arch: x86: Remove CONFIG_OPROFILE support

The "oprofile" user-space tools don't use the kernel OPROFILE support
any more, and haven't in a long time. User-space has been converted to
the perf interfaces.

Remove the old oprofile's architecture specific support.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Robert Richter <rric@kernel.org>
Acked-by: William Cohen <wcohen@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

13 files changed, 1 insertions, 2602 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 21f851179ff0..67ba48082932 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -206,7 +206,6 @@ config X86
 	select HAVE_MOVE_PMD
 	select HAVE_MOVE_PUD
 	select HAVE_NMI
-	select HAVE_OPROFILE
 	select HAVE_OPTPROBES
 	select HAVE_PCSPKR_PLATFORM
 	select HAVE_PERF_EVENTS
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 7116da3980be..47e61e623e60 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -229,9 +229,6 @@ core-y += arch/x86/
 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
 drivers-$(CONFIG_PCI)            += arch/x86/pci/
 
-# must be linked after kernel/
-drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
-
 # suspend and hibernation support
 drivers-$(CONFIG_PM) += arch/x86/power/
 
diff --git a/arch/x86/include/asm/nmi.h b/arch/x86/include/asm/nmi.h
index 9d5d949e662e..1cb9c17a4cb4 100644
--- a/arch/x86/include/asm/nmi.h
+++ b/arch/x86/include/asm/nmi.h
@@ -9,7 +9,6 @@
 
 #ifdef CONFIG_X86_LOCAL_APIC
 
-extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
 extern int reserve_perfctr_nmi(unsigned int);
 extern void release_perfctr_nmi(unsigned int);
 extern int reserve_evntsel_nmi(unsigned int);
diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c
index a5ee607a3b89..3ef5868ac588 100644
--- a/arch/x86/kernel/cpu/perfctr-watchdog.c
+++ b/arch/x86/kernel/cpu/perfctr-watchdog.c
@@ -3,7 +3,7 @@
  * local apic based NMI watchdog for various CPUs.
  *
  * This file also handles reservation of performance counters for coordination
- * with other users (like oprofile).
+ * with other users.
  *
  * Note that these events normally don't tick when the CPU idles. This means
  * the frequency varies with CPU load.
@@ -105,15 +105,6 @@ static inline unsigned int nmi_evntsel_msr_to_bit(unsigned int msr)
 
