aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/asm-offsets.c3
-rw-r--r--arch/powerpc/kernel/crash.c4
-rw-r--r--arch/powerpc/kernel/entry_64.S39
-rw-r--r--arch/powerpc/kernel/head_64.S110
-rw-r--r--arch/powerpc/kernel/idle_power4.S8
-rw-r--r--arch/powerpc/kernel/irq.c24
-rw-r--r--arch/powerpc/kernel/ppc_ksyms.c4
-rw-r--r--arch/powerpc/kernel/setup_64.c4
-rw-r--r--arch/powerpc/platforms/iseries/ksyms.c6
-rw-r--r--arch/powerpc/platforms/iseries/misc.S35
10 files changed, 137 insertions, 100 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index d06f378597b..e96521530d2 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -118,7 +118,8 @@ int main(void)
DEFINE(PACASTABRR, offsetof(struct paca_struct, stab_rr));
DEFINE(PACAR1, offsetof(struct paca_struct, saved_r1));
DEFINE(PACATOC, offsetof(struct paca_struct, kernel_toc));
- DEFINE(PACAPROCENABLED, offsetof(struct paca_struct, proc_enabled));
+ DEFINE(PACASOFTIRQEN, offsetof(struct paca_struct, soft_enabled));
+ DEFINE(PACAHARDIRQEN, offsetof(struct paca_struct, hard_enabled));
DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr));
DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id));
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 1af41f7616d..89b03c8da9d 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -111,7 +111,7 @@ void crash_ipi_callback(struct pt_regs *regs)
if (!cpu_online(cpu))
return;
- local_irq_disable();
+ hard_irq_disable();
if (!cpu_isset(cpu, cpus_in_crash))
crash_save_this_cpu(regs, cpu);
cpu_set(cpu, cpus_in_crash);
@@ -289,7 +289,7 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
* an SMP system.
* The kernel is broken so disable interrupts.
*/
- local_irq_disable();
+ hard_irq_disable();
for_each_irq(irq) {
struct irq_desc *desc = irq_desc + irq;
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 748e74fcf54..efda48741b2 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -87,6 +87,10 @@ system_call_common:
addi r9,r1,STACK_FRAME_OVERHEAD
ld r11,exception_marker@toc(r2)
std r11,-16(r9) /* "regshere" marker */
+ li r10,1
+ stb r10,PACASOFTIRQEN(r13)
+ stb r10,PACAHARDIRQEN(r13)
+ std r10,SOFTE(r1)
#ifdef CONFIG_PPC_ISERIES
BEGIN_FW_FTR_SECTION
/* Hack for handling interrupts when soft-enabling on iSeries */
@@ -94,8 +98,6 @@ BEGIN_FW_FTR_SECTION
andi. r10,r12,MSR_PR /* from kernel */
crand 4*cr0+eq,4*cr1+eq,4*cr0+eq
beq hardware_interrupt_entry
- lbz r10,PACAPROCENABLED(r13)
- std r10,SOFTE(r1)
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
#endif
mfmsr r11
@@ -460,9 +462,9 @@ _GLOBAL(ret_from_except_lite)
#endif
restore:
+ ld r5,SOFTE(r1)
#ifdef CONFIG_PPC_ISERIES
BEGIN_FW_FTR_SECTION
- ld r5,SOFTE(r1)
cmpdi 0,r5,0
beq 4f
/* Check for pending interrupts (iSeries) */
@@ -472,16 +474,16 @@ BEGIN_FW_FTR_SECTION
beq+ 4f /* skip do_IRQ if no interrupts */
li r3,0
- stb r3,PACAPROCENABLED(r13) /* ensure we are soft-disabled */
+ stb r3,PACASOFTIRQEN(r13) /* ensure we are soft-disabled */
