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-rw-r--r--arch/x86/oprofile/Makefile3
-rw-r--r--arch/x86/oprofile/backtrace.c99
-rw-r--r--arch/x86/oprofile/init.c25
-rw-r--r--arch/x86/oprofile/nmi_int.c727
-rw-r--r--arch/x86/oprofile/nmi_timer_int.c69
-rw-r--r--arch/x86/oprofile/op_counter.h3
-rw-r--r--arch/x86/oprofile/op_model_amd.c727
-rw-r--r--arch/x86/oprofile/op_model_p4.c128
-rw-r--r--arch/x86/oprofile/op_model_ppro.c182
-rw-r--r--arch/x86/oprofile/op_x86_model.h78
10 files changed, 1160 insertions, 881 deletions
diff --git a/arch/x86/oprofile/Makefile b/arch/x86/oprofile/Makefile
index 446902b2a6b..1599f568f0e 100644
--- a/arch/x86/oprofile/Makefile
+++ b/arch/x86/oprofile/Makefile
@@ -4,9 +4,8 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
oprof.o cpu_buffer.o buffer_sync.o \
event_buffer.o oprofile_files.o \
oprofilefs.o oprofile_stats.o \
- timer_int.o )
+ timer_int.o nmi_timer_int.o )
oprofile-y := $(DRIVER_OBJS) init.o backtrace.o
oprofile-$(CONFIG_X86_LOCAL_APIC) += nmi_int.o op_model_amd.o \
op_model_ppro.o op_model_p4.o
-oprofile-$(CONFIG_X86_IO_APIC) += nmi_timer_int.o
diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
index 04df67f8a7b..5d04be5efb6 100644
--- a/arch/x86/oprofile/backtrace.c
+++ b/arch/x86/oprofile/backtrace.c
@@ -11,21 +11,12 @@
#include <linux/oprofile.h>
#include <linux/sched.h>
#include <linux/mm.h>
+#include <linux/compat.h>
+#include <linux/uaccess.h>
+
#include <asm/ptrace.h>
-#include <asm/uaccess.h>
#include <asm/stacktrace.h>
-static void backtrace_warning_symbol(void *data, char *msg,
- unsigned long symbol)
-{
- /* Ignore warnings */
-}
-
-static void backtrace_warning(void *data, char *msg)
-{
- /* Ignore warnings */
-}
-
static int backtrace_stack(void *data, char *name)
{
/* Yes, we want all stacks */
@@ -41,50 +32,96 @@ static void backtrace_address(void *data, unsigned long addr, int reliable)
}
static struct stacktrace_ops backtrace_ops = {
- .warning = backtrace_warning,
- .warning_symbol = backtrace_warning_symbol,
- .stack = backtrace_stack,
- .address = backtrace_address,
+ .stack = backtrace_stack,
+ .address = backtrace_address,
+ .walk_stack = print_context_stack,
};
-struct frame_head {
- struct frame_head *bp;
- unsigned long ret;
-} __attribute__((packed));
-
-static struct frame_head *dump_user_backtrace(struct frame_head *head)
+#ifdef CONFIG_COMPAT
+static struct stack_frame_ia32 *
+dump_user_backtrace_32(struct stack_frame_ia32 *head)
{
- struct frame_head bufhead[2];
+ /* Also check accessibility of one struct frame_head beyond: */
+ struct stack_frame_ia32 bufhead[2];
+ struct stack_frame_ia32 *fp;
+ unsigned long bytes;
- /* Also check accessibility of one struct frame_head beyond */
- if (!access_ok(VERIFY_READ, head, sizeof(bufhead)))
+ bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
+ if (bytes != 0)
return NULL;
- if (__copy_from_user_inatomic(bufhead, head, sizeof(bufhead)))
+
+ fp = (struct stack_frame_ia32 *) compat_ptr(bufhead[0].next_frame);
+
+ oprofile_add_trace(bufhead[0].return_address);
+
+ /* frame pointers should strictly progress back up the stack
+ * (towards higher addresses) */
+ if (head >= fp)
return NULL;
- oprofile_add_trace(bufhead[0].ret);
+ return fp;
+}
+
+static inline int
+x86_backtrace_32(struct pt_regs * const regs, unsigned int depth)
+{
+ struct stack_frame_ia32 *head;
+
+ /* User process is IA32 */
+ if (!current || !test_thread_flag(TIF_IA32))
+ return 0;
+
+ head = (struct stack_frame_ia32 *) regs->bp;
+ while (depth-- && head)
+ head = dump_user_backtrace_32(head);
+
+ return 1;
+}
+
+#else
+static inline int
+x86_backtrace_32(struct pt_regs * const regs, unsigned int depth)
+{
+ return 0;
+}
+#endif /* CONFIG_COMPAT */
+
+static struct stack_frame *dump_user_backtrace(struct stack_frame *head)
+{
+ /* Also check accessibility of one struct frame_head beyond: */
+ struct stack_frame bufhead[2];
+ unsigned long bytes;
+
+ bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
+ if (bytes != 0)
+ return NULL;
+
+ oprofile_add_trace(bufhead[0].return_address);
/* frame pointers should strictly progress back up the stack
* (towards higher addresses) */
- if (head >= bufhead[0].bp)
+ if (head >= bufhead[0].next_frame)
return NULL;
- return bufhead[0].bp;
+ return bufhead[0].next_frame;
}
void
x86_backtrace(struct pt_regs * const regs, unsigned int depth)
{
- struct frame_head *head = (struct frame_head *)frame_pointer(regs);
- unsigned long stack = kernel_trap_sp(regs);
+ struct stack_frame *head = (struct stack_frame *)frame_pointer(regs);
if (!user_mode_vm(regs)) {
+ unsigned long stack = kernel_stack_pointer(regs);
if (depth)
dump_trace(NULL, regs, (unsigned long *)stack, 0,
&backtrace_ops, &depth);
return;
}
+ if (x86_backtrace_32(regs, depth))
+ return;
+
while (depth-- && head)
head = dump_user_backtrace(head);
}
diff --git a/arch/x86/oprofile/init.c b/arch/x86/oprofile/init.c
index cdfe4c54dec..9e138d00ad3 100644
--- a/arch/x86/oprofile/init.c
+++ b/arch/x86/oprofile/init.c
@@ -16,34 +16,23 @@
* with the NMI mode driver.
*/
+#ifdef CONFIG_X86_LOCAL_APIC
extern int op_nmi_init(struct oprofile_operations *ops);
-extern int op_nmi_timer_init(struct oprofile_operations *ops);
extern void op_nmi_exit(void);
-extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
+#else
+static int op_nmi_init(struct oprofile_operations *ops) { return -ENODEV; }
+static void op_nmi_exit(void) { }
+#endif
+extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
- int ret;
-
- ret = -ENODEV;
-
-#ifdef CONFIG_X86_LOCAL_APIC
- ret = op_nmi_init(ops);
-#endif
-#ifdef CONFIG_X86_IO_APIC
- if (ret < 0)
- ret = op_nmi_timer_init(ops);
-#endif
ops->backtrace = x86_backtrace;
-
- return ret;
+ return op_nmi_init(ops);
}
-
void oprofile_arch_exit(void)
{
-#ifdef CONFIG_X86_LOCAL_APIC
op_nmi_exit();
-#endif
}
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 202864ad49a..379e8bd0dee 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -1,18 +1,21 @@
/**
* @file nmi_int.c
*
- * @remark Copyright 2002-2008 OProfile authors
+ * @remark Copyright 2002-2009 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon <levon@movementarian.org>
* @author Robert Richter <robert.richter@amd.com>
+ * @author Barry Kasindorf <barry.kasindorf@amd.com>
+ * @author Jason Yeh <jason.yeh@amd.com>
+ * @author Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
*/
#include <linux/init.h>
#include <linux/notifier.h>
#include <linux/smp.h>
#include <linux/oprofile.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/kdebug.h>
@@ -24,63 +27,279 @@
#include "op_counter.h"
#include "op_x86_model.h"
-static struct op_x86_model_spec const *model;
+static struct op_x86_model_spec *model;
static DEFINE_PER_CPU(struct op_msrs, cpu_msrs);
static DEFINE_PER_CPU(unsigned long, saved_lvtpc);
-/* 0 == registered but off, 1 == registered and on */
-static int nmi_enabled = 0;
+/* must be protected with get_online_cpus()/put_online_cpus(): */
+static int nmi_enabled;
+static int ctr_running;
-static int profile_exceptions_notify(struct notifier_block *self,
- unsigned long val, void *data)
+struct op_counter_config counter_config[OP_MAX_COUNTER];
+
+/* common functions */
+
+u64 op_x86_get_ctrl(struct op_x86_model_spec const *model,
+ struct op_counter_config *counter_config)
{
- struct die_args *args = (struct die_args *)data;
- int ret = NOTIFY_DONE;
- int cpu = smp_processor_id();
+ u64 val = 0;
+ u16 event = (u16)counter_config->event;
+
+ val |= ARCH_PERFMON_EVENTSEL_INT;
+ val |= counter_config->user ? ARCH_PERFMON_EVENTSEL_USR : 0;
+ val |= counter_config->kernel ? ARCH_PERFMON_EVENTSEL_OS : 0;
+ val |= (counter_config->unit_mask & 0xFF) << 8;
+ counter_config->extra &= (ARCH_PERFMON_EVENTSEL_INV |
+ ARCH_PERFMON_EVENTSEL_EDGE |
+ ARCH_PERFMON_EVENTSEL_CMASK);
+ val |= counter_config->extra;
+ event &= model->event_mask ? model->event_mask : 0xFF;
+ val |= event & 0xFF;
+ val |= (u64)(event & 0x0F00) << 24;
+
+ return val;
+}
- switch (val) {
- case DIE_NMI:
- if (model->check_ctrs(args->regs, &per_cpu(cpu_msrs, cpu)))
- ret = NOTIFY_STOP;
- break;
- default:
- break;
- }
- return ret;
+
+static int profile_exceptions_notify(unsigned int val, struct pt_regs *regs)
+{
+ if (ctr_running)
+ model->check_ctrs(regs, &__get_cpu_var(cpu_msrs));
+ else if (!nmi_enabled)
+ return NMI_DONE;
+ else
+ model->stop(&__get_cpu_var(cpu_msrs));
+ return NMI_HANDLED;
}
static void nmi_cpu_save_registers(struct op_msrs *msrs)
{
- unsigned int const nr_ctrs = model->num_counters;
- unsigned int const nr_ctrls = model->num_controls;
struct op_msr *counters = msrs->counters;
struct op_msr *controls = msrs->controls;
unsigned int i;
- for (i = 0; i < nr_ctrs; ++i) {
- if (counters[i].addr) {
- rdmsr(counters[i].addr,
- counters[i].saved.low,
- counters[i].saved.high);
- }
+ for (i = 0; i < model->num_counters; ++i) {
+ if (counters[i].addr)
+ rdmsrl(counters[i].addr, counters[i].saved);
}
- for (i = 0; i < nr_ctrls; ++i) {
- if (controls[i].addr) {
- rdmsr(controls[i].addr,
- controls[i].saved.low,
- controls[i].saved.high);
+ for (i = 0; i < model->num_controls; ++i) {
+ if (controls[i].addr)
+ rdmsrl(controls[i].addr, controls[i].saved);
+ }
+}
+
+static void nmi_cpu_start(void *dummy)
+{
+ struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs);
+ if (!msrs->controls)
+ WARN_ON_ONCE(1);
+ else
+ model->start(msrs);
+}
+
+static int nmi_start(void)
+{
+ get_online_cpus();
+ ctr_running = 1;
+ /* make ctr_running visible to the nmi handler: */
+ smp_mb();
+ on_each_cpu(nmi_cpu_start, NULL, 1);
+ put_online_cpus();
+ return 0;
+}
+
+static void nmi_cpu_stop(void *dummy)
+{
+ struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs);
+ if (!msrs->controls)
+ WARN_ON_ONCE(1);
+ else
+ model->stop(msrs);
+}
+
+static void nmi_stop(void)
+{
+ get_online_cpus();
+ on_each_cpu(nmi_cpu_stop, NULL, 1);
+ ctr_running = 0;
+ put_online_cpus();
+}
+
+#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
+
+static DEFINE_PER_CPU(int, switch_index);
+
+static inline int has_mux(void)
+{
+ return !!model->switch_ctrl;
+}
+
+inline int op_x86_phys_to_virt(int phys)
+{
+ return __this_cpu_read(switch_index) + phys;
+}
+
+inline int op_x86_virt_to_phys(int virt)
+{
+ return virt % model->num_counters;
+}
+
+static void nmi_shutdown_mux(void)
+{
+ int i;
+
+ if (!has_mux())
+ return;
+
+ for_each_possible_cpu(i) {
+ kfree(per_cpu(cpu_msrs, i).multiplex);
+ per_cpu(cpu_msrs, i).multiplex = NULL;
+ per_cpu(switch_index, i) = 0;
+ }
+}
+
+static int nmi_setup_mux(void)
+{
+ size_t multiplex_size =
+ sizeof(struct op_msr) * model->num_virt_counters;
+ int i;
+
+ if (!has_mux())
+ return 1;
+
+ for_each_possible_cpu(i) {
+ per_cpu(cpu_msrs, i).multiplex =
+ kzalloc(multiplex_size, GFP_KERNEL);
+ if (!per_cpu(cpu_msrs, i).multiplex)
+ return 0;
+ }
+
+ return 1;
+}
+
+static void nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs)
+{
+ int i;
+ struct op_msr *multiplex = msrs->multiplex;
+
+ if (!has_mux())
+ return;
+
+ for (i = 0; i < model->num_virt_counters; ++i) {
+ if (counter_config[i].enabled) {
+ multiplex[i].saved = -(u64)counter_config[i].count;
+ } else {
+ multiplex[i].saved = 0;
}
}
+
+ per_cpu(switch_index, cpu) = 0;
+}
+
+static void nmi_cpu_save_mpx_registers(struct op_msrs *msrs)
+{
+ struct op_msr *counters = msrs->counters;
+ struct op_msr *multiplex = msrs->multiplex;
+ int i;
+
+ for (i = 0; i < model->num_counters; ++i) {
+ int virt = op_x86_phys_to_virt(i);
+ if (counters[i].addr)
+ rdmsrl(counters[i].addr, multiplex[virt].saved);
+ }
}
-static void nmi_save_registers(void *dummy)
+static void nmi_cpu_restore_mpx_registers(struct op_msrs *msrs)
+{
+ struct op_msr *counters = msrs->counters;
+ struct op_msr *multiplex = msrs->multiplex;
+ int i;
+
+ for (i = 0; i < model->num_counters; ++i) {
+ int virt = op_x86_phys_to_virt(i);
+ if (counters[i].addr)
+ wrmsrl(counters[i].addr, multiplex[virt].saved);
+ }
+}
+
+static void nmi_cpu_switch(void *dummy)
{
int cpu = smp_processor_id();
+ int si = per_cpu(switch_index, cpu);
struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
- nmi_cpu_save_registers(msrs);
+
+ nmi_cpu_stop(NULL);
+ nmi_cpu_save_mpx_registers(msrs);
+
+ /* move to next set */
+ si += model->num_counters;
+ if ((si >= model->num_virt_counters) || (counter_config[si].count == 0))
+ per_cpu(switch_index, cpu) = 0;
+ else
+ per_cpu(switch_index, cpu) = si;
+
+ model->switch_ctrl(model, msrs);
+ nmi_cpu_restore_mpx_registers(msrs);
+
+ nmi_cpu_start(NULL);
+}
+
+
+/*
+ * Quick check to see if multiplexing is necessary.
