From ad73d8d4f4a7994b234020fc6484c87672b0c404 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin <npiggin@gmail.com> Date: Fri, 28 Jun 2019 15:33:24 +1000 Subject: [PATCH] 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> --- arch/powerpc/kernel/exceptions-64s.S | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 823e930b6e3e5..d8f1d70c675f8 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -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. */ \ -- 2.30.2