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| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | 2017-12-20 09:25:55 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-19 22:37:03 +1100 |
| commit | c6424382de996c216e81cfccf5cf2371157df651 (patch) | |
| tree | 48f520f96895adaeeb59c7c44a08fd41cdf713a9 | |
| parent | 9aa88188ee87f4cc5c4e1bce15754bfcde8e900f (diff) | |
| download | linux-c6424382de996c216e81cfccf5cf2371157df651.tar.bz2 | |
powerpc/64s: Add new set of irq_soft_mask_ functions for PMI masking
To support soft-masking of the performance monitor interrupt, a set of
new powerpc_local_irq_pmu_save() and powerpc_local_irq_restore()
functions are added. And powerpc_local_irq_save() implemented, by
adding a new irq_soft_mask manipulation function
irq_soft_mask_or_return().
Local_irq_pmu_* macros are provided to access these
powerpc_local_irq_pmu* functions which includes
trace_hardirqs_on|off() to match what we have in
include/linux/irqflags.h.
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/include/asm/hw_irq.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h index f40da3bd079b..88e5e8f17e98 100644 --- a/arch/powerpc/include/asm/hw_irq.h +++ b/arch/powerpc/include/asm/hw_irq.h @@ -115,6 +115,24 @@ static inline notrace unsigned long irq_soft_mask_set_return(unsigned long mask) return flags; } +static inline notrace unsigned long irq_soft_mask_or_return(unsigned long mask) +{ + unsigned long flags, tmp; + + asm volatile( + "lbz %0,%2(13); or %1,%0,%3; stb %1,%2(13)" + : "=&r" (flags), "=r" (tmp) + : "i" (offsetof(struct paca_struct, irq_soft_mask)), + "r" (mask) + : "memory"); + +#ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG + WARN_ON((mask | flags) && !((mask | flags) & IRQS_DISABLED)); +#endif + + return flags; +} + static inline unsigned long arch_local_save_flags(void) { return irq_soft_mask_return(); @@ -147,6 +165,55 @@ static inline bool arch_irqs_disabled(void) return arch_irqs_disabled_flags(arch_local_save_flags()); } +#ifdef CONFIG_PPC_BOOK3S +/* + * To support disabling and enabling of irq with PMI, set of + * new powerpc_local_irq_pmu_save() and powerpc_local_irq_restore() + * functions are added. These macros are implemented using generic + * linux local_irq_* code from include/linux/irqflags.h. + */ +#define raw_local_irq_pmu_save(flags) \ + do { \ + typecheck(unsigned long, flags); \ + flags = irq_soft_mask_or_return(IRQS_DISABLED | \ + IRQS_PMI_DISABLED); \ + } while(0) + +#define raw_local_irq_pmu_restore(flags) \ + do { \ + typecheck(unsigned long, flags); \ + arch_local_irq_restore(flags); \ + } while(0) + +#ifdef CONFIG_TRACE_IRQFLAGS +#define powerpc_local_irq_pmu_save(flags) \ + do { \ + raw_local_irq_pmu_save(flags); \ + trace_hardirqs_off(); \ + } while(0) +#define powerpc_local_irq_pmu_restore(flags) \ + do { \ + if (raw_irqs_disabled_flags(flags)) { \ + raw_local_irq_pmu_restore(flags); \ + trace_hardirqs_off(); \ + } else { \ + trace_hardirqs_on(); \ + raw_local_irq_pmu_restore(flags); \ + } \ + } while(0) +#else +#define powerpc_local_irq_pmu_save(flags) \ + do { \ + raw_local_irq_pmu_save(flags); \ + } while(0) +#define powerpc_local_irq_pmu_restore(flags) \ + do { \ + raw_local_irq_pmu_restore(flags); \ + } while (0) +#endif /* CONFIG_TRACE_IRQFLAGS */ + +#endif /* CONFIG_PPC_BOOK3S */ + #ifdef CONFIG_PPC_BOOK3E #define __hard_irq_enable() asm volatile("wrteei 1" : : : "memory") #define __hard_irq_disable() asm volatile("wrteei 0" : : : "memory") |