linux-kernel - Re: [PATCH] arm64: Fix SCTLR

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Message-ID: <20141217173915.GF30307@arm.com>
Date:	Wed, 17 Dec 2014 17:39:16 +0000
From:	Will Deacon <will.deacon@....com>
To:	"Suzuki K. Poulose" <suzuki.poulose@....com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: Fix SCTLR_EL1 initialisation

On Wed, Dec 17, 2014 at 03:50:21PM +0000, Suzuki K. Poulose wrote:
> From: "Suzuki K. Poulose" <suzuki.poulose@....com>
> 
> We initialise the SCTLR_EL1 value by read-modify-writeback
> of the desired bits, leaving the other bits (including reserved
> bits(RESx)) untouched. However, sometimes the boot monitor could
> leave garbage values in the RESx bits which could have different
> implications. This patch makes sure that all the bits, including
> the RESx bits, are set to the proper state, except for the
> 'endianness' control bits, EE(25) & E0E(24)- which are set early
> in the el2_setup.
> 
> Updated the state of the Bit[6] in the comment to RES0 in the
> comment.
> 
> Signed-off-by: Suzuki K. Poulose <suzuki.poulose@....com>
> Cc: Will Deacon <will.deacon@....com>
> Cc: Catalin Marinas <catalin.marinas@....com>
> ---

Looks good to me:

  Acked-by: Will Deacon <will.deacon@....com>

Is this 3.19 material, or simply a cleanup/being cautious?

Will
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