ori r10,r10,MSR_EE
mtmsrd r10 /* hard-enable again */
addi r3,r1,STACK_FRAME_OVERHEAD
bl .do_IRQ
b .ret_from_except_lite /* loop back and handle more */
-
-4: stb r5,PACAPROCENABLED(r13)
+4:
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
#endif
+ stb r5,PACASOFTIRQEN(r13)
ld r3,_MSR(r1)
andi. r0,r3,MSR_RI
@@ -538,25 +540,15 @@ do_work:
/* Check that preempt_count() == 0 and interrupts are enabled */
lwz r8,TI_PREEMPT(r9)
cmpwi cr1,r8,0
-#ifdef CONFIG_PPC_ISERIES
-BEGIN_FW_FTR_SECTION
ld r0,SOFTE(r1)
cmpdi r0,0
-END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
-#endif
-BEGIN_FW_FTR_SECTION
- andi. r0,r3,MSR_EE
-END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES)
crandc eq,cr1*4+eq,eq
bne restore
/* here we are preempting the current task */
1:
-#ifdef CONFIG_PPC_ISERIES
-BEGIN_FW_FTR_SECTION
li r0,1
- stb r0,PACAPROCENABLED(r13)
-END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
-#endif
+ stb r0,PACASOFTIRQEN(r13)
+ stb r0,PACAHARDIRQEN(r13)
ori r10,r10,MSR_EE
mtmsrd r10,1 /* reenable interrupts */
bl .preempt_schedule
@@ -639,8 +631,7 @@ _GLOBAL(enter_rtas)
/* There is no way it is acceptable to get here with interrupts enabled,
* check it with the asm equivalent of WARN_ON
*/
- mfmsr r6
- andi. r0,r6,MSR_EE
+ lbz r0,PACASOFTIRQEN(r13)
1: tdnei r0,0
.section __bug_table,"a"
.llong 1b,__LINE__ + 0x1000000, 1f, 2f
@@ -649,7 +640,13 @@ _GLOBAL(enter_rtas)
1: .asciz __FILE__
2: .asciz "enter_rtas"
.previous
-
+
+ /* Hard-disable interrupts */
+ mfmsr r6
+ rldicl r7,r6,48,1
+ rotldi r7,r7,16
+ mtmsrd r7,1
+
/* Unfortunately, the stack pointer and the MSR are also clobbered,
* so they are saved in the PACA which allows us to restore
* our original state after RTAS returns.
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 645c7f10fb2..c93d9f35a12 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -35,9 +35,7 @@
#include <asm/thread_info.h>
#include <asm/firmware.h>
-#ifdef CONFIG_PPC_ISERIES
#define DO_SOFT_DISABLE
-#endif
/*
* We layout physical memory as follows:
@@ -308,7 +306,9 @@ exception_marker:
std r9,_LINK(r1); \
mfctr r10; /* save CTR in stackframe */ \
std r10,_CTR(r1); \
+ lbz r10,PACASOFTIRQEN(r13); \
mfspr r11,SPRN_XER; /* save XER in stackframe */ \
+ std r10,SOFTE(r1); \
std r11,_XER(r1); \
li r9,(n)+1; \
std r9,_TRAP(r1); /* set trap number */ \
@@ -343,6 +343,34 @@ label##_pSeries: \
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common)
+#define MASKABLE_EXCEPTION_PSERIES(n, label) \
+ . = n; \
+ .globl label##_pSeries; \
+label##_pSeries: \
+ HMT_MEDIUM; \
+ mtspr SPRN_SPRG1,r13; /* save r13 */ \
+ mfspr r13,SPRN_SPRG3; /* get paca address into r13 */ \
+ std r9,PACA_EXGEN+EX_R9(r13); /* save r9, r10 */ \
+ std r10,PACA_EXGEN+EX_R10(r13); \
+ lbz r10,PACASOFTIRQEN(r13); \
+ mfcr r9; \
+ cmpwi r10,0; \
+ beq masked_interrupt; \
+ mfspr r10,SPRN_SPRG1; \
+ std r10,PACA_EXGEN+EX_R13(r13); \
+ std r11,PACA_EXGEN+EX_R11(r13); \
