[PATCH 06/14] powerpc/rtas: Load rtas entry MSR explicitly

[Nicholas Piggin <npiggin@gmail.com>]

Rather than adjust the current MSR value to find the rtas entry
MSR on 64-bit, load the explicit value we want as 32-bit does.

This prevents some facilities (e.g., VEC and VSX) from being left
enabled which doesn't seem to cause a problem but it's more
consistent to always use the same MSR and minimise facilities
enabled.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/kernel/rtas_entry.S | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/powerpc/kernel/rtas_entry.S b/arch/powerpc/kernel/rtas_entry.S
index 7b93687b9a10..08eb731f08b8 100644
--- a/arch/powerpc/kernel/rtas_entry.S
+++ b/arch/powerpc/kernel/rtas_entry.S
@@ -99,14 +99,7 @@ _GLOBAL(enter_rtas)
 	clrldi	r4,r4,2			/* convert to realmode address */
 	mtlr	r4
 
-	li	r0,0
-	ori	r0,r0,MSR_EE|MSR_SE|MSR_BE|MSR_RI
-	andc	r0,r6,r0
-
-	li	r9,1
-	rldicr	r9,r9,MSR_SF_LG,(63-MSR_SF_LG)
-	ori	r9,r9,MSR_IR|MSR_DR|MSR_FE0|MSR_FE1|MSR_FP|MSR_RI|MSR_LE
-	andc	r6,r0,r9
+	LOAD_REG_IMMEDIATE(r6, MSR_ME)
 
 __enter_rtas:
 	LOAD_REG_ADDR(r4, rtas)
-- 
2.23.0