From: Nicholas Piggin <npiggin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Piggin <npiggin@gmail.com>
Subject: [PATCH v3 05/13] powerpc/64s/exception: move machine check windup in_mce handling
Date: Fri, 28 Jun 2019 15:33:24 +1000 [thread overview]
Message-ID: <20190628053332.22366-6-npiggin@gmail.com> (raw)
In-Reply-To: <20190628053332.22366-1-npiggin@gmail.com>
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>
---
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 b1dfd0af0120..c1d9ec5fe849 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. */ \
--
2.20.1
next prev parent reply other threads:[~2019-06-28 5:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-28 5:33 [PATCH v3 00/13] next batch of interrupt handler improvements Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 01/13] powerpc/64s/exception: clean up system call entry Nicholas Piggin
2019-07-04 15:52 ` Michael Ellerman
2019-06-28 5:33 ` [PATCH v3 02/13] powerpc/64s/exception: avoid SPR RAW scoreboard stall in real mode entry Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 03/13] powerpc/64s/exception: mtmsrd L=1 cleanup Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 04/13] powerpc/64s/exception: windup use r9 consistently to restore SPRs Nicholas Piggin
2019-06-28 5:33 ` Nicholas Piggin [this message]
2019-06-28 5:33 ` [PATCH v3 06/13] powerpc/64s/exception: simplify hmi windup code Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 07/13] powerpc/64s/exception: shuffle windup code around Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 08/13] powerpc/64s/exception: use common macro for windup Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 09/13] powerpc/64s/exception: add dar and dsisr options to exception macro Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 10/13] powerpc/64s/exception: machine check use standard macros to save dar/dsisr Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 11/13] powerpc/64s/exception: denorm handler use standard scratch save macro Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 12/13] powerpc/64s/exception: move SET_SCRATCH0 into EXCEPTION_PROLOG_0 Nicholas Piggin
2019-06-28 5:33 ` [PATCH v3 13/13] powerpc/tm: update comment about interrupt re-entrancy Nicholas Piggin
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