[PATCH v3 01/11] powerpc: Add #defs for paca->soft_enabled flags
Madhavan Srinivasan
maddy at linux.vnet.ibm.com
Tue Nov 15 05:04:42 AEDT 2016
Two #defs IRQ_DISABLE_LEVEL_NONE and IRQ_DISABLE_LEVEL_LINUX
are added to be used when updating paca->soft_enabled.
Replace the hardcoded values used when updating
paca->soft_enabled with IRQ_DISABLE_MASK_* #def.
No logic change.
Reviewed-by: Nicholas Piggin <npiggin at gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy at linux.vnet.ibm.com>
---
arch/powerpc/include/asm/exception-64s.h | 2 +-
arch/powerpc/include/asm/hw_irq.h | 21 ++++++++++++++-------
arch/powerpc/include/asm/irqflags.h | 6 +++---
arch/powerpc/include/asm/kvm_ppc.h | 2 +-
arch/powerpc/kernel/entry_64.S | 16 ++++++++--------
arch/powerpc/kernel/exceptions-64e.S | 6 +++---
arch/powerpc/kernel/head_64.S | 5 +++--
arch/powerpc/kernel/idle_book3e.S | 3 ++-
arch/powerpc/kernel/idle_power4.S | 3 ++-
arch/powerpc/kernel/irq.c | 9 +++++----
arch/powerpc/kernel/process.c | 3 ++-
arch/powerpc/kernel/setup_64.c | 3 +++
arch/powerpc/kernel/time.c | 2 +-
arch/powerpc/mm/hugetlbpage.c | 2 +-
arch/powerpc/perf/core-book3s.c | 2 +-
15 files changed, 50 insertions(+), 35 deletions(-)
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 84d49b197c32..53ba672fe9dc 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -403,7 +403,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
#define __SOFTEN_TEST(h, vec) \
lbz r10,PACASOFTIRQEN(r13); \
- cmpwi r10,0; \
+ cmpwi r10,IRQ_DISABLE_MASK_LINUX; \
li r10,SOFTEN_VALUE_##vec; \
beq masked_##h##interrupt
diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h
index eba60416536e..05b81bca15e9 100644
--- a/arch/powerpc/include/asm/hw_irq.h
+++ b/arch/powerpc/include/asm/hw_irq.h
@@ -27,6 +27,12 @@
#define PACA_IRQ_EE_EDGE 0x10 /* BookE only */
#define PACA_IRQ_HMI 0x20
+/*
+ * flags for paca->soft_enabled
+ */
+#define IRQ_DISABLE_MASK_NONE 1
+#define IRQ_DISABLE_MASK_LINUX 0
+
#endif /* CONFIG_PPC64 */
#ifndef __ASSEMBLY__
@@ -58,9 +64,10 @@ static inline unsigned long arch_local_irq_disable(void)
unsigned long flags, zero;
asm volatile(
- "li %1,0; lbz %0,%2(13); stb %1,%2(13)"
+ "li %1,%3; lbz %0,%2(13); stb %1,%2(13)"
: "=r" (flags), "=&r" (zero)
- : "i" (offsetof(struct paca_struct, soft_enabled))
+ : "i" (offsetof(struct paca_struct, soft_enabled)),\
+ "i" (IRQ_DISABLE_MASK_LINUX)
: "memory");
return flags;
@@ -70,7 +77,7 @@ extern void arch_local_irq_restore(unsigned long);
static inline void arch_local_irq_enable(void)
{
- arch_local_irq_restore(1);
+ arch_local_irq_restore(IRQ_DISABLE_MASK_NONE);
}
static inline unsigned long arch_local_irq_save(void)
@@ -80,7 +87,7 @@ static inline unsigned long arch_local_irq_save(void)
static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
- return flags == 0;
+ return flags == IRQ_DISABLE_MASK_LINUX;
}
static inline bool arch_irqs_disabled(void)
@@ -100,9 +107,9 @@ static inline bool arch_irqs_disabled(void)
u8 _was_enabled; \
__hard_irq_disable(); \
_was_enabled = local_paca->soft_enabled; \
- local_paca->soft_enabled = 0; \
+ local_paca->soft_enabled = IRQ_DISABLE_MASK_LINUX;\
local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \
- if (_was_enabled) \
+ if (_was_enabled == IRQ_DISABLE_MASK_NONE) \
trace_hardirqs_off(); \
} while(0)
