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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

Browse source 
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Kill bogus TPC/address truncation during 32-bit faults.
  sparc: fixup for sparseirq changes
  sparc64: Validate kernel generated fault addresses on sparc64.
  sparc64: On non-Niagara, need to touch NMI watchdog in NOHZ mode.
  sparc64: Implement NMI watchdog on capable cpus.
  sparc: Probe PMU type and record in sparc_pmu_type.
  sparc64: Move generic PCR support code to seperate file.
This commit is contained in:
Linus Torvalds 2009-02-04 07:54:00 -08:00
commit 024bb9617e
17 changed files with 548 additions and 284 deletions
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2
arch/sparc/include/asm/cpudata_64.h
View file

@ -17,7 +17,7 @@
typedef struct {
/* Dcache line 1 */
unsigned int __softirq_pending; /* must be 1st, see rtrap.S */
unsigned int __pad0;
unsigned int __nmi_count;
unsigned long clock_tick; /* %tick's per second */
unsigned long __pad;
unsigned int __pad1;

4
arch/sparc/include/asm/irq_64.h
View file

@ -66,9 +66,6 @@ extern void virt_irq_free(unsigned int virt_irq);
extern void __init init_IRQ(void);
extern void fixup_irqs(void);
extern int register_perfctr_intr(void (*handler)(struct pt_regs *));
extern void release_perfctr_intr(void (*handler)(struct pt_regs *));
static inline void set_softint(unsigned long bits)
{
__asm__ __volatile__("wr %0, 0x0, %%set_softint"
@ -98,5 +95,6 @@ void __trigger_all_cpu_backtrace(void);
extern void *hardirq_stack[NR_CPUS];
extern void *softirq_stack[NR_CPUS];
#define __ARCH_HAS_DO_SOFTIRQ
#define ARCH_HAS_NMI_WATCHDOG
#endif

2
arch/sparc/include/asm/kdebug_64.h
View file

@ -14,6 +14,8 @@ enum die_val {
DIE_TRAP,
DIE_TRAP_TL1,
DIE_CALL,
DIE_NMI,
DIE_NMIWATCHDOG,
};
#endif

10
arch/sparc/include/asm/nmi.h Normal file
View file

@ -0,0 +1,10 @@
#ifndef __NMI_H
#define __NMI_H
extern int __init nmi_init(void);
extern void perfctr_irq(int irq, struct pt_regs *regs);
extern void nmi_adjust_hz(unsigned int new_hz);
extern int nmi_usable;
#endif /* __NMI_H */

46
arch/sparc/include/asm/pcr.h Normal file
View file

@ -0,0 +1,46 @@
#ifndef __PCR_H
#define __PCR_H
struct pcr_ops {
u64 (*read)(void);
void (*write)(u64);
};
extern const struct pcr_ops *pcr_ops;
extern void deferred_pcr_work_irq(int irq, struct pt_regs *regs);
extern void schedule_deferred_pcr_work(void);
#define PCR_PIC_PRIV 0x00000001 /* PIC access is privileged */
#define PCR_STRACE 0x00000002 /* Trace supervisor events */
#define PCR_UTRACE 0x00000004 /* Trace user events */
#define PCR_N2_HTRACE 0x00000008 /* Trace hypervisor events */
#define PCR_N2_TOE_OV0 0x00000010 /* Trap if PIC 0 overflows */
#define PCR_N2_TOE_OV1 0x00000020 /* Trap if PIC 1 overflows */
#define PCR_N2_MASK0 0x00003fc0
#define PCR_N2_MASK0_SHIFT 6
#define PCR_N2_SL0 0x0003c000
#define PCR_N2_SL0_SHIFT 14
#define PCR_N2_OV0 0x00040000
#define PCR_N2_MASK1 0x07f80000
#define PCR_N2_MASK1_SHIFT 19
#define PCR_N2_SL1 0x78000000
#define PCR_N2_SL1_SHIFT 27
#define PCR_N2_OV1 0x80000000
extern unsigned int picl_shift;
/* In order to commonize as much of the implementation as
* possible, we use PICH as our counter. Mostly this is
* to accomodate Niagara-1 which can only count insn cycles
* in PICH.
*/
static inline u64 picl_value(unsigned int nmi_hz)
{
u32 delta = local_cpu_data().clock_tick / (nmi_hz << picl_shift);
return ((u64)((0 - delta) & 0xffffffff)) << 32;
}
extern u64 pcr_enable;
#endif /* __PCR_H */

