[PATCH 2/6] arm64: Allow mismatched 32-bit EL0 support

[Catalin Marinas]

On Tue, Oct 27, 2020 at 09:51:14PM +0000, Will Deacon wrote:
> +bool system_has_mismatched_32bit_el0(void)
> +{
> +	u64 reg;
> +	unsigned int fld;
> +
> +	if (!__allow_mismatched_32bit_el0)
> +		return false;
> +
> +	reg = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1);
> +	fld = cpuid_feature_extract_unsigned_field(reg, ID_AA64PFR0_EL0_SHIFT);
> +	return fld == ID_AA64PFR0_EL0_64BIT_ONLY;
> +}

Same here, this reports true even if no 32-bit is available (I have yet
to go through the other patches to see how this function is used).

-- 
Catalin