+ * The check should be sufficient since counters are used
+ * in ordre.
+ */
+static int nmi_multiplex_on(void)
+{
+ return counter_config[model->num_counters].count ? 0 : -EINVAL;
+}
+
+static int nmi_switch_event(void)
+{
+ if (!has_mux())
+ return -ENOSYS; /* not implemented */
+ if (nmi_multiplex_on() < 0)
+ return -EINVAL; /* not necessary */
+
+ get_online_cpus();
+ if (ctr_running)
+ on_each_cpu(nmi_cpu_switch, NULL, 1);
+ put_online_cpus();
+
+ return 0;
}
+static inline void mux_init(struct oprofile_operations *ops)
+{
+ if (has_mux())
+ ops->switch_events = nmi_switch_event;
+}
+
+static void mux_clone(int cpu)
+{
+ if (!has_mux())
+ return;
+
+ memcpy(per_cpu(cpu_msrs, cpu).multiplex,
+ per_cpu(cpu_msrs, 0).multiplex,
+ sizeof(struct op_msr) * model->num_virt_counters);
+}
+
+#else
+
+inline int op_x86_phys_to_virt(int phys) { return phys; }
+inline int op_x86_virt_to_phys(int virt) { return virt; }
+static inline void nmi_shutdown_mux(void) { }
+static inline int nmi_setup_mux(void) { return 1; }
+static inline void
+nmi_cpu_setup_mux(int cpu, struct op_msrs const * const msrs) { }
+static inline void mux_init(struct oprofile_operations *ops) { }
+static void mux_clone(int cpu) { }
+
+#endif
+
static void free_msrs(void)
{
int i;
@@ -90,113 +309,63 @@ static void free_msrs(void)
kfree(per_cpu(cpu_msrs, i).controls);
per_cpu(cpu_msrs, i).controls = NULL;
}
+ nmi_shutdown_mux();
}
static int allocate_msrs(void)
{
- int success = 1;
size_t controls_size = sizeof(struct op_msr) * model->num_controls;
size_t counters_size = sizeof(struct op_msr) * model->num_counters;
int i;
for_each_possible_cpu(i) {
- per_cpu(cpu_msrs, i).counters = kmalloc(counters_size,
- GFP_KERNEL);
- if (!per_cpu(cpu_msrs, i).counters) {
- success = 0;
- break;
- }
- per_cpu(cpu_msrs, i).controls = kmalloc(controls_size,
- GFP_KERNEL);
- if (!per_cpu(cpu_msrs, i).controls) {
- success = 0;
- break;
- }
+ per_cpu(cpu_msrs, i).counters = kzalloc(counters_size,
+ GFP_KERNEL);
+ if (!per_cpu(cpu_msrs, i).counters)
+ goto fail;
+ per_cpu(cpu_msrs, i).controls = kzalloc(controls_size,
+ GFP_KERNEL);
+ if (!per_cpu(cpu_msrs, i).controls)
+ goto fail;
}
- if (!success)
- free_msrs();
+ if (!nmi_setup_mux())
+ goto fail;
+
+ return 1;
- return success;
+fail:
+ free_msrs();
+ return 0;
}
static void nmi_cpu_setup(void *dummy)
{
int cpu = smp_processor_id();
struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
- spin_lock(&oprofilefs_lock);
- model->setup_ctrs(msrs);
- spin_unlock(&oprofilefs_lock);
+ nmi_cpu_save_registers(msrs);
+ raw_spin_lock(&oprofilefs_lock);
+ model->setup_ctrs(model, msrs);
+ nmi_cpu_setup_mux(cpu, msrs);
+ raw_spin_unlock(&oprofilefs_lock);
per_cpu(saved_lvtpc, cpu) = apic_read(APIC_LVTPC);
apic_write(APIC_LVTPC, APIC_DM_NMI);
}
-static struct notifier_block profile_exceptions_nb = {
- .notifier_call = profile_exceptions_notify,
- .next = NULL,
- .priority = 0
-};
-
-static int nmi_setup(void)
-{
- int err = 0;
- int cpu;
-
- if (!allocate_msrs())
- return -ENOMEM;
-
- err = register_die_notifier(&profile_exceptions_nb);
- if (err) {
- free_msrs();
- return err;
- }
-
- /* We need to serialize save and setup for HT because the subset
- * of msrs are distinct for save and setup operations
- */
-
- /* Assume saved/restored counters are the same on all CPUs */
- model->fill_in_addresses(&per_cpu(cpu_msrs, 0));
- for_each_possible_cpu(cpu) {
- if (cpu != 0) {
- memcpy(per_cpu(cpu_msrs, cpu).counters,
- per_cpu(cpu_msrs, 0).counters,
- sizeof(struct op_msr) * model->num_counters);
-
- memcpy(per_cpu(cpu_msrs, cpu).controls,
- per_cpu(cpu_msrs, 0).controls,
- sizeof(struct op_msr) * model->num_controls);
- }
-
- }
- on_each_cpu(nmi_save_registers, NULL, 1);
- on_each_cpu(nmi_cpu_setup, NULL, 1);
- nmi_enabled = 1;
- return 0;
-}
-
-static void nmi_restore_registers(struct op_msrs *msrs)
+static void nmi_cpu_restore_registers(struct op_msrs *msrs)
{
- unsigned int const nr_ctrs = model->num_counters;
- unsigned int const nr_ctrls = model->num_controls;
struct op_msr *counters = msrs->counters;
struct op_msr *controls = msrs->controls;
unsigned int i;
- for (i = 0; i < nr_ctrls; ++i) {
- if (controls[i].addr) {
- wrmsr(controls[i].addr,
- controls[i].saved.low,
- controls[i].saved.high);
- }
+ for (i = 0; i < model->num_controls; ++i) {
+ if (controls[i].addr)
+ wrmsrl(controls[i].addr, controls[i].saved);
}
- for (i = 0; i < nr_ctrs; ++i) {
- if (counters[i].addr) {
- wrmsr(counters[i].addr,
- counters[i].saved.low,
- counters[i].saved.high);
- }
+ for (i = 0; i < model->num_counters; ++i) {
+ if (counters[i].addr)
+ wrmsrl(counters[i].addr, counters[i].saved);
}
}
@@ -204,7 +373,7 @@ static void nmi_cpu_shutdown(void *dummy)
{
unsigned int v;
int cpu = smp_processor_id();
- struct op_msrs *msrs = &__get_cpu_var(cpu_msrs);
+ struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
/* restoring APIC_LVTPC can trigger an apic error because the delivery
* mode and vector nr combination can be illegal. That's by design: on
@@ -215,52 +384,30 @@ static void nmi_cpu_shutdown(void *dummy)
apic_write(APIC_LVTERR, v | APIC_LVT_MASKED);
apic_write(APIC_LVTPC, per_cpu(saved_lvtpc, cpu));
apic_write(APIC_LVTERR, v);
- nmi_restore_registers(msrs);
+ nmi_cpu_restore_registers(msrs);
}
-static void nmi_shutdown(void)
+static void nmi_cpu_up(void *dummy)
{
- struct op_msrs *msrs;
-
- nmi_enabled = 0;
- on_each_cpu(nmi_cpu_shutdown, NULL, 1);
- unregister_die_notifier(&profile_exceptions_nb);
- msrs = &get_cpu_var(cpu_msrs);
- model->shutdown(msrs);
- free_msrs();
- put_cpu_var(cpu_msrs);
+ if (nmi_enabled)
+ nmi_cpu_setup(dummy);
+ if (ctr_running)
+ nmi_cpu_start(dummy);
}
-static void nmi_cpu_start(void *dummy)
+static void nmi_cpu_down(void *dummy)
{
- struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs);
- model->start(msrs);
-}
-
-static int nmi_start(void)
-{
- on_each_cpu(nmi_cpu_start, NULL, 1);
- return 0;
+ if (ctr_running)
+ nmi_cpu_stop(dummy);
+ if (nmi_enabled)
+ nmi_cpu_shutdown(dummy);
}
-static void nmi_cpu_stop(void *dummy)
-{
- struct op_msrs const *msrs = &__get_cpu_var(cpu_msrs);
- model->stop(msrs);
-}
-
-static void nmi_stop(void)
-{
- on_each_cpu(nmi_cpu_stop, NULL, 1);
-}
-
-struct op_counter_config counter_config[OP_MAX_COUNTER];
-
-static int nmi_create_files(struct super_block *sb, struct dentry *root)
+static int nmi_create_files(struct dentry *root)
{
unsigned int i;
- for (i = 0; i < model->num_counters; ++i) {
+ for (i = 0; i < model->num_virt_counters; ++i) {
struct dentry *dir;
char buf[4];
@@ -269,23 +416,23 @@ static int nmi_create_files(struct super_block *sb, struct dentry *root)
* NOTE: assumes 1:1 mapping here (that counters are organized
* sequentially in their struct assignment).