@@ -125,7 +132,7 @@ static inline void may_hard_irq_enable(void)
static inline bool arch_irq_disabled_regs(struct pt_regs *regs)
{
- return !regs->softe;
+ return (regs->softe == IRQ_DISABLE_MASK_LINUX);
}
extern bool prep_irq_for_idle(void);
diff --git a/arch/powerpc/include/asm/irqflags.h b/arch/powerpc/include/asm/irqflags.h
index f2149066fe5d..d0ed2a7d7d10 100644
--- a/arch/powerpc/include/asm/irqflags.h
+++ b/arch/powerpc/include/asm/irqflags.h
@@ -48,8 +48,8 @@
#define RECONCILE_IRQ_STATE(__rA, __rB) \
lbz __rA,PACASOFTIRQEN(r13); \
lbz __rB,PACAIRQHAPPENED(r13); \
- cmpwi cr0,__rA,0; \
- li __rA,0; \
+ cmpwi cr0,__rA,IRQ_DISABLE_MASK_LINUX;\
+ li __rA,IRQ_DISABLE_MASK_LINUX; \
ori __rB,__rB,PACA_IRQ_HARD_DIS; \
stb __rB,PACAIRQHAPPENED(r13); \
beq 44f; \
@@ -63,7 +63,7 @@
#define RECONCILE_IRQ_STATE(__rA, __rB) \
lbz __rA,PACAIRQHAPPENED(r13); \
- li __rB,0; \
+ li __rB,IRQ_DISABLE_MASK_LINUX; \
ori __rA,__rA,PACA_IRQ_HARD_DIS; \
stb __rB,PACASOFTIRQEN(r13); \
stb __rA,PACAIRQHAPPENED(r13)
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index f6e49640dbe1..7d8d2b40c6a8 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -735,7 +735,7 @@ 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;
- local_paca->soft_enabled = 1;
+ local_paca->soft_enabled = IRQ_DISABLE_MASK_NONE;
#endif
}
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 6432d4bf08c8..8e347ffca14e 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -132,7 +132,7 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
*/
#if defined(CONFIG_TRACE_IRQFLAGS) && defined(CONFIG_BUG)
lbz r10,PACASOFTIRQEN(r13)
- xori r10,r10,1
+ xori r10,r10,IRQ_DISABLE_MASK_NONE
1: tdnei r10,0
EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,BUGFLAG_WARNING
#endif
@@ -148,7 +148,7 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
/* We do need to set SOFTE in the stack frame or the return
* from interrupt will be painful
*/
- li r10,1
+ li r10,IRQ_DISABLE_MASK_NONE
std r10,SOFTE(r1)
CURRENT_THREAD_INFO(r11, r1)
@@ -724,7 +724,7 @@ resume_kernel:
lwz r8,TI_PREEMPT(r9)
cmpwi cr1,r8,0
ld r0,SOFTE(r1)
- cmpdi r0,0
+ cmpdi r0,IRQ_DISABLE_MASK_LINUX
crandc eq,cr1*4+eq,eq
bne restore
@@ -764,11 +764,11 @@ restore:
*/
ld r5,SOFTE(r1)
lbz r6,PACASOFTIRQEN(r13)
- cmpwi cr0,r5,0
+ cmpwi cr0,r5,IRQ_DISABLE_MASK_LINUX
beq restore_irq_off
/* We are enabling, were we already enabled ? Yes, just return */
- cmpwi cr0,r6,1
+ cmpwi cr0,r6,IRQ_DISABLE_MASK_NONE
beq cr0,do_restore
/*
@@ -787,7 +787,7 @@ restore:
*/
restore_no_replay:
TRACE_ENABLE_INTS
- li r0,1
+ li r0,IRQ_DISABLE_MASK_NONE
stb r0,PACASOFTIRQEN(r13);
/*
@@ -892,7 +892,7 @@ restore_irq_off:
beq 1f
rlwinm r7,r7,0,~PACA_IRQ_HARD_DIS
stb r7,PACAIRQHAPPENED(r13)
-1: li r0,0
+1: li r0,IRQ_DISABLE_MASK_LINUX
stb r0,PACASOFTIRQEN(r13);
TRACE_DISABLE_INTS
b do_restore
@@ -1010,7 +1010,7 @@ _GLOBAL(enter_rtas)
* check it with the asm equivalent of WARN_ON
*/
lbz r0,PACASOFTIRQEN(r13)
-1: tdnei r0,0
+1: tdnei r0,IRQ_DISABLE_MASK_LINUX
EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,BUGFLAG_WARNING
#endif
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 38a1f96430e1..a39226c502c5 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -210,9 +210,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
ld r5,SOFTE(r1)
/* Interrupts had better not already be enabled... */