 }
 
-/* checks for a bit availability (hack for oprofile) */
-int avail_to_resrv_perfctr_nmi_bit(unsigned int counter)
-{
-	BUG_ON(counter > NMI_MAX_COUNTER_BITS);
-
-	return !test_bit(counter, perfctr_nmi_owner);
-}
-EXPORT_SYMBOL(avail_to_resrv_perfctr_nmi_bit);
-
 int reserve_perfctr_nmi(unsigned int msr)
 {
 	unsigned int counter;
diff --git a/arch/x86/oprofile/Makefile b/arch/x86/oprofile/Makefile
deleted file mode 100644
index 4d49b5a27025..000000000000
--- a/arch/x86/oprofile/Makefile
+++ /dev/null
@@ -1,12 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_OPROFILE) += oprofile.o
-
-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 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
diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
deleted file mode 100644
index 1d8391fcca68..000000000000
--- a/arch/x86/oprofile/backtrace.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/**
- * @file backtrace.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- * @author David Smith
- */
-
-#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/stacktrace.h>
-#include <asm/unwind.h>
-
-#ifdef CONFIG_COMPAT
-static struct stack_frame_ia32 *
-dump_user_backtrace_32(struct stack_frame_ia32 *head)
-{
-	/* Also check accessibility of one struct frame_head beyond: */
-	struct stack_frame_ia32 bufhead[2];
-	struct stack_frame_ia32 *fp;
-	unsigned long bytes;
-
-	bytes = copy_from_user_nmi(bufhead, head, sizeof(bufhead));
-	if (bytes != 0)
-		return NULL;
-
-	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;
-
-	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 || user_64bit_mode(regs))
-		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].next_frame)
-		return NULL;
-
-	return bufhead[0].next_frame;
-}
-
-void
-x86_backtrace(struct pt_regs * const regs, unsigned int depth)
-{
-	struct stack_frame *head = (struct stack_frame *)frame_pointer(regs);
-
-	if (!user_mode(regs)) {
-		struct unwind_state state;
-		unsigned long addr;
-
-		if (!depth)
-			return;
-
-		oprofile_add_trace(regs->ip);
-
-		if (!--depth)
-			return;
-
-		for (unwind_start(&state, current, regs, NULL);
-		     !unwind_done(&state); unwind_next_frame(&state)) {
-			addr = unwind_get_return_address(&state);
-			if (!addr)
-				break;
-
-			oprofile_add_trace(addr);
-
-			if (!--depth)
-				break;
-		}
-
-		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
deleted file mode 100644
index 9e138d00ad36..000000000000
--- a/arch/x86/oprofile/init.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/**
- * @file init.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#include <linux/oprofile.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-
-/*
- * We support CPUs that have performance counters like the Pentium Pro
- * with the NMI mode driver.
- */
-
-#ifdef CONFIG_X86_LOCAL_APIC
-extern int op_nmi_init(struct oprofile_operations *ops);
-extern void op_nmi_exit(void);
-#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)
-{
-	ops->backtrace = x86_backtrace;
-	return op_nmi_init(ops);
-}
-
-void oprofile_arch_exit(void)
-{
-	op_nmi_exit();
-}
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
deleted file mode 100644
index a7a7677265b6..000000000000
--- a/arch/x86/oprofile/nmi_int.c
+++ /dev/null
@@ -1,780 +0,0 @@
-/**
- * @file nmi_int.c
- *
- * @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/syscore_ops.h>
-#include <linux/slab.h>
-#include <linux/moduleparam.h>
-#include <linux/kdebug.h>
-#include <linux/cpu.h>
-#include <asm/nmi.h>
-#include <asm/msr.h>
-#include <asm/apic.h>
-
-#include "op_counter.h"
-#include "op_x86_model.h"
-
-static struct op_x86_model_spec *model;
-static DEFINE_PER_CPU(struct op_msrs, cpu_msrs);
-static DEFINE_PER_CPU(unsigned long, saved_lvtpc);
-
-/* must be protected with get_online_cpus()/put_online_cpus(): */
-static int nmi_enabled;
-static int ctr_running;
-
-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)
-{
-	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;
-}
-
-
-static int profile_exceptions_notify(unsigned int val, struct pt_regs *regs)
-{
-	if (ctr_running)
-		model->check_ctrs(regs, this_cpu_ptr(&cpu_msrs));
