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To: Chris Smart <chris@distroguy.com>, linuxppc-dev@lists.ozlabs.org
From: Michael Ellerman <mpe@ellerman.id.au>
Subject: Re: [v2,1/2] powerpc: Send SIGBUS on unaligned copy and paste
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Date: Wed,  6 Jul 2016 00:10:07 +1000 (AEST)
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On Thu, 2016-16-06 at 23:33:45 UTC, Chris Smart wrote:
> Calling ISA 3.0 instructions copy, copy_first, paste and paste_last
> generates an alignment fault when copying or pasting unaligned
> data (128 byte). We catch this and send SIGBUS to the userspace
> process that caused it.
> 
> We do not emulate these because paste may contain additional metadata
> when pasting to a co-processor and paste_last is the synchronisation
> point for preceding copy/paste sequences.
> 
> Thanks to Michael Neuling <mikey@neuling.org> for his help.
> 
> Signed-off-by: Chris Smart <chris@distroguy.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/ae26b36f8098c793a754549662

cheers