linux-kernel - RE: [PATCH] arm64 memory accesses may cause undefined fault on Fujitsu-A64FX

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Message-ID: <8898674D84E3B24BA3A2D289B872026A6A2A3BED@G01JPEXMBKW03>
Date:   Wed, 23 Jan 2019 12:51:08 +0000
From:   "Zhang, Lei" <zhang.lei@...fujitsu.com>
To:     'Mark Rutland' <mark.rutland@....com>,
        "'james.morse@....com'" <james.morse@....com>
CC:     "'catalin.marinas@....com'" <catalin.marinas@....com>,
        "'will.deacon@....com'" <will.deacon@....com>,
        "'linux-arm-kernel@...ts.infradead.org'" 
        <linux-arm-kernel@...ts.infradead.org>,
        "'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
        "Zhang, Lei" <zhang.lei@...fujitsu.com>
Subject: RE: [PATCH] arm64 memory accesses may cause undefined fault on
 Fujitsu-A64FX

Hi, Mark, James
> -----Original Message-----
> From: Mark Rutland [mailto:mark.rutland@....com]
> Sent: Wednesday, January 23, 2019 12:24 AM
> To: Zhang, Lei/張 雷
> Cc: 'catalin.marinas@....com'; 'will.deacon@....com';
> 'linux-arm-kernel@...ts.infradead.org';
> 'linux-kernel@...r.kernel.org'
> Subject: Re: [PATCH] arm64 memory accesses may cause undefined fault on
> Fujitsu-A64FX
> 
 
> As above, I'm very concerned that this could be taken from kernel
> context. There are a number of cases where we cannot handle such faults:
At first thanks for your comments. 
I thinks James's comments is quite similar with above comment.
I am reviewing this point now.
I will respond to your questions after I check this.

Thanks
Lei Zhang