*/
- if (unlikely(!avail_to_resrv_perfctr_nmi_bit(i)))
+ if (!avail_to_resrv_perfctr_nmi_bit(op_x86_virt_to_phys(i)))
continue;
snprintf(buf, sizeof(buf), "%d", i);
- dir = oprofilefs_mkdir(sb, root, buf);
- oprofilefs_create_ulong(sb, dir, "enabled", &counter_config[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event", &counter_config[i].event);
- oprofilefs_create_ulong(sb, dir, "count", &counter_config[i].count);
- oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask);
- oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user);
+ dir = oprofilefs_mkdir(root, buf);
+ oprofilefs_create_ulong(dir, "enabled", &counter_config[i].enabled);
+ oprofilefs_create_ulong(dir, "event", &counter_config[i].event);
+ oprofilefs_create_ulong(dir, "count", &counter_config[i].count);
+ oprofilefs_create_ulong(dir, "unit_mask", &counter_config[i].unit_mask);
+ oprofilefs_create_ulong(dir, "kernel", &counter_config[i].kernel);
+ oprofilefs_create_ulong(dir, "user", &counter_config[i].user);
+ oprofilefs_create_ulong(dir, "extra", &counter_config[i].extra);
}
return 0;
}
-#ifdef CONFIG_SMP
static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action,
void *data)
{
@@ -293,10 +440,10 @@ static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action,
switch (action) {
case CPU_DOWN_FAILED:
case CPU_ONLINE:
- smp_call_function_single(cpu, nmi_cpu_start, NULL, 0);
+ smp_call_function_single(cpu, nmi_cpu_up, NULL, 0);
break;
case CPU_DOWN_PREPARE:
- smp_call_function_single(cpu, nmi_cpu_stop, NULL, 1);
+ smp_call_function_single(cpu, nmi_cpu_down, NULL, 1);
break;
}
return NOTIFY_DONE;
@@ -305,11 +452,95 @@ static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action,
static struct notifier_block oprofile_cpu_nb = {
.notifier_call = oprofile_cpu_notifier
};
-#endif
+
+static int nmi_setup(void)
+{
+ int err = 0;
+ int cpu;
+
+ if (!allocate_msrs())
+ return -ENOMEM;
+
+ /* We need to serialize save and setup for HT because the subset
+ * of msrs are distinct for save and setup operations
+ */
+
+ /* Assume saved/restored counters are the same on all CPUs */
+ err = model->fill_in_addresses(&per_cpu(cpu_msrs, 0));
+ if (err)
+ goto fail;
+
+ for_each_possible_cpu(cpu) {
+ if (!cpu)
+ continue;
+
+ memcpy(per_cpu(cpu_msrs, cpu).counters,
+ per_cpu(cpu_msrs, 0).counters,
+ sizeof(struct op_msr) * model->num_counters);
+
+ memcpy(per_cpu(cpu_msrs, cpu).controls,
+ per_cpu(cpu_msrs, 0).controls,
+ sizeof(struct op_msr) * model->num_controls);
+
+ mux_clone(cpu);
+ }
+
+ nmi_enabled = 0;
+ ctr_running = 0;
+ /* make variables visible to the nmi handler: */
+ smp_mb();
+ err = register_nmi_handler(NMI_LOCAL, profile_exceptions_notify,
+ 0, "oprofile");
+ if (err)
+ goto fail;
+
+ cpu_notifier_register_begin();
+
+ /* Use get/put_online_cpus() to protect 'nmi_enabled' */
+ get_online_cpus();
+ nmi_enabled = 1;
+ /* make nmi_enabled visible to the nmi handler: */
+ smp_mb();
+ on_each_cpu(nmi_cpu_setup, NULL, 1);
+ __register_cpu_notifier(&oprofile_cpu_nb);
+ put_online_cpus();
+
+ cpu_notifier_register_done();
+
+ return 0;
+fail:
+ free_msrs();
+ return err;
+}
+
+static void nmi_shutdown(void)
+{
+ struct op_msrs *msrs;
+
+ cpu_notifier_register_begin();
+
+ /* Use get/put_online_cpus() to protect 'nmi_enabled' & 'ctr_running' */
+ get_online_cpus();
+ on_each_cpu(nmi_cpu_shutdown, NULL, 1);
+ nmi_enabled = 0;
+ ctr_running = 0;
+ __unregister_cpu_notifier(&oprofile_cpu_nb);
+ put_online_cpus();
+
+ cpu_notifier_register_done();
+
+ /* make variables visible to the nmi handler: */
+ smp_mb();
+ unregister_nmi_handler(NMI_LOCAL, "oprofile");
+ msrs = &get_cpu_var(cpu_msrs);
+ model->shutdown(msrs);
+ free_msrs();
+ put_cpu_var(cpu_msrs);
+}
#ifdef CONFIG_PM
-static int nmi_suspend(struct sys_device *dev, pm_message_t state)
+static int nmi_suspend(void)
{
/* Only one CPU left, just stop that one */
if (nmi_enabled == 1)
@@ -317,53 +548,39 @@ static int nmi_suspend(struct sys_device *dev, pm_message_t state)
return 0;
}
-static int nmi_resume(struct sys_device *dev)
+static void nmi_resume(void)
{
if (nmi_enabled == 1)
nmi_cpu_start(NULL);
- return 0;
}
-static struct sysdev_class oprofile_sysclass = {
- .name = "oprofile",
+static struct syscore_ops oprofile_syscore_ops = {
.resume = nmi_resume,
.suspend = nmi_suspend,
};
-static struct sys_device device_oprofile = {
- .id = 0,
- .cls = &oprofile_sysclass,
-};
-
-static int __init init_sysfs(void)
+static void __init init_suspend_resume(void)
{
- int error;
-
- error = sysdev_class_register(&oprofile_sysclass);
- if (!error)
- error = sysdev_register(&device_oprofile);
- return error;
+ register_syscore_ops(&oprofile_syscore_ops);
}
-static void exit_sysfs(void)
+static void exit_suspend_resume(void)
{
- sysdev_unregister(&device_oprofile);
- sysdev_class_unregister(&oprofile_sysclass);
+ unregister_syscore_ops(&oprofile_syscore_ops);
}
#else
-#define init_sysfs() do { } while (0)
-#define exit_sysfs() do { } while (0)
-#endif /* CONFIG_PM */
-static int p4force;
-module_param(p4force, int, 0);
+static inline void init_suspend_resume(void) { }
+static inline void exit_suspend_resume(void) { }
+
+#endif /* CONFIG_PM */
static int __init p4_init(char **cpu_type)
{
__u8 cpu_model = boot_cpu_data.x86_model;
- if (!p4force && (cpu_model > 6 || cpu_model == 5))
+ if (cpu_model > 6 || cpu_model == 5)
return 0;
#ifndef CONFIG_SMP
@@ -389,10 +606,50 @@ static int __init p4_init(char **cpu_type)
return 0;
}
+enum __force_cpu_type {
+ reserved = 0, /* do not force */
+ timer,
+ arch_perfmon,
+};
+
+static int force_cpu_type;
+
+static int set_cpu_type(const char *str, struct kernel_param *kp)
+{
+ if (!strcmp(str, "timer")) {
+ force_cpu_type = timer;
+ printk(KERN_INFO "oprofile: forcing NMI timer mode\n");
+ } else if (!strcmp(str, "arch_perfmon")) {
+ force_cpu_type = arch_perfmon;
+ printk(KERN_INFO "oprofile: forcing architectural perfmon\n");
+ } else {
+ force_cpu_type = 0;
+ }
+
+ return 0;
+}
+module_param_call(cpu_type, set_cpu_type, NULL, NULL, 0);
+
static int __init ppro_init(char **cpu_type)
{
__u8 cpu_model = boot_cpu_data.x86_model;
+ struct op_x86_model_spec *spec = &op_ppro_spec; /* default */
+ if (force_cpu_type == arch_perfmon && cpu_has_arch_perfmon)
+ return 0;
+
+ /*
+ * Documentation on identifying Intel processors by CPU family
+ * and model can be found in the Intel Software Developer's
+ * Manuals (SDM):
+ *
+ * http://www.intel.com/products/processor/manuals/
+ *
+ * As of May 2010 the documentation for this was in the:
+ * "Intel 64 and IA-32 Architectures Software Developer's
+ * Manual Volume 3B: System Programming Guide", "Table B-1
+ * CPUID Signature Values of DisplayFamily_DisplayModel".
+ */
switch (cpu_model) {
case 0 ... 2:
*cpu_type = "i386/ppro";
@@ -411,31 +668,30 @@ static int __init ppro_init(char **cpu_type)
case 14:
*cpu_type = "i386/core";
break;
- case 15: case 23:
+ case 0x0f:
+ case 0x16:
+ case 0x17:
+ case 0x1d:
*cpu_type = "i386/core_2";
break;
+ case 0x1a:
+ case 0x1e:
+ case 0x2e:
+ spec = &op_arch_perfmon_spec;
+ *cpu_type = "i386/core_i7";
+ break;
+ case 0x1c:
+ *cpu_type = "i386/atom";
+ break;
default:
/* Unknown */
return 0;
}
- model = &op_ppro_spec;
- return 1;
-}
-
-static int __init arch_perfmon_init(char **cpu_type)
-{
- if (!cpu_has_arch_perfmon)
- return 0;
- *cpu_type = "i386/arch_perfmon";
- model = &op_arch_perfmon_spec;
- arch_perfmon_setup_counters();
+ model = spec;
return 1;
}
-/* in order to get sysfs right */
-static int using_nmi;
-
int __init op_nmi_init(struct oprofile_operations *ops)
{
__u8 vendor = boot_cpu_data.x86_vendor;
@@ -446,32 +702,43 @@ int __init op_nmi_init(struct oprofile_operations *ops)
if (!cpu_has_apic)
return -ENODEV;
+ if (force_cpu_type == timer)
+ return -ENODEV;
+
switch (vendor) {
case X86_VENDOR_AMD:
/* Needs to be at least an Athlon (or hammer in 32bit mode) */
switch (family) {
- default:
- return -ENODEV;
case 6:
- model = &op_amd_spec;
cpu_type = "i386/athlon";
break;
case 0xf:
- model = &op_amd_spec;
- /* Actually it could be i386/hammer too, but give
- user space an consistent name. */
+ /*
+ * Actually it could be i386/hammer too, but
+ * give user space an consistent name.
+ */
cpu_type = "x86-64/hammer";
break;
case 0x10:
- model = &op_amd_spec;
cpu_type = "x86-64/family10";
break;
case 0x11:
- model = &op_amd_spec;
cpu_type = "x86-64/family11h";
break;
+ case 0x12:
+ cpu_type = "x86-64/family12h";
+ break;
+ case 0x14:
+ cpu_type = "x86-64/family14h";
+ break;
+ case 0x15:
+ cpu_type = "x86-64/family15h";
+ break;
+ default:
+ return -ENODEV;
}
+ model = &op_amd_spec;
break;
case X86_VENDOR_INTEL:
@@ -490,44 +757,46 @@ int __init op_nmi_init(struct oprofile_operations *ops)
break;
}
- if (!cpu_type && !arch_perfmon_init(&cpu_type))
+ if (cpu_type)
+ break;
+
+ if (!cpu_has_arch_perfmon)
return -ENODEV;
+
+ /* use arch perfmon as fallback */
+ cpu_type = "i386/arch_perfmon";
+ model = &op_arch_perfmon_spec;
break;
default:
return -ENODEV;
}
-#ifdef CONFIG_SMP
- register_cpu_notifier(&oprofile_cpu_nb);
-#endif
/* default values, can be overwritten by model */
- ops->create_files = nmi_create_files;
- ops->setup = nmi_setup;
- ops->shutdown = nmi_shutdown;
- ops->start = nmi_start;
- ops->stop = nmi_stop;
- ops->cpu_type = cpu_type;
+ ops->create_files = nmi_create_files;
+ ops->setup = nmi_setup;
+ ops->shutdown = nmi_shutdown;
+ ops->start = nmi_start;
+ ops->stop = nmi_stop;
+ ops->cpu_type = cpu_type;
if (model->init)
ret = model->init(ops);
if (ret)
return ret;
- init_sysfs();
- using_nmi = 1;
+ if (!model->num_virt_counters)
+ model->num_virt_counters = model->num_counters;
+
+ mux_init(ops);
+
+ init_suspend_resume();
+
printk(KERN_INFO "oprofile: using NMI interrupt.\n");
return 0;
}
void op_nmi_exit(void)
{
- if (using_nmi) {
- exit_sysfs();
-#ifdef CONFIG_SMP
- unregister_cpu_notifier(&oprofile_cpu_nb);
-#endif
- }
- if (model->exit)
- model->exit();
+ exit_suspend_resume();
}
diff --git a/arch/x86/oprofile/nmi_timer_int.c b/arch/x86/oprofile/nmi_timer_int.c
deleted file mode 100644
index e3ecb71b579..00000000000
--- a/arch/x86/oprofile/nmi_timer_int.c
+++ /dev/null
@@ -1,69 +0,0 @@
-/**
- * @file nmi_timer_int.c
- *
- * @remark Copyright 2003 OProfile authors
- * @remark Read the file COPYING
- *
- * @author Zwane Mwaikambo <zwane@linuxpower.ca>
- */
-
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/oprofile.h>
-#include <linux/rcupdate.h>
-#include <linux/kdebug.h>
-
-#include <asm/nmi.h>
-#include <asm/apic.h>
-#include <asm/ptrace.h>
-
-static int profile_timer_exceptions_notify(struct notifier_block *self,
- unsigned long val, void *data)
-{
- struct die_args *args = (struct die_args *)data;
- int ret = NOTIFY_DONE;
-
- switch (val) {
- case DIE_NMI:
- oprofile_add_sample(args->regs, 0);
- ret = NOTIFY_STOP;
- break;
- default:
- break;
- }
- return ret;
-}
-
-static struct notifier_block profile_timer_exceptions_nb = {
- .notifier_call = profile_timer_exceptions_notify,
- .next = NULL,
- .priority = 0
-};
-
-static int timer_start(void)
-{
- if (register_die_notifier(&profile_timer_exceptions_nb))
- return 1;
- return 0;
-}
-
-
-static void timer_stop(void)
-{
- unregister_die_notifier(&profile_timer_exceptions_nb);
- synchronize_sched(); /* Allow already-started NMIs to complete. */
-}
-
-
-int __init op_nmi_timer_init(struct oprofile_operations *ops)
-{
- if ((nmi_watchdog != NMI_IO_APIC) || (atomic_read(&nmi_active) <= 0))
- return -ENODEV;
-
- ops->start = timer_start;
- ops->stop = timer_stop;
- ops->cpu_type = "timer";
- printk(KERN_INFO "oprofile: using NMI timer interrupt.\n");
- return 0;
-}
diff --git a/arch/x86/oprofile/op_counter.h b/arch/x86/oprofile/op_counter.h
index 91b6a116165..0b7b7b179cb 100644
--- a/arch/x86/oprofile/op_counter.h
+++ b/arch/x86/oprofile/op_counter.h
@@ -10,7 +10,7 @@
#ifndef OP_COUNTER_H
#define OP_COUNTER_H
-#define OP_MAX_COUNTER 8
+#define OP_MAX_COUNTER 32
/* Per-perfctr configuration as set via
* oprofilefs.
