Commit 2a2d7bef authored Oct 27, 2017 by Vasily Gorbik Committed by Martin Schwidefsky Nov 02, 2017

s390/nmi: avoid using long-displacement facility



__LC_MCESAD is currently 4528 /* offsetof(struct lowcore, mcesad) */
that would require long-displacement facility for lg, which we don't
have on z900.

Fixes: 3037a52f ("s390/nmi: do register validation as early as possible")
Signed-off-by: Vasily Gorbik <gor@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent 3b42c17a

arch/s390/kernel/entry.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -964,7 +964,7 @@ ENTRY(mcck_int_handler)
		la %r14,4095
		lctlg %c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r14) # validate ctl regs
		ptlb
		lg %r11,__LC_MCESAD # extended machine check save area
		lg %r11,__LC_MCESAD-4095(%r14) # extended machine check save area
		nill %r11,0xfc00 # MCESA_ORIGIN_MASK
		TSTMSK __LC_CREGS_SAVE_AREA+16-4095(%r14),CR2_GUARDED_STORAGE
		jno 0f

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