Fwd: Is VFP or Neon supported in kernel-side code? <EOM>
dave.martin at linaro.org
Thu Apr 14 16:02:21 UTC 2011
---------- Forwarded message ----------
From: Dave Martin <dave.martin at linaro.org>
Date: Thu, Apr 14, 2011 at 5:01 PM
Subject: Re: Is VFP or Neon supported in kernel-side code? <EOM>
To: Tixy <tixy at yxit.co.uk>
> Is VFP or Neon supported in kernel-side code?
There is some possible future work to see if we can enable this, to
allow acceleration of some number-crunching algorithms in the kernel,
but it's not implemented yet.
For now, I think it's reasonable simply to reject attempts to insert
kprobes on VFP/NEON instructions (as we must for cp15). I think that
these instructions are never used at the entry/exit points of
compiler-generated functions -- in any case, we build the kernel with
-msoft-float, so actually the compiler should never implicitly
generate these instructions at all.
On Thu, Apr 14, 2011 at 2:21 PM, Tixy <tixy at yxit.co.uk> wrote:
> linaro-kernel mailing list
> linaro-kernel at lists.linaro.org
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