aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/Kconfig2
-rw-r--r--arch/s390/appldata/appldata_mem.c2
-rw-r--r--arch/s390/include/asm/delay.h8
-rw-r--r--arch/s390/include/asm/irq.h8
-rw-r--r--arch/s390/include/asm/s390_ext.h17
-rw-r--r--arch/s390/include/asm/topology.h4
-rw-r--r--arch/s390/include/asm/uaccess.h11
-rw-r--r--arch/s390/kernel/Makefile8
-rw-r--r--arch/s390/kernel/dis.c2
-rw-r--r--arch/s390/kernel/irq.c137
-rw-r--r--arch/s390/kernel/s390_ext.c108
-rw-r--r--arch/s390/kernel/smp.c1
-rw-r--r--arch/s390/kernel/time.c1
-rw-r--r--arch/s390/kernel/topology.c1
-rw-r--r--arch/s390/kernel/traps.c1
-rw-r--r--arch/s390/kernel/vtime.c2
-rw-r--r--arch/s390/lib/delay.c15
-rw-r--r--arch/s390/mm/fault.c62
-rw-r--r--arch/s390/mm/init.c2
-rw-r--r--arch/s390/oprofile/hwsampler.c4
20 files changed, 213 insertions, 183 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index ff2d2371b2e..9fab2aa9c2c 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -2,7 +2,7 @@ config MMU
def_bool y
config ZONE_DMA
- def_bool y if 64BIT
+ def_bool y
config LOCKDEP_SUPPORT
def_bool y
diff --git a/arch/s390/appldata/appldata_mem.c b/arch/s390/appldata/appldata_mem.c
index e43fe753703..f7d3dc555bd 100644
--- a/arch/s390/appldata/appldata_mem.c
+++ b/arch/s390/appldata/appldata_mem.c
@@ -92,9 +92,7 @@ static void appldata_get_mem_data(void *data)
mem_data->pswpin = ev[PSWPIN];
mem_data->pswpout = ev[PSWPOUT];
mem_data->pgalloc = ev[PGALLOC_NORMAL];
-#ifdef CONFIG_ZONE_DMA
mem_data->pgalloc += ev[PGALLOC_DMA];
-#endif
mem_data->pgfault = ev[PGFAULT];
mem_data->pgmajfault = ev[PGMAJFAULT];
diff --git a/arch/s390/include/asm/delay.h b/arch/s390/include/asm/delay.h
index 8a096b83f51..0e3b35f96be 100644
--- a/arch/s390/include/asm/delay.h
+++ b/arch/s390/include/asm/delay.h
@@ -14,10 +14,12 @@
#ifndef _S390_DELAY_H
#define _S390_DELAY_H
-extern void __udelay(unsigned long long usecs);
-extern void udelay_simple(unsigned long long usecs);
-extern void __delay(unsigned long loops);
+void __ndelay(unsigned long long nsecs);
+void __udelay(unsigned long long usecs);
+void udelay_simple(unsigned long long usecs);
+void __delay(unsigned long loops);
+#define ndelay(n) __ndelay((unsigned long long) (n))
#define udelay(n) __udelay((unsigned long long) (n))
#define mdelay(n) __udelay((unsigned long long) (n) * 1000)
diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index 1544b90bd6d..ba7b01c726a 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -2,6 +2,7 @@
#define _ASM_IRQ_H
#include <linux/hardirq.h>
+#include <linux/types.h>
enum interruption_class {
EXTERNAL_INTERRUPT,
@@ -31,4 +32,11 @@ enum interruption_class {
NR_IRQS,
};
+typedef void (*ext_int_handler_t)(unsigned int, unsigned int, unsigned long);
+
+int register_external_interrupt(u16 code, ext_int_handler_t handler);
+int unregister_external_interrupt(u16 code, ext_int_handler_t handler);
+void service_subclass_irq_register(void);
+void service_subclass_irq_unregister(void);
+
#endif /* _ASM_IRQ_H */
diff --git a/arch/s390/include/asm/s390_ext.h b/arch/s390/include/asm/s390_ext.h
deleted file mode 100644
index 080876d5f19..00000000000
--- a/arch/s390/include/asm/s390_ext.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright IBM Corp. 1999,2010
- * Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
- * Martin Schwidefsky <schwidefsky@de.ibm.com>,
- */
-
-#ifndef _S390_EXTINT_H
-#define _S390_EXTINT_H
-
-#include <linux/types.h>
-
-typedef void (*ext_int_handler_t)(unsigned int, unsigned int, unsigned long);
-
-int register_external_interrupt(__u16 code, ext_int_handler_t handler);
-int unregister_external_interrupt(__u16 code, ext_int_handler_t handler);
