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| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | 2017-12-20 06:55:53 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-19 14:37:02 +0300 |
| commit | f442d004806e31fe5aab614ec48e53f7b38f7c2d (patch) | |
| tree | 6d4db2dcff2b070ef751bac009a17b2528bb922e /arch/powerpc/kernel/irq.c | |
| parent | f14e953b191fcb0da82ef066597df731b683a957 (diff) | |
| download | linux-f442d004806e31fe5aab614ec48e53f7b38f7c2d.tar.xz | |
powerpc/64s: Add support to mask perf interrupts and replay them
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>
Diffstat (limited to 'arch/powerpc/kernel/irq.c')
| -rw-r--r-- | arch/powerpc/kernel/irq.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index e137b98dc5f8..1a41cceddfe2 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -186,6 +186,11 @@ notrace unsigned int __check_irq_replay(void) return 0x900; } + if (happened & PACA_IRQ_PMI) { + local_paca->irq_happened &= ~PACA_IRQ_PMI; + return 0xf00; + } + if (happened & PACA_IRQ_EE) { local_paca->irq_happened &= ~PACA_IRQ_EE; return 0x500; @@ -272,7 +277,7 @@ notrace void arch_local_irq_restore(unsigned long mask) } #endif /* CONFIG_TRACE_IRQFLAGS */ - irq_soft_mask_set(IRQS_DISABLED); + irq_soft_mask_set(IRQS_ALL_DISABLED); trace_hardirqs_off(); /* |