From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 23 Sep 2013 02:05:03 +0000 (+1000)
Subject: powerpc/powernv: Fix OPAL entry and exit in little endian mode
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=be401b372fae219cf04c0c38890834c813d8dc90;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

powerpc/powernv: Fix OPAL entry and exit in little endian mode

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S
index 8f3844535fbb..2a03e1e63c7a 100644
--- a/arch/powerpc/platforms/powernv/opal-wrappers.S
+++ b/arch/powerpc/platforms/powernv/opal-wrappers.S
@@ -34,7 +34,7 @@
 	mtmsrd	r12,1;			\
 	LOAD_REG_ADDR(r0,.opal_return);	\
 	mtlr	r0;			\
-	li	r0,MSR_DR|MSR_IR;	\
+	li	r0,MSR_DR|MSR_IR|MSR_LE;\
 	andc	r12,r12,r0;		\
 	li	r0,token;		\
 	mtspr	SPRN_HSRR1,r12;		\
@@ -45,6 +45,13 @@
 	hrfid
 
 _STATIC(opal_return)
+	/*
+	 * Fixup endian on OPAL return... we should be able to simplify
+	 * this by instead converting the below trampoline to a set of
+	 * bytes (always BE) since MSR:LE will end up fixed up as a side
+	 * effect of the rfid.
+	 */
+	FIXUP_ENDIAN
 	ld	r2,PACATOC(r13);
 	ld	r4,8(r1);
 	ld	r5,16(r1);