-
-#endif /* _S390_EXTINT_H */
diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h
index c5338834ddb..005d77d8ae2 100644
--- a/arch/s390/include/asm/topology.h
+++ b/arch/s390/include/asm/topology.h
@@ -7,7 +7,7 @@
extern unsigned char cpu_core_id[NR_CPUS];
extern cpumask_t cpu_core_map[NR_CPUS];
-static inline const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
+static inline const struct cpumask *cpu_coregroup_mask(int cpu)
{
return &cpu_core_map[cpu];
}
@@ -21,7 +21,7 @@ static inline const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
extern unsigned char cpu_book_id[NR_CPUS];
extern cpumask_t cpu_book_map[NR_CPUS];
-static inline const struct cpumask *cpu_book_mask(unsigned int cpu)
+static inline const struct cpumask *cpu_book_mask(int cpu)
{
return &cpu_book_map[cpu];
}
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index 2d9ea11f919..2b23885e81e 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -49,12 +49,13 @@
#define segment_eq(a,b) ((a).ar4 == (b).ar4)
+#define __access_ok(addr, size) \
+({ \
+ __chk_user_ptr(addr); \
+ 1; \
+})
-static inline int __access_ok(const void __user *addr, unsigned long size)
-{
- return 1;
-}
-#define access_ok(type,addr,size) __access_ok(addr,size)
+#define access_ok(type, addr, size) __access_ok(addr, size)
/*
* The exception table consists of pairs of addresses: the first is the
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 5ff15dacb57..df3732249ba 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -20,10 +20,10 @@ CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w
-obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o \
- processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
- s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o \
- vdso.o vtime.o sysinfo.o nmi.o sclp.o jump_label.o
+obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o vtime.o \
+ processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o \
+ debug.o irq.o ipl.o dis.o diag.o mem_detect.o sclp.o vdso.o \
+ sysinfo.o jump_label.o
obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o)
obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index 3d4a78fc1ad..1ca3d1d6a86 100644
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -30,9 +30,9 @@
#include <asm/atomic.h>
#include <asm/mathemu.h>
#include <asm/cpcmd.h>
-#include <asm/s390_ext.h>
#include <asm/lowcore.h>
#include <asm/debug.h>
+#include <asm/irq.h>
#ifndef CONFIG_64BIT
#define ONELONG "%08lx: "
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index e204f9597aa..e3264f6a972 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -1,19 +1,28 @@
/*
- * Copyright IBM Corp. 2004,2010
- * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
- * Thomas Spatzier (tspat@de.ibm.com)
+ * Copyright IBM Corp. 2004,2011
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
+ * Holger Smolinski <Holger.Smolinski@de.ibm.com>,
+ * Thomas Spatzier <tspat@de.ibm.com>,
*
* This file contains interrupt related functions.
*/
-#include <linux/module.h>
-#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <linux/seq_file.h>
-#include <linux/cpu.h>
#include <linux/proc_fs.h>
#include <linux/profile.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ftrace.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/cpu.h>
+#include <asm/irq_regs.h>
+#include <asm/cputime.h>
+#include <asm/lowcore.h>
+#include <asm/irq.h>
+#include "entry.h"
struct irq_class {
char *name;
@@ -82,8 +91,7 @@ int show_interrupts(struct seq_file *p, void *v)
* For compatibilty only. S/390 specific setup of interrupts et al. is done
* much later in init_channel_subsystem().