-	else if (!nmi_enabled)
-		return NMI_DONE;
-	else
-		model->stop(this_cpu_ptr(&cpu_msrs));
-	return NMI_HANDLED;
-}
-
-static void nmi_cpu_save_registers(struct op_msrs *msrs)
-{
-	struct op_msr *counters = msrs->counters;
-	struct op_msr *controls = msrs->controls;
-	unsigned int i;
-
-	for (i = 0; i < model->num_counters; ++i) {
-		if (counters[i].addr)
-			rdmsrl(counters[i].addr, counters[i].saved);
-	}
-
-	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 = this_cpu_ptr(&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 = this_cpu_ptr(&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_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_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;
-	for_each_possible_cpu(i) {
-		kfree(per_cpu(cpu_msrs, i).counters);
-		per_cpu(cpu_msrs, i).counters = NULL;
-		kfree(per_cpu(cpu_msrs, i).controls);
-		per_cpu(cpu_msrs, i).controls = NULL;
-	}
-	nmi_shutdown_mux();
-}
-
-static int allocate_msrs(void)
-{
-	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 = 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 (!nmi_setup_mux())
-		goto fail;
-
-	return 1;
-
-fail:
-	free_msrs();
-	return 0;
-}
-
-static void nmi_cpu_setup(void)
-{
-	int cpu = smp_processor_id();
-	struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);
-
-	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 void nmi_cpu_restore_registers(struct op_msrs *msrs)
-{
-	struct op_msr *counters = msrs->counters;
-	struct op_msr *controls = msrs->controls;
-	unsigned int i;
-
-	for (i = 0; i < model->num_controls; ++i) {
-		if (controls[i].addr)
-			wrmsrl(controls[i].addr, controls[i].saved);
-	}
-
-	for (i = 0; i < model->num_counters; ++i) {
-		if (counters[i].addr)
-			wrmsrl(counters[i].addr, counters[i].saved);
-	}
-}
-
-static void nmi_cpu_shutdown(void)
-{
-	unsigned int v;
-	int cpu = smp_processor_id();
-	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
-	 * power on apic lvt contain a zero vector nr which are legal only for
-	 * NMI delivery mode. So inhibit apic err before restoring lvtpc
-	 */
-	v = apic_read(APIC_LVTERR);
-	apic_write(APIC_LVTERR, v | APIC_LVT_MASKED);
-	apic_write(APIC_LVTPC, per_cpu(saved_lvtpc, cpu));
-	apic_write(APIC_LVTERR, v);
-	nmi_cpu_restore_registers(msrs);
-}
-
-static int nmi_cpu_online(unsigned int cpu)
-{
-	local_irq_disable();
-	if (nmi_enabled)
-		nmi_cpu_setup();
-	if (ctr_running)
-		nmi_cpu_start(NULL);
-	local_irq_enable();
-	return 0;
-}
-
-static int nmi_cpu_down_prep(unsigned int cpu)
-{
-	local_irq_disable();
-	if (ctr_running)
-		nmi_cpu_stop(NULL);
-	if (nmi_enabled)
-		nmi_cpu_shutdown();
-	local_irq_enable();
-	return 0;
-}
-
-static int nmi_create_files(struct dentry *root)
-{
-	unsigned int i;
-
-	for (i = 0; i < model->num_virt_counters; ++i) {
-		struct dentry *dir;
-		char buf[4];
-
-		/* quick little hack to _not_ expose a counter if it is not
-		 * available for use.  This should protect userspace app.
-		 * NOTE:  assumes 1:1 mapping here (that counters are organized
-		 *        sequentially in their struct assignment).
-		 */
-		if (!avail_to_resrv_perfctr_nmi_bit(op_x86_virt_to_phys(i)))
-			continue;
-
-		snprintf(buf,  sizeof(buf), "%d", i);
-		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;
-}
-
-static enum cpuhp_state cpuhp_nmi_online;
-
-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 (!IS_ENABLED(CONFIG_SMP) || !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;
-
-	nmi_enabled = 1;
-	/* make nmi_enabled visible to the nmi handler: */
-	smp_mb();
-	err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "x86/oprofile:online",
-				nmi_cpu_online, nmi_cpu_down_prep);
-	if (err < 0)
-		goto fail_nmi;
-	cpuhp_nmi_online = err;
-	return 0;
-fail_nmi:
-	unregister_nmi_handler(NMI_LOCAL, "oprofile");
-fail:
-	free_msrs();
-	return err;
-}
-
-static void nmi_shutdown(void)
-{
-	struct op_msrs *msrs;
-
-	cpuhp_remove_state(cpuhp_nmi_online);
-	nmi_enabled = 0;
-	ctr_running = 0;
-
-	/* 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(void)
-{
-	/* Only one CPU left, just stop that one */
-	if (nmi_enabled == 1)
-		nmi_cpu_stop(NULL);
