linux-kernel - Re: [PATCH] arch/arm: enable task isolation functionality

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Message-ID: <d6e46257-dab1-d161-4671-7b1f4b72235d@mellanox.com>
Date:   Mon, 26 Sep 2016 13:31:54 -0400
From:   Chris Metcalf <cmetcalf@...lanox.com>
To:     Francis Giraldeau <francis.giraldeau@...il.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arch/arm: enable task isolation functionality

On 9/22/2016 5:54 PM, Francis Giraldeau wrote:
> This patch is a port of the task isolation functionality to the arm 32-bit
> architecture. The task isolation needs an additional thread flag that
> requires to change the entry assembly code to accept a bitfield larger than
> one byte.  The constants _TIF_SYSCALL_WORK and _TIF_WORK_MASK are now
> defined in the literal pool. The rest of the patch is straightforward and
> reflects what is done on other architectures.
>
> Signed-off-by: Francis Giraldeau<francis.giraldeau@...il.com>
> ---
>   arch/arm/Kconfig                                   |  1 +
>   arch/arm/include/asm/thread_info.h                 |  8 ++++++--
>   arch/arm/kernel/entry-common.S                     | 15 ++++++++++-----
>   arch/arm/kernel/ptrace.c                           | 10 ++++++++++
>   arch/arm/kernel/signal.c                           | 12 +++++++++++-
>   arch/arm/kernel/smp.c                              |  4 ++++
>   arch/arm/mm/fault.c                                |  9 ++++++++-
>   tools/testing/selftests/task_isolation/isolation.c | 14 ++++++++++----
>   8 files changed, 60 insertions(+), 13 deletions(-)

Thanks!  I've merged this into the dataplane tree and will plan to try
to keep it updated (buildable at least) with any further changes.

-- 
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com