch POR_EL0 register

[Mark Brown]

On Wed, Sep 27, 2023 at 03:01:08PM +0100, Joey Gouly wrote:

> +/* Initial value for Permission Overlay Extension for EL0 */
> +#define POR_EL0_INIT	UL(0x7)

Might be useful to explain why this is the default (and possibly also
define in terms of the constants for POR values)?

> +static void permission_overlay_switch(struct task_struct *next)
> +{
> +	if (alternative_has_cap_unlikely(ARM64_HAS_S1POE)) {

Why the _unlikely here?
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