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powerpc/64s: Add support to mask perf interrupts and replay them

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Two new bit mask field "IRQ_DISABLE_MASK_PMU" is introduced to support
the masking of PMI and "IRQ_DISABLE_MASK_ALL" to aid interrupt masking
checking.

Couple of new irq #defs "PACA_IRQ_PMI" and "SOFTEN_VALUE_0xf0*" added
to use in the exception code to check for PMI interrupts.

In the masked_interrupt handler, for PMIs we reset the MSR[EE] and
return. In the __check_irq_replay(), replay the PMI interrupt by
calling performance_monitor_common handler.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Madhavan Srinivasan
2017-12-20 09:25:53 +05:30
committed by Michael Ellerman
parent f14e953b19
commit f442d00480
5 changed files with 31 additions and 11 deletions
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5
arch/powerpc/kernel/entry_64.S
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@@ -954,6 +954,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
addi r3,r1,STACK_FRAME_OVERHEAD;
bl do_IRQ
b ret_from_except
1: cmpwi cr0,r3,0xf00
bne 1f
addi r3,r1,STACK_FRAME_OVERHEAD;
bl performance_monitor_exception
b ret_from_except
1: cmpwi cr0,r3,0xe60
bne 1f
addi r3,r1,STACK_FRAME_OVERHEAD;