HMIs will crash the kernel due to
BRANCH_LINK_TO_FAR(hmi_exception_realmode)
Calling into the OPD instead of the actual code.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
This hack fixes it for me, but it's not great. Nick, any better idea ?
diff --git a/arch/powerpc/kernel/exceptions-64s.S
b/arch/powerpc/kernel/exceptions-64s.S
index ea04dfb..752709cc8 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1119,7 +1119,11 @@ TRAMP_REAL_BEGIN(hmi_exception_early)
EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN)
EXCEPTION_PROLOG_COMMON_3(0xe60)
addi r3,r1,STACK_FRAME_OVERHEAD
+#ifdef PPC64_ELF_ABI_v1
+ BRANCH_LINK_TO_FAR(.hmi_exception_realmode) /* Function call ABI */
+#else
BRANCH_LINK_TO_FAR(hmi_exception_realmode) /* Function call ABI */
+#endif
cmpdi cr0,r3,0
/* Windup the stack. */