@@ -22,6 +22,7 @@ struct op_counter_config {
unsigned long kernel;
unsigned long user;
unsigned long unit_mask;
+ unsigned long extra;
};
extern struct op_counter_config counter_config[];
diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c
index 8fdf06e4edf..50d86c0e9ba 100644
--- a/arch/x86/oprofile/op_model_amd.c
+++ b/arch/x86/oprofile/op_model_amd.c
@@ -9,496 +9,535 @@
* @author Philippe Elie
* @author Graydon Hoare
* @author Robert Richter <robert.richter@amd.com>
- * @author Barry Kasindorf
+ * @author Barry Kasindorf <barry.kasindorf@amd.com>
+ * @author Jason Yeh <jason.yeh@amd.com>
+ * @author Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
*/
#include <linux/oprofile.h>
#include <linux/device.h>
#include <linux/pci.h>
+#include <linux/percpu.h>
#include <asm/ptrace.h>
#include <asm/msr.h>
#include <asm/nmi.h>
+#include <asm/apic.h>
+#include <asm/processor.h>
+#include <asm/cpufeature.h>
#include "op_x86_model.h"
#include "op_counter.h"
-#define NUM_COUNTERS 4
-#define NUM_CONTROLS 4
-
-#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)
-#define CTR_READ(l, h, msrs, c) do {rdmsr(msrs->counters[(c)].addr, (l), (h)); } while (0)
-#define CTR_WRITE(l, msrs, c) do {wrmsr(msrs->counters[(c)].addr, -(unsigned int)(l), -1); } while (0)
-#define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
-
-#define CTRL_IS_RESERVED(msrs, c) (msrs->controls[(c)].addr ? 1 : 0)
-#define CTRL_READ(l, h, msrs, c) do {rdmsr(msrs->controls[(c)].addr, (l), (h)); } while (0)
-#define CTRL_WRITE(l, h, msrs, c) do {wrmsr(msrs->controls[(c)].addr, (l), (h)); } while (0)
-#define CTRL_SET_ACTIVE(n) (n |= (1<<22))
-#define CTRL_SET_INACTIVE(n) (n &= ~(1<<22))
-#define CTRL_CLEAR_LO(x) (x &= (1<<21))
-#define CTRL_CLEAR_HI(x) (x &= 0xfffffcf0)
-#define CTRL_SET_ENABLE(val) (val |= 1<<20)
-#define CTRL_SET_USR(val, u) (val |= ((u & 1) << 16))
-#define CTRL_SET_KERN(val, k) (val |= ((k & 1) << 17))
-#define CTRL_SET_UM(val, m) (val |= (m << 8))
-#define CTRL_SET_EVENT_LOW(val, e) (val |= (e & 0xff))
-#define CTRL_SET_EVENT_HIGH(val, e) (val |= ((e >> 8) & 0xf))
-#define CTRL_SET_HOST_ONLY(val, h) (val |= ((h & 1) << 9))
-#define CTRL_SET_GUEST_ONLY(val, h) (val |= ((h & 1) << 8))
-
-static unsigned long reset_value[NUM_COUNTERS];
-
-#ifdef CONFIG_OPROFILE_IBS
-
-/* IbsFetchCtl bits/masks */
-#define IBS_FETCH_HIGH_VALID_BIT (1UL << 17) /* bit 49 */
-#define IBS_FETCH_HIGH_ENABLE (1UL << 16) /* bit 48 */
-#define IBS_FETCH_LOW_MAX_CNT_MASK 0x0000FFFFUL /* MaxCnt mask */
-
-/*IbsOpCtl bits */
-#define IBS_OP_LOW_VALID_BIT (1ULL<<18) /* bit 18 */
-#define IBS_OP_LOW_ENABLE (1ULL<<17) /* bit 17 */
-
-#define IBS_FETCH_SIZE 6
-#define IBS_OP_SIZE 12
-
-static int has_ibs; /* AMD Family10h and later */
-
-struct op_ibs_config {
+#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
+#define NUM_VIRT_COUNTERS 32
+#else
+#define NUM_VIRT_COUNTERS 0
+#endif
+
+#define OP_EVENT_MASK 0x0FFF
+#define OP_CTR_OVERFLOW (1ULL<<31)
+
+#define MSR_AMD_EVENTSEL_RESERVED ((0xFFFFFCF0ULL<<32)|(1ULL<<21))
+
+static int num_counters;
+static unsigned long reset_value[OP_MAX_COUNTER];
+
+#define IBS_FETCH_SIZE 6
+#define IBS_OP_SIZE 12
+
+static u32 ibs_caps;
+
+struct ibs_config {
unsigned long op_enabled;
unsigned long fetch_enabled;
unsigned long max_cnt_fetch;
unsigned long max_cnt_op;
unsigned long rand_en;
unsigned long dispatched_ops;
+ unsigned long branch_target;
};
-static struct op_ibs_config ibs_config;
+struct ibs_state {
+ u64 ibs_op_ctl;
+ int branch_target;
+ unsigned long sample_size;
+};
-#endif
+static struct ibs_config ibs_config;
+static struct ibs_state ibs_state;
-/* functions for op_amd_spec */
+/*
+ * IBS randomization macros
+ */
+#define IBS_RANDOM_BITS 12
+#define IBS_RANDOM_MASK ((1ULL << IBS_RANDOM_BITS) - 1)
+#define IBS_RANDOM_MAXCNT_OFFSET (1ULL << (IBS_RANDOM_BITS - 5))
-static void op_amd_fill_in_addresses(struct op_msrs * const msrs)
+/*
+ * 16-bit Linear Feedback Shift Register (LFSR)
+ *
+ * 16 14 13 11
+ * Feedback polynomial = X + X + X + X + 1
+ */
+static unsigned int lfsr_random(void)
{
- int i;
+ static unsigned int lfsr_value = 0xF00D;
+ unsigned int bit;
- for (i = 0; i < NUM_COUNTERS; i++) {
- if (reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i))
- msrs->counters[i].addr = MSR_K7_PERFCTR0 + i;
- else
- msrs->counters[i].addr = 0;
- }
+ /* Compute next bit to shift in */
+ bit = ((lfsr_value >> 0) ^
+ (lfsr_value >> 2) ^
+ (lfsr_value >> 3) ^
+ (lfsr_value >> 5)) & 0x0001;
- for (i = 0; i < NUM_CONTROLS; i++) {
- if (reserve_evntsel_nmi(MSR_K7_EVNTSEL0 + i))
- msrs->controls[i].addr = MSR_K7_EVNTSEL0 + i;
- else
- msrs->controls[i].addr = 0;
- }
-}
+ /* Advance to next register value */
+ lfsr_value = (lfsr_value >> 1) | (bit << 15);
+ return lfsr_value;
+}
-static void op_amd_setup_ctrs(struct op_msrs const * const msrs)
+/*
+ * IBS software randomization
+ *
+ * The IBS periodic op counter is randomized in software. The lower 12
+ * bits of the 20 bit counter are randomized. IbsOpCurCnt is
+ * initialized with a 12 bit random value.
+ */
+static inline u64 op_amd_randomize_ibs_op(u64 val)
{
- unsigned int low, high;
- int i;
-
- /* clear all counters */
- for (i = 0 ; i < NUM_CONTROLS; ++i) {
- if (unlikely(!CTRL_IS_RESERVED(msrs, i)))
- continue;
- CTRL_READ(low, high, msrs, i);
- CTRL_CLEAR_LO(low);
- CTRL_CLEAR_HI(high);
- CTRL_WRITE(low, high, msrs, i);
- }
-
- /* avoid a false detection of ctr overflows in NMI handler */
- for (i = 0; i < NUM_COUNTERS; ++i) {
- if (unlikely(!CTR_IS_RESERVED(msrs, i)))
- continue;
- CTR_WRITE(1, msrs, i);
- }
-
- /* enable active counters */
- for (i = 0; i < NUM_COUNTERS; ++i) {
- if ((counter_config[i].enabled) && (CTR_IS_RESERVED(msrs, i))) {
- reset_value[i] = counter_config[i].count;
-
- CTR_WRITE(counter_config[i].count, msrs, i);
-
- CTRL_READ(low, high, msrs, i);
- CTRL_CLEAR_LO(low);
- CTRL_CLEAR_HI(high);
- CTRL_SET_ENABLE(low);
- CTRL_SET_USR(low, counter_config[i].user);
- CTRL_SET_KERN(low, counter_config[i].kernel);
- CTRL_SET_UM(low, counter_config[i].unit_mask);
- CTRL_SET_EVENT_LOW(low, counter_config[i].event);
- CTRL_SET_EVENT_HIGH(high, counter_config[i].event);
- CTRL_SET_HOST_ONLY(high, 0);
- CTRL_SET_GUEST_ONLY(high, 0);
-
- CTRL_WRITE(low, high, msrs, i);
- } else {
- reset_value[i] = 0;
- }
- }
+ unsigned int random = lfsr_random();
+
+ if (!(ibs_caps & IBS_CAPS_RDWROPCNT))
+ /*
+ * Work around if the hw can not write to IbsOpCurCnt
+ *
+ * Randomize the lower 8 bits of the 16 bit
+ * IbsOpMaxCnt [15:0] value in the range of -128 to
+ * +127 by adding/subtracting an offset to the
+ * maximum count (IbsOpMaxCnt).
+ *
+ * To avoid over or underflows and protect upper bits
+ * starting at bit 16, the initial value for
+ * IbsOpMaxCnt must fit in the range from 0x0081 to
+ * 0xff80.