-	return 0;
-}
-
-static void nmi_resume(void)
-{
-	if (nmi_enabled == 1)
-		nmi_cpu_start(NULL);
-}
-
-static struct syscore_ops oprofile_syscore_ops = {
-	.resume		= nmi_resume,
-	.suspend	= nmi_suspend,
-};
-
-static void __init init_suspend_resume(void)
-{
-	register_syscore_ops(&oprofile_syscore_ops);
-}
-
-static void exit_suspend_resume(void)
-{
-	unregister_syscore_ops(&oprofile_syscore_ops);
-}
-
-#else
-
-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 (cpu_model > 6 || cpu_model == 5)
-		return 0;
-
-#ifndef CONFIG_SMP
-	*cpu_type = "i386/p4";
-	model = &op_p4_spec;
-	return 1;
-#else
-	switch (smp_num_siblings) {
-	case 1:
-		*cpu_type = "i386/p4";
-		model = &op_p4_spec;
-		return 1;
-
-	case 2:
-		*cpu_type = "i386/p4-ht";
-		model = &op_p4_ht2_spec;
-		return 1;
-	}
-#endif
-
-	printk(KERN_INFO "oprofile: P4 HyperThreading detected with > 2 threads\n");
-	printk(KERN_INFO "oprofile: Reverting to timer mode.\n");
-	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, const 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 && boot_cpu_has(X86_FEATURE_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";
-		break;
-	case 3 ... 5:
-		*cpu_type = "i386/pii";
-		break;
-	case 6 ... 8:
-	case 10 ... 11:
-		*cpu_type = "i386/piii";
-		break;
-	case 9:
-	case 13:
-		*cpu_type = "i386/p6_mobile";
-		break;
-	case 14:
-		*cpu_type = "i386/core";
-		break;
-	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 = spec;
-	return 1;
-}
-
-int __init op_nmi_init(struct oprofile_operations *ops)
-{
-	__u8 vendor = boot_cpu_data.x86_vendor;
-	__u8 family = boot_cpu_data.x86;
-	char *cpu_type = NULL;
-	int ret = 0;
-
-	if (!boot_cpu_has(X86_FEATURE_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) {
-		case 6:
-			cpu_type = "i386/athlon";
-			break;
-		case 0xf:
-			/*
-			 * Actually it could be i386/hammer too, but
-			 * give user space an consistent name.
-			 */
-			cpu_type = "x86-64/hammer";
-			break;
-		case 0x10:
-			cpu_type = "x86-64/family10";
-			break;
-		case 0x11:
-			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:
-		switch (family) {
-			/* Pentium IV */
-		case 0xf:
-			p4_init(&cpu_type);
-			break;
-
-			/* A P6-class processor */
-		case 6:
-			ppro_init(&cpu_type);
-			break;
-
-		default:
-			break;
-		}
-
-		if (cpu_type)
-			break;
-
-		if (!boot_cpu_has(X86_FEATURE_ARCH_PERFMON))
-			return -ENODEV;
-
-		/* use arch perfmon as fallback */
-		cpu_type = "i386/arch_perfmon";
-		model = &op_arch_perfmon_spec;
-		break;
-
-	default:
-		return -ENODEV;
-	}
-
-	/* 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;
-
-	if (model->init)
-		ret = model->init(ops);
-	if (ret)
-		return ret;
-
-	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)
-{
-	exit_suspend_resume();
-}
diff --git a/arch/x86/oprofile/op_counter.h b/arch/x86/oprofile/op_counter.h
deleted file mode 100644
index 0b7b7b179cbe..000000000000
--- a/arch/x86/oprofile/op_counter.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/**
- * @file op_counter.h
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- */
-
-#ifndef OP_COUNTER_H
-#define OP_COUNTER_H
-
-#define OP_MAX_COUNTER 32
-
-/* Per-perfctr configuration as set via
- * oprofilefs.
- */
-struct op_counter_config {
-	unsigned long count;
-	unsigned long enabled;
-	unsigned long event;
-	unsigned long kernel;
-	unsigned long user;
-	unsigned long unit_mask;
-	unsigned long extra;
-};
-
-extern struct op_counter_config counter_config[];
-
-#endif /* OP_COUNTER_H */
diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c
deleted file mode 100644
index 660a83c8287b..000000000000
--- a/arch/x86/oprofile/op_model_amd.c
+++ /dev/null
@@ -1,542 +0,0 @@
-/*
- * @file op_model_amd.c
- * athlon / K7 / K8 / Family 10h model-specific MSR operations
- *
- * @remark Copyright 2002-2009 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- * @author Philippe Elie
- * @author Graydon Hoare
- * @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/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 "op_x86_model.h"
-#include "op_counter.h"
-
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX