summaryrefslogtreecommitdiff
path: root/arch/powerpc/include
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/include')
-rw-r--r--arch/powerpc/include/asm/exception-64s.h34
-rw-r--r--arch/powerpc/include/asm/hw_irq.h49
-rw-r--r--arch/powerpc/include/asm/irqflags.h37
-rw-r--r--arch/powerpc/include/asm/paca.h2
4 files changed, 78 insertions, 44 deletions
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 70354af0740e..548da3aa0a30 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -232,23 +232,30 @@ label##_hv: \
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
EXC_HV, KVMTEST, vec)
-#define __SOFTEN_TEST(h) \
+/* This associate vector numbers with bits in paca->irq_happened */
+#define SOFTEN_VALUE_0x500 PACA_IRQ_EE
+#define SOFTEN_VALUE_0x502 PACA_IRQ_EE
+#define SOFTEN_VALUE_0x900 PACA_IRQ_DEC
+#define SOFTEN_VALUE_0x982 PACA_IRQ_DEC
+
+#define __SOFTEN_TEST(h, vec) \
lbz r10,PACASOFTIRQEN(r13); \
cmpwi r10,0; \
+ li r10,SOFTEN_VALUE_##vec; \
beq masked_##h##interrupt
-#define _SOFTEN_TEST(h) __SOFTEN_TEST(h)
+#define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec)
#define SOFTEN_TEST_PR(vec) \
KVMTEST_PR(vec); \
- _SOFTEN_TEST(EXC_STD)
+ _SOFTEN_TEST(EXC_STD, vec)
#define SOFTEN_TEST_HV(vec) \
KVMTEST(vec); \
- _SOFTEN_TEST(EXC_HV)
+ _SOFTEN_TEST(EXC_HV, vec)
#define SOFTEN_TEST_HV_201(vec) \
KVMTEST(vec); \
- _SOFTEN_TEST(EXC_STD)
+ _SOFTEN_TEST(EXC_STD, vec)
#define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \
HMT_MEDIUM; \
@@ -279,22 +286,7 @@ label##_hv: \
*/
/* Exception addition: Hard disable interrupts */
-#ifdef CONFIG_TRACE_IRQFLAGS
-#define DISABLE_INTS \
- lbz r10,PACASOFTIRQEN(r13); \
- li r11,0; \
- cmpwi cr0,r10,0; \
- stb r11,PACAHARDIRQEN(r13); \
- beq 44f; \
- stb r11,PACASOFTIRQEN(r13); \
- TRACE_DISABLE_INTS; \
-44:
-#else
-#define DISABLE_INTS \
- li r11,0; \
- stb r11,PACASOFTIRQEN(r13); \
- stb r11,PACAHARDIRQEN(r13)
-#endif /* CONFIG_TRACE_IRQFLAGS */
+#define DISABLE_INTS SOFT_DISABLE_INTS(r10,r11)
/* Exception addition: Keep interrupt state */
#define ENABLE_INTS \
diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h
index 6c6fa955baa7..51010bfc792e 100644
--- a/arch/powerpc/include/asm/hw_irq.h
+++ b/arch/powerpc/include/asm/hw_irq.h
@@ -11,6 +11,27 @@
#include <asm/ptrace.h>
#include <asm/processor.h>
+#ifdef CONFIG_PPC64
+
+/*
+ * PACA flags in paca->irq_happened.
+ *
+ * This bits are set when interrupts occur while soft-disabled
+ * and allow a proper replay. Additionally, PACA_IRQ_HARD_DIS
+ * is set whenever we manually hard disable.