+ */
+ val += (s8)(random >> 4);
+ else
+ val |= (u64)(random & IBS_RANDOM_MASK) << 32;
+
+ return val;
}
-#ifdef CONFIG_OPROFILE_IBS
-
-static inline int
+static inline void
op_amd_handle_ibs(struct pt_regs * const regs,
struct op_msrs const * const msrs)
{
- u32 low, high;
- u64 msr;
+ u64 val, ctl;
struct op_entry entry;
- if (!has_ibs)
- return 1;
+ if (!ibs_caps)
+ return;
if (ibs_config.fetch_enabled) {
- rdmsr(MSR_AMD64_IBSFETCHCTL, low, high);
- if (high & IBS_FETCH_HIGH_VALID_BIT) {
- rdmsrl(MSR_AMD64_IBSFETCHLINAD, msr);
- oprofile_write_reserve(&entry, regs, msr,
+ rdmsrl(MSR_AMD64_IBSFETCHCTL, ctl);
+ if (ctl & IBS_FETCH_VAL) {
+ rdmsrl(MSR_AMD64_IBSFETCHLINAD, val);
+ oprofile_write_reserve(&entry, regs, val,
IBS_FETCH_CODE, IBS_FETCH_SIZE);
- oprofile_add_data(&entry, (u32)msr);
- oprofile_add_data(&entry, (u32)(msr >> 32));
- oprofile_add_data(&entry, low);
- oprofile_add_data(&entry, high);
- rdmsrl(MSR_AMD64_IBSFETCHPHYSAD, msr);
- oprofile_add_data(&entry, (u32)msr);
- oprofile_add_data(&entry, (u32)(msr >> 32));
+ oprofile_add_data64(&entry, val);
+ oprofile_add_data64(&entry, ctl);
+ rdmsrl(MSR_AMD64_IBSFETCHPHYSAD, val);
+ oprofile_add_data64(&entry, val);
oprofile_write_commit(&entry);
/* reenable the IRQ */
- high &= ~IBS_FETCH_HIGH_VALID_BIT;
- high |= IBS_FETCH_HIGH_ENABLE;
- low &= IBS_FETCH_LOW_MAX_CNT_MASK;
- wrmsr(MSR_AMD64_IBSFETCHCTL, low, high);
+ ctl &= ~(IBS_FETCH_VAL | IBS_FETCH_CNT);
+ ctl |= IBS_FETCH_ENABLE;
+ wrmsrl(MSR_AMD64_IBSFETCHCTL, ctl);
}
}
if (ibs_config.op_enabled) {
- rdmsr(MSR_AMD64_IBSOPCTL, low, high);
- if (low & IBS_OP_LOW_VALID_BIT) {
- rdmsrl(MSR_AMD64_IBSOPRIP, msr);
- oprofile_write_reserve(&entry, regs, msr,
- IBS_OP_CODE, IBS_OP_SIZE);
- oprofile_add_data(&entry, (u32)msr);
- oprofile_add_data(&entry, (u32)(msr >> 32));
- rdmsrl(MSR_AMD64_IBSOPDATA, msr);
- oprofile_add_data(&entry, (u32)msr);
- oprofile_add_data(&entry, (u32)(msr >> 32));
- rdmsrl(MSR_AMD64_IBSOPDATA2, msr);
- oprofile_add_data(&entry, (u32)msr);
- oprofile_add_data(&entry, (u32)(msr >> 32));
- rdmsrl(MSR_AMD64_IBSOPDATA3, msr);
- oprofile_add_data(&entry, (u32)msr);
- oprofile_add_data(&entry, (u32)(msr >> 32));
- rdmsrl(MSR_AMD64_IBSDCLINAD, msr);
- oprofile_add_data(&entry, (u32)msr);
- oprofile_add_data(&entry, (u32)(msr >> 32));
- rdmsrl(MSR_AMD64_IBSDCPHYSAD, msr);
- oprofile_add_data(&entry, (u32)msr);
- oprofile_add_data(&entry, (u32)(msr >> 32));
+ rdmsrl(MSR_AMD64_IBSOPCTL, ctl);
+ if (ctl & IBS_OP_VAL) {
+ rdmsrl(MSR_AMD64_IBSOPRIP, val);
+ oprofile_write_reserve(&entry, regs, val, IBS_OP_CODE,
+ ibs_state.sample_size);
+ oprofile_add_data64(&entry, val);
+ rdmsrl(MSR_AMD64_IBSOPDATA, val);
+ oprofile_add_data64(&entry, val);
+ rdmsrl(MSR_AMD64_IBSOPDATA2, val);
+ oprofile_add_data64(&entry, val);
+ rdmsrl(MSR_AMD64_IBSOPDATA3, val);
+ oprofile_add_data64(&entry, val);
+ rdmsrl(MSR_AMD64_IBSDCLINAD, val);
+ oprofile_add_data64(&entry, val);
+ rdmsrl(MSR_AMD64_IBSDCPHYSAD, val);
+ oprofile_add_data64(&entry, val);
+ if (ibs_state.branch_target) {
+ rdmsrl(MSR_AMD64_IBSBRTARGET, val);
+ oprofile_add_data(&entry, (unsigned long)val);
+ }
oprofile_write_commit(&entry);
/* reenable the IRQ */
- high = 0;
- low &= ~IBS_OP_LOW_VALID_BIT;
- low |= IBS_OP_LOW_ENABLE;
- wrmsr(MSR_AMD64_IBSOPCTL, low, high);
+ ctl = op_amd_randomize_ibs_op(ibs_state.ibs_op_ctl);
+ wrmsrl(MSR_AMD64_IBSOPCTL, ctl);
}
}
-
- return 1;
}
-#endif
-
-static int op_amd_check_ctrs(struct pt_regs * const regs,
- struct op_msrs const * const msrs)
+static inline void op_amd_start_ibs(void)
{
- unsigned int low, high;
- int i;
+ u64 val;
- for (i = 0 ; i < NUM_COUNTERS; ++i) {
- if (!reset_value[i])
- continue;
- CTR_READ(low, high, msrs, i);
- if (CTR_OVERFLOWED(low)) {
- oprofile_add_sample(regs, i);
- CTR_WRITE(reset_value[i], msrs, i);
+ if (!ibs_caps)
+ return;
+
+ memset(&ibs_state, 0, sizeof(ibs_state));
+
+ /*
+ * Note: Since the max count settings may out of range we
+ * write back the actual used values so that userland can read
+ * it.
+ */
+
+ if (ibs_config.fetch_enabled) {
+ val = ibs_config.max_cnt_fetch >> 4;
+ val = min(val, IBS_FETCH_MAX_CNT);
+ ibs_config.max_cnt_fetch = val << 4;
+ val |= ibs_config.rand_en ? IBS_FETCH_RAND_EN : 0;
+ val |= IBS_FETCH_ENABLE;
+ wrmsrl(MSR_AMD64_IBSFETCHCTL, val);
+ }
+
+ if (ibs_config.op_enabled) {
+ val = ibs_config.max_cnt_op >> 4;
+ if (!(ibs_caps & IBS_CAPS_RDWROPCNT)) {
+ /*
+ * IbsOpCurCnt not supported. See
+ * op_amd_randomize_ibs_op() for details.
+ */
+ val = clamp(val, 0x0081ULL, 0xFF80ULL);
+ ibs_config.max_cnt_op = val << 4;
+ } else {
+ /*
+ * The start value is randomized with a
+ * positive offset, we need to compensate it
+ * with the half of the randomized range. Also
+ * avoid underflows.
+ */
+ val += IBS_RANDOM_MAXCNT_OFFSET;
+ if (ibs_caps & IBS_CAPS_OPCNTEXT)
+ val = min(val, IBS_OP_MAX_CNT_EXT);
+ else
+ val = min(val, IBS_OP_MAX_CNT);
+ ibs_config.max_cnt_op =
+ (val - IBS_RANDOM_MAXCNT_OFFSET) << 4;
+ }
+ val = ((val & ~IBS_OP_MAX_CNT) << 4) | (val & IBS_OP_MAX_CNT);
+ val |= ibs_config.dispatched_ops ? IBS_OP_CNT_CTL : 0;
+ val |= IBS_OP_ENABLE;
+ ibs_state.ibs_op_ctl = val;
+ ibs_state.sample_size = IBS_OP_SIZE;
+ if (ibs_config.branch_target) {
+ ibs_state.branch_target = 1;
+ ibs_state.sample_size++;
}
+ val = op_amd_randomize_ibs_op(ibs_state.ibs_op_ctl);
+ wrmsrl(MSR_AMD64_IBSOPCTL, val);
}
+}
-#ifdef CONFIG_OPROFILE_IBS
- op_amd_handle_ibs(regs, msrs);
-#endif
+static void op_amd_stop_ibs(void)
+{
+ if (!ibs_caps)
+ return;
- /* See op_model_ppro.c */
- return 1;
+ if (ibs_config.fetch_enabled)
+ /* clear max count and enable */
+ wrmsrl(MSR_AMD64_IBSFETCHCTL, 0);
+
+ if (ibs_config.op_enabled)
+ /* clear max count and enable */
+ wrmsrl(MSR_AMD64_IBSOPCTL, 0);
}
-static void op_amd_start(struct op_msrs const * const msrs)
+#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
+
+static void op_mux_switch_ctrl(struct op_x86_model_spec const *model,
+ struct op_msrs const * const msrs)
{
- unsigned int low, high;
+ u64 val;
int i;
- for (i = 0 ; i < NUM_COUNTERS ; ++i) {
- if (reset_value[i]) {
- CTRL_READ(low, high, msrs, i);
- CTRL_SET_ACTIVE(low);
- CTRL_WRITE(low, high, msrs, i);
- }
- }
-#ifdef CONFIG_OPROFILE_IBS
- if (has_ibs && ibs_config.fetch_enabled) {
- low = (ibs_config.max_cnt_fetch >> 4) & 0xFFFF;
- high = ((ibs_config.rand_en & 0x1) << 25) /* bit 57 */
- + IBS_FETCH_HIGH_ENABLE;
- wrmsr(MSR_AMD64_IBSFETCHCTL, low, high);
+ /* enable active counters */
+ for (i = 0; i < num_counters; ++i) {
+ int virt = op_x86_phys_to_virt(i);
+ if (!reset_value[virt])
+ continue;
+ rdmsrl(msrs->controls[i].addr, val);
+ val &= model->reserved;
+ val |= op_x86_get_ctrl(model, &counter_config[virt]);
+ wrmsrl(msrs->controls[i].addr, val);
}
+}
- if (has_ibs && ibs_config.op_enabled) {
- low = ((ibs_config.max_cnt_op >> 4) & 0xFFFF)
- + ((ibs_config.dispatched_ops & 0x1) << 19) /* bit 19 */
- + IBS_OP_LOW_ENABLE;
- high = 0;
- wrmsr(MSR_AMD64_IBSOPCTL, low, high);
- }
#endif
-}
+/* functions for op_amd_spec */
-static void op_amd_stop(struct op_msrs const * const msrs)
+static void op_amd_shutdown(struct op_msrs const * const msrs)
{
- unsigned int low, high;
int i;
- /*
- * Subtle: stop on all counters to avoid race with setting our
- * pm callback
- */
- for (i = 0 ; i < NUM_COUNTERS ; ++i) {
- if (!reset_value[i])
+ for (i = 0; i < num_counters; ++i) {
+ if (!msrs->counters[i].addr)
continue;
- CTRL_READ(low, high, msrs, i);
- CTRL_SET_INACTIVE(low);
- CTRL_WRITE(low, high, msrs, i);
+ release_perfctr_nmi(MSR_K7_PERFCTR0 + i);
+ release_evntsel_nmi(MSR_K7_EVNTSEL0 + i);
}
+}
-#ifdef CONFIG_OPROFILE_IBS
- if (has_ibs && ibs_config.fetch_enabled) {
- /* clear max count and enable */
- low = 0;
- high = 0;
- wrmsr(MSR_AMD64_IBSFETCHCTL, low, high);
- }
+static int op_amd_fill_in_addresses(struct op_msrs * const msrs)
+{
+ int i;
- if (has_ibs && ibs_config.op_enabled) {
- /* clear max count and enable */
- low = 0;
- high = 0;
- wrmsr(MSR_AMD64_IBSOPCTL, low, high);
+ for (i = 0; i < num_counters; i++) {
+ if (!reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i))
+ goto fail;
+ if (!reserve_evntsel_nmi(MSR_K7_EVNTSEL0 + i)) {
+ release_perfctr_nmi(MSR_K7_PERFCTR0 + i);
+ goto fail;
+ }
+ /* both registers must be reserved */
+ if (num_counters == AMD64_NUM_COUNTERS_CORE) {
+ msrs->counters[i].addr = MSR_F15H_PERF_CTR + (i << 1);
+ msrs->controls[i].addr = MSR_F15H_PERF_CTL + (i << 1);
+ } else {
+ msrs->controls[i].addr = MSR_K7_EVNTSEL0 + i;
+ msrs->counters[i].addr = MSR_K7_PERFCTR0 + i;
+ }
+ continue;
+ fail:
+ if (!counter_config[i].enabled)
+ continue;
+ op_x86_warn_reserved(i);
+ op_amd_shutdown(msrs);
+ return -EBUSY;
}
-#endif
+
+ return 0;
}
-static void op_amd_shutdown(struct op_msrs const * const msrs)
+static void op_amd_setup_ctrs(struct op_x86_model_spec const *model,
+ struct op_msrs const * const msrs)
{
+ u64 val;
int i;
- for (i = 0 ; i < NUM_COUNTERS ; ++i) {
- if (CTR_IS_RESERVED(msrs, i))
- release_perfctr_nmi(MSR_K7_PERFCTR0 + i);
- }
- for (i = 0 ; i < NUM_CONTROLS ; ++i) {
- if (CTRL_IS_RESERVED(msrs, i))
- release_evntsel_nmi(MSR_K7_EVNTSEL0 + i);
+ /* setup reset_value */
+ for (i = 0; i < OP_MAX_COUNTER; ++i) {
+ if (counter_config[i].enabled
+ && msrs->counters[op_x86_virt_to_phys(i)].addr)
+ reset_value[i] = counter_config[i].count;
+ else
+ reset_value[i] = 0;
}
-}
-#ifdef CONFIG_OPROFILE_IBS
+ /* clear all counters */
+ for (i = 0; i < num_counters; ++i) {
+ if (!msrs->controls[i].addr)
+ continue;
+ rdmsrl(msrs->controls[i].addr, val);
+ if (val & ARCH_PERFMON_EVENTSEL_ENABLE)
+ op_x86_warn_in_use(i);
+ val &= model->reserved;
+ wrmsrl(msrs->controls[i].addr, val);
+ /*
+ * avoid a false detection of ctr overflows in NMI
+ * handler
+ */
+ wrmsrl(msrs->counters[i].addr, -1LL);
+ }
-static u8 ibs_eilvt_off;
+ /* enable active counters */
+ for (i = 0; i < num_counters; ++i) {
+ int virt = op_x86_phys_to_virt(i);
+ if (!reset_value[virt])
+ continue;
-static inline void apic_init_ibs_nmi_per_cpu(void *arg)
-{
- ibs_eilvt_off = setup_APIC_eilvt_ibs(0, APIC_EILVT_MSG_NMI, 0);
-}
+ /* setup counter registers */
+ wrmsrl(msrs->counters[i].addr, -(u64)reset_value[virt]);
