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References: <20201113093720.21106-1-will@kernel.org> <20201113093720.21106-3-will@kernel.org>
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From:   Valentin Schneider <valentin.schneider@arm.com>
To:     Will Deacon <will@kernel.org>
Cc:     linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org,
        linux-kernel@vger.kernel.org,
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        Ingo Molnar <mingo@redhat.com>,
        Juri Lelli <juri.lelli@redhat.com>,
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Subject: Re: [PATCH v3 02/14] arm64: Allow mismatched 32-bit EL0 support
In-reply-to: <20201113093720.21106-3-will@kernel.org>
Date:   Thu, 19 Nov 2020 11:27:41 +0000
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On 13/11/20 09:37, Will Deacon wrote:
> +const struct cpumask *system_32bit_el0_cpumask(void)
> +{
> +	if (!system_supports_32bit_el0())
> +		return cpu_none_mask;
> +
> +	if (static_branch_unlikely(&arm64_mismatched_32bit_el0))
> +		return cpu_32bit_el0_mask;
> +
> +	return cpu_present_mask;
> +}

Nit: this is used in patch 13 to implement arch_cpu_allowed_mask(). Since
that latter defaults to cpu_possible_mask, this probably should too.