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Diffstat (limited to 'arch/powerpc/include/asm/hw_irq.h')
-rw-r--r--arch/powerpc/include/asm/hw_irq.h56
1 files changed, 31 insertions, 25 deletions
diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h
index f96280ee9540..5c82bb116832 100644
--- a/arch/powerpc/include/asm/hw_irq.h
+++ b/arch/powerpc/include/asm/hw_irq.h
@@ -29,7 +29,7 @@
#define PACA_IRQ_HMI 0x20
/*
- * flags for paca->soft_enabled
+ * flags for paca->irq_soft_mask
*/
#define IRQS_ENABLED 0
#define IRQS_DISABLED 1
@@ -49,14 +49,14 @@ extern void unknown_exception(struct pt_regs *regs);
#ifdef CONFIG_PPC64
#include <asm/paca.h>
-static inline notrace unsigned long soft_enabled_return(void)
+static inline notrace unsigned long irq_soft_mask_return(void)
{
unsigned long flags;
asm volatile(
"lbz %0,%1(13)"
: "=r" (flags)
- : "i" (offsetof(struct paca_struct, soft_enabled)));
+ : "i" (offsetof(struct paca_struct, irq_soft_mask)));
return flags;
}
@@ -64,18 +64,24 @@ static inline notrace unsigned long soft_enabled_return(void)
/*
* The "memory" clobber acts as both a compiler barrier
* for the critical section and as a clobber because
- * we changed paca->soft_enabled
+ * we changed paca->irq_soft_mask
*/
-static inline notrace void soft_enabled_set(unsigned long enable)
+static inline notrace void irq_soft_mask_set(unsigned long mask)
{
#ifdef CONFIG_TRACE_IRQFLAGS
/*
- * mask must always include LINUX bit if any are set, and
- * interrupts don't get replayed until the Linux interrupt is
- * unmasked. This could be changed to replay partial unmasks
- * in future, which would allow Linux masks to nest inside
- * other masks, among other things. For now, be very dumb and
- * simple.
+ * The irq mask must always include the STD bit if any are set.
+ *
+ * and interrupts don't get replayed until the standard
+ * interrupt (local_irq_disable()) is unmasked.
+ *
+ * Other masks must only provide additional masking beyond
+ * the standard, and they are also not replayed until the
+ * standard interrupt becomes unmasked.
+ *
+ * This could be changed, but it will require partial
+ * unmasks to be replayed, among other things. For now, take
+ * the simple approach.
*/
WARN_ON(mask && !(mask & IRQS_DISABLED));
#endif
@@ -83,12 +89,12 @@ static inline notrace void soft_enabled_set(unsigned long enable)
asm volatile(
"stb %0,%1(13)"
:
- : "r" (enable),
- "i" (offsetof(struct paca_struct, soft_enabled))
+ : "r" (mask),
+ "i" (offsetof(struct paca_struct, irq_soft_mask))
: "memory");
}
-static inline notrace unsigned long soft_enabled_set_return(unsigned long mask)
+static inline notrace unsigned long irq_soft_mask_set_return(unsigned long mask)
{
unsigned long flags;
@@ -99,7 +105,7 @@ static inline notrace unsigned long soft_enabled_set_return(unsigned long mask)
asm volatile(
"lbz %0,%1(13); stb %2,%1(13)"
: "=&r" (flags)
- : "i" (offsetof(struct paca_struct, soft_enabled)),
+ : "i" (offsetof(struct paca_struct, irq_soft_mask)),
"r" (mask)
: "memory");
@@ -108,12 +114,12 @@ static inline notrace unsigned long soft_enabled_set_return(unsigned long mask)
static inline unsigned long arch_local_save_flags(void)
{
- return soft_enabled_return();
+ return irq_soft_mask_return();
}
static inline void arch_local_irq_disable(void)
{
- soft_enabled_set(IRQS_DISABLED);
+ irq_soft_mask_set(IRQS_DISABLED);
}
extern void arch_local_irq_restore(unsigned long);
@@ -125,7 +131,7 @@ static inline void arch_local_irq_enable(void)
static inline unsigned long arch_local_irq_save(void)
{
- return soft_enabled_set_return(IRQS_DISABLED);
+ return irq_soft_mask_set_return(IRQS_DISABLED);
}
static inline bool arch_irqs_disabled_flags(unsigned long flags)
@@ -146,13 +152,13 @@ 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 = soft_enabled_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_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)