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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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19
arch/powerpc/include/asm/hw_irq.h
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@@ -27,12 +27,15 @@
#define PACA_IRQ_DEC 0x08 /* Or FIT */
#define PACA_IRQ_EE_EDGE 0x10 /* BookE only */
#define PACA_IRQ_HMI 0x20
#define PACA_IRQ_PMI 0x40
/*
* flags for paca->irq_soft_mask
*/
#define IRQS_ENABLED 0
#define IRQS_DISABLED 1
#define IRQS_DISABLED 1 /* local_irq_disable() interrupts */
#define IRQS_PMI_DISABLED 2
#define IRQS_ALL_DISABLED (IRQS_DISABLED | IRQS_PMI_DISABLED)
#endif /* CONFIG_PPC64 */
@@ -152,13 +155,13 @@ static inline bool arch_irqs_disabled(void)
#define __hard_irq_disable() __mtmsrd(local_paca->kernel_msr, 1)
#endif
#define hard_irq_disable() do { \
unsigned long flags; \
__hard_irq_disable(); \
flags = irq_soft_mask_set_return(IRQS_DISABLED); \
local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \
if (!arch_irqs_disabled_flags(flags)) \
trace_hardirqs_off(); \
#define hard_irq_disable() do { \
unsigned long flags; \
__hard_irq_disable(); \
flags = irq_soft_mask_set_return(IRQS_ALL_DISABLED); \
local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \
if (!arch_irqs_disabled_flags(flags)) \
trace_hardirqs_off(); \
} while(0)
static inline bool lazy_irq_pending(void)