-static inline void apic_clear_ibs_nmi_per_cpu(void *arg)
-{
- setup_APIC_eilvt_ibs(0, APIC_EILVT_MSG_FIX, 1);
+ /* setup control registers */
+ rdmsrl(msrs->controls[i].addr, val);
+ val &= model->reserved;
+ val |= op_x86_get_ctrl(model, &counter_config[virt]);
+ wrmsrl(msrs->controls[i].addr, val);
+ }
}
-static int init_ibs_nmi(void)
+static int op_amd_check_ctrs(struct pt_regs * const regs,
+ struct op_msrs const * const msrs)
{
-#define IBSCTL_LVTOFFSETVAL (1 << 8)
-#define IBSCTL 0x1cc
- struct pci_dev *cpu_cfg;
- int nodes;
- u32 value = 0;
-
- /* per CPU setup */
- on_each_cpu(apic_init_ibs_nmi_per_cpu, NULL, 1);
-
- nodes = 0;
- cpu_cfg = NULL;
- do {
- cpu_cfg = pci_get_device(PCI_VENDOR_ID_AMD,
- PCI_DEVICE_ID_AMD_10H_NB_MISC,
- cpu_cfg);
- if (!cpu_cfg)
- break;
- ++nodes;
- pci_write_config_dword(cpu_cfg, IBSCTL, ibs_eilvt_off
- | IBSCTL_LVTOFFSETVAL);
- pci_read_config_dword(cpu_cfg, IBSCTL, &value);
- if (value != (ibs_eilvt_off | IBSCTL_LVTOFFSETVAL)) {
- pci_dev_put(cpu_cfg);
- printk(KERN_DEBUG "Failed to setup IBS LVT offset, "
- "IBSCTL = 0x%08x", value);
- return 1;
- }
- } while (1);
+ u64 val;
+ int i;
- if (!nodes) {
- printk(KERN_DEBUG "No CPU node configured for IBS");
- return 1;
+ for (i = 0; i < num_counters; ++i) {
+ int virt = op_x86_phys_to_virt(i);
+ if (!reset_value[virt])
+ continue;
+ rdmsrl(msrs->counters[i].addr, val);
+ /* bit is clear if overflowed: */
+ if (val & OP_CTR_OVERFLOW)
+ continue;
+ oprofile_add_sample(regs, virt);
+ wrmsrl(msrs->counters[i].addr, -(u64)reset_value[virt]);
}
-#ifdef CONFIG_NUMA
- /* Sanity check */
- /* Works only for 64bit with proper numa implementation. */
- if (nodes != num_possible_nodes()) {
- printk(KERN_DEBUG "Failed to setup CPU node(s) for IBS, "
- "found: %d, expected %d",
- nodes, num_possible_nodes());
- return 1;
- }
-#endif
- return 0;
+ op_amd_handle_ibs(regs, msrs);
+
+ /* See op_model_ppro.c */
+ return 1;
}
-/* uninitialize the APIC for the IBS interrupts if needed */
-static void clear_ibs_nmi(void)
+static void op_amd_start(struct op_msrs const * const msrs)
{
- if (has_ibs)
- on_each_cpu(apic_clear_ibs_nmi_per_cpu, NULL, 1);
+ u64 val;
+ int i;
+
+ for (i = 0; i < num_counters; ++i) {
+ if (!reset_value[op_x86_phys_to_virt(i)])
+ continue;
+ rdmsrl(msrs->controls[i].addr, val);
+ val |= ARCH_PERFMON_EVENTSEL_ENABLE;
+ wrmsrl(msrs->controls[i].addr, val);
+ }
+
+ op_amd_start_ibs();
}
-/* initialize the APIC for the IBS interrupts if available */
-static void ibs_init(void)
+static void op_amd_stop(struct op_msrs const * const msrs)
{
- has_ibs = boot_cpu_has(X86_FEATURE_IBS);
-
- if (!has_ibs)
- return;
+ u64 val;
+ int i;
- if (init_ibs_nmi()) {
- has_ibs = 0;
- return;
+ /*
+ * Subtle: stop on all counters to avoid race with setting our
+ * pm callback
+ */
+ for (i = 0; i < num_counters; ++i) {
+ if (!reset_value[op_x86_phys_to_virt(i)])
+ continue;
+ rdmsrl(msrs->controls[i].addr, val);
+ val &= ~ARCH_PERFMON_EVENTSEL_ENABLE;
+ wrmsrl(msrs->controls[i].addr, val);
}
- printk(KERN_INFO "oprofile: AMD IBS detected\n");
+ op_amd_stop_ibs();
}
-static void ibs_exit(void)
+/*
+ * check and reserve APIC extended interrupt LVT offset for IBS if
+ * available
+ */
+
+static void init_ibs(void)
{
- if (!has_ibs)
+ ibs_caps = get_ibs_caps();
+
+ if (!ibs_caps)
return;
- clear_ibs_nmi();
+ printk(KERN_INFO "oprofile: AMD IBS detected (0x%08x)\n", ibs_caps);
}
-static int (*create_arch_files)(struct super_block *sb, struct dentry *root);
+static int (*create_arch_files)(struct dentry *root);
-static int setup_ibs_files(struct super_block *sb, struct dentry *root)
+static int setup_ibs_files(struct dentry *root)
{
struct dentry *dir;
int ret = 0;
/* architecture specific files */
if (create_arch_files)
- ret = create_arch_files(sb, root);
+ ret = create_arch_files(root);
if (ret)
return ret;
- if (!has_ibs)
+ if (!ibs_caps)
return ret;
/* model specific files */
/* setup some reasonable defaults */
+ memset(&ibs_config, 0, sizeof(ibs_config));
ibs_config.max_cnt_fetch = 250000;
- ibs_config.fetch_enabled = 0;
ibs_config.max_cnt_op = 250000;
- ibs_config.op_enabled = 0;
- ibs_config.dispatched_ops = 1;
-
- dir = oprofilefs_mkdir(sb, root, "ibs_fetch");
- oprofilefs_create_ulong(sb, dir, "enable",
- &ibs_config.fetch_enabled);
- oprofilefs_create_ulong(sb, dir, "max_count",
- &ibs_config.max_cnt_fetch);
- oprofilefs_create_ulong(sb, dir, "rand_enable",
- &ibs_config.rand_en);
-
- dir = oprofilefs_mkdir(sb, root, "ibs_op");
- oprofilefs_create_ulong(sb, dir, "enable",
- &ibs_config.op_enabled);
- oprofilefs_create_ulong(sb, dir, "max_count",
- &ibs_config.max_cnt_op);
- oprofilefs_create_ulong(sb, dir, "dispatched_ops",
- &ibs_config.dispatched_ops);
+
+ if (ibs_caps & IBS_CAPS_FETCHSAM) {
+ dir = oprofilefs_mkdir(root, "ibs_fetch");
+ oprofilefs_create_ulong(dir, "enable",
+ &ibs_config.fetch_enabled);
+ oprofilefs_create_ulong(dir, "max_count",
+ &ibs_config.max_cnt_fetch);
+ oprofilefs_create_ulong(dir, "rand_enable",
+ &ibs_config.rand_en);
+ }
+
+ if (ibs_caps & IBS_CAPS_OPSAM) {
+ dir = oprofilefs_mkdir(root, "ibs_op");
+ oprofilefs_create_ulong(dir, "enable",
+ &ibs_config.op_enabled);
+ oprofilefs_create_ulong(dir, "max_count",
+ &ibs_config.max_cnt_op);
+ if (ibs_caps & IBS_CAPS_OPCNT)
+ oprofilefs_create_ulong(dir, "dispatched_ops",
+ &ibs_config.dispatched_ops);
+ if (ibs_caps & IBS_CAPS_BRNTRGT)
+ oprofilefs_create_ulong(dir, "branch_target",
+ &ibs_config.branch_target);
+ }
return 0;
}
+struct op_x86_model_spec op_amd_spec;
+
static int op_amd_init(struct oprofile_operations *ops)
{
- ibs_init();
+ init_ibs();
create_arch_files = ops->create_files;
ops->create_files = setup_ibs_files;
- return 0;
-}
-static void op_amd_exit(void)
-{
- ibs_exit();
-}
-
-#else
+ if (boot_cpu_data.x86 == 0x15) {
+ num_counters = AMD64_NUM_COUNTERS_CORE;
+ } else {
+ num_counters = AMD64_NUM_COUNTERS;
+ }
-/* no IBS support */
+ op_amd_spec.num_counters = num_counters;
+ op_amd_spec.num_controls = num_counters;
+ op_amd_spec.num_virt_counters = max(num_counters, NUM_VIRT_COUNTERS);
-static int op_amd_init(struct oprofile_operations *ops)
-{
return 0;
}
-static void op_amd_exit(void) {}
-
-#endif /* CONFIG_OPROFILE_IBS */
-
-struct op_x86_model_spec const op_amd_spec = {
+struct op_x86_model_spec op_amd_spec = {
+ /* num_counters/num_controls filled in at runtime */
+ .reserved = MSR_AMD_EVENTSEL_RESERVED,
+ .event_mask = OP_EVENT_MASK,
.init = op_amd_init,
- .exit = op_amd_exit,
- .num_counters = NUM_COUNTERS,
- .num_controls = NUM_CONTROLS,
.fill_in_addresses = &op_amd_fill_in_addresses,
.setup_ctrs = &op_amd_setup_ctrs,
.check_ctrs = &op_amd_check_ctrs,
.start = &op_amd_start,
.stop = &op_amd_stop,
- .shutdown = &op_amd_shutdown
+ .shutdown = &op_amd_shutdown,
+#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
+ .switch_ctrl = &op_mux_switch_ctrl,
+#endif
};
diff --git a/arch/x86/oprofile/op_model_p4.c b/arch/x86/oprofile/op_model_p4.c
index 4c4a51c90bc..98ab13058f8 100644
--- a/arch/x86/oprofile/op_model_p4.c
+++ b/arch/x86/oprofile/op_model_p4.c
@@ -11,7 +11,7 @@
#include <linux/oprofile.h>
#include <linux/smp.h>
#include <linux/ptrace.h>
-#include <linux/nmi.h>
+#include <asm/nmi.h>
#include <asm/msr.h>
#include <asm/fixmap.h>
#include <asm/apic.h>
@@ -32,6 +32,8 @@
#define NUM_CCCRS_HT2 9
#define NUM_CONTROLS_HT2 (NUM_ESCRS_HT2 + NUM_CCCRS_HT2)
+#define OP_CTR_OVERFLOW (1ULL<<31)
+
static unsigned int num_counters = NUM_COUNTERS_NON_HT;
static unsigned int num_controls = NUM_CONTROLS_NON_HT;
@@ -48,7 +50,7 @@ static inline void setup_num_counters(void)
#endif
}
-static int inline addr_increment(void)
+static inline int addr_increment(void)
{
#ifdef CONFIG_SMP
return smp_num_siblings == 2 ? 2 : 1;
@@ -350,8 +352,6 @@ static struct p4_event_binding p4_events[NUM_EVENTS] = {
#define ESCR_SET_OS_1(escr, os) ((escr) |= (((os) & 1) << 1))
#define ESCR_SET_EVENT_SELECT(escr, sel) ((escr) |= (((sel) & 0x3f) << 25))
#define ESCR_SET_EVENT_MASK(escr, mask) ((escr) |= (((mask) & 0xffff) << 9))
-#define ESCR_READ(escr, high, ev, i) do {rdmsr(ev->bindings[(i)].escr_address, (escr), (high)); } while (0)
-#define ESCR_WRITE(escr, high, ev, i) do {wrmsr(ev->bindings[(i)].escr_address, (escr), (high)); } while (0)
#define CCCR_RESERVED_BITS 0x38030FFF
#define CCCR_CLEAR(cccr) ((cccr) &= CCCR_RESERVED_BITS)
@@ -361,17 +361,9 @@ static struct p4_event_binding p4_events[NUM_EVENTS] = {
#define CCCR_SET_PMI_OVF_1(cccr) ((cccr) |= (1<<27))
#define CCCR_SET_ENABLE(cccr) ((cccr) |= (1<<12))
#define CCCR_SET_DISABLE(cccr) ((cccr) &= ~(1<<12))
-#define CCCR_READ(low, high, i) do {rdmsr(p4_counters[(i)].cccr_address, (low), (high)); } while (0)
-#define CCCR_WRITE(low, high, i) do {wrmsr(p4_counters[(i)].cccr_address, (low), (high)); } while (0)
#define CCCR_OVF_P(cccr) ((cccr) & (1U<<31))
#define CCCR_CLEAR_OVF(cccr) ((cccr) &= (~(1U<<31)))
-#define CTRL_IS_RESERVED(msrs, c) (msrs->controls[(c)].addr ? 1 : 0)
-#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)
-#define CTR_READ(l, h, i) do {rdmsr(p4_counters[(i)].counter_address, (l), (h)); } while (0)
-#define CTR_WRITE(l, i) do {wrmsr(p4_counters[(i)].counter_address, -(u32)(l), -1); } while (0)
-#define CTR_OVERFLOW_P(ctr) (!((ctr) & 0x80000000))
-
/* this assigns a "stagger" to the current CPU, which is used throughout
the code in this module as an extra array offset, to select the "even"
@@ -380,7 +372,7 @@ static unsigned int get_stagger(void)
{
#ifdef CONFIG_SMP
int cpu = smp_processor_id();
- return (cpu != first_cpu(per_cpu(cpu_sibling_map, cpu)));
+ return cpu != cpumask_first(__get_cpu_var(cpu_sibling_map));
#endif
return 0;
}
@@ -393,8 +385,26 @@ static unsigned int get_stagger(void)
static unsigned long reset_value[NUM_COUNTERS_NON_HT];
+static void p4_shutdown(struct op_msrs const * const msrs)
+{
+ int i;
-static void p4_fill_in_addresses(struct op_msrs * const msrs)
+ for (i = 0; i < num_counters; ++i) {
+ if (msrs->counters[i].addr)
+ release_perfctr_nmi(msrs->counters[i].addr);
+ }
+ /*
+ * some of the control registers are specially reserved in
+ * conjunction with the counter registers (hence the starting offset).
