powerpc/8xx: Move tail of alignment exception out of line (d52668f6) · Commits · 戴 / test

When we enable VMAP_STACK there will not be enough room for the alignment handler at 0x600 in head_8xx.S. For now move the tail of the alignment handler out of line, and branch to it. Suggested-by:

Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by:

Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/head_8xx.S

+6 −1

Original line number	Diff line number	Diff line
		@@ -145,7 +145,7 @@ Alignment:
		li r6, RPN_PATTERN
		mtspr SPRN_DAR, r6 /* Tag DAR, to be used in DTLB Error */
		addi r3,r1,STACK_FRAME_OVERHEAD
		EXC_XFER_STD(0x600, alignment_exception)
		b .Lalignment_exception_ool

		/* Program check exception */
		EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD)
		@@ -153,6 +153,11 @@ Alignment:
		/* Decrementer */
		EXCEPTION(0x900, Decrementer, timer_interrupt, EXC_XFER_LITE)

		/* With VMAP_STACK there's not enough room for this at 0x600 */
		. = 0xa00
		.Lalignment_exception_ool:
		EXC_XFER_STD(0x600, alignment_exception)

		/* System call */
		. = 0xc00
		SystemCall:

Admin message