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From: Michael Ellerman <mpe@ellerman.id.au>
To: Jordan Niethe <jniethe5@gmail.com>, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 3/3] powerpc/sstep: Always test lmw and stmw
In-Reply-To: <20210225032108.1458352-3-jniethe5@gmail.com>
References: <20210225032108.1458352-1-jniethe5@gmail.com>
 <20210225032108.1458352-3-jniethe5@gmail.com>
Date: Fri, 02 Apr 2021 00:39:26 +1100
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Cc: Jordan Niethe <jniethe5@gmail.com>
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 <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>

Hi Jordan,

Jordan Niethe <jniethe5@gmail.com> writes:
> Load Multiple Word (lmw) and Store Multiple Word (stmw) will raise an
> Alignment Exception:
>   - Little Endian mode: always
>   - Big Endian mode: address not word aligned
>
> These conditions do not depend on cache inhibited memory. Test the
> alignment handler emulation of these instructions regardless of if there
> is cache inhibited memory available or not.
>
> Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
> ---
>  .../powerpc/alignment/alignment_handler.c     | 96 ++++++++++++++++++-
>  1 file changed, 94 insertions(+), 2 deletions(-)

Because of dd3a44c06f7b ("selftests/powerpc: Only test lwm/stmw on big endian")
this will need a respin sorry.

You'll need to add macros to generate lmw/stmw using .long, to avoid the
bug fixed in that commit.

cheers