+ * This saves a few bits.
+ */
+ for (i = num_counters; i < num_controls; ++i) {
+ if (msrs->controls[i].addr)
+ release_evntsel_nmi(msrs->controls[i].addr);
+ }
+}
+
+static int p4_fill_in_addresses(struct op_msrs * const msrs)
{
unsigned int i;
unsigned int addr, cccraddr, stag;
@@ -402,12 +412,6 @@ static void p4_fill_in_addresses(struct op_msrs * const msrs)
setup_num_counters();
stag = get_stagger();
- /* initialize some registers */
- for (i = 0; i < num_counters; ++i)
- msrs->counters[i].addr = 0;
- for (i = 0; i < num_controls; ++i)
- msrs->controls[i].addr = 0;
-
/* the counter & cccr registers we pay attention to */
for (i = 0; i < num_counters; ++i) {
addr = p4_counters[VIRT_CTR(stag, i)].counter_address;
@@ -482,6 +486,18 @@ static void p4_fill_in_addresses(struct op_msrs * const msrs)
msrs->controls[i++].addr = MSR_P4_CRU_ESCR5;
}
}
+
+ for (i = 0; i < num_counters; ++i) {
+ if (!counter_config[i].enabled)
+ continue;
+ if (msrs->controls[i].addr)
+ continue;
+ op_x86_warn_reserved(i);
+ p4_shutdown(msrs);
+ return -EBUSY;
+ }
+
+ return 0;
}
@@ -515,7 +531,7 @@ static void pmc_setup_one_p4_counter(unsigned int ctr)
if (ev->bindings[i].virt_counter & counter_bit) {
/* modify ESCR */
- ESCR_READ(escr, high, ev, i);
+ rdmsr(ev->bindings[i].escr_address, escr, high);
ESCR_CLEAR(escr);
if (stag == 0) {
ESCR_SET_USR_0(escr, counter_config[ctr].user);
@@ -526,10 +542,11 @@ static void pmc_setup_one_p4_counter(unsigned int ctr)
}
ESCR_SET_EVENT_SELECT(escr, ev->event_select);
ESCR_SET_EVENT_MASK(escr, counter_config[ctr].unit_mask);
- ESCR_WRITE(escr, high, ev, i);
+ wrmsr(ev->bindings[i].escr_address, escr, high);
/* modify CCCR */
- CCCR_READ(cccr, high, VIRT_CTR(stag, ctr));
+ rdmsr(p4_counters[VIRT_CTR(stag, ctr)].cccr_address,
+ cccr, high);
CCCR_CLEAR(cccr);
CCCR_SET_REQUIRED_BITS(cccr);
CCCR_SET_ESCR_SELECT(cccr, ev->escr_select);
@@ -537,7 +554,8 @@ static void pmc_setup_one_p4_counter(unsigned int ctr)
CCCR_SET_PMI_OVF_0(cccr);
else
CCCR_SET_PMI_OVF_1(cccr);
- CCCR_WRITE(cccr, high, VIRT_CTR(stag, ctr));
+ wrmsr(p4_counters[VIRT_CTR(stag, ctr)].cccr_address,
+ cccr, high);
return;
}
}
@@ -548,7 +566,8 @@ static void pmc_setup_one_p4_counter(unsigned int ctr)
}
-static void p4_setup_ctrs(struct op_msrs const * const msrs)
+static void p4_setup_ctrs(struct op_x86_model_spec const *model,
+ struct op_msrs const * const msrs)
{
unsigned int i;
unsigned int low, high;
@@ -563,8 +582,8 @@ static void p4_setup_ctrs(struct op_msrs const * const msrs)
}
/* clear the cccrs we will use */
- for (i = 0 ; i < num_counters ; i++) {
- if (unlikely(!CTRL_IS_RESERVED(msrs, i)))
+ for (i = 0; i < num_counters; i++) {
+ if (unlikely(!msrs->controls[i].addr))
continue;
rdmsr(p4_counters[VIRT_CTR(stag, i)].cccr_address, low, high);
CCCR_CLEAR(low);
@@ -574,17 +593,18 @@ static void p4_setup_ctrs(struct op_msrs const * const msrs)
/* clear all escrs (including those outside our concern) */
for (i = num_counters; i < num_controls; i++) {
- if (unlikely(!CTRL_IS_RESERVED(msrs, i)))
+ if (unlikely(!msrs->controls[i].addr))
continue;
wrmsr(msrs->controls[i].addr, 0, 0);
}
/* setup all counters */
- for (i = 0 ; i < num_counters ; ++i) {
- if ((counter_config[i].enabled) && (CTRL_IS_RESERVED(msrs, i))) {
+ for (i = 0; i < num_counters; ++i) {
+ if (counter_config[i].enabled && msrs->controls[i].addr) {
reset_value[i] = counter_config[i].count;
pmc_setup_one_p4_counter(i);
- CTR_WRITE(counter_config[i].count, VIRT_CTR(stag, i));
+ wrmsrl(p4_counters[VIRT_CTR(stag, i)].counter_address,
+ -(u64)counter_config[i].count);
} else {
reset_value[i] = 0;
}
@@ -624,14 +644,16 @@ static int p4_check_ctrs(struct pt_regs * const regs,
real = VIRT_CTR(stag, i);
- CCCR_READ(low, high, real);
- CTR_READ(ctr, high, real);
- if (CCCR_OVF_P(low) || CTR_OVERFLOW_P(ctr)) {
+ rdmsr(p4_counters[real].cccr_address, low, high);
+ rdmsr(p4_counters[real].counter_address, ctr, high);
+ if (CCCR_OVF_P(low) || !(ctr & OP_CTR_OVERFLOW)) {
oprofile_add_sample(regs, i);
- CTR_WRITE(reset_value[i], real);
+ wrmsrl(p4_counters[real].counter_address,
+ -(u64)reset_value[i]);
CCCR_CLEAR_OVF(low);
- CCCR_WRITE(low, high, real);
- CTR_WRITE(reset_value[i], real);
+ wrmsr(p4_counters[real].cccr_address, low, high);
+ wrmsrl(p4_counters[real].counter_address,
+ -(u64)reset_value[i]);
}
}
@@ -653,9 +675,9 @@ static void p4_start(struct op_msrs const * const msrs)
for (i = 0; i < num_counters; ++i) {
if (!reset_value[i])
continue;
- CCCR_READ(low, high, VIRT_CTR(stag, i));
+ rdmsr(p4_counters[VIRT_CTR(stag, i)].cccr_address, low, high);
CCCR_SET_ENABLE(low);
- CCCR_WRITE(low, high, VIRT_CTR(stag, i));
+ wrmsr(p4_counters[VIRT_CTR(stag, i)].cccr_address, low, high);
}
}
@@ -670,34 +692,14 @@ static void p4_stop(struct op_msrs const * const msrs)
for (i = 0; i < num_counters; ++i) {
if (!reset_value[i])
continue;
- CCCR_READ(low, high, VIRT_CTR(stag, i));
+ rdmsr(p4_counters[VIRT_CTR(stag, i)].cccr_address, low, high);
CCCR_SET_DISABLE(low);
- CCCR_WRITE(low, high, VIRT_CTR(stag, i));
- }
-}
-
-static void p4_shutdown(struct op_msrs const * const msrs)
-{
- int i;
-
- for (i = 0 ; i < num_counters ; ++i) {
- if (CTR_IS_RESERVED(msrs, i))
- release_perfctr_nmi(msrs->counters[i].addr);
- }
- /*
- * some of the control registers are specially reserved in
- * conjunction with the counter registers (hence the starting offset).
- * This saves a few bits.
- */
- for (i = num_counters ; i < num_controls ; ++i) {
- if (CTRL_IS_RESERVED(msrs, i))
- release_evntsel_nmi(msrs->controls[i].addr);
+ wrmsr(p4_counters[VIRT_CTR(stag, i)].cccr_address, low, high);
}
}
-
#ifdef CONFIG_SMP
-struct op_x86_model_spec const op_p4_ht2_spec = {
+struct op_x86_model_spec op_p4_ht2_spec = {
.num_counters = NUM_COUNTERS_HT2,
.num_controls = NUM_CONTROLS_HT2,
.fill_in_addresses = &p4_fill_in_addresses,
@@ -709,7 +711,7 @@ struct op_x86_model_spec const op_p4_ht2_spec = {
};
#endif
-struct op_x86_model_spec const op_p4_spec = {
+struct op_x86_model_spec op_p4_spec = {
.num_counters = NUM_COUNTERS_NON_HT,
.num_controls = NUM_CONTROLS_NON_HT,
.fill_in_addresses = &p4_fill_in_addresses,
diff --git a/arch/x86/oprofile/op_model_ppro.c b/arch/x86/oprofile/op_model_ppro.c
index 10131fbdaad..d90528ea541 100644
--- a/arch/x86/oprofile/op_model_ppro.c
+++ b/arch/x86/oprofile/op_model_ppro.c
@@ -10,6 +10,7 @@
* @author Philippe Elie
* @author Graydon Hoare
* @author Andi Kleen
+ * @author Robert Richter <robert.richter@amd.com>
*/
#include <linux/oprofile.h>
@@ -18,7 +19,6 @@
#include <asm/msr.h>
#include <asm/apic.h>
#include <asm/nmi.h>
-#include <asm/intel_arch_perfmon.h>
#include "op_x86_model.h"
#include "op_counter.h"
@@ -26,55 +26,55 @@
static int num_counters = 2;
static int counter_width = 32;
-#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)
-#define CTR_OVERFLOWED(n) (!((n) & (1ULL<<(counter_width-1))))
+#define MSR_PPRO_EVENTSEL_RESERVED ((0xFFFFFFFFULL<<32)|(1ULL<<21))
-#define CTRL_IS_RESERVED(msrs, c) (msrs->controls[(c)].addr ? 1 : 0)
-#define CTRL_READ(l, h, msrs, c) do {rdmsr((msrs->controls[(c)].addr), (l), (h)); } while (0)
-#define CTRL_WRITE(l, h, msrs, c) do {wrmsr((msrs->controls[(c)].addr), (l), (h)); } while (0)
-#define CTRL_SET_ACTIVE(n) (n |= (1<<22))
-#define CTRL_SET_INACTIVE(n) (n &= ~(1<<22))
-#define CTRL_CLEAR(x) (x &= (1<<21))
-#define CTRL_SET_ENABLE(val) (val |= 1<<20)
-#define CTRL_SET_USR(val, u) (val |= ((u & 1) << 16))
-#define CTRL_SET_KERN(val, k) (val |= ((k & 1) << 17))
-#define CTRL_SET_UM(val, m) (val |= (m << 8))
-#define CTRL_SET_EVENT(val, e) (val |= e)
+static u64 reset_value[OP_MAX_COUNTER];
-static u64 *reset_value;
-
-static void ppro_fill_in_addresses(struct op_msrs * const msrs)
+static void ppro_shutdown(struct op_msrs const * const msrs)
{
int i;
- for (i = 0; i < num_counters; i++) {
- if (reserve_perfctr_nmi(MSR_P6_PERFCTR0 + i))
- msrs->counters[i].addr = MSR_P6_PERFCTR0 + i;
- else
- msrs->counters[i].addr = 0;
+ for (i = 0; i < num_counters; ++i) {
+ if (!msrs->counters[i].addr)
+ continue;
+ release_perfctr_nmi(MSR_P6_PERFCTR0 + i);
+ release_evntsel_nmi(MSR_P6_EVNTSEL0 + i);
}
+}
+
+static int ppro_fill_in_addresses(struct op_msrs * const msrs)
+{
+ int i;
for (i = 0; i < num_counters; i++) {
- if (reserve_evntsel_nmi(MSR_P6_EVNTSEL0 + i))
- msrs->controls[i].addr = MSR_P6_EVNTSEL0 + i;
- else
- msrs->controls[i].addr = 0;
+ if (!reserve_perfctr_nmi(MSR_P6_PERFCTR0 + i))
+ goto fail;
+ if (!reserve_evntsel_nmi(MSR_P6_EVNTSEL0 + i)) {
+ release_perfctr_nmi(MSR_P6_PERFCTR0 + i);
+ goto fail;
+ }
+ /* both registers must be reserved */
+ msrs->counters[i].addr = MSR_P6_PERFCTR0 + i;
+ msrs->controls[i].addr = MSR_P6_EVNTSEL0 + i;
+ continue;
+ fail:
+ if (!counter_config[i].enabled)
+ continue;
+ op_x86_warn_reserved(i);
+ ppro_shutdown(msrs);
+ return -EBUSY;
}
+
+ return 0;
}
-static void ppro_setup_ctrs(struct op_msrs const * const msrs)
+static void ppro_setup_ctrs(struct op_x86_model_spec const *model,
+ struct op_msrs const * const msrs)
{
- unsigned int low, high;
+ u64 val;
int i;
- if (!reset_value) {
- reset_value = kmalloc(sizeof(reset_value[0]) * num_counters,
- GFP_ATOMIC);
