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Date:   Tue, 22 Jan 2019 15:23:41 +0000
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Julien Thierry <julien.thierry@arm.com>
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        daniel.thompson@linaro.org, joel@joelfernandes.org,
        marc.zyngier@arm.com, christoffer.dall@arm.com,
        james.morse@arm.com, will.deacon@arm.com, mark.rutland@arm.com
Subject: Re: [PATCH v9 09/26] arm64: Unmask PMR before going idle
Message-ID: <20190122152341.GE187049@arrakis.emea.arm.com>
References: <1548084825-8803-1-git-send-email-julien.thierry@arm.com>
 <1548084825-8803-10-git-send-email-julien.thierry@arm.com>
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On Mon, Jan 21, 2019 at 03:33:28PM +0000, Julien Thierry wrote:
> CPU does not received signals for interrupts with a priority masked by
> ICC_PMR_EL1. This means the CPU might not come back from a WFI
> instruction.
> 
> Make sure ICC_PMR_EL1 does not mask interrupts when doing a WFI.
> 
> Since the logic of cpu_do_idle is becoming a bit more complex than just
> two instructions, lets turn it from ASM to C.
> 
> Signed-off-by: Julien Thierry <julien.thierry@arm.com>
> Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>

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