1
arch/sparc/include/asm/pil.h
View file

@ -23,6 +23,7 @@
#define PIL_SMP_CTX_NEW_VERSION 4
#define PIL_DEVICE_IRQ 5
#define PIL_SMP_CALL_FUNC_SNGL 6
#define PIL_DEFERRED_PCR_WORK 7
#define PIL_NORMAL_MAX 14
#define PIL_NMI 15

2
arch/sparc/kernel/Makefile
View file

@ -52,6 +52,8 @@ obj-$(CONFIG_SPARC64) += visemul.o
obj-$(CONFIG_SPARC64) += hvapi.o
obj-$(CONFIG_SPARC64) += sstate.o
obj-$(CONFIG_SPARC64) += mdesc.o
obj-$(CONFIG_SPARC64) += pcr.o
obj-$(CONFIG_SPARC64) += nmi.o
# sparc32 do not use GENERIC_HARDIRQS but uses the generic devres implementation
obj-$(CONFIG_SPARC32) += devres.o

33
arch/sparc/kernel/cpu.c
View file

@ -26,6 +26,7 @@ EXPORT_PER_CPU_SYMBOL(__cpu_data);
struct cpu_info {
int psr_vers;
const char *name;
const char *pmu_name;
};
struct fpu_info {
@ -45,6 +46,9 @@ struct manufacturer_info {
#define CPU(ver, _name) \
{ .psr_vers = ver, .name = _name }
#define CPU_PMU(ver, _name, _pmu_name) \
{ .psr_vers = ver, .name = _name, .pmu_name = _pmu_name }
#define FPU(ver, _name) \
{ .fp_vers = ver, .name = _name }
@ -183,10 +187,10 @@ static const struct manufacturer_info __initconst manufacturer_info[] = {
},{
0x17,
.cpu_info = {
CPU(0x10, "TI UltraSparc I (SpitFire)"),
CPU(0x11, "TI UltraSparc II (BlackBird)"),
CPU(0x12, "TI UltraSparc IIi (Sabre)"),
CPU(0x13, "TI UltraSparc IIe (Hummingbird)"),
CPU_PMU(0x10, "TI UltraSparc I (SpitFire)", "ultra12"),
CPU_PMU(0x11, "TI UltraSparc II (BlackBird)", "ultra12"),
CPU_PMU(0x12, "TI UltraSparc IIi (Sabre)", "ultra12"),
CPU_PMU(0x13, "TI UltraSparc IIe (Hummingbird)", "ultra12"),
CPU(-1, NULL)
},
.fpu_info = {
@ -199,7 +203,7 @@ static const struct manufacturer_info __initconst manufacturer_info[] = {
},{
0x22,
.cpu_info = {
CPU(0x10, "TI UltraSparc I (SpitFire)"),
CPU_PMU(0x10, "TI UltraSparc I (SpitFire)", "ultra12"),
CPU(-1, NULL)
},
.fpu_info = {
@ -209,12 +213,12 @@ static const struct manufacturer_info __initconst manufacturer_info[] = {
},{
0x3e,
.cpu_info = {
CPU(0x14, "TI UltraSparc III (Cheetah)"),
CPU(0x15, "TI UltraSparc III+ (Cheetah+)"),
CPU(0x16, "TI UltraSparc IIIi (Jalapeno)"),
CPU(0x18, "TI UltraSparc IV (Jaguar)"),
CPU(0x19, "TI UltraSparc IV+ (Panther)"),
CPU(0x22, "TI UltraSparc IIIi+ (Serrano)"),
CPU_PMU(0x14, "TI UltraSparc III (Cheetah)", "ultra3"),
CPU_PMU(0x15, "TI UltraSparc III+ (Cheetah+)", "ultra3+"),
CPU_PMU(0x16, "TI UltraSparc IIIi (Jalapeno)", "ultra3i"),
CPU_PMU(0x18, "TI UltraSparc IV (Jaguar)", "ultra3+"),
CPU_PMU(0x19, "TI UltraSparc IV+ (Panther)", "ultra4+"),
CPU_PMU(0x22, "TI UltraSparc IIIi+ (Serrano)", "ultra3i"),
CPU(-1, NULL)
},
.fpu_info = {
@ -234,6 +238,7 @@ static const struct manufacturer_info __initconst manufacturer_info[] = {
const char *sparc_cpu_type;
const char *sparc_fpu_type;
const char *sparc_pmu_type;
unsigned int fsr_storage;
@ -244,6 +249,7 @@ static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
sparc_cpu_type = NULL;
sparc_fpu_type = NULL;
sparc_pmu_type = NULL;
manuf = NULL;
for (i = 0; i < ARRAY_SIZE(manufacturer_info); i++)
@ -263,6 +269,7 @@ static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
{
if (cpu->psr_vers == psr_vers) {
sparc_cpu_type = cpu->name;
sparc_pmu_type = cpu->pmu_name;
sparc_fpu_type = "No FPU";
break;
}
@ -290,6 +297,8 @@ static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
psr_impl, fpu_vers);
sparc_fpu_type = "Unknown FPU";
}
if (sparc_pmu_type == NULL)
sparc_pmu_type = "Unknown PMU";
}
#ifdef CONFIG_SPARC32
@ -315,11 +324,13 @@ static void __init sun4v_cpu_probe(void)
case SUN4V_CHIP_NIAGARA1:
sparc_cpu_type = "UltraSparc T1 (Niagara)";
sparc_fpu_type = "UltraSparc T1 integrated FPU";
sparc_pmu_type = "niagara";
break;
case SUN4V_CHIP_NIAGARA2:
sparc_cpu_type = "UltraSparc T2 (Niagara2)";
sparc_fpu_type = "UltraSparc T2 integrated FPU";
sparc_pmu_type = "niagara2";
break;
default:

