Commit 505a314f authored Oct 08, 2018 by Benjamin Herrenschmidt Committed by Michael Ellerman Dec 22, 2018

powerpc: Fix HMIs on big-endian with CONFIG_RELOCATABLE=y



HMIs will crash the kernel due to

	BRANCH_LINK_TO_FAR(hmi_exception_realmode)

Calling into the OPD instead of the actual code.

Fixes: 2337d207 ("powerpc/64: CONFIG_RELOCATABLE support for hmi interrupts")
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Use DOTSYM() rather than #ifdef]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent f1e0addc

arch/powerpc/kernel/exceptions-64s.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -1031,7 +1031,7 @@ TRAMP_REAL_BEGIN(hmi_exception_early)
		EXCEPTION_PROLOG_COMMON_2(PACA_EXGEN)
		EXCEPTION_PROLOG_COMMON_3(0xe60)
		addi r3,r1,STACK_FRAME_OVERHEAD
		BRANCH_LINK_TO_FAR(hmi_exception_realmode) /* Function call ABI */
		BRANCH_LINK_TO_FAR(DOTSYM(hmi_exception_realmode)) /* Function call ABI */
		cmpdi cr0,r3,0

		/* Windup the stack. */

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