+ */
+#define PACA_IRQ_HARD_DIS 0x01
+#define PACA_IRQ_DBELL 0x02
+#define PACA_IRQ_EE 0x04
+#define PACA_IRQ_DEC 0x08 /* Or FIT */
+#define PACA_IRQ_EE_EDGE 0x10 /* BookE only */
+
+#endif /* CONFIG_PPC64 */
+
+#ifndef __ASSEMBLY__
+
+extern void __replay_interrupt(unsigned int vector);
+
extern void timer_interrupt(struct pt_regs *);
#ifdef CONFIG_PPC64
@@ -42,7 +63,6 @@ static inline unsigned long arch_local_irq_disable(void)
}
extern void arch_local_irq_restore(unsigned long);
-extern void iseries_handle_interrupts(void);
static inline void arch_local_irq_enable(void)
{
@@ -72,12 +92,24 @@ static inline bool arch_irqs_disabled(void)
#define __hard_irq_disable() __mtmsrd(local_paca->kernel_msr, 1)
#endif
-#define hard_irq_disable() \
- do { \
- __hard_irq_disable(); \
- get_paca()->soft_enabled = 0; \
- get_paca()->hard_enabled = 0; \
- } while(0)
+static inline void hard_irq_disable(void)
+{
+ __hard_irq_disable();
+ get_paca()->soft_enabled = 0;
+ get_paca()->irq_happened |= PACA_IRQ_HARD_DIS;
+}
+
+/*
+ * This is called by asynchronous interrupts to conditionally
+ * re-enable hard interrupts when soft-disabled after having
+ * cleared the source of the interrupt
+ */
+static inline void may_hard_irq_enable(void)
+{
+ get_paca()->irq_happened &= ~PACA_IRQ_HARD_DIS;
+ if (!(get_paca()->irq_happened & PACA_IRQ_EE))
+ __hard_irq_enable();
+}
static inline bool arch_irq_disabled_regs(struct pt_regs *regs)
{
@@ -149,6 +181,8 @@ static inline bool arch_irq_disabled_regs(struct pt_regs *regs)
return !(regs->msr & MSR_EE);
}
+static inline void may_hard_irq_enable(void) { }
+
#endif /* CONFIG_PPC64 */
#define ARCH_IRQ_INIT_FLAGS IRQ_NOREQUEST
@@ -159,5 +193,6 @@ static inline bool arch_irq_disabled_regs(struct pt_regs *regs)
*/
struct irq_chip;
+#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_HW_IRQ_H */
diff --git a/arch/powerpc/include/asm/irqflags.h b/arch/powerpc/include/asm/irqflags.h
index b0b06d85788d..6f9b6e23dc5a 100644
--- a/arch/powerpc/include/asm/irqflags.h
+++ b/arch/powerpc/include/asm/irqflags.h
@@ -39,24 +39,31 @@
#define TRACE_ENABLE_INTS TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on)
#define TRACE_DISABLE_INTS TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off)
-#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip) \
- cmpdi en,0; \
- bne 95f; \
- stb en,PACASOFTIRQEN(r13); \
- TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off) \
- b skip; \
-95: TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on) \
- li en,1;
-#define TRACE_AND_RESTORE_IRQ(en) \
- TRACE_AND_RESTORE_IRQ_PARTIAL(en,96f); \
- stb en,PACASOFTIRQEN(r13); \
-96:
+/*
+ * This is used by assembly code to soft-disable interrupts
+ */
+#define SOFT_DISABLE_INTS(__rA, __rB) \
+ lbz __rA,PACASOFTIRQEN(r13); \
+ lbz __rB,PACAIRQHAPPENED(r13); \
+ cmpwi cr0,__rA,0; \
+ li __rA,0; \
+ ori __rB,__rB,PACA_IRQ_HARD_DIS; \
+ stb __rB,PACAIRQHAPPENED(r13); \
+ beq 44f; \
+ stb __rA,PACASOFTIRQEN(r13); \
+ TRACE_DISABLE_INTS; \
+44:
+
#else
#define TRACE_ENABLE_INTS
#define TRACE_DISABLE_INTS
-#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip)
-#define TRACE_AND_RESTORE_IRQ(en) \
- stb en,PACASOFTIRQEN(r13)
+
+#define SOFT_DISABLE_INTS(__rA, __rB) \
+ lbz __rA,PACAIRQHAPPENED(r13); \
+ li __rB,0; \
+ ori __rA,__rA,PACA_IRQ_HARD_DIS; \
+ stb __rB,PACASOFTIRQEN(r13); \
+ stb __rA,PACAIRQHAPPENED(r13)
#endif
#endif
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index 269c05a36d91..daf813fea91f 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -132,7 +132,7 @@ struct paca_struct {
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 hard_enabled; /* set if irqs are enabled in MSR */
+ 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 */
u8 nap_state_lost; /* NV GPR values lost in power7_idle */