68
arch/sparc/kernel/irq_64.c
View file

@ -196,6 +196,11 @@ int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n');
skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == NR_IRQS) {
seq_printf(p, "NMI: ");
for_each_online_cpu(j)
seq_printf(p, "%10u ", cpu_data(j).__nmi_count);
seq_printf(p, " Non-maskable interrupts\n");
}
return 0;
}
@ -778,69 +783,6 @@ void do_softirq(void)
local_irq_restore(flags);
}
static void unhandled_perf_irq(struct pt_regs *regs)
{
unsigned long pcr, pic;
read_pcr(pcr);
read_pic(pic);
write_pcr(0);
printk(KERN_EMERG "CPU %d: Got unexpected perf counter IRQ.\n",
smp_processor_id());
printk(KERN_EMERG "CPU %d: PCR[%016lx] PIC[%016lx]\n",
smp_processor_id(), pcr, pic);
}
/* Almost a direct copy of the powerpc PMC code. */
static DEFINE_SPINLOCK(perf_irq_lock);
static void *perf_irq_owner_caller; /* mostly for debugging */
static void (*perf_irq)(struct pt_regs *regs) = unhandled_perf_irq;
/* Invoked from level 15 PIL handler in trap table. */
void perfctr_irq(int irq, struct pt_regs *regs)
{
clear_softint(1 << irq);
perf_irq(regs);
}
int register_perfctr_intr(void (*handler)(struct pt_regs *))
{
int ret;
if (!handler)
return -EINVAL;
spin_lock(&perf_irq_lock);
if (perf_irq != unhandled_perf_irq) {
printk(KERN_WARNING "register_perfctr_intr: "
"perf IRQ busy (reserved by caller %p)\n",
perf_irq_owner_caller);
ret = -EBUSY;
goto out;
}
perf_irq_owner_caller = __builtin_return_address(0);
perf_irq = handler;
ret = 0;
out:
spin_unlock(&perf_irq_lock);
return ret;
}
EXPORT_SYMBOL_GPL(register_perfctr_intr);
void release_perfctr_intr(void (*handler)(struct pt_regs *))
{
spin_lock(&perf_irq_lock);
perf_irq_owner_caller = NULL;
perf_irq = unhandled_perf_irq;
spin_unlock(&perf_irq_lock);
}
EXPORT_SYMBOL_GPL(release_perfctr_intr);
#ifdef CONFIG_HOTPLUG_CPU
void fixup_irqs(void)
{

1
arch/sparc/kernel/kernel.h
View file

@ -5,6 +5,7 @@
/* cpu.c */
extern const char *sparc_cpu_type;
extern const char *sparc_pmu_type;
extern const char *sparc_fpu_type;
extern unsigned int fsr_storage;

