ARM: PSCI: save and restore clobbered registers in v7_flush_dcache_all
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/arch/arm/cpu/armv7/psci.S b/arch/arm/cpu/armv7/psci.S
index cdd001f..ab40837 100644
--- a/arch/arm/cpu/armv7/psci.S
+++ b/arch/arm/cpu/armv7/psci.S
@@ -110,6 +110,7 @@
/* Imported from Linux kernel */
LENTRY(v7_flush_dcache_all)
+ stmfd sp!, {r4-r5, r7, r9-r11, lr}
dmb @ ensure ordering with previous memory accesses
mrc p15, 1, r0, c0, c0, 1 @ read clidr
ands r3, r0, #0x7000000 @ extract loc from clidr
@@ -153,6 +154,7 @@
mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr
dsb st
isb
+ ldmfd sp!, {r4-r5, r7, r9-r11, lr}
bx lr
ENDPROC(v7_flush_dcache_all)