From: Scott Wood <scottwood@freescale.com>
Date: Sat, 18 Jul 2015 19:24:58 +0000 (-0500)
Subject: powerpc/fsl: Force coherent memory on e500mc derivatives
X-Git-Tag: omap-for-v4.3/fixes-rc1~100^2~6^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c60232029aee84f69da0e74aa6f6d249edbbc80b;p=pandora-kernel.git

powerpc/fsl: Force coherent memory on e500mc derivatives

In CoreNet systems it is not allowed to mix M and non-M mappings to the
same memory, and coherent DMA accesses are considered to be M mappings
for this purpose.  Ignoring this has been observed to cause hard
lockups in non-SMP kernels on e6500.

Furthermore, e6500 implements the LRAT (logical to real address table)
which allows KVM guests to control the WIMGE bits.  This means that
KVM cannot force the M bit on the way it usually does, so the guest had
better set it itself.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---

Reading git-diff-tree failed