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powerpc/64s/exception: move machine check windup in_mce handling 

Move in_mce decrement earlier before registers are restored (but
still after RI=0). This helps with later consolidation.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin 2019-06-28 15:33:24 +10:00 committed by Michael Ellerman
parent 9592b29a9c
commit ad73d8d4f4
1 changed files with 4 additions and 4 deletions
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8
arch/powerpc/kernel/exceptions-64s.S
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@ -1080,6 +1080,10 @@ EXC_COMMON_BEGIN(machine_check_common)
/* Clear MSR_RI before setting SRR0 and SRR1. */\
li r9,0; \
mtmsrd r9,1; /* Clear MSR_RI */ \
/* Decrement paca->in_mce now RI is clear. */ \
lhz r12,PACA_IN_MCE(r13); \
subi r12,r12,1; \
sth r12,PACA_IN_MCE(r13); \
/* Move original SRR0 and SRR1 into the respective regs */ \
ld r9,_MSR(r1); \
mtspr SPRN_SRR1,r9; \
@ -1096,10 +1100,6 @@ EXC_COMMON_BEGIN(machine_check_common)
REST_GPR(10, r1); \
ld r11,_CCR(r1); \
mtcr r11; \
/* Decrement paca->in_mce. */ \
lhz r12,PACA_IN_MCE(r13); \
subi r12,r12,1; \
sth r12,PACA_IN_MCE(r13); \
REST_GPR(11, r1); \
REST_2GPRS(12, r1); \
/* restore original r1. */ \