'will.dea...@arm.com';
> 'linux-kernel@vger.kernel.org';
> 'linux-arm-ker...@lists.infradead.org'; Zhang, Lei/張 雷
> Subject: RE: [PATCH] arm64 memory accesses may cause undefined fault on
> Fujitsu-A64FX
>
> At first thanks for your comments.
> I thinks James's comments i
ernel@vger.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
On Tue, Jan 22, 2019 at 02:05:26AM +, Zhang, Lei wrote:
> Hi, Mark
>
> Thanks for your comments, and sorry for late.
>
> > -Original Message-
> > * Under what conditions can the fault occur? e.g. is this in place of
> > some other fault, or completely spurious?
> This fault can
Hello,
On 22/01/2019 02:05, Zhang, Lei wrote:
> Mark Rutland wrote:
>> * How often does this fault occur?
> In my test, this fault occurs once every several times
> in the OS boot sequence, and after the completion of OS boot,
> this fault have never occurred.
> In my opinion, this fault rarely
Hi, Mark
Thanks for your comments, and sorry for late.
> -Original Message-
> * Under what conditions can the fault occur? e.g. is this in place of
> some other fault, or completely spurious?
This fault can occur completely spurious under
a specific hardware condition and instructions
Hi,
On Fri, Jan 18, 2019 at 12:52:38PM +, Zhang, Lei wrote:
> On some variants of the Fujitsu-A64FX cores ver(1.0, 1.1),
> memory accesses may cause undefined fault (Data abort, DFSC=0b11).
So that we can better understand the problem, could you please let us
know the following:
*
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