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powerpc/64: Add #defines for paca->soft_enabled flags 

Two #defines IRQS_ENABLED and IRQS_DISABLED are added to be used when
updating paca->soft_enabled. Replace the hardcoded values used when
updating paca->soft_enabled with IRQ_(EN|DIS)ABLED #define. No logic
change.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Madhavan Srinivasan 2017-12-20 09:25:42 +05:30 committed by Michael Ellerman
parent a8a4b03ab9
commit c2e480ba82
15 changed files with 50 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/include/asm/exception-64s.h
View File

@ -499,7 +499,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
#define __SOFTEN_TEST(h, vec) \
lbz r10,PACASOFTIRQEN(r13); \
cmpwi r10,0; \
cmpwi r10,IRQS_DISABLED; \
li r10,SOFTEN_VALUE_##vec; \
beq masked_##h##interrupt

21
arch/powerpc/include/asm/hw_irq.h
View File

@ -28,6 +28,12 @@
#define PACA_IRQ_EE_EDGE 0x10 /* BookE only */
#define PACA_IRQ_HMI 0x20
/*
* flags for paca->soft_enabled
*/
#define IRQS_ENABLED 1
#define IRQS_DISABLED 0
#endif /* CONFIG_PPC64 */
#ifndef __ASSEMBLY__
@ -60,9 +66,10 @@ 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" (IRQS_DISABLED)
: "memory");
return flags;
@ -72,7 +79,7 @@ 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(IRQS_ENABLED);
}
static inline unsigned long arch_local_irq_save(void)
@ -82,7 +89,7 @@ static inline unsigned long arch_local_irq_save(void)
static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
return flags == 0;
return flags == IRQS_DISABLED;
}
static inline bool arch_irqs_disabled(void)
@ -102,9 +109,9 @@ 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 = IRQS_DISABLED;\
local_paca->irq_happened |= PACA_IRQ_HARD_DIS; \
if (_was_enabled) \
if (_was_enabled == IRQS_ENABLED) \
trace_hardirqs_off(); \
} while(0)
@ -127,7 +134,7 @@ 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 == IRQS_DISABLED);
}
extern bool prep_irq_for_idle(void);

6
arch/powerpc/include/asm/irqflags.h
View File

@ -49,8 +49,8 @@
#define RECONCILE_IRQ_STATE(__rA, __rB) \
lbz __rA,PACASOFTIRQEN(r13); \
lbz __rB,PACAIRQHAPPENED(r13); \
cmpwi cr0,__rA,0; \
li __rA,0; \
cmpwi cr0,__rA,IRQS_DISABLED;\
li __rA,IRQS_DISABLED; \
ori __rB,__rB,PACA_IRQ_HARD_DIS; \
stb __rB,PACAIRQHAPPENED(r13); \
beq 44f; \
@ -64,7 +64,7 @@
#define RECONCILE_IRQ_STATE(__rA, __rB) \
lbz __rA,PACAIRQHAPPENED(r13); \
li __rB,0; \
li __rB,IRQS_DISABLED; \
ori __rA,__rA,PACA_IRQ_HARD_DIS; \
stb __rB,PACASOFTIRQEN(r13); \
stb __rA,PACAIRQHAPPENED(r13)

2
arch/powerpc/include/asm/kvm_ppc.h
View File

@ -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;
local_paca->soft_enabled = 1;
local_paca->soft_enabled = IRQS_ENABLED;
#endif
}

16
arch/powerpc/kernel/entry_64.S
View File

@ -130,7 +130,7 @@ 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,IRQS_ENABLED
1: tdnei r10,0
EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,BUGFLAG_WARNING
#endif
@ -147,7 +147,7 @@ system_call: /* label this so stack traces look sane */
/* We do need to set SOFTE in the stack frame or the return
* from interrupt will be painful
*/
li r10,1
li r10,IRQS_ENABLED
std r10,SOFTE(r1)
CURRENT_THREAD_INFO(r11, r1)
@ -743,7 +743,7 @@ resume_kernel:
lwz r8,TI_PREEMPT(r9)
cmpwi cr1,r8,0
ld r0,SOFTE(r1)
cmpdi r0,0
cmpdi r0,IRQS_DISABLED
crandc eq,cr1*4+eq,eq
bne restore
@ -783,11 +783,11 @@ restore:
*/
ld r5,SOFTE(r1)
lbz r6,PACASOFTIRQEN(r13)
cmpwi cr0,r5,0
cmpwi cr0,r5,IRQS_DISABLED
beq .Lrestore_irq_off
/* We are enabling, were we already enabled ? Yes, just return */
cmpwi cr0,r6,1
cmpwi cr0,r6,IRQS_ENABLED
beq cr0,.Ldo_restore
/*
@ -806,7 +806,7 @@ restore:
*/
.Lrestore_no_replay:
TRACE_ENABLE_INTS
li r0,1
li r0,IRQS_ENABLED
stb r0,PACASOFTIRQEN(r13);
/*
@ -915,7 +915,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
#if defined(CONFIG_TRACE_IRQFLAGS) && defined(CONFIG_BUG)
/* The interrupt should not have soft enabled. */
lbz r7,PACASOFTIRQEN(r13)
1: tdnei r7,0
1: tdnei r7,IRQS_DISABLED
EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,BUGFLAG_WARNING
#endif
b .Ldo_restore
@ -1036,7 +1036,7 @@ _GLOBAL(enter_rtas)
* check it with the asm equivalent of WARN_ON
*/
lbz r0,PACASOFTIRQEN(r13)
1: tdnei r0,0
1: tdnei r0,IRQS_DISABLED
EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,BUGFLAG_WARNING
#endif

