From: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Herbert Xu <herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
Cc: Corentin LABBE
<clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
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linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
Subject: Re: [PATCH v5 4/4] crypto: Add Allwinner Security System crypto accelerator
Date: Fri, 31 Oct 2014 09:13:23 +0100 [thread overview]
Message-ID: <20141031081323.GS21251@lukather> (raw)
In-Reply-To: <20141031072030.GA7563-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
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On Fri, Oct 31, 2014 at 03:20:30PM +0800, Herbert Xu wrote:
> On Thu, Oct 30, 2014 at 06:19:33PM +0100, Maxime Ripard wrote:
> >
> > > With AF_ALG and cryptodev, the SG is in highmem. Verified with some
> > > PageHighMem().
> >
> > Then fix AF_ALG and cryptodev, because all of the other drivers might
> > be affected.
>
> No it's the driver that needs to be fixed. Of course if there
> are enough drivers it may be worthwhile adding either copying or
> a software fallback for highmem requests.
I don't understand here. Why would other drivers *not* being affected?
If the scatter list passed by AF_ALG can be in highmem, I guess it's
the case for every driver out there. Almost every kernel code I've
seen so far makes the assumption that the memory it has is mapped and
accessible.
Somehow, it's the driver's fault now, and not the part of kernel that
actually does the allocation?
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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next prev parent reply other threads:[~2014-10-31 8:13 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-19 14:16 [PATCH v5] crypto: Add Allwinner Security System crypto accelerator LABBE Corentin
[not found] ` <1413728182-13569-1-git-send-email-clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-10-19 14:16 ` [PATCH v5 1/4] ARM: sun7i: dt: Add Security System to A20 SoC DTS LABBE Corentin
2014-10-19 14:16 ` [PATCH v5 2/4] ARM: sunxi: dt: Add DT bindings documentation for SUNXI Security System LABBE Corentin
[not found] ` <1413728182-13569-3-git-send-email-clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-10-20 12:02 ` Koen Kooi
2014-10-19 14:16 ` [PATCH v5 3/4] MAINTAINERS: Add myself as maintainer of Allwinner " LABBE Corentin
2014-10-19 14:16 ` [PATCH v5 4/4] crypto: Add Allwinner Security System crypto accelerator LABBE Corentin
2014-10-20 23:28 ` Vladimir Zapolskiy
2014-10-20 23:52 ` Joe Perches
[not found] ` <1413849173.5407.6.camel-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org>
2014-10-21 16:39 ` Corentin LABBE
[not found] ` <54459AA5.2030705-ChpfBGZJDbMAvxtiuMwx3w@public.gmane.org>
2014-10-21 16:25 ` Corentin LABBE
[not found] ` <54468902.1040802-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-10-21 17:27 ` Vladimir Zapolskiy
[not found] ` <1413728182-13569-5-git-send-email-clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-10-21 19:11 ` Maxime Ripard
2014-10-24 18:52 ` Corentin LABBE
[not found] ` <544A9FEA.6020304-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-10-30 17:19 ` Maxime Ripard
2014-10-31 7:20 ` Herbert Xu
[not found] ` <20141031072030.GA7563-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2014-10-31 8:13 ` Maxime Ripard [this message]
2014-10-31 8:18 ` Herbert Xu
[not found] ` <20141031081803.GA8012-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2014-10-31 9:57 ` Maxime Ripard
2014-10-31 10:05 ` Herbert Xu
[not found] ` <20141031100522.GA8655-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2014-11-03 9:34 ` Maxime Ripard
2014-11-03 10:35 ` Herbert Xu
[not found] ` <20141103103528.GA30154-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2014-11-06 14:26 ` Maxime Ripard
2014-11-06 14:32 ` Herbert Xu
[not found] ` <20141106143217.GA3636-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
2014-11-16 17:13 ` Maxime Ripard
2014-10-22 9:00 ` Arnd Bergmann
2014-10-22 9:00 ` Arnd Bergmann
2014-10-22 9:00 ` Arnd Bergmann
2014-10-24 18:50 ` Corentin LABBE
2014-10-22 9:00 ` Arnd Bergmann
2014-10-22 9:00 ` Arnd Bergmann
2014-11-06 14:13 ` Herbert Xu
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