perf/x86: Move perf_event_amd_iommu.[ch] .. => x86/events/amd/iommu.[ch]

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/1454947748-28629-5-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

3 files changed, 0 insertions, 542 deletions

diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index dddba2225ccd..2e15d9d63756 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -32,9 +32,6 @@ obj-$(CONFIG_CPU_SUP_UMC_32)		+= umc.o
 
 ifdef CONFIG_PERF_EVENTS
 obj-$(CONFIG_CPU_SUP_AMD)		+= perf_event_amd_uncore.o
-ifdef CONFIG_AMD_IOMMU
-obj-$(CONFIG_CPU_SUP_AMD)		+= perf_event_amd_iommu.o
-endif
 obj-$(CONFIG_CPU_SUP_INTEL)		+= perf_event_p6.o perf_event_knc.o perf_event_p4.o
 obj-$(CONFIG_CPU_SUP_INTEL)		+= perf_event_intel_lbr.o perf_event_intel_ds.o perf_event_intel.o
 obj-$(CONFIG_CPU_SUP_INTEL)		+= perf_event_intel_rapl.o perf_event_intel_cqm.o
diff --git a/arch/x86/kernel/cpu/perf_event_amd_iommu.c b/arch/x86/kernel/cpu/perf_event_amd_iommu.c
deleted file mode 100644
index 97242a9242bd..000000000000
--- a/arch/x86/kernel/cpu/perf_event_amd_iommu.c
+++ /dev/null
@@ -1,499 +0,0 @@
-/*
- * Copyright (C) 2013 Advanced Micro Devices, Inc.
- *
- * Author: Steven Kinney <Steven.Kinney@amd.com>
- * Author: Suravee Suthikulpanit <Suraveee.Suthikulpanit@amd.com>
- *
- * Perf: amd_iommu - AMD IOMMU Performance Counter PMU implementation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/perf_event.h>
-#include <linux/module.h>
-#include <linux/cpumask.h>
-#include <linux/slab.h>
-
-#include "perf_event.h"
-#include "perf_event_amd_iommu.h"
-
-#define COUNTER_SHIFT		16
-
-#define _GET_BANK(ev)       ((u8)(ev->hw.extra_reg.reg >> 8))
-#define _GET_CNTR(ev)       ((u8)(ev->hw.extra_reg.reg))
-
-/* iommu pmu config masks */
-#define _GET_CSOURCE(ev)    ((ev->hw.config & 0xFFULL))
-#define _GET_DEVID(ev)      ((ev->hw.config >> 8)  & 0xFFFFULL)
-#define _GET_PASID(ev)      ((ev->hw.config >> 24) & 0xFFFFULL)
-#define _GET_DOMID(ev)      ((ev->hw.config >> 40) & 0xFFFFULL)
-#define _GET_DEVID_MASK(ev) ((ev->hw.extra_reg.config)  & 0xFFFFULL)
-#define _GET_PASID_MASK(ev) ((ev->hw.extra_reg.config >> 16) & 0xFFFFULL)
-#define _GET_DOMID_MASK(ev) ((ev->hw.extra_reg.config >> 32) & 0xFFFFULL)
-
-static struct perf_amd_iommu __perf_iommu;
-
-struct perf_amd_iommu {
-	struct pmu pmu;
-	u8 max_banks;
-	u8 max_counters;
-	u64 cntr_assign_mask;
-	raw_spinlock_t lock;
-	const struct attribute_group *attr_groups[4];
-};
-
-#define format_group	attr_groups[0]
-#define cpumask_group	attr_groups[1]
-#define events_group	attr_groups[2]
-#define null_group	attr_groups[3]