+ std r12,PACA_EXGEN+EX_R12(r13); \
+ clrrdi r12,r13,32; /* get high part of &label */ \
+ mfmsr r10; \
+ mfspr r11,SPRN_SRR0; /* save SRR0 */ \
+ LOAD_HANDLER(r12,label##_common) \
+ ori r10,r10,MSR_IR|MSR_DR|MSR_RI; \
+ mtspr SPRN_SRR0,r12; \
+ mfspr r12,SPRN_SRR1; /* and SRR1 */ \
+ mtspr SPRN_SRR1,r10; \
+ rfid; \
+ b . /* prevent speculative execution */
+
#define STD_EXCEPTION_ISERIES(n, label, area) \
.globl label##_iSeries; \
label##_iSeries: \
@@ -358,40 +386,32 @@ label##_iSeries: \
HMT_MEDIUM; \
mtspr SPRN_SPRG1,r13; /* save r13 */ \
EXCEPTION_PROLOG_ISERIES_1(PACA_EXGEN); \
- lbz r10,PACAPROCENABLED(r13); \
+ lbz r10,PACASOFTIRQEN(r13); \
cmpwi 0,r10,0; \
beq- label##_iSeries_masked; \
EXCEPTION_PROLOG_ISERIES_2; \
b label##_common; \
-#ifdef DO_SOFT_DISABLE
+#ifdef CONFIG_PPC_ISERIES
#define DISABLE_INTS \
-BEGIN_FW_FTR_SECTION; \
- lbz r10,PACAPROCENABLED(r13); \
li r11,0; \
- std r10,SOFTE(r1); \
+ stb r11,PACASOFTIRQEN(r13); \
+BEGIN_FW_FTR_SECTION; \
+ stb r11,PACAHARDIRQEN(r13); \
+END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES); \
+BEGIN_FW_FTR_SECTION; \
mfmsr r10; \
- stb r11,PACAPROCENABLED(r13); \
ori r10,r10,MSR_EE; \
mtmsrd r10,1; \
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
-#define ENABLE_INTS \
-BEGIN_FW_FTR_SECTION; \
- lbz r10,PACAPROCENABLED(r13); \
- mfmsr r11; \
- std r10,SOFTE(r1); \
- ori r11,r11,MSR_EE; \
-END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES); \
-BEGIN_FW_FTR_SECTION; \
- ld r12,_MSR(r1); \
- mfmsr r11; \
- rlwimi r11,r12,0,MSR_EE; \
-END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES); \
- mtmsrd r11,1
+#else
+#define DISABLE_INTS \
+ li r11,0; \
+ stb r11,PACASOFTIRQEN(r13); \
+ stb r11,PACAHARDIRQEN(r13)
-#else /* hard enable/disable interrupts */
-#define DISABLE_INTS
+#endif /* CONFIG_PPC_ISERIES */
#define ENABLE_INTS \
ld r12,_MSR(r1); \
@@ -399,8 +419,6 @@ END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES); \
rlwimi r11,r12,0,MSR_EE; \
mtmsrd r11,1
-#endif
-
#define STD_EXCEPTION_COMMON(trap, label, hdlr) \
.align 7; \
.globl label##_common; \
@@ -541,11 +559,11 @@ instruction_access_slb_pSeries:
mfspr r12,SPRN_SRR1 /* and SRR1 */
b .slb_miss_realmode /* Rel. branch works in real mode */
- STD_EXCEPTION_PSERIES(0x500, hardware_interrupt)
+ MASKABLE_EXCEPTION_PSERIES(0x500, hardware_interrupt)
STD_EXCEPTION_PSERIES(0x600, alignment)
STD_EXCEPTION_PSERIES(0x700, program_check)
STD_EXCEPTION_PSERIES(0x800, fp_unavailable)
- STD_EXCEPTION_PSERIES(0x900, decrementer)
+ MASKABLE_EXCEPTION_PSERIES(0x900, decrementer)
STD_EXCEPTION_PSERIES(0xa00, trap_0a)
STD_EXCEPTION_PSERIES(0xb00, trap_0b)
@@ -597,7 +615,24 @@ system_call_pSeries:
/*** pSeries interrupt support ***/
/* moved from 0xf00 */
- STD_EXCEPTION_PSERIES(., performance_monitor)
+ MASKABLE_EXCEPTION_PSERIES(., performance_monitor)
+
+/*
+ * An interrupt came in while soft-disabled; clear EE in SRR1,
+ * clear paca->hard_enabled and return.