6
arch/powerpc/kernel/exceptions-64e.S
View File

@ -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,IRQS_DISABLED
cmpwi cr0,r5,0
cmpwi cr0,r5,IRQS_DISABLED
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,IRQS_DISABLED; /* yes -> go out of line */ \
beq masked_interrupt_book3e_##n
#define PROLOG_ADDITION_2REGS_GEN(n) \

5
arch/powerpc/kernel/head_64.S
View File

@ -765,7 +765,7 @@ _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,IRQS_DISABLED
stb r0,PACASOFTIRQEN(r13)
li r0,PACA_IRQ_HARD_DIS
stb r0,PACAIRQHAPPENED(r13)
@ -822,6 +822,7 @@ __secondary_start:
/* Mark interrupts soft and hard disabled (they might be enabled
* in the PACA when doing hotplug)
*/
li r7,IRQS_DISABLED
stb r7,PACASOFTIRQEN(r13)
li r0,PACA_IRQ_HARD_DIS
stb r0,PACAIRQHAPPENED(r13)
@ -988,7 +989,7 @@ start_here_common:
/* Mark interrupts soft and hard disabled (they might be enabled
* in the PACA when doing hotplug)
*/
li r0,0
li r0,IRQS_DISABLED
stb r0,PACASOFTIRQEN(r13)
li r0,PACA_IRQ_HARD_DIS
stb r0,PACAIRQHAPPENED(r13)

3
arch/powerpc/kernel/idle_book3e.S
View File

@ -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,IRQS_ENABLED
stb r0,PACASOFTIRQEN(r13)
/* Interrupts will make use return to LR, so get something we want

3
arch/powerpc/kernel/idle_power4.S
View File

@ -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,IRQS_ENABLED
stb r0,PACASOFTIRQEN(r13) /* we'll hard-enable shortly */
BEGIN_FTR_SECTION
DSSALL

9
arch/powerpc/kernel/irq.c
View File

@ -67,6 +67,7 @@
#include <asm/smp.h>
#include <asm/livepatch.h>
#include <asm/asm-prototypes.h>
#include <asm/hw_irq.h>
#ifdef CONFIG_PPC64
#include <asm/paca.h>
@ -231,7 +232,7 @@ notrace void arch_local_irq_restore(unsigned long en)
/* Write the new soft-enabled value */
set_soft_enabled(en);
if (!en)
if (en == IRQS_DISABLED)
return;
/*
* From this point onward, we can take interrupts, preempt,
@ -276,7 +277,7 @@ notrace void arch_local_irq_restore(unsigned long en)
}
#endif /* CONFIG_TRACE_IRQFLAGS */
set_soft_enabled(0);
set_soft_enabled(IRQS_DISABLED);
trace_hardirqs_off();
/*
@ -288,7 +289,7 @@ notrace void arch_local_irq_restore(unsigned long en)
/* We can soft-enable now */
trace_hardirqs_on();
set_soft_enabled(1);
set_soft_enabled(IRQS_ENABLED);
/*
* And replay if we have to. This will return with interrupts
@ -363,7 +364,7 @@ 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 = IRQS_ENABLED;
/* Tell the caller to enter the low power state */
return true;

3
arch/powerpc/kernel/process.c
View File

@ -57,6 +57,7 @@
#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>
@ -1674,7 +1675,7 @@ 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 = IRQS_ENABLED;
#endif
childregs->gpr[15] = kthread_arg;
p->thread.regs = NULL; /* no user register state */

3
arch/powerpc/kernel/setup_64.c
View File

@ -66,6 +66,7 @@
#include <asm/livepatch.h>
#include <asm/opal.h>
#include <asm/cputhreads.h>
#include <asm/hw_irq.h>
#include "setup.h"
@ -187,6 +188,8 @@ 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 = IRQS_DISABLED;
}
static void __init configure_exceptions(void)

2
arch/powerpc/kernel/time.c
View File

@ -253,7 +253,7 @@ 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 = IRQS_DISABLED;
sst = scan_dispatch_log(acct->starttime_user);
ust = scan_dispatch_log(acct->starttime);

2
arch/powerpc/mm/hugetlbpage.c
View File

@ -752,7 +752,7 @@ 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 = IRQS_ENABLED
*/
pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
bool *is_thp, unsigned *hpage_shift)

2
arch/powerpc/perf/core-book3s.c
View File

@ -322,7 +322,7 @@ 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 == IRQS_DISABLED);
}
/*