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powerpc/64s: Merge HV and non-HV paths for doorbell IRQ replay 

This results in smaller code, and fewer branches. This relies on the
fact that both the 0xe80 and 0xa00 handlers call the same upper level
code, namely doorbell_exception().

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Mention we rely on the implementation of the 0xe80/0xa00 handlers]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin 2017-08-12 02:39:03 +10:00 committed by Michael Ellerman
parent 6f881eaeb5
commit d6f73fc69b
3 changed files with 2 additions and 8 deletions
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6
arch/powerpc/kernel/entry_64.S
View File

@ -966,11 +966,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
#ifdef CONFIG_PPC_BOOK3E
cmpwi cr0,r3,0x280
#else
BEGIN_FTR_SECTION
cmpwi cr0,r3,0xe80
FTR_SECTION_ELSE
cmpwi cr0,r3,0xa00
ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
cmpwi cr0,r3,0xa00
#endif /* CONFIG_PPC_BOOK3E */
bne 1f
addi r3,r1,STACK_FRAME_OVERHEAD;

2
arch/powerpc/kernel/exceptions-64s.S
View File

@ -1676,7 +1676,7 @@ _GLOBAL(__replay_interrupt)
cmpwi r3,0x500
beq hardware_interrupt_common
BEGIN_FTR_SECTION
cmpwi r3,0xe80
cmpwi r3,0xa00
beq h_doorbell_common_msgclr
cmpwi r3,0xea0
beq h_virt_irq_common

2
arch/powerpc/kernel/irq.c
View File

@ -207,8 +207,6 @@ notrace unsigned int __check_irq_replay(void)
#else
if (happened & PACA_IRQ_DBELL) {
local_paca->irq_happened &= ~PACA_IRQ_DBELL;
if (cpu_has_feature(CPU_FTR_HVMODE))
return 0xe80;
return 0xa00;
}
#endif /* CONFIG_PPC_BOOK3E */