*/
-void __init
-init_IRQ(void)
+void __init init_IRQ(void)
{
/* nothing... */
}
@@ -134,3 +142,116 @@ void init_irq_proc(void)
create_prof_cpu_mask(root_irq_dir);
}
#endif
+
+/*
+ * ext_int_hash[index] is the start of the list for all external interrupts
+ * that hash to this index. With the current set of external interrupts
+ * (0x1202 external call, 0x1004 cpu timer, 0x2401 hwc console, 0x4000
+ * iucv and 0x2603 pfault) this is always the first element.
+ */
+
+struct ext_int_info {
+ struct ext_int_info *next;
+ ext_int_handler_t handler;
+ u16 code;
+};
+
+static struct ext_int_info *ext_int_hash[256];
+
+static inline int ext_hash(u16 code)
+{
+ return (code + (code >> 9)) & 0xff;
+}
+
+int register_external_interrupt(u16 code, ext_int_handler_t handler)
+{
+ struct ext_int_info *p;
+ int index;
+
+ p = kmalloc(sizeof(*p), GFP_ATOMIC);
+ if (!p)
+ return -ENOMEM;
+ p->code = code;
+ p->handler = handler;
+ index = ext_hash(code);
+ p->next = ext_int_hash[index];
+ ext_int_hash[index] = p;
+ return 0;
+}
+EXPORT_SYMBOL(register_external_interrupt);
+
+int unregister_external_interrupt(u16 code, ext_int_handler_t handler)
+{
+ struct ext_int_info *p, *q;
+ int index;
+
+ index = ext_hash(code);
+ q = NULL;
+ p = ext_int_hash[index];
+ while (p) {
+ if (p->code == code && p->handler == handler)
+ break;
+ q = p;
+ p = p->next;
+ }
+ if (!p)
+ return -ENOENT;
+ if (q)
+ q->next = p->next;
+ else
+ ext_int_hash[index] = p->next;
+ kfree(p);
+ return 0;
+}
+EXPORT_SYMBOL(unregister_external_interrupt);
+
+void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code,
+ unsigned int param32, unsigned long param64)
+{
+ struct pt_regs *old_regs;
+ unsigned short code;
+ struct ext_int_info *p;
+ int index;
+
+ code = (unsigned short) ext_int_code;
+ old_regs = set_irq_regs(regs);
+ s390_idle_check(regs, S390_lowcore.int_clock,
+ S390_lowcore.async_enter_timer);
+ irq_enter();
+ if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
+ /* Serve timer interrupts first. */
+ clock_comparator_work();
+ kstat_cpu(smp_processor_id()).irqs[EXTERNAL_INTERRUPT]++;
+ if (code != 0x1004)
+ __get_cpu_var(s390_idle).nohz_delay = 1;
+ index = ext_hash(code);
+ for (p = ext_int_hash[index]; p; p = p->next) {
+ if (likely(p->code == code))
+ p->handler(ext_int_code, param32, param64);
+ }
+ irq_exit();
+ set_irq_regs(old_regs);
+}
+
+static DEFINE_SPINLOCK(sc_irq_lock);
+static int sc_irq_refcount;
+
+void service_subclass_irq_register(void)
+{
+ spin_lock(&sc_irq_lock);
+ if (!sc_irq_refcount)
+ ctl_set_bit(0, 9);
+ sc_irq_refcount++;
+ spin_unlock(&sc_irq_lock);
+}
+EXPORT_SYMBOL(service_subclass_irq_register);
+
+void service_subclass_irq_unregister(void)
+{
+ spin_lock(&sc_irq_lock);
+ sc_irq_refcount--;
+ if (!sc_irq_refcount)
+ ctl_clear_bit(0, 9);
+ spin_unlock(&sc_irq_lock);
+}
+EXPORT_SYMBOL(service_subclass_irq_unregister);
diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c
deleted file mode 100644
index 185029919c4..00000000000
--- a/arch/s390/kernel/s390_ext.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * Copyright IBM Corp. 1999,2010
- * Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
- * Martin Schwidefsky <schwidefsky@de.ibm.com>,
- */
-
-#include <linux/kernel_stat.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/ftrace.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <asm/s390_ext.h>
-#include <asm/irq_regs.h>
-#include <asm/cputime.h>
-#include <asm/lowcore.h>
-#include <asm/irq.h>
-#include "entry.h"
-
-struct ext_int_info {
- struct ext_int_info *next;
- ext_int_handler_t handler;
- __u16 code;
-};
-
-/*
- * ext_int_hash[index] is the start of the list for all external interrupts
- * that hash to this index. With the current set of external interrupts
- * (0x1202 external call, 0x1004 cpu timer, 0x2401 hwc console, 0x4000
- * iucv and 0x2603 pfault) this is always the first element.
- */
-static struct ext_int_info *ext_int_hash[256];
-
-static inline int ext_hash(__u16 code)
-{
- return (code + (code >> 9)) & 0xff;
-}
-
-int register_external_interrupt(__u16 code, ext_int_handler_t handler)
-{
- struct ext_int_info *p;
- int index;
-
- p = kmalloc(sizeof(*p), GFP_ATOMIC);
- if (!p)
- return -ENOMEM;
- p->code = code;
- p->handler = handler;
- index = ext_hash(code);
- p->next = ext_int_hash[index];
- ext_int_hash[index] = p;
- return 0;
-}
-EXPORT_SYMBOL(register_external_interrupt);
-
-int unregister_external_interrupt(__u16 code, ext_int_handler_t handler)
-{
- struct ext_int_info *p, *q;
- int index;
-
- index = ext_hash(code);
- q = NULL;
- p = ext_int_hash[index];
- while (p) {
- if (p->code == code && p->handler == handler)
- break;
- q = p;
- p = p->next;
- }
- if (!p)
- return -ENOENT;
- if (q)
- q->next = p->next;
- else
- ext_int_hash[index] = p->next;
- kfree(p);
- return 0;
-}
-EXPORT_SYMBOL(unregister_external_interrupt);
-
-void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code,
- unsigned int param32, unsigned long param64)
-{
- struct pt_regs *old_regs;
- unsigned short code;
- struct ext_int_info *p;
- int index;
-
- code = (unsigned short) ext_int_code;
- old_regs = set_irq_regs(regs);
- s390_idle_check(regs, S390_lowcore.int_clock,
- S390_lowcore.async_enter_timer);
- irq_enter();
- if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
- /* Serve timer interrupts first. */
- clock_comparator_work();
- kstat_cpu(smp_processor_id()).irqs[EXTERNAL_INTERRUPT]++;
- if (code != 0x1004)
- __get_cpu_var(s390_idle).nohz_delay = 1;
- index = ext_hash(code);
- for (p = ext_int_hash[index]; p; p = p->next) {
- if (likely(p->code == code))
- p->handler(ext_int_code, param32, param64);
- }
- irq_exit();
- set_irq_regs(old_regs);
-}
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index f8e85ecbc45..52420d2785b 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -44,7 +44,6 @@
#include <asm/sigp.h>
#include <asm/pgalloc.h>
#include <asm/irq.h>
-#include <asm/s390_ext.h>
#include <asm/cpcmd.h>
#include <asm/tlbflush.h>
#include <asm/timer.h>
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index a59557f1fb5..dff933065ab 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -41,7 +41,6 @@
#include <linux/kprobes.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
-#include <asm/s390_ext.h>
#include <asm/div64.h>
#include <asm/vdso.h>
#include <asm/irq.h>
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 2eafb8c7a74..0cd340b7263 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -17,7 +17,6 @@
#include <linux/smp.h>
#include <linux/cpuset.h>
#include <asm/delay.h>
-#include <asm/s390_ext.h>
#define PTF_HORIZONTAL (0UL)
#define PTF_VERTICAL (1UL)
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index b5a4a739b47..a65d2e82f61 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -39,7 +39,6 @@
#include <asm/atomic.h>
#include <asm/mathemu.h>
#include <asm/cpcmd.h>