-
-/*---------------------------------------------
- * sysfs format attributes
- *---------------------------------------------*/
-PMU_FORMAT_ATTR(csource,    "config:0-7");
-PMU_FORMAT_ATTR(devid,      "config:8-23");
-PMU_FORMAT_ATTR(pasid,      "config:24-39");
-PMU_FORMAT_ATTR(domid,      "config:40-55");
-PMU_FORMAT_ATTR(devid_mask, "config1:0-15");
-PMU_FORMAT_ATTR(pasid_mask, "config1:16-31");
-PMU_FORMAT_ATTR(domid_mask, "config1:32-47");
-
-static struct attribute *iommu_format_attrs[] = {
-	&format_attr_csource.attr,
-	&format_attr_devid.attr,
-	&format_attr_pasid.attr,
-	&format_attr_domid.attr,
-	&format_attr_devid_mask.attr,
-	&format_attr_pasid_mask.attr,
-	&format_attr_domid_mask.attr,
-	NULL,
-};
-
-static struct attribute_group amd_iommu_format_group = {
-	.name = "format",
-	.attrs = iommu_format_attrs,
-};
-
-/*---------------------------------------------
- * sysfs events attributes
- *---------------------------------------------*/
-struct amd_iommu_event_desc {
-	struct kobj_attribute attr;
-	const char *event;
-};
-
-static ssize_t _iommu_event_show(struct kobject *kobj,
-				struct kobj_attribute *attr, char *buf)
-{
-	struct amd_iommu_event_desc *event =
-		container_of(attr, struct amd_iommu_event_desc, attr);
-	return sprintf(buf, "%s\n", event->event);
-}
-
-#define AMD_IOMMU_EVENT_DESC(_name, _event)			\
-{								\
-	.attr  = __ATTR(_name, 0444, _iommu_event_show, NULL),	\
-	.event = _event,					\
-}
-
-static struct amd_iommu_event_desc amd_iommu_v2_event_descs[] = {
-	AMD_IOMMU_EVENT_DESC(mem_pass_untrans,        "csource=0x01"),
-	AMD_IOMMU_EVENT_DESC(mem_pass_pretrans,       "csource=0x02"),
-	AMD_IOMMU_EVENT_DESC(mem_pass_excl,           "csource=0x03"),
-	AMD_IOMMU_EVENT_DESC(mem_target_abort,        "csource=0x04"),
-	AMD_IOMMU_EVENT_DESC(mem_trans_total,         "csource=0x05"),
-	AMD_IOMMU_EVENT_DESC(mem_iommu_tlb_pte_hit,   "csource=0x06"),
-	AMD_IOMMU_EVENT_DESC(mem_iommu_tlb_pte_mis,   "csource=0x07"),
-	AMD_IOMMU_EVENT_DESC(mem_iommu_tlb_pde_hit,   "csource=0x08"),
-	AMD_IOMMU_EVENT_DESC(mem_iommu_tlb_pde_mis,   "csource=0x09"),
-	AMD_IOMMU_EVENT_DESC(mem_dte_hit,             "csource=0x0a"),
-	AMD_IOMMU_EVENT_DESC(mem_dte_mis,             "csource=0x0b"),
-	AMD_IOMMU_EVENT_DESC(page_tbl_read_tot,       "csource=0x0c"),
-	AMD_IOMMU_EVENT_DESC(page_tbl_read_nst,       "csource=0x0d"),
-	AMD_IOMMU_EVENT_DESC(page_tbl_read_gst,       "csource=0x0e"),
-	AMD_IOMMU_EVENT_DESC(int_dte_hit,             "csource=0x0f"),
-	AMD_IOMMU_EVENT_DESC(int_dte_mis,             "csource=0x10"),