- if (!reset_value)
- return;
- }
-
if (cpu_has_arch_perfmon) {
union cpuid10_eax eax;
eax.full = cpuid_eax(0xa);
@@ -84,8 +84,8 @@ static void ppro_setup_ctrs(struct op_msrs const * const msrs)
* counter width:
*/
if (!(eax.split.version_id == 0 &&
- current_cpu_data.x86 == 6 &&
- current_cpu_data.x86_model == 15)) {
+ __this_cpu_read(cpu_info.x86) == 6 &&
+ __this_cpu_read(cpu_info.x86_model) == 15)) {
if (counter_width < eax.split.bit_width)
counter_width = eax.split.bit_width;
@@ -93,36 +93,30 @@ static void ppro_setup_ctrs(struct op_msrs const * const msrs)
}
/* clear all counters */
- for (i = 0 ; i < num_counters; ++i) {
- if (unlikely(!CTRL_IS_RESERVED(msrs, i)))
- continue;
- CTRL_READ(low, high, msrs, i);
- CTRL_CLEAR(low);
- CTRL_WRITE(low, high, msrs, i);
- }
-
- /* avoid a false detection of ctr overflows in NMI handler */
for (i = 0; i < num_counters; ++i) {
- if (unlikely(!CTR_IS_RESERVED(msrs, i)))
+ if (!msrs->controls[i].addr)
continue;
+ rdmsrl(msrs->controls[i].addr, val);
+ if (val & ARCH_PERFMON_EVENTSEL_ENABLE)
+ op_x86_warn_in_use(i);
+ val &= model->reserved;
+ wrmsrl(msrs->controls[i].addr, val);
+ /*
+ * avoid a false detection of ctr overflows in NMI *
+ * handler
+ */
wrmsrl(msrs->counters[i].addr, -1LL);
}
/* enable active counters */
for (i = 0; i < num_counters; ++i) {
- if ((counter_config[i].enabled) && (CTR_IS_RESERVED(msrs, i))) {
+ if (counter_config[i].enabled && msrs->counters[i].addr) {
reset_value[i] = counter_config[i].count;
-
wrmsrl(msrs->counters[i].addr, -reset_value[i]);
-
- CTRL_READ(low, high, msrs, i);
- CTRL_CLEAR(low);
- CTRL_SET_ENABLE(low);
- CTRL_SET_USR(low, counter_config[i].user);
- CTRL_SET_KERN(low, counter_config[i].kernel);
- CTRL_SET_UM(low, counter_config[i].unit_mask);
- CTRL_SET_EVENT(low, counter_config[i].event);
- CTRL_WRITE(low, high, msrs, i);
+ rdmsrl(msrs->controls[i].addr, val);
+ val &= model->reserved;
+ val |= op_x86_get_ctrl(model, &counter_config[i]);
+ wrmsrl(msrs->controls[i].addr, val);
} else {
reset_value[i] = 0;
}
@@ -136,14 +130,14 @@ static int ppro_check_ctrs(struct pt_regs * const regs,
u64 val;
int i;
- for (i = 0 ; i < num_counters; ++i) {
+ for (i = 0; i < num_counters; ++i) {
if (!reset_value[i])
continue;
rdmsrl(msrs->counters[i].addr, val);
- if (CTR_OVERFLOWED(val)) {
- oprofile_add_sample(regs, i);
- wrmsrl(msrs->counters[i].addr, -reset_value[i]);
- }
+ if (val & (1ULL << (counter_width - 1)))
+ continue;
+ oprofile_add_sample(regs, i);
+ wrmsrl(msrs->counters[i].addr, -reset_value[i]);
}
/* Only P6 based Pentium M need to re-unmask the apic vector but it
@@ -163,16 +157,14 @@ static int ppro_check_ctrs(struct pt_regs * const regs,
static void ppro_start(struct op_msrs const * const msrs)
{
- unsigned int low, high;
+ u64 val;
int i;
- if (!reset_value)
- return;
for (i = 0; i < num_counters; ++i) {
if (reset_value[i]) {
- CTRL_READ(low, high, msrs, i);
- CTRL_SET_ACTIVE(low);
- CTRL_WRITE(low, high, msrs, i);
+ rdmsrl(msrs->controls[i].addr, val);
+ val |= ARCH_PERFMON_EVENTSEL_ENABLE;
+ wrmsrl(msrs->controls[i].addr, val);
}
}
}
@@ -180,42 +172,22 @@ static void ppro_start(struct op_msrs const * const msrs)
static void ppro_stop(struct op_msrs const * const msrs)
{
- unsigned int low, high;
+ u64 val;
int i;
- if (!reset_value)
- return;
for (i = 0; i < num_counters; ++i) {
if (!reset_value[i])
continue;
- CTRL_READ(low, high, msrs, i);
- CTRL_SET_INACTIVE(low);
- CTRL_WRITE(low, high, msrs, i);
+ rdmsrl(msrs->controls[i].addr, val);
+ val &= ~ARCH_PERFMON_EVENTSEL_ENABLE;
+ wrmsrl(msrs->controls[i].addr, val);
}
}
-static void ppro_shutdown(struct op_msrs const * const msrs)
-{
- int i;
-
- for (i = 0 ; i < num_counters ; ++i) {
- if (CTR_IS_RESERVED(msrs, i))
- release_perfctr_nmi(MSR_P6_PERFCTR0 + i);
- }
- for (i = 0 ; i < num_counters ; ++i) {
- if (CTRL_IS_RESERVED(msrs, i))
- release_evntsel_nmi(MSR_P6_EVNTSEL0 + i);
- }
- if (reset_value) {
- kfree(reset_value);
- reset_value = NULL;
- }
-}
-
-
struct op_x86_model_spec op_ppro_spec = {
- .num_counters = 2, /* can be overriden */
- .num_controls = 2, /* dito */
+ .num_counters = 2,
+ .num_controls = 2,
+ .reserved = MSR_PPRO_EVENTSEL_RESERVED,
.fill_in_addresses = &ppro_fill_in_addresses,
.setup_ctrs = &ppro_setup_ctrs,
.check_ctrs = &ppro_check_ctrs,
@@ -233,29 +205,35 @@ struct op_x86_model_spec op_ppro_spec = {
* the specific CPU.
*/
-void arch_perfmon_setup_counters(void)
+static void arch_perfmon_setup_counters(void)
{
union cpuid10_eax eax;
eax.full = cpuid_eax(0xa);
/* Workaround for BIOS bugs in 6/15. Taken from perfmon2 */
- if (eax.split.version_id == 0 && current_cpu_data.x86 == 6 &&
- current_cpu_data.x86_model == 15) {
+ if (eax.split.version_id == 0 && __this_cpu_read(cpu_info.x86) == 6 &&
+ __this_cpu_read(cpu_info.x86_model) == 15) {
eax.split.version_id = 2;
eax.split.num_counters = 2;
eax.split.bit_width = 40;
}
- num_counters = eax.split.num_counters;
+ num_counters = min((int)eax.split.num_counters, OP_MAX_COUNTER);
op_arch_perfmon_spec.num_counters = num_counters;
op_arch_perfmon_spec.num_controls = num_counters;
- op_ppro_spec.num_counters = num_counters;
- op_ppro_spec.num_controls = num_counters;
+}
+
+static int arch_perfmon_init(struct oprofile_operations *ignore)
+{
+ arch_perfmon_setup_counters();
+ return 0;
}
struct op_x86_model_spec op_arch_perfmon_spec = {
+ .reserved = MSR_PPRO_EVENTSEL_RESERVED,
+ .init = &arch_perfmon_init,
/* num_counters/num_controls filled in at runtime */
.fill_in_addresses = &ppro_fill_in_addresses,
/* user space does the cpuid check for available events */
diff --git a/arch/x86/oprofile/op_x86_model.h b/arch/x86/oprofile/op_x86_model.h
index 825e79064d6..71e8a67337e 100644
--- a/arch/x86/oprofile/op_x86_model.h
+++ b/arch/x86/oprofile/op_x86_model.h
@@ -6,51 +6,85 @@
* @remark Read the file COPYING
*
* @author Graydon Hoare
+ * @author Robert Richter <robert.richter@amd.com>
*/
#ifndef OP_X86_MODEL_H
#define OP_X86_MODEL_H
-struct op_saved_msr {
- unsigned int high;
- unsigned int low;
-};
+#include <asm/types.h>
+#include <asm/perf_event.h>
struct op_msr {
- unsigned long addr;
- struct op_saved_msr saved;
+ unsigned long addr;
+ u64 saved;
};
struct op_msrs {
struct op_msr *counters;
struct op_msr *controls;
+ struct op_msr *multiplex;
};
struct pt_regs;
+struct oprofile_operations;
+
/* The model vtable abstracts the differences between
* various x86 CPU models' perfctr support.
*/
struct op_x86_model_spec {
- int (*init)(struct oprofile_operations *ops);
- void (*exit)(void);
- unsigned int num_counters;
- unsigned int num_controls;
- void (*fill_in_addresses)(struct op_msrs * const msrs);
- void (*setup_ctrs)(struct op_msrs const * const msrs);
- int (*check_ctrs)(struct pt_regs * const regs,
- struct op_msrs const * const msrs);
- void (*start)(struct op_msrs const * const msrs);
- void (*stop)(struct op_msrs const * const msrs);
- void (*shutdown)(struct op_msrs const * const msrs);
+ unsigned int num_counters;
+ unsigned int num_controls;
+ unsigned int num_virt_counters;
+ u64 reserved;
+ u16 event_mask;
+ int (*init)(struct oprofile_operations *ops);
+ int (*fill_in_addresses)(struct op_msrs * const msrs);
+ void (*setup_ctrs)(struct op_x86_model_spec const *model,
+ struct op_msrs const * const msrs);
+ int (*check_ctrs)(struct pt_regs * const regs,
+ struct op_msrs const * const msrs);
+ void (*start)(struct op_msrs const * const msrs);
+ void (*stop)(struct op_msrs const * const msrs);
+ void (*shutdown)(struct op_msrs const * const msrs);
+#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
+ void (*switch_ctrl)(struct op_x86_model_spec const *model,
+ struct op_msrs const * const msrs);
+#endif
};
+struct op_counter_config;
+
+static inline void op_x86_warn_in_use(int counter)
+{
+ /*
+ * The warning indicates an already running counter. If
+ * oprofile doesn't collect data, then try using a different
+ * performance counter on your platform to monitor the desired
+ * event. Delete counter #%d from the desired event by editing
+ * the /usr/share/oprofile/%s/<cpu>/events file. If the event
+ * cannot be monitored by any other counter, contact your
+ * hardware or BIOS vendor.
+ */
+ pr_warning("oprofile: counter #%d on cpu #%d may already be used\n",
+ counter, smp_processor_id());
+}
+
+static inline void op_x86_warn_reserved(int counter)
+{
+ pr_warning("oprofile: counter #%d is already reserved\n", counter);
+}
+
+extern u64 op_x86_get_ctrl(struct op_x86_model_spec const *model,
+ struct op_counter_config *counter_config);
+extern int op_x86_phys_to_virt(int phys);
+extern int op_x86_virt_to_phys(int virt);
+
extern struct op_x86_model_spec op_ppro_spec;
-extern struct op_x86_model_spec const op_p4_spec;
-extern struct op_x86_model_spec const op_p4_ht2_spec;
-extern struct op_x86_model_spec const op_amd_spec;
+extern struct op_x86_model_spec op_p4_spec;
+extern struct op_x86_model_spec op_p4_ht2_spec;
+extern struct op_x86_model_spec op_amd_spec;
extern struct op_x86_model_spec op_arch_perfmon_spec;
-extern void arch_perfmon_setup_counters(void);
-
#endif /* OP_X86_MODEL_H */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 03:57:09 +0000