-#include <asm/s390_ext.h>
#include <asm/lowcore.h>
#include <asm/debug.h>
#include "entry.h"
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 5e8ead4b4ab..2d6228f60cd 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -22,10 +22,10 @@
#include <linux/cpu.h>
#include <linux/kprobes.h>
-#include <asm/s390_ext.h>
#include <asm/timer.h>
#include <asm/irq_regs.h>
#include <asm/cputime.h>
+#include <asm/irq.h>
static DEFINE_PER_CPU(struct vtimer_queue, virt_cpu_timer);
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c
index 0f53110e1d0..a65229d91c9 100644
--- a/arch/s390/lib/delay.c
+++ b/arch/s390/lib/delay.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/irqflags.h>
#include <linux/interrupt.h>
+#include <asm/div64.h>
void __delay(unsigned long loops)
{
@@ -116,3 +117,17 @@ void udelay_simple(unsigned long long usecs)
while (get_clock() < end)
cpu_relax();
}
+
+void __ndelay(unsigned long long nsecs)
+{
+ u64 end;
+
+ nsecs <<= 9;
+ do_div(nsecs, 125);
+ end = get_clock() + nsecs;
+ if (nsecs & ~0xfffUL)
+ __udelay(nsecs >> 12);
+ while (get_clock() < end)
+ barrier();
+}
+EXPORT_SYMBOL(__ndelay);
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index a0f9e730f26..fe103e891e7 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -34,7 +34,7 @@
#include <asm/asm-offsets.h>
#include <asm/system.h>
#include <asm/pgtable.h>
-#include <asm/s390_ext.h>
+#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/compat.h>
#include "../kernel/entry.h"
@@ -245,9 +245,12 @@ static noinline void do_fault_error(struct pt_regs *regs, long int_code,
do_no_context(regs, int_code, trans_exc_code);
break;
default: /* fault & VM_FAULT_ERROR */
- if (fault & VM_FAULT_OOM)
- pagefault_out_of_memory();
- else if (fault & VM_FAULT_SIGBUS) {
+ if (fault & VM_FAULT_OOM) {
+ if (!(regs->psw.mask & PSW_MASK_PSTATE))
+ do_no_context(regs, int_code, trans_exc_code);
+ else
+ pagefault_out_of_memory();
+ } else if (fault & VM_FAULT_SIGBUS) {
/* Kernel mode? Handle exceptions or die */
if (!(regs->psw.mask & PSW_MASK_PSTATE))
do_no_context(regs, int_code, trans_exc_code);
@@ -277,7 +280,8 @@ static inline int do_exception(struct pt_regs *regs, int access,
struct mm_struct *mm;
struct vm_area_struct *vma;
unsigned long address;
- int fault, write;
+ unsigned int flags;
+ int fault;
if (notify_page_fault(regs))
return 0;
@@ -296,6 +300,10 @@ static inline int do_exception(struct pt_regs *regs, int access,
address = trans_exc_code & __FAIL_ADDR_MASK;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, 0, regs, address);
+ flags = FAULT_FLAG_ALLOW_RETRY;
+ if (access == VM_WRITE || (trans_exc_code & store_indication) == 0x400)
+ flags |= FAULT_FLAG_WRITE;
+retry:
down_read(&mm->mmap_sem);
fault = VM_FAULT_BADMAP;
@@ -325,21 +333,31 @@ static inline int do_exception(struct pt_regs *regs, int access,
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- write = (access == VM_WRITE ||
- (trans_exc_code & store_indication) == 0x400) ?
