From: Nicholas Piggin <npiggin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Piggin <npiggin@gmail.com>
Subject: [PATCH v2 01/14] powerpc/64s: masked interrupt avoid branch
Date: Sat, 12 Aug 2017 02:38:59 +1000 [thread overview]
Message-ID: <20170811163912.28783-2-npiggin@gmail.com> (raw)
In-Reply-To: <20170811163912.28783-1-npiggin@gmail.com>
Interrupts which do not require EE to be cleared can all
be tested with a single bitwise test.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/kernel/exceptions-64s.S | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index f14f3c04ec7e..f8ad3f0eb383 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1370,10 +1370,8 @@ masked_##_H##interrupt: \
ori r10,r10,0xffff; \
mtspr SPRN_DEC,r10; \
b MASKED_DEC_HANDLER_LABEL; \
-1: cmpwi r10,PACA_IRQ_DBELL; \
- beq 2f; \
- cmpwi r10,PACA_IRQ_HMI; \
- beq 2f; \
+1: andi. r10,r10,(PACA_IRQ_DBELL|PACA_IRQ_HMI); \
+ bne 2f; \
mfspr r10,SPRN_##_H##SRR1; \
rldicl r10,r10,48,1; /* clear MSR_EE */ \
rotldi r10,r10,16; \
--
2.13.3
next prev parent reply other threads:[~2017-08-11 16:39 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-11 16:38 [PATCH v2 00/14] idle and soft-irq improvements and POWER9 idle optimisation Nicholas Piggin
2017-08-11 16:38 ` Nicholas Piggin [this message]
2017-08-24 12:37 ` [v2,01/14] powerpc/64s: masked interrupt avoid branch Michael Ellerman
2017-08-11 16:39 ` [PATCH v2 02/14] powerpc/64s: masked interrupt avoid instruction Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 03/14] powerpc/64s: masked interrupt returns to kernel so avoid r13 restore Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 04/14] powerpc/64: cleanup __check_irq_replay Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 05/14] powerpc/64s: irq replay merge HV and non-HV paths for doorbell replay Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 06/14] powerpc/64s: irq replay external use the HV handler in HV mode on POWER9 Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 07/14] powerpc/64: remove redundant instruction in interrupt replay Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 08/14] powerpc/64s: irq replay remove spurious irq reason Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 09/14] powerpc/64: runlatch CTRL[RUN] set optimisation Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 10/14] KVM: PPC: Book3S HV: POWER9 does not require secondary thread management Nicholas Piggin
2017-08-24 9:34 ` Paul Mackerras
2017-08-24 12:45 ` Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 11/14] powerpc/64s: idle POWER9 can execute stop without a sync sequence Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 12/14] KVM: PPC: Book3S HV: " Nicholas Piggin
2017-08-24 10:27 ` Paul Mackerras
2017-08-24 12:53 ` Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 13/14] powerpc/64s: idle POWER9 can execute stop in virtual mode Nicholas Piggin
2017-08-11 16:39 ` [PATCH v2 14/14] powerpc/64s: idle ESL=0 stop can avoid MSR and save/restore overhead Nicholas Piggin
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