- twnei r6,0
+ twnei r6,IRQ_DISABLE_MASK_LINUX
- cmpwi cr0,r5,0
+ cmpwi cr0,r5,IRQ_DISABLE_MASK_LINUX
beq 1f
TRACE_ENABLE_INTS
@@ -352,7 +352,7 @@ ret_from_mc_except:
#define PROLOG_ADDITION_MASKABLE_GEN(n) \
lbz r10,PACASOFTIRQEN(r13); /* are irqs soft-disabled ? */ \
- cmpwi cr0,r10,0; /* yes -> go out of line */ \
+ cmpwi cr0,r10,IRQ_DISABLE_MASK_LINUX; /* yes -> go out of line */ \
beq masked_interrupt_book3e_##n
#define PROLOG_ADDITION_2REGS_GEN(n) \
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 04c546e20cc0..9bc378e680b5 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -752,7 +752,7 @@ _GLOBAL(pmac_secondary_start)
/* Mark interrupts soft and hard disabled (they might be enabled
* in the PACA when doing hotplug)
*/
- li r0,0
+ li r0,IRQ_DISABLE_MASK_LINUX
stb r0,PACASOFTIRQEN(r13)
li r0,PACA_IRQ_HARD_DIS
stb r0,PACAIRQHAPPENED(r13)
@@ -809,6 +809,7 @@ __secondary_start:
/* Mark interrupts soft and hard disabled (they might be enabled
* in the PACA when doing hotplug)
*/
+ li r7,IRQ_DISABLE_MASK_LINUX
stb r7,PACASOFTIRQEN(r13)
li r0,PACA_IRQ_HARD_DIS
stb r0,PACAIRQHAPPENED(r13)
@@ -974,7 +975,7 @@ start_here_common:
/* Mark interrupts soft and hard disabled (they might be enabled
* in the PACA when doing hotplug)
*/
- li r0,0
+ li r0,IRQ_DISABLE_MASK_LINUX
stb r0,PACASOFTIRQEN(r13)
li r0,PACA_IRQ_HARD_DIS
stb r0,PACAIRQHAPPENED(r13)
diff --git a/arch/powerpc/kernel/idle_book3e.S b/arch/powerpc/kernel/idle_book3e.S
index 48c21acef915..a459c306b04e 100644
--- a/arch/powerpc/kernel/idle_book3e.S
+++ b/arch/powerpc/kernel/idle_book3e.S
@@ -17,6 +17,7 @@
#include <asm/processor.h>
#include <asm/thread_info.h>
#include <asm/epapr_hcalls.h>
+#include <asm/hw_irq.h>
/* 64-bit version only for now */
#ifdef CONFIG_PPC64
@@ -46,7 +47,7 @@ _GLOBAL(\name)
bl trace_hardirqs_on
addi r1,r1,128
#endif
- li r0,1
+ li r0,IRQ_DISABLE_MASK_NONE
stb r0,PACASOFTIRQEN(r13)
/* Interrupts will make use return to LR, so get something we want
diff --git a/arch/powerpc/kernel/idle_power4.S b/arch/powerpc/kernel/idle_power4.S
index f57a19348bdd..785e10619d8d 100644
--- a/arch/powerpc/kernel/idle_power4.S
+++ b/arch/powerpc/kernel/idle_power4.S
@@ -15,6 +15,7 @@
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
#include <asm/irqflags.h>
+#include <asm/hw_irq.h>
#undef DEBUG
@@ -53,7 +54,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_CAN_NAP)
mfmsr r7
#endif /* CONFIG_TRACE_IRQFLAGS */
- li r0,1
+ li r0,IRQ_DISABLE_MASK_NONE
stb r0,PACASOFTIRQEN(r13) /* we'll hard-enable shortly */
BEGIN_FTR_SECTION
DSSALL
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 3c05c311e35e..c6f1e13ff441 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -68,6 +68,7 @@
#include <asm/debug.h>
#include <asm/livepatch.h>
#include <asm/asm-prototypes.h>
+#include <asm/hw_irq.h>
#ifdef CONFIG_PPC64
#include <asm/paca.h>
@@ -213,7 +214,7 @@ notrace void arch_local_irq_restore(unsigned long en)
/* Write the new soft-enabled value */
set_soft_enabled(en);
- if (!en)
+ if (en == IRQ_DISABLE_MASK_LINUX)
return;
/*
* From this point onward, we can take interrupts, preempt,
@@ -258,7 +259,7 @@ notrace void arch_local_irq_restore(unsigned long en)
}
#endif /* CONFIG_TRACE_IRQFLAGS */
- set_soft_enabled(0);
+ set_soft_enabled(IRQ_DISABLE_MASK_LINUX);
/*
