powerpc/64: Rename soft_enabled to irq_soft_mask

Rename the paca->soft_enabled to paca->irq_soft_mask as it is no
longer used as a flag for interrupt state, but a mask.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

5 files changed, 41 insertions, 35 deletions

diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index a21adcb75fc6..b090db4ca37e 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -432,7 +432,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
 	mflr	r9;			/* Get LR, later save to stack	*/ \
 	ld	r2,PACATOC(r13);	/* get kernel TOC into r2	*/ \
 	std	r9,_LINK(r1);						   \
-	lbz	r10,PACASOFTIRQEN(r13);				   \
+	lbz	r10,PACAIRQSOFTMASK(r13);				   \
 	mfspr	r11,SPRN_XER;		/* save XER in stackframe	*/ \
 	std	r10,SOFTE(r1);						   \
 	std	r11,_XER(r1);						   \
@@ -498,7 +498,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
 #define SOFTEN_VALUE_0xea0	PACA_IRQ_EE
 
 #define __SOFTEN_TEST(h, vec)						\
-	lbz	r10,PACASOFTIRQEN(r13);					\
+	lbz	r10,PACAIRQSOFTMASK(r13);				\
 	andi.	r10,r10,IRQS_DISABLED;				\
 	li	r10,SOFTEN_VALUE_##vec;					\
 	bne	masked_##h##interrupt
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)
diff --git a/arch/powerpc/include/asm/irqflags.h b/arch/powerpc/include/asm/irqflags.h
index f1ec012232d9..1a6c1ce17735 100644
--- a/arch/powerpc/include/asm/irqflags.h
+++ b/arch/powerpc/include/asm/irqflags.h
@@ -47,14 +47,14 @@
  * be clobbered.
  */
 #define RECONCILE_IRQ_STATE(__rA, __rB)		\
-	lbz	__rA,PACASOFTIRQEN(r13);	\
+	lbz	__rA,PACAIRQSOFTMASK(r13);	\
 	lbz	__rB,PACAIRQHAPPENED(r13);	\
-	andi.	__rA,__rA,IRQS_DISABLED;\
-	li	__rA,IRQS_DISABLED;	\
+	andi.	__rA,__rA,IRQS_DISABLED;	\
+	li	__rA,IRQS_DISABLED;		\
 	ori	__rB,__rB,PACA_IRQ_HARD_DIS;	\
 	stb	__rB,PACAIRQHAPPENED(r13);	\
 	bne	44f;				\
-	stb	__rA,PACASOFTIRQEN(r13);	\
+	stb	__rA,PACAIRQSOFTMASK(r13);	\
 	TRACE_DISABLE_INTS;			\
 44:
 
@@ -64,9 +64,9 @@
 
 #define RECONCILE_IRQ_STATE(__rA, __rB)		\
 	lbz	__rA,PACAIRQHAPPENED(r13);	\
-	li	__rB,IRQS_DISABLED;	\
+	li	__rB,IRQS_DISABLED;		\
 	ori	__rA,__rA,PACA_IRQ_HARD_DIS;	\
-	stb	__rB,PACASOFTIRQEN(r13);	\
+	stb	__rB,PACAIRQSOFTMASK(r13);	\
 	stb	__rA,PACAIRQHAPPENED(r13)
 #endif
 #endif
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 369f0640826c..9db18287b5f4 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -873,7 +873,7 @@ static inline void kvmppc_fix_ee_before_entry(void)
 
 	/* Only need to enable IRQs by hard enabling them after this */
 	local_paca->irq_happened = 0;
-	soft_enabled_set(IRQS_ENABLED);
+	irq_soft_mask_set(IRQS_ENABLED);
 #endif
 }
 
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index 3892db93b837..e2ee193eb24d 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -159,7 +159,7 @@ struct paca_struct {
 	u64 saved_r1;			/* r1 save for RTAS calls or PM */
 	u64 saved_msr;			/* MSR saved here by enter_rtas */
 	u16 trap_save;			/* Used when bad stack is encountered */
-	u8 soft_enabled;		/* irq soft-enable flag */
+	u8 irq_soft_mask;		/* mask for irq soft masking */
 	u8 irq_happened;		/* irq happened while soft-disabled */
 	u8 io_sync;			/* writel() needs spin_unlock sync */
 	u8 irq_work_pending;		/* IRQ_WORK interrupt while soft-disable */