-	AMD_IOMMU_EVENT_DESC(cmd_processed,           "csource=0x11"),
-	AMD_IOMMU_EVENT_DESC(cmd_processed_inv,       "csource=0x12"),
-	AMD_IOMMU_EVENT_DESC(tlb_inv,                 "csource=0x13"),
-	{ /* end: all zeroes */ },
-};
-
-/*---------------------------------------------
- * sysfs cpumask attributes
- *---------------------------------------------*/
-static cpumask_t iommu_cpumask;
-
-static ssize_t _iommu_cpumask_show(struct device *dev,
-				   struct device_attribute *attr,
-				   char *buf)
-{
-	return cpumap_print_to_pagebuf(true, buf, &iommu_cpumask);
-}
-static DEVICE_ATTR(cpumask, S_IRUGO, _iommu_cpumask_show, NULL);
-
-static struct attribute *iommu_cpumask_attrs[] = {
-	&dev_attr_cpumask.attr,
-	NULL,
-};
-
-static struct attribute_group amd_iommu_cpumask_group = {
-	.attrs = iommu_cpumask_attrs,
-};
-
-/*---------------------------------------------*/
-
-static int get_next_avail_iommu_bnk_cntr(struct perf_amd_iommu *perf_iommu)
-{
-	unsigned long flags;
-	int shift, bank, cntr, retval;
-	int max_banks = perf_iommu->max_banks;
-	int max_cntrs = perf_iommu->max_counters;
-
-	raw_spin_lock_irqsave(&perf_iommu->lock, flags);
-
-	for (bank = 0, shift = 0; bank < max_banks; bank++) {
-		for (cntr = 0; cntr < max_cntrs; cntr++) {
-			shift = bank + (bank*3) + cntr;
-			if (perf_iommu->cntr_assign_mask & (1ULL<<shift)) {
-				continue;
-			} else {
-				perf_iommu->cntr_assign_mask |= (1ULL<<shift);
-				retval = ((u16)((u16)bank<<8) | (u8)(cntr));
-				goto out;
-			}
-		}
-	}
-	retval = -ENOSPC;
-out:
-	raw_spin_unlock_irqrestore(&perf_iommu->lock, flags);
-	return retval;
-}
-
-static int clear_avail_iommu_bnk_cntr(struct perf_amd_iommu *perf_iommu,
-					u8 bank, u8 cntr)
-{
-	unsigned long flags;
-	int max_banks, max_cntrs;
-	int shift = 0;
-
-	max_banks = perf_iommu->max_banks;
-	max_cntrs = perf_iommu->max_counters;
-
-	if ((bank > max_banks) || (cntr > max_cntrs))
-		return -EINVAL;
-
-	shift = bank + cntr + (bank*3);
-
-	raw_spin_lock_irqsave(&perf_iommu->lock, flags);
-	perf_iommu->cntr_assign_mask &= ~(1ULL<<shift);
-	raw_spin_unlock_irqrestore(&perf_iommu->lock, flags);
-
-	return 0;
-}
-
-static int perf_iommu_event_init(struct perf_event *event)
-{
-	struct hw_perf_event *hwc = &event->hw;
-	struct perf_amd_iommu *perf_iommu;
-	u64 config, config1;
-
-	/* test the event attr type check for PMU enumeration */
-	if (event->attr.type != event->pmu->type)
-		return -ENOENT;
-
-	/*
-	 * IOMMU counters are shared across all cores.
-	 * Therefore, it does not support per-process mode.
-	 * Also, it does not support event sampling mode.