+ */
+masked_interrupt:
+ stb r10,PACAHARDIRQEN(r13)
+ mtcrf 0x80,r9
+ ld r9,PACA_EXGEN+EX_R9(r13)
+ mfspr r10,SPRN_SRR1
+ rldicl r10,r10,48,1 /* clear MSR_EE */
+ rotldi r10,r10,16
+ mtspr SPRN_SRR1,r10
+ ld r10,PACA_EXGEN+EX_R10(r13)
+ mfspr r13,SPRN_SPRG1
+ rfid
+ b .
.align 7
_GLOBAL(do_stab_bolted_pSeries)
@@ -952,7 +987,8 @@ fast_exception_return:
REST_8GPRS(2, r1)
mfmsr r10
- clrrdi r10,r10,2 /* clear RI (LE is 0 already) */
+ rldicl r10,r10,48,1 /* clear EE */
+ rldicr r10,r10,16,61 /* clear RI (LE is 0 already) */
mtmsrd r10,1
mtspr SPRN_SRR1,r12
@@ -1877,11 +1913,16 @@ _GLOBAL(__secondary_start)
/* enable MMU and jump to start_secondary */
LOAD_REG_ADDR(r3, .start_secondary_prolog)
LOAD_REG_IMMEDIATE(r4, MSR_KERNEL)
-#ifdef DO_SOFT_DISABLE
+#ifdef CONFIG_PPC_ISERIES
BEGIN_FW_FTR_SECTION
ori r4,r4,MSR_EE
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
#endif
+BEGIN_FW_FTR_SECTION
+ stb r7,PACASOFTIRQEN(r13)
+ stb r7,PACAHARDIRQEN(r13)
+END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES)
+
mtspr SPRN_SRR0,r3
mtspr SPRN_SRR1,r4
rfid
@@ -2019,15 +2060,18 @@ _STATIC(start_here_common)
/* Load up the kernel context */
5:
-#ifdef DO_SOFT_DISABLE
-BEGIN_FW_FTR_SECTION
li r5,0
- stb r5,PACAPROCENABLED(r13) /* Soft Disabled */
+ stb r5,PACASOFTIRQEN(r13) /* Soft Disabled */
+#ifdef CONFIG_PPC_ISERIES
+BEGIN_FW_FTR_SECTION
mfmsr r5
ori r5,r5,MSR_EE /* Hard Enabled */
mtmsrd r5
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
#endif
+BEGIN_FW_FTR_SECTION
+ stb r5,PACAHARDIRQEN(r13)
+END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES)
bl .start_kernel
diff --git a/arch/powerpc/kernel/idle_power4.S b/arch/powerpc/kernel/idle_power4.S
index 30de81da7b4..ba319547860 100644
--- a/arch/powerpc/kernel/idle_power4.S
+++ b/arch/powerpc/kernel/idle_power4.S
@@ -30,6 +30,13 @@ END_FTR_SECTION_IFCLR(CPU_FTR_CAN_NAP)
beqlr
/* Go to NAP now */
+ mfmsr r7
+ rldicl r0,r7,48,1
+ rotldi r0,r0,16
+ mtmsrd r0,1 /* hard-disable interrupts */
+ li r0,1
+ stb r0,PACASOFTIRQEN(r13) /* we'll hard-enable shortly */
+ stb r0,PACAHARDIRQEN(r13)
BEGIN_FTR_SECTION
DSSALL
sync
@@ -38,7 +45,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
ld r8,TI_LOCAL_FLAGS(r9) /* set napping bit */
ori r8,r8,_TLF_NAPPING /* so when we take an exception */
std r8,TI_LOCAL_FLAGS(r9) /* it will return to our caller */
- mfmsr r7
ori r7,r7,MSR_EE
oris r7,r7,MSR_POW@h
1: sync
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 5e37bf14ef2..67b21a008f6 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -64,8 +64,9 @@
#include <asm/ptrace.h>
#include <asm/machdep.h>
#include <asm/udbg.h>
-#ifdef CONFIG_PPC_ISERIES
+#ifdef CONFIG_PPC64
#include <asm/paca.h>
+#include <asm/firmware.h>
#endif
int __irq_offset_value;
@@ -95,6 +96,27 @@ extern atomic_t ipi_sent;
EXPORT_SYMBOL(irq_desc);
int distribute_irqs = 1;
+
+void local_irq_restore(unsigned long en)
+{
+ get_paca()->soft_enabled = en;
