[Arm-dev] [PATCH v2 05/11] Add X-Gene SoC PMU support

Fri Nov 11 19:02:34 UTC 2016
Duc Dang <dhdang at apm.com>

Integrate upstream support for APM X-Gene SoC PMU
and bug fixes.

Signed-off-by: Duc Dang <dhdang at apm.com>
---
 ...Add-APM-X-Gene-SoC-Performance-Monitoring.patch | 1508 ++++++++++++++++++++
 ...1008-perf-xgene-Remove-bogus-IS_ERR-check.patch |   39 +
 ...S-Add-entry-for-APM-X-Gene-SoC-PMU-driver.patch |   34 +
 SOURCES/config-centos-sig                          |    1 +
 SPECS/kernel-aarch64.spec                          |    7 +
 5 files changed, 1589 insertions(+)
 create mode 100644 SOURCES/1007-perf-xgene-Add-APM-X-Gene-SoC-Performance-Monitoring.patch
 create mode 100644 SOURCES/1008-perf-xgene-Remove-bogus-IS_ERR-check.patch
 create mode 100644 SOURCES/1009-MAINTAINERS-Add-entry-for-APM-X-Gene-SoC-PMU-driver.patch

diff --git a/SOURCES/1007-perf-xgene-Add-APM-X-Gene-SoC-Performance-Monitoring.patch b/SOURCES/1007-perf-xgene-Add-APM-X-Gene-SoC-Performance-Monitoring.patch
new file mode 100644
index 0000000..3e35a53
--- /dev/null
+++ b/SOURCES/1007-perf-xgene-Add-APM-X-Gene-SoC-Performance-Monitoring.patch
@@ -0,0 +1,1508 @@
+From c807faa271d0983fa8f8e0dc327b111f01ffa012 Mon Sep 17 00:00:00 2001
+From: Tai Nguyen <ttnguyen at apm.com>
+Date: Wed, 9 Nov 2016 17:31:06 -0600
+Subject: [PATCH 1007/1018] perf: xgene: Add APM X-Gene SoC Performance
+ Monitoring Unit driver
+
+This patch adds a driver for the SoC-wide (AKA uncore) PMU hardware
+found in APM X-Gene SoCs.
+
+Signed-off-by: Tai Nguyen <ttnguyen at apm.com>
+Reviewed-by: Mark Rutland <mark.rutland at arm.com>
+
+[Apply from upstream commit 4.8 to CentOS 7.3 AltArch]
+Signed-off-by: Duc Dang <dhdang at apm.com>
+---
+ Documentation/perf/xgene-pmu.txt |   48 ++
+ drivers/perf/Kconfig             |    7 +
+ drivers/perf/Makefile            |    1 +
+ drivers/perf/xgene_pmu.c         | 1398 ++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 1454 insertions(+)
+ create mode 100644 Documentation/perf/xgene-pmu.txt
+ create mode 100644 drivers/perf/xgene_pmu.c
+
+diff --git a/Documentation/perf/xgene-pmu.txt b/Documentation/perf/xgene-pmu.txt
+