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Date:   Fri, 21 May 2021 11:55:37 +0100
From:   Catalin Marinas <catalin.marinas@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, Marc Zyngier <maz@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Qais Yousef <qais.yousef@arm.com>,
        Suren Baghdasaryan <surenb@google.com>,
        Quentin Perret <qperret@google.com>, Tejun Heo <tj@kernel.org>,
        Li Zefan <lizefan@huawei.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Ingo Molnar <mingo@redhat.com>,
        Juri Lelli <juri.lelli@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>, kernel-team@android.com
Subject: Re: [PATCH v6 04/21] arm64: Kill 32-bit applications scheduled on
 64-bit-only CPUs
Message-ID: <20210521105536.GF6675@arm.com>
References: <20210518094725.7701-1-will@kernel.org>
 <20210518094725.7701-5-will@kernel.org>
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On Tue, May 18, 2021 at 10:47:08AM +0100, Will Deacon wrote:
> Scheduling a 32-bit application on a 64-bit-only CPU is a bad idea.
> 
> Ensure that 32-bit applications always take the slow-path when returning
> to userspace on a system with mismatched support at EL0, so that we can
> avoid trying to run on a 64-bit-only CPU and force a SIGKILL instead.
> 
> Signed-off-by: Will Deacon <will@kernel.org>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>