-	 */
-	if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
-		return -EINVAL;
-
-	/* IOMMU counters do not have usr/os/guest/host bits */
-	if (event->attr.exclude_user || event->attr.exclude_kernel ||
-	    event->attr.exclude_host || event->attr.exclude_guest)
-		return -EINVAL;
-
-	if (event->cpu < 0)
-		return -EINVAL;
-
-	perf_iommu = &__perf_iommu;
-
-	if (event->pmu != &perf_iommu->pmu)
-		return -ENOENT;
-
-	if (perf_iommu) {
-		config = event->attr.config;
-		config1 = event->attr.config1;
-	} else {
-		return -EINVAL;
-	}
-
-	/* integrate with iommu base devid (0000), assume one iommu */
-	perf_iommu->max_banks =
-		amd_iommu_pc_get_max_banks(IOMMU_BASE_DEVID);
-	perf_iommu->max_counters =
-		amd_iommu_pc_get_max_counters(IOMMU_BASE_DEVID);
-	if ((perf_iommu->max_banks == 0) || (perf_iommu->max_counters == 0))
-		return -EINVAL;
-
-	/* update the hw_perf_event struct with the iommu config data */
-	hwc->config = config;
-	hwc->extra_reg.config = config1;
-
-	return 0;
-}
-
-static void perf_iommu_enable_event(struct perf_event *ev)
-{
-	u8 csource = _GET_CSOURCE(ev);
-	u16 devid = _GET_DEVID(ev);
-	u64 reg = 0ULL;
-
-	reg = csource;
-	amd_iommu_pc_get_set_reg_val(devid,
-			_GET_BANK(ev), _GET_CNTR(ev) ,
-			 IOMMU_PC_COUNTER_SRC_REG, &reg, true);
-
-	reg = 0ULL | devid | (_GET_DEVID_MASK(ev) << 32);
-	if (reg)
-		reg |= (1UL << 31);
-	amd_iommu_pc_get_set_reg_val(devid,
-			_GET_BANK(ev), _GET_CNTR(ev) ,
-			 IOMMU_PC_DEVID_MATCH_REG, &reg, true);
-
-	reg = 0ULL | _GET_PASID(ev) | (_GET_PASID_MASK(ev) << 32);
-	if (reg)
-		reg |= (1UL << 31);
-	amd_iommu_pc_get_set_reg_val(devid,
-			_GET_BANK(ev), _GET_CNTR(ev) ,
-			 IOMMU_PC_PASID_MATCH_REG, &reg, true);
-
-	reg = 0ULL | _GET_DOMID(ev) | (_GET_DOMID_MASK(ev) << 32);
-	if (reg)
-		reg |= (1UL << 31);
-	amd_iommu_pc_get_set_reg_val(devid,
-			_GET_BANK(ev), _GET_CNTR(ev) ,
-			 IOMMU_PC_DOMID_MATCH_REG, &reg, true);
-}
-
-static void perf_iommu_disable_event(struct perf_event *event)
-{
-	u64 reg = 0ULL;
-
-	amd_iommu_pc_get_set_reg_val(_GET_DEVID(event),
-			_GET_BANK(event), _GET_CNTR(event),
-			IOMMU_PC_COUNTER_SRC_REG, &reg, true);
-}
-
-static void perf_iommu_start(struct perf_event *event, int flags)
-{
-	struct hw_perf_event *hwc = &event->hw;
-
-	pr_debug("perf: amd_iommu:perf_iommu_start\n");
-	if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
-		return;
-
-	WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
-	hwc->state = 0;
-
-	if (flags & PERF_EF_RELOAD) {
-		u64 prev_raw_count =  local64_read(&hwc->prev_count);
-		amd_iommu_pc_get_set_reg_val(_GET_DEVID(event),
-				_GET_BANK(event), _GET_CNTR(event),
-				IOMMU_PC_COUNTER_REG, &prev_raw_count, true);
-	}
-
-	perf_iommu_enable_event(event);
-	perf_event_update_userpage(event);
-
-}
-
-static void perf_iommu_read(struct perf_event *event)
-{
-	u64 count = 0ULL;
-	u64 prev_raw_count = 0ULL;
-	u64 delta = 0ULL;
-	struct hw_perf_event *hwc = &event->hw;