* Check if anything needs to be re-emitted. We haven't
@@ -268,7 +269,7 @@ notrace void arch_local_irq_restore(unsigned long en)
replay = __check_irq_replay();
/* We can soft-enable now */
- set_soft_enabled(1);
+ set_soft_enabled(IRQ_DISABLE_MASK_NONE);
/*
* And replay if we have to. This will return with interrupts
@@ -342,7 +343,7 @@ bool prep_irq_for_idle(void)
* of entering the low power state.
*/
local_paca->irq_happened &= ~PACA_IRQ_HARD_DIS;
- local_paca->soft_enabled = 1;
+ local_paca->soft_enabled = IRQ_DISABLE_MASK_NONE;
/* Tell the caller to enter the low power state */
return true;
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index ce6dc61b15b2..28b85d884688 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -54,6 +54,7 @@
#include <asm/debug.h>
#ifdef CONFIG_PPC64
#include <asm/firmware.h>
+#include <asm/hw_irq.h>
#endif
#include <asm/code-patching.h>
#include <asm/exec.h>
@@ -1474,7 +1475,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childregs->gpr[14] = ppc_function_entry((void *)usp);
#ifdef CONFIG_PPC64
clear_tsk_thread_flag(p, TIF_32BIT);
- childregs->softe = 1;
+ childregs->softe = IRQ_DISABLE_MASK_NONE;
#endif
childregs->gpr[15] = kthread_arg;
p->thread.regs = NULL; /* no user register state */
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 7ac8e6eaab5b..f31930b9bfc1 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -67,6 +67,7 @@
#include <asm/livepatch.h>
#include <asm/opal.h>
#include <asm/cputhreads.h>
+#include <asm/hw_irq.h>
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
@@ -195,6 +196,8 @@ static void __init fixup_boot_paca(void)
get_paca()->cpu_start = 1;
/* Allow percpu accesses to work until we setup percpu data */
get_paca()->data_offset = 0;
+ /* Mark interrupts disabled in PACA */
+ get_paca()->soft_enabled = IRQ_DISABLE_MASK_LINUX;
}
static void __init configure_exceptions(void)
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index bc3f7d0d7b79..334144e300ca 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -269,7 +269,7 @@ void accumulate_stolen_time(void)
* needs to reflect that so various debug stuff doesn't
* complain
*/
- local_paca->soft_enabled = 0;
+ local_paca->soft_enabled = IRQ_DISABLE_MASK_LINUX;
sst = scan_dispatch_log(acct->starttime_user);
ust = scan_dispatch_log(acct->starttime);
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index a5d3ecdabc44..441fdfbb9990 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -914,7 +914,7 @@ void flush_dcache_icache_hugepage(struct page *page)
* So long as we atomically load page table pointers we are safe against teardown,
* we can follow the address down to the the page and take a ref on it.
* This function need to be called with interrupts disabled. We use this variant
- * when we have MSR[EE] = 0 but the paca->soft_enabled = 1
+ * when we have MSR[EE] = 0 but the paca->soft_enabled = IRQ_DISABLE_MASK_NONE
*/
pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 72c27b8d2cf3..a0861a8311c7 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -313,7 +313,7 @@ static inline void perf_read_regs(struct pt_regs *regs)
*/
static inline int perf_intr_is_nmi(struct pt_regs *regs)
{
- return !regs->softe;
+ return (regs->softe == IRQ_DISABLE_MASK_LINUX);
}
/*
--
2.7.4
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