- FAULT_FLAG_WRITE : 0;
- fault = handle_mm_fault(mm, vma, address, write);
+ fault = handle_mm_fault(mm, vma, address, flags);
if (unlikely(fault & VM_FAULT_ERROR))
goto out_up;
- if (fault & VM_FAULT_MAJOR) {
- tsk->maj_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, 0,
- regs, address);
- } else {
- tsk->min_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, 0,
- regs, address);
+ /*
+ * Major/minor page fault accounting is only done on the
+ * initial attempt. If we go through a retry, it is extremely
+ * likely that the page will be found in page cache at that point.
+ */
+ if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ if (fault & VM_FAULT_MAJOR) {
+ tsk->maj_flt++;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, 0,
+ regs, address);
+ } else {
+ tsk->min_flt++;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, 0,
+ regs, address);
+ }
+ if (fault & VM_FAULT_RETRY) {
+ /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk
+ * of starvation. */
+ flags &= ~FAULT_FLAG_ALLOW_RETRY;
+ goto retry;
+ }
}
/*
* The instruction that caused the program check will
@@ -429,10 +447,9 @@ int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write)
access = write ? VM_WRITE : VM_READ;
fault = do_exception(&regs, access, uaddr | 2);
if (unlikely(fault)) {
- if (fault & VM_FAULT_OOM) {
- pagefault_out_of_memory();
- fault = 0;
- } else if (fault & VM_FAULT_SIGBUS)
+ if (fault & VM_FAULT_OOM)
+ return -EFAULT;
+ else if (fault & VM_FAULT_SIGBUS)
do_sigbus(&regs, pgm_int_code, uaddr);
}
return fault ? -EFAULT : 0;
@@ -485,7 +502,6 @@ int pfault_init(void)
"2:\n"
EX_TABLE(0b,1b)
: "=d" (rc) : "a" (&refbk), "m" (refbk) : "cc");
- __ctl_set_bit(0, 9);
return rc;
}
@@ -500,7 +516,6 @@ void pfault_fini(void)
if (!MACHINE_IS_VM || pfault_disable)
return;
- __ctl_clear_bit(0,9);
asm volatile(
" diag %0,0,0x258\n"
"0:\n"
@@ -615,6 +630,7 @@ static int __init pfault_irq_init(void)
rc = pfault_init() == 0 ? 0 : -EOPNOTSUPP;
if (rc)
goto out_pfault;
+ service_subclass_irq_register();
hotcpu_notifier(pfault_cpu_notify, 0);
return 0;
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index dfefc217169..59b663109d9 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -119,9 +119,7 @@ void __init paging_init(void)
sparse_memory_present_with_active_regions(MAX_NUMNODES);
sparse_init();
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
-#ifdef CONFIG_ZONE_DMA
max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);
-#endif
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
free_area_init_nodes(max_zone_pfns);
fault_init();
diff --git a/arch/s390/oprofile/hwsampler.c b/arch/s390/oprofile/hwsampler.c
index 053caa0fd27..4552ce40c81 100644
--- a/arch/s390/oprofile/hwsampler.c
+++ b/arch/s390/oprofile/hwsampler.c
@@ -19,7 +19,7 @@
#include <linux/oprofile.h>
#include <asm/lowcore.h>
-#include <asm/s390_ext.h>
+#include <asm/irq.h>
#include "hwsampler.h"
@@ -580,7 +580,7 @@ static int hws_cpu_callback(struct notifier_block *nfb,
{
/* We do not have sampler space available for all possible CPUs.
All CPUs should be online when hw sampling is activated. */
- return NOTIFY_BAD;
+ return (hws_state <= HWS_DEALLOCATED) ? NOTIFY_OK : NOTIFY_BAD;
}
static struct notifier_block hws_cpu_notifier = {
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-29 16:13:48 +0000