-	pr_debug("perf: amd_iommu:perf_iommu_read\n");
-
-	amd_iommu_pc_get_set_reg_val(_GET_DEVID(event),
-				_GET_BANK(event), _GET_CNTR(event),
-				IOMMU_PC_COUNTER_REG, &count, false);
-
-	/* IOMMU pc counter register is only 48 bits */
-	count &= 0xFFFFFFFFFFFFULL;
-
-	prev_raw_count =  local64_read(&hwc->prev_count);
-	if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
-					count) != prev_raw_count)
-		return;
-
-	/* Handling 48-bit counter overflowing */
-	delta = (count << COUNTER_SHIFT) - (prev_raw_count << COUNTER_SHIFT);
-	delta >>= COUNTER_SHIFT;
-	local64_add(delta, &event->count);
-
-}
-
-static void perf_iommu_stop(struct perf_event *event, int flags)
-{
-	struct hw_perf_event *hwc = &event->hw;
-	u64 config;
-
-	pr_debug("perf: amd_iommu:perf_iommu_stop\n");
-
-	if (hwc->state & PERF_HES_UPTODATE)
-		return;
-
-	perf_iommu_disable_event(event);
-	WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
-	hwc->state |= PERF_HES_STOPPED;
-
-	if (hwc->state & PERF_HES_UPTODATE)
-		return;
-
-	config = hwc->config;
-	perf_iommu_read(event);
-	hwc->state |= PERF_HES_UPTODATE;
-}
-
-static int perf_iommu_add(struct perf_event *event, int flags)
-{
-	int retval;
-	struct perf_amd_iommu *perf_iommu =
-			container_of(event->pmu, struct perf_amd_iommu, pmu);
-
-	pr_debug("perf: amd_iommu:perf_iommu_add\n");
-	event->hw.state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
-
-	/* request an iommu bank/counter */
-	retval = get_next_avail_iommu_bnk_cntr(perf_iommu);
-	if (retval != -ENOSPC)
-		event->hw.extra_reg.reg = (u16)retval;
-	else
-		return retval;
-
-	if (flags & PERF_EF_START)
-		perf_iommu_start(event, PERF_EF_RELOAD);
-
-	return 0;
-}
-
-static void perf_iommu_del(struct perf_event *event, int flags)
-{
-	struct perf_amd_iommu *perf_iommu =
-			container_of(event->pmu, struct perf_amd_iommu, pmu);
-
-	pr_debug("perf: amd_iommu:perf_iommu_del\n");
-	perf_iommu_stop(event, PERF_EF_UPDATE);
-
-	/* clear the assigned iommu bank/counter */
-	clear_avail_iommu_bnk_cntr(perf_iommu,
-				     _GET_BANK(event),
-				     _GET_CNTR(event));
-
-	perf_event_update_userpage(event);
-}
-
-static __init int _init_events_attrs(struct perf_amd_iommu *perf_iommu)
-{
-	struct attribute **attrs;
-	struct attribute_group *attr_group;
-	int i = 0, j;
-
-	while (amd_iommu_v2_event_descs[i].attr.attr.name)
-		i++;
-
-	attr_group = kzalloc(sizeof(struct attribute *)
-		* (i + 1) + sizeof(*attr_group), GFP_KERNEL);
-	if (!attr_group)
-		return -ENOMEM;
-
-	attrs = (struct attribute **)(attr_group + 1);
-	for (j = 0; j < i; j++)
-		attrs[j] = &amd_iommu_v2_event_descs[j].attr.attr;
-
-	attr_group->name = "events";
-	attr_group->attrs = attrs;
-	perf_iommu->events_group = attr_group;
-
-	return 0;
-}
-
-static __init void amd_iommu_pc_exit(void)
-{
-	if (__perf_iommu.events_group != NULL) {
-		kfree(__perf_iommu.events_group);
-		__perf_iommu.events_group = NULL;
-	}
-}
-
-static __init int _init_perf_amd_iommu(
