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Date:   Mon, 19 May 2014 19:06:58 +0200
From:   Ralf Baechle <ralf@linux-mips.org>
To:     Chen Jie <chenj@lemote.com>
Cc:     Paul Burton <paul.burton@imgtec.com>,
        Huacai Chen <chenhc@lemote.com>,
        Linux MIPS Mailing List <linux-mips@linux-mips.org>,
        =?utf-8?B?546L6ZSQ?= <wangr@lemote.com>
Subject: Re: [PATCH 2/2] MIPS: lib: csum_partial: use wsbh/movn on ls3
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On Mon, May 19, 2014 at 11:15:15PM +0800, Chen Jie wrote:

> 2014-05-19 18:02 GMT+08:00 Paul Burton <paul.burton@imgtec.com>:
> > On Sun, May 18, 2014 at 10:39:20PM +0800, Huacai Chen wrote:
> >> Due to Wang Rui's tests, Loongson-3's EI/DI instructions don't have
> >> correct behaviors, its Status.FR is also different with MIPS64R2. So,
> >> I don't want to select CPU_MIPS64_R2.
> >
> > Out of curiosity, how do ei & di misbehave?
> In our test, it may cause machine stall if use ei&di in kernel,
> especially in smp case.

In that case we could make the use of DI/EI depend on a new errata flag
in war.h or similar.

  Ralf