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powerpc/pseries: PACA save area fix for general exception vs MCE
authorNicholas Piggin <npiggin@gmail.com>
Wed, 10 Aug 2016 10:48:42 +0000 (20:48 +1000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Mon, 22 Aug 2016 01:09:33 +0000 (11:09 +1000)
MCE must not use PACA_EXGEN. When a general exception enables MSR_RI,
that means SPRN_SRR[01] and SPRN_SPRG are no longer used. However the
PACA save area is still in use.
Acked-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/kernel/exceptions-64s.S patch | blob | blame | history

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index df6d45eb41150185e7cc17baa82feead23fa27f3..034b7eaf68d2cf2091999d433fe9f8e19ed4220b 100644 (file)
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -969,14 +969,14 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
 machine_check_common:
 
        mfspr   r10,SPRN_DAR
-       std     r10,PACA_EXGEN+EX_DAR(r13)
+       std     r10,PACA_EXMC+EX_DAR(r13)
        mfspr   r10,SPRN_DSISR
-       stw     r10,PACA_EXGEN+EX_DSISR(r13)
+       stw     r10,PACA_EXMC+EX_DSISR(r13)
        EXCEPTION_PROLOG_COMMON(0x200, PACA_EXMC)
        FINISH_NAP
        RECONCILE_IRQ_STATE(r10, r11)
-       ld      r3,PACA_EXGEN+EX_DAR(r13)
-       lwz     r4,PACA_EXGEN+EX_DSISR(r13)
+       ld      r3,PACA_EXMC+EX_DAR(r13)
+       lwz     r4,PACA_EXMC+EX_DSISR(r13)
        std     r3,_DAR(r1)
        std     r4,_DSISR(r1)
        bl      save_nvgprs