linux-kernel - RE: [PATCH v3 0/1] arm64: Add workaround for Fujitsu A64FX erratum 010001

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Message-ID: <8898674D84E3B24BA3A2D289B872026A6A3090AC@G01JPEXMBKW03>
Date:   Fri, 1 Feb 2019 05:53:50 +0000
From:   "Zhang, Lei" <zhang.lei@...fujitsu.com>
To:     'James Morse' <james.morse@....com>
CC:     'Mark Rutland' <mark.rutland@....com>,
        'Catalin Marinas' <catalin.marinas@....com>,
        "'will.deacon@....com'" <will.deacon@....com>,
        "'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
        "'linux-arm-kernel@...ts.infradead.org'" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v3 0/1] arm64: Add workaround for Fujitsu A64FX erratum
 010001

Hi James,

> -----Original Message-----
> From: linux-arm-kernel
> [mailto:linux-arm-kernel-bounces@...ts.infradead.org] On Behalf Of
> James Morse
> Sent: Thursday, January 31, 2019 12:00 AM
> To: Zhang, Lei/張 雷
> Cc: 'Mark Rutland'; 'Catalin Marinas'; 'will.deacon@....com';
> 'linux-kernel@...r.kernel.org';
> 'linux-arm-kernel@...ts.infradead.org'
> Subject: Re: [PATCH v3 0/1] arm64: Add workaround for Fujitsu A64FX
> erratum 010001
> 
> 
> e03e61c3173c ("arm64: kaslr: Set TCR_EL1.NFD1 when
> CONFIG_RANDOMIZE_BASE=y") ?
> 
> So you'd never see it if you disabled CONFIG_RANDOMIZE_BASE?
For security, it is necessary to set CONFIG_RANDOMIZE_BASE=y.

Thanks,
Zhang Lei