224
arch/sparc/kernel/nmi.c Normal file
View file

@ -0,0 +1,224 @@
/* Pseudo NMI support on sparc64 systems.
*
* Copyright (C) 2009 David S. Miller <davem@davemloft.net>
*
* The NMI watchdog support and infrastructure is based almost
* entirely upon the x86 NMI support code.
*/
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/percpu.h>
#include <linux/nmi.h>
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/kernel_stat.h>
#include <linux/slab.h>
#include <linux/kdebug.h>
#include <linux/delay.h>
#include <linux/smp.h>
#include <asm/ptrace.h>
#include <asm/local.h>
#include <asm/pcr.h>
/* We don't have a real NMI on sparc64, but we can fake one
* up using profiling counter overflow interrupts and interrupt
* levels.
*
* The profile overflow interrupts at level 15, so we use
* level 14 as our IRQ off level.
*/
static int nmi_watchdog_active;
static int panic_on_timeout;
int nmi_usable;
EXPORT_SYMBOL_GPL(nmi_usable);
static unsigned int nmi_hz = HZ;
static DEFINE_PER_CPU(unsigned int, last_irq_sum);
static DEFINE_PER_CPU(local_t, alert_counter);
static DEFINE_PER_CPU(int, nmi_touch);
void touch_nmi_watchdog(void)
{
if (nmi_watchdog_active) {
int cpu;
for_each_present_cpu(cpu) {
if (per_cpu(nmi_touch, cpu) != 1)
per_cpu(nmi_touch, cpu) = 1;
}
}
touch_softlockup_watchdog();
}
EXPORT_SYMBOL(touch_nmi_watchdog);
static void die_nmi(const char *str, struct pt_regs *regs, int do_panic)
{
if (notify_die(DIE_NMIWATCHDOG, str, regs, 0,
pt_regs_trap_type(regs), SIGINT) == NOTIFY_STOP)
return;
console_verbose();
bust_spinlocks(1);
printk(KERN_EMERG "%s", str);
printk(" on CPU%d, ip %08lx, registers:\n",
smp_processor_id(), regs->tpc);
show_regs(regs);
bust_spinlocks(0);
if (do_panic || panic_on_oops)
panic("Non maskable interrupt");
local_irq_enable();
do_exit(SIGBUS);
}
notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs)
{
unsigned int sum, touched = 0;
int cpu = smp_processor_id();
clear_softint(1 << irq);
pcr_ops->write(PCR_PIC_PRIV);
local_cpu_data().__nmi_count++;
if (notify_die(DIE_NMI, "nmi", regs, 0,
pt_regs_trap_type(regs), SIGINT) == NOTIFY_STOP)
touched = 1;
sum = kstat_irqs_cpu(0, cpu);
if (__get_cpu_var(nmi_touch)) {
__get_cpu_var(nmi_touch) = 0;
touched = 1;
}
if (!touched && __get_cpu_var(last_irq_sum) == sum) {
local_inc(&__get_cpu_var(alert_counter));
if (local_read(&__get_cpu_var(alert_counter)) == 5 * nmi_hz)
die_nmi("BUG: NMI Watchdog detected LOCKUP",
regs, panic_on_timeout);
} else {
__get_cpu_var(last_irq_sum) = sum;
local_set(&__get_cpu_var(alert_counter), 0);
}
if (nmi_usable) {
write_pic(picl_value(nmi_hz));
pcr_ops->write(pcr_enable);
}
}
static inline unsigned int get_nmi_count(int cpu)
{
return cpu_data(cpu).__nmi_count;
}
static int endflag __initdata;
static __init void nmi_cpu_busy(void *data)
{
local_irq_enable_in_hardirq();
while (endflag == 0)
mb();
}
static void report_broken_nmi(int cpu, int *prev_nmi_count)
{
printk(KERN_CONT "\n");
printk(KERN_WARNING
"WARNING: CPU#%d: NMI appears to be stuck (%d->%d)!\n",
cpu, prev_nmi_count[cpu], get_nmi_count(cpu));
printk(KERN_WARNING
"Please report this to bugzilla.kernel.org,\n");
printk(KERN_WARNING
"and attach the output of the 'dmesg' command.\n");
nmi_usable = 0;
}
static void stop_watchdog(void *unused)
{
pcr_ops->write(PCR_PIC_PRIV);
}
static int __init check_nmi_watchdog(void)
{
unsigned int *prev_nmi_count;
int cpu, err;
prev_nmi_count = kmalloc(nr_cpu_ids * sizeof(unsigned int), GFP_KERNEL);
if (!prev_nmi_count) {
err = -ENOMEM;
goto error;
}
printk(KERN_INFO "Testing NMI watchdog ... ");
smp_call_function(nmi_cpu_busy, (void *)&endflag, 0);
for_each_possible_cpu(cpu)
prev_nmi_count[cpu] = get_nmi_count(cpu);
local_irq_enable();
mdelay((20 * 1000) / nmi_hz); /* wait 20 ticks */
for_each_online_cpu(cpu) {
if (get_nmi_count(cpu) - prev_nmi_count[cpu] <= 5)
report_broken_nmi(cpu, prev_nmi_count);
}
endflag = 1;
if (!nmi_usable) {
kfree(prev_nmi_count);
err = -ENODEV;
goto error;
}
printk("OK.\n");
nmi_hz = 1;
kfree(prev_nmi_count);
return 0;
error:
on_each_cpu(stop_watchdog, NULL, 1);
return err;
}
static void start_watchdog(void *unused)
{
pcr_ops->write(PCR_PIC_PRIV);
write_pic(picl_value(nmi_hz));
pcr_ops->write(pcr_enable);
}
void nmi_adjust_hz(unsigned int new_hz)
{
nmi_hz = new_hz;
on_each_cpu(start_watchdog, NULL, 1);
}
EXPORT_SYMBOL_GPL(nmi_adjust_hz);
int __init nmi_init(void)
{
nmi_usable = 1;
on_each_cpu(start_watchdog, NULL, 1);
return check_nmi_watchdog();
}
static int __init setup_nmi_watchdog(char *str)
{
if (!strncmp(str, "panic", 5))
panic_on_timeout = 1;
return 0;
}
__setup("nmi_watchdog=", setup_nmi_watchdog);

153
arch/sparc/kernel/pcr.c Normal file
View file

@ -0,0 +1,153 @@
/* pcr.c: Generic sparc64 performance counter infrastructure.
*
* Copyright (C) 2009 David S. Miller (davem@davemloft.net)
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/pil.h>
#include <asm/pcr.h>
#include <asm/nmi.h>
/* This code is shared between various users of the performance
* counters. Users will be oprofile, pseudo-NMI watchdog, and the
* perf_counter support layer.
*/
#define PCR_SUN4U_ENABLE (PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE)
#define PCR_N2_ENABLE (PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE | \
PCR_N2_TOE_OV1 | \
(2 << PCR_N2_SL1_SHIFT) | \
(0xff << PCR_N2_MASK1_SHIFT))
u64 pcr_enable;
unsigned int picl_shift;
/* Performance counter interrupts run unmasked at PIL level 15.
* Therefore we can't do things like wakeups and other work
* that expects IRQ disabling to be adhered to in locking etc.
*
* Therefore in such situations we defer the work by signalling
* a lower level cpu IRQ.
*/
void deferred_pcr_work_irq(int irq, struct pt_regs *regs)
{
clear_softint(1 << PIL_DEFERRED_PCR_WORK);
}
void schedule_deferred_pcr_work(void)
{
set_softint(1 << PIL_DEFERRED_PCR_WORK);
}
const struct pcr_ops *pcr_ops;
EXPORT_SYMBOL_GPL(pcr_ops);
static u64 direct_pcr_read(void)
{
u64 val;
read_pcr(val);
return val;
}
static void direct_pcr_write(u64 val)
{
write_pcr(val);
}
static const struct pcr_ops direct_pcr_ops = {
.read = direct_pcr_read,
.write = direct_pcr_write,
};
static void n2_pcr_write(u64 val)
{
unsigned long ret;
ret = sun4v_niagara2_setperf(HV_N2_PERF_SPARC_CTL, val);
if (val != HV_EOK)
write_pcr(val);
}
static const struct pcr_ops n2_pcr_ops = {
.read = direct_pcr_read,
.write = n2_pcr_write,
};
static unsigned long perf_hsvc_group;
static unsigned long perf_hsvc_major;
static unsigned long perf_hsvc_minor;
static int __init register_perf_hsvc(void)
{
if (tlb_type == hypervisor) {
switch (sun4v_chip_type) {
case SUN4V_CHIP_NIAGARA1:
perf_hsvc_group = HV_GRP_NIAG_PERF;
break;
case SUN4V_CHIP_NIAGARA2:
perf_hsvc_group = HV_GRP_N2_CPU;
break;
default:
return -ENODEV;
}
perf_hsvc_major = 1;
perf_hsvc_minor = 0;
if (sun4v_hvapi_register(perf_hsvc_group,
perf_hsvc_major,
&perf_hsvc_minor)) {
printk("perfmon: Could not register hvapi.\n");
return -ENODEV;
}
}
return 0;
}
static void __init unregister_perf_hsvc(void)
{
if (tlb_type != hypervisor)
return;
sun4v_hvapi_unregister(perf_hsvc_group);
}
int __init pcr_arch_init(void)
{
int err = register_perf_hsvc();
if (err)
return err;
switch (tlb_type) {
case hypervisor:
pcr_ops = &n2_pcr_ops;
pcr_enable = PCR_N2_ENABLE;
picl_shift = 2;
break;
case cheetah:
case cheetah_plus:
case spitfire:
pcr_ops = &direct_pcr_ops;
pcr_enable = PCR_SUN4U_ENABLE;
break;
default:
err = -ENODEV;
goto out_unregister;
}
return nmi_init();
out_unregister:
unregister_perf_hsvc();
return err;
}
arch_initcall(pcr_arch_init);

5
arch/sparc/kernel/process_64.c
View file

@ -29,6 +29,7 @@
#include <linux/cpu.h>
#include <linux/elfcore.h>
#include <linux/sysrq.h>
#include <linux/nmi.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@ -52,8 +53,10 @@
static void sparc64_yield(int cpu)
{
if (tlb_type != hypervisor)
if (tlb_type != hypervisor) {
touch_nmi_watchdog();
return;
}
clear_thread_flag(TIF_POLLING_NRFLAG);
smp_mb__after_clear_bit();

2
arch/sparc/kernel/setup_64.c
View file

@ -354,6 +354,7 @@ static int show_cpuinfo(struct seq_file *m, void *__unused)
seq_printf(m,
"cpu\t\t: %s\n"
"fpu\t\t: %s\n"
"pmu\t\t: %s\n"
"prom\t\t: %s\n"
"type\t\t: %s\n"
"ncpus probed\t: %d\n"
@ -366,6 +367,7 @@ static int show_cpuinfo(struct seq_file *m, void *__unused)
,
sparc_cpu_type,
sparc_fpu_type,
sparc_pmu_type,
prom_version,
((tlb_type == hypervisor) ?
"sun4v" :

3
arch/sparc/kernel/ttable.S
View file

@ -63,7 +63,8 @@ tl0_irq6: TRAP_IRQ(smp_call_function_single_client, 6)
#else
tl0_irq6: BTRAP(0x46)
#endif
tl0_irq7: BTRAP(0x47) BTRAP(0x48) BTRAP(0x49)
tl0_irq7: TRAP_IRQ(deferred_pcr_work_irq, 7)
tl0_irq8: BTRAP(0x48) BTRAP(0x49)
tl0_irq10: BTRAP(0x4a) BTRAP(0x4b) BTRAP(0x4c) BTRAP(0x4d)
tl0_irq14: TRAP_IRQ(timer_interrupt, 14)
tl0_irq15: TRAP_NMI_IRQ(perfctr_irq, 15)

44
arch/sparc/mm/fault_64.c
View file

@ -19,6 +19,7 @@
#include <linux/interrupt.h>
#include <linux/kprobes.h>
#include <linux/kdebug.h>
#include <linux/percpu.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@ -224,6 +225,30 @@ cannot_handle:
unhandled_fault (address, current, regs);
}
static void noinline bogus_32bit_fault_tpc(struct pt_regs *regs)
{
static int times;
if (times++ < 10)
printk(KERN_ERR "FAULT[%s:%d]: 32-bit process reports "
"64-bit TPC [%lx]\n",
current->comm, current->pid,
regs->tpc);
show_regs(regs);
}
static void noinline bogus_32bit_fault_address(struct pt_regs *regs,
unsigned long addr)
{
static int times;
if (times++ < 10)
printk(KERN_ERR "FAULT[%s:%d]: 32-bit process "
"reports 64-bit fault address [%lx]\n",
current->comm, current->pid, addr);
show_regs(regs);
}
asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
{
struct mm_struct *mm = current->mm;
@ -244,6 +269,19 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
(fault_code & FAULT_CODE_DTLB))
BUG();
if (test_thread_flag(TIF_32BIT)) {
if (!(regs->tstate & TSTATE_PRIV)) {
if (unlikely((regs->tpc >> 32) != 0)) {
bogus_32bit_fault_tpc(regs);
goto intr_or_no_mm;
}
}
if (unlikely((address >> 32) != 0)) {
bogus_32bit_fault_address(regs, address);
goto intr_or_no_mm;
}
}
if (regs->tstate & TSTATE_PRIV) {
unsigned long tpc = regs->tpc;
@ -264,12 +302,6 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
if (in_atomic() || !mm)
goto intr_or_no_mm;
if (test_thread_flag(TIF_32BIT)) {
if (!(regs->tstate & TSTATE_PRIV))
regs->tpc &= 0xffffffff;
address &= 0xffffffff;
}
if (!down_read_trylock(&mm->mmap_sem)) {
if ((regs->tstate & TSTATE_PRIV) &&
!search_exception_tables(regs->tpc)) {

232
arch/sparc/oprofile/init.c
View file

@ -13,217 +13,57 @@
#include <linux/init.h>
#ifdef CONFIG_SPARC64
#include <asm/hypervisor.h>
#include <asm/spitfire.h>
#include <asm/cpudata.h>
#include <asm/irq.h>
#include <linux/notifier.h>
#include <linux/rcupdate.h>
#include <linux/kdebug.h>
#include <asm/nmi.h>
static int nmi_enabled;
struct pcr_ops {
u64 (*read)(void);
void (*write)(u64);
};
static const struct pcr_ops *pcr_ops;
static u64 direct_pcr_read(void)
static int profile_timer_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data)
{
u64 val;
struct die_args *args = (struct die_args *)data;
int ret = NOTIFY_DONE;
read_pcr(val);
return val;
switch (val) {
case DIE_NMI:
oprofile_add_sample(args->regs, 0);
ret = NOTIFY_STOP;
break;
default:
break;
}
return ret;
}
static void direct_pcr_write(u64 val)
{
write_pcr(val);
}
static const struct pcr_ops direct_pcr_ops = {
.read = direct_pcr_read,
.write = direct_pcr_write,
static struct notifier_block profile_timer_exceptions_nb = {
.notifier_call = profile_timer_exceptions_notify,
};
static void n2_pcr_write(u64 val)
static int timer_start(void)
{
unsigned long ret;
ret = sun4v_niagara2_setperf(HV_N2_PERF_SPARC_CTL, val);
if (val != HV_EOK)
write_pcr(val);
}
static const struct pcr_ops n2_pcr_ops = {
.read = direct_pcr_read,
.write = n2_pcr_write,
};
/* In order to commonize as much of the implementation as
* possible, we use PICH as our counter. Mostly this is
* to accomodate Niagara-1 which can only count insn cycles
* in PICH.
*/
static u64 picl_value(void)
{
u32 delta = local_cpu_data().clock_tick / HZ;
return ((u64)((0 - delta) & 0xffffffff)) << 32;
}
#define PCR_PIC_PRIV 0x00000001 /* PIC access is privileged */
#define PCR_STRACE 0x00000002 /* Trace supervisor events */
#define PCR_UTRACE 0x00000004 /* Trace user events */
#define PCR_N2_HTRACE 0x00000008 /* Trace hypervisor events */
#define PCR_N2_TOE_OV0 0x00000010 /* Trap if PIC 0 overflows */
#define PCR_N2_TOE_OV1 0x00000020 /* Trap if PIC 1 overflows */
#define PCR_N2_MASK0 0x00003fc0
#define PCR_N2_MASK0_SHIFT 6
#define PCR_N2_SL0 0x0003c000
#define PCR_N2_SL0_SHIFT 14
#define PCR_N2_OV0 0x00040000
#define PCR_N2_MASK1 0x07f80000
#define PCR_N2_MASK1_SHIFT 19
#define PCR_N2_SL1 0x78000000
#define PCR_N2_SL1_SHIFT 27
#define PCR_N2_OV1 0x80000000
#define PCR_SUN4U_ENABLE (PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE)
#define PCR_N2_ENABLE (PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE | \
PCR_N2_TOE_OV1 | \
(2 << PCR_N2_SL1_SHIFT) | \
(0xff << PCR_N2_MASK1_SHIFT))
static u64 pcr_enable = PCR_SUN4U_ENABLE;
static void nmi_handler(struct pt_regs *regs)
{
pcr_ops->write(PCR_PIC_PRIV);
if (nmi_enabled) {
oprofile_add_sample(regs, 0);
write_pic(picl_value());
pcr_ops->write(pcr_enable);
}
}
/* We count "clock cycle" events in the lower 32-bit PIC.
* Then configure it such that it overflows every HZ, and thus
* generates a level 15 interrupt at that frequency.
*/
static void cpu_nmi_start(void *_unused)
{
pcr_ops->write(PCR_PIC_PRIV);
write_pic(picl_value());
pcr_ops->write(pcr_enable);
}
static void cpu_nmi_stop(void *_unused)
{
pcr_ops->write(PCR_PIC_PRIV);
}
static int nmi_start(void)
{
int err = register_perfctr_intr(nmi_handler);
if (!err) {
nmi_enabled = 1;
wmb();
err = on_each_cpu(cpu_nmi_start, NULL, 1);
if (err) {
nmi_enabled = 0;
wmb();
on_each_cpu(cpu_nmi_stop, NULL, 1);
release_perfctr_intr(nmi_handler);
}
}
return err;
}
static void nmi_stop(void)
{
nmi_enabled = 0;
wmb();
on_each_cpu(cpu_nmi_stop, NULL, 1);
release_perfctr_intr(nmi_handler);
synchronize_sched();
}
static unsigned long perf_hsvc_group;
static unsigned long perf_hsvc_major;
static unsigned long perf_hsvc_minor;
static int __init register_perf_hsvc(void)
{
if (tlb_type == hypervisor) {
switch (sun4v_chip_type) {
case SUN4V_CHIP_NIAGARA1:
perf_hsvc_group = HV_GRP_NIAG_PERF;
break;
case SUN4V_CHIP_NIAGARA2:
perf_hsvc_group = HV_GRP_N2_CPU;
break;
default:
return -ENODEV;
}
perf_hsvc_major = 1;
perf_hsvc_minor = 0;
if (sun4v_hvapi_register(perf_hsvc_group,
perf_hsvc_major,
&perf_hsvc_minor)) {
printk("perfmon: Could not register N2 hvapi.\n");
return -ENODEV;
}
}
if (register_die_notifier(&profile_timer_exceptions_nb))
return 1;
nmi_adjust_hz(HZ);
return 0;
}
static void unregister_perf_hsvc(void)
static void timer_stop(void)
{
if (tlb_type != hypervisor)
return;
sun4v_hvapi_unregister(perf_hsvc_group);
nmi_adjust_hz(1);
unregister_die_notifier(&profile_timer_exceptions_nb);
synchronize_sched(); /* Allow already-started NMIs to complete. */
}
static int oprofile_nmi_init(struct oprofile_operations *ops)
static int op_nmi_timer_init(struct oprofile_operations *ops)
{
int err = register_perf_hsvc();
if (err)
return err;
switch (tlb_type) {
case hypervisor:
pcr_ops = &n2_pcr_ops;
pcr_enable = PCR_N2_ENABLE;
break;
case cheetah:
case cheetah_plus:
pcr_ops = &direct_pcr_ops;
break;
default:
if (!nmi_usable)
return -ENODEV;
}
ops->create_files = NULL;
ops->setup = NULL;
ops->shutdown = NULL;
ops->start = nmi_start;
ops->stop = nmi_stop;
ops->start = timer_start;
ops->stop = timer_stop;
ops->cpu_type = "timer";
printk(KERN_INFO "oprofile: Using perfctr based NMI timer interrupt.\n");
printk(KERN_INFO "oprofile: Using perfctr NMI timer interrupt.\n");
return 0;
}
#endif
@ -233,7 +73,7 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
int ret = -ENODEV;
#ifdef CONFIG_SPARC64
ret = oprofile_nmi_init(ops);
ret = op_nmi_timer_init(ops);
if (!ret)
return ret;
#endif
@ -241,10 +81,6 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
return ret;
}
void oprofile_arch_exit(void)
{
#ifdef CONFIG_SPARC64
unregister_perf_hsvc();
#endif
}