-	struct perf_amd_iommu *perf_iommu, char *name)
-{
-	int ret;
-
-	raw_spin_lock_init(&perf_iommu->lock);
-
-	/* Init format attributes */
-	perf_iommu->format_group = &amd_iommu_format_group;
-
-	/* Init cpumask attributes to only core 0 */
-	cpumask_set_cpu(0, &iommu_cpumask);
-	perf_iommu->cpumask_group = &amd_iommu_cpumask_group;
-
-	/* Init events attributes */
-	if (_init_events_attrs(perf_iommu) != 0)
-		pr_err("perf: amd_iommu: Only support raw events.\n");
-
-	/* Init null attributes */
-	perf_iommu->null_group = NULL;
-	perf_iommu->pmu.attr_groups = perf_iommu->attr_groups;
-
-	ret = perf_pmu_register(&perf_iommu->pmu, name, -1);
-	if (ret) {
-		pr_err("perf: amd_iommu: Failed to initialized.\n");
-		amd_iommu_pc_exit();
-	} else {
-		pr_info("perf: amd_iommu: Detected. (%d banks, %d counters/bank)\n",
-			amd_iommu_pc_get_max_banks(IOMMU_BASE_DEVID),
-			amd_iommu_pc_get_max_counters(IOMMU_BASE_DEVID));
-	}
-
-	return ret;
-}
-
-static struct perf_amd_iommu __perf_iommu = {
-	.pmu = {
-		.event_init	= perf_iommu_event_init,
-		.add		= perf_iommu_add,
-		.del		= perf_iommu_del,
-		.start		= perf_iommu_start,
-		.stop		= perf_iommu_stop,
-		.read		= perf_iommu_read,
-	},
-	.max_banks		= 0x00,
-	.max_counters		= 0x00,
-	.cntr_assign_mask	= 0ULL,
-	.format_group		= NULL,
-	.cpumask_group		= NULL,
-	.events_group		= NULL,
-	.null_group		= NULL,
-};
-
-static __init int amd_iommu_pc_init(void)
-{
-	/* Make sure the IOMMU PC resource is available */
-	if (!amd_iommu_pc_supported())
-		return -ENODEV;
-
-	_init_perf_amd_iommu(&__perf_iommu, "amd_iommu");
-
-	return 0;
-}
-
-device_initcall(amd_iommu_pc_init);
diff --git a/arch/x86/kernel/cpu/perf_event_amd_iommu.h b/arch/x86/kernel/cpu/perf_event_amd_iommu.h
deleted file mode 100644
index 845d173278e3..000000000000
--- a/arch/x86/kernel/cpu/perf_event_amd_iommu.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2013 Advanced Micro Devices, Inc.
- *
- * Author: Steven Kinney <Steven.Kinney@amd.com>
- * Author: Suravee Suthikulpanit <Suraveee.Suthikulpanit@amd.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef _PERF_EVENT_AMD_IOMMU_H_
-#define _PERF_EVENT_AMD_IOMMU_H_
-
-/* iommu pc mmio region register indexes */
-#define IOMMU_PC_COUNTER_REG			0x00
-#define IOMMU_PC_COUNTER_SRC_REG		0x08
-#define IOMMU_PC_PASID_MATCH_REG		0x10
-#define IOMMU_PC_DOMID_MATCH_REG		0x18
-#define IOMMU_PC_DEVID_MATCH_REG		0x20
-#define IOMMU_PC_COUNTER_REPORT_REG		0x28
-
-/* maximun specified bank/counters */
-#define PC_MAX_SPEC_BNKS			64
-#define PC_MAX_SPEC_CNTRS			16
-
-/* iommu pc reg masks*/
-#define IOMMU_BASE_DEVID			0x0000
-
-/* amd_iommu_init.c external support functions */
-extern bool amd_iommu_pc_supported(void);
-
-extern u8 amd_iommu_pc_get_max_banks(u16 devid);
-
-extern u8 amd_iommu_pc_get_max_counters(u16 devid);
-
-extern int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr,
-			u8 fxn, u64 *value, bool is_write);
-
-#endif /*_PERF_EVENT_AMD_IOMMU_H_*/