[PATCH v3 07/25] arm64: enable the Permission Overlay Extension for EL0

[Catalin Marinas]

On Fri, Nov 24, 2023 at 04:34:52PM +0000, Joey Gouly wrote:
> +#ifdef CONFIG_ARM64_POE
> +static void cpu_enable_poe(const struct arm64_cpu_capabilities *__unused)
> +{
> +	sysreg_clear_set(REG_TCR2_EL1, 0, TCR2_EL1x_E0POE);
> +	sysreg_clear_set(CPACR_EL1, 0, CPACR_ELx_E0POE);
> +}
> +#endif

Don't we need the TCR2_EL1x.POE bit (for EL1) enabled as well? I'm
thinking of the LDXR/STXR instructions accessing user memory (the futex
code).

-- 
Catalin