* Use armv8 instructions to optimize ARM32 crypto
@ 2015-01-05 10:12 hong-rong hsu
2015-01-08 13:29 ` hong-rong hsu
0 siblings, 1 reply; 3+ messages in thread
From: hong-rong hsu @ 2015-01-05 10:12 UTC (permalink / raw)
To: linux-arm-kernel
Hi,
We are engineers from Mediatek. We have a patch to optimize ARM32 kernel
crypto performance by armv8 instructions. Do you have interest in it?
It may be helpful for some projects which running 32-bit kernel at
armv8. Do you suggest that we maintain it at the main-stream :-)? (ex.
add aes-armv8.S in arch/arm/crypto/ folder)
Thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Use armv8 instructions to optimize ARM32 crypto
2015-01-05 10:12 Use armv8 instructions to optimize ARM32 crypto hong-rong hsu
@ 2015-01-08 13:29 ` hong-rong hsu
2015-01-08 14:34 ` Arnd Bergmann
0 siblings, 1 reply; 3+ messages in thread
From: hong-rong hsu @ 2015-01-08 13:29 UTC (permalink / raw)
To: linux-arm-kernel
Excuse me, add more reviewers.
On Mon, 2015-01-05 at 18:12 +0800, hong-rong hsu wrote:
> Hi,
>
> We are engineers from Mediatek. We have a patch to optimize ARM32 kernel
> crypto performance by armv8 instructions. Do you have interest in it?
>
> It may be helpful for some projects which running 32-bit kernel at
> armv8. Do you suggest that we maintain it at the main-stream :-)? (ex.
> add aes-armv8.S in arch/arm/crypto/ folder)
>
> Thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Use armv8 instructions to optimize ARM32 crypto
2015-01-08 13:29 ` hong-rong hsu
@ 2015-01-08 14:34 ` Arnd Bergmann
0 siblings, 0 replies; 3+ messages in thread
From: Arnd Bergmann @ 2015-01-08 14:34 UTC (permalink / raw)
To: linux-arm-kernel
On Thursday 08 January 2015 21:29:54 hong-rong hsu wrote:
> Excuse me, add more reviewers.
>
> On Mon, 2015-01-05 at 18:12 +0800, hong-rong hsu wrote:
> > Hi,
> >
> > We are engineers from Mediatek. We have a patch to optimize ARM32 kernel
> > crypto performance by armv8 instructions. Do you have interest in it?
> >
> > It may be helpful for some projects which running 32-bit kernel at
> > armv8. Do you suggest that we maintain it at the main-stream :-)? (ex.
> > add aes-armv8.S in arch/arm/crypto/ folder)
It sounds like this is just an additional driver, so that should not
be a problem.
A slight concern that I have is that we don't really support ARMv8
in 32-bit mode. There are a few differences between v7 and v8, and
building the kernel with -march=armv8 will currently result in build
warnings for deprecated assembler instructions, IIRC.
Arnd
^ permalink raw reply [flat|nested] 3+ messages in thread
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