From: Michael Ellerman <patch-notifications@ellerman•id.au>
To: Russell Currey <ruscur@russell•cc>, linuxppc-dev@lists•ozlabs.org
Subject: Re: powerpc/64: Fix booting large kernels with STRICT_KERNEL_RWX
Date: Mon, 22 Apr 2019 00:18:58 +1000 (AEST) [thread overview]
Message-ID: <44nBfC6JXcz9sML@ozlabs.org> (raw)
In-Reply-To: <20190327033554.4926-1-ruscur@russell.cc>
On Wed, 2019-03-27 at 03:35:54 UTC, Russell Currey wrote:
> With STRICT_KERNEL_RWX enabled anything marked __init is placed at a 16M
> boundary. This is necessary so that it can be repurposed later with
> different permissions. However, in kernels with text larger than 16M,
> this pushes early_setup past 32M, incapable of being reached by the
> branch instruction.
>
> Fix this by setting the CTR and branching there instead.
>
> Fixes: 1e0fc9d1eb2b ("powerpc/Kconfig: Enable STRICT_KERNEL_RWX for some configs")
> Signed-off-by: Russell Currey <ruscur@russell•cc>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/56c46bba9bbfe229b4472a5be313c44c
cheers
prev parent reply other threads:[~2019-04-21 14:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 3:35 [PATCH] powerpc/64: Fix booting large kernels with STRICT_KERNEL_RWX Russell Currey
2019-04-21 14:18 ` Michael Ellerman [this message]
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