Re: powerpc/64: Fix booting large kernels with STRICT_KERNEL_RWX
From: Michael Ellerman <hidden>
Date: 2019-04-21 14:48:03
From: Michael Ellerman <hidden>
Date: 2019-04-21 14:48:03
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 <redacted>Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/56c46bba9bbfe229b4472a5be313c44c cheers