+ if (!en)
+ return;
+
+ if (firmware_has_feature(FW_FEATURE_ISERIES)) {
+ if (get_paca()->lppaca_ptr->int_dword.any_int)
+ iseries_handle_interrupts();
+ return;
+ }
+
+ if (get_paca()->hard_enabled)
+ return;
+ /* need to hard-enable interrupts here */
+ get_paca()->hard_enabled = en;
+ if ((int)mfspr(SPRN_DEC) < 0)
+ mtspr(SPRN_DEC, 1);
+ hard_irq_enable();
+}
#endif /* CONFIG_PPC64 */
int show_interrupts(struct seq_file *p, void *v)
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 807193a3c78..9179f0739ea 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -49,6 +49,10 @@
#include <asm/commproc.h>
#endif
+#ifdef CONFIG_PPC64
+EXPORT_SYMBOL(local_irq_restore);
+#endif
+
#ifdef CONFIG_PPC32
extern void transfer_to_handler(void);
extern void do_IRQ(struct pt_regs *regs);
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 4b2e32eab9d..b1b0cda3f74 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -223,8 +223,8 @@ void early_setup_secondary(void)
{
struct paca_struct *lpaca = get_paca();
- /* Mark enabled in PACA */
- lpaca->proc_enabled = 0;
+ /* Mark interrupts enabled in PACA */
+ lpaca->soft_enabled = 0;
/* Initialize hash table for that CPU */
htab_initialize_secondary();
diff --git a/arch/powerpc/platforms/iseries/ksyms.c b/arch/powerpc/platforms/iseries/ksyms.c
index a2200842f4e..2430848b98e 100644
--- a/arch/powerpc/platforms/iseries/ksyms.c
+++ b/arch/powerpc/platforms/iseries/ksyms.c
@@ -19,9 +19,3 @@ EXPORT_SYMBOL(HvCall4);
EXPORT_SYMBOL(HvCall5);
EXPORT_SYMBOL(HvCall6);
EXPORT_SYMBOL(HvCall7);
-
-#ifdef CONFIG_SMP
-EXPORT_SYMBOL(local_get_flags);
-EXPORT_SYMBOL(local_irq_disable);
-EXPORT_SYMBOL(local_irq_restore);
-#endif
diff --git a/arch/powerpc/platforms/iseries/misc.S b/arch/powerpc/platforms/iseries/misc.S
index 7641fc7e550..2c6ff0fdac9 100644
--- a/arch/powerpc/platforms/iseries/misc.S
+++ b/arch/powerpc/platforms/iseries/misc.S
@@ -19,39 +19,8 @@
.text
-/* unsigned long local_save_flags(void) */
-_GLOBAL(local_get_flags)
- lbz r3,PACAPROCENABLED(r13)
- blr
-
-/* unsigned long local_irq_disable(void) */
-_GLOBAL(local_irq_disable)
- lbz r3,PACAPROCENABLED(r13)
- li r4,0
- stb r4,PACAPROCENABLED(r13)
- blr /* Done */
-
-/* void local_irq_restore(unsigned long flags) */
-_GLOBAL(local_irq_restore)
- lbz r5,PACAPROCENABLED(r13)
- /* Check if things are setup the way we want _already_. */
- cmpw 0,r3,r5
- beqlr
- /* are we enabling interrupts? */
- cmpdi 0,r3,0
- stb r3,PACAPROCENABLED(r13)
- beqlr
- /* Check pending interrupts */
- /* A decrementer, IPI or PMC interrupt may have occurred
- * while we were in the hypervisor (which enables) */
- ld r4,PACALPPACAPTR(r13)
- ld r4,LPPACAANYINT(r4)
- cmpdi r4,0
- beqlr
-
- /*
- * Handle pending interrupts in interrupt context
- */
+/* Handle pending interrupts in interrupt context */
+_GLOBAL(iseries_handle_interrupts)
li r0,0x5555
sc
blr
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 09:50:11 +0000