microblaze: Disable stack protection from bootloader
Microblaze without MMU can use stack protection in bootloader
and kernel should clear this setting ASAP.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
index 817b7ee..b7fb043 100644
--- a/arch/microblaze/kernel/head.S
+++ b/arch/microblaze/kernel/head.S
@@ -64,6 +64,10 @@
#endif
mts rmsr, r0
+/* Disable stack protection from bootloader */
+ mts rslr, r0
+ addi r8, r0, 0xFFFFFFF
+ mts rshr, r8
/*
* According to Xilinx, msrclr instruction behaves like 'mfs rX,rpc'
* if the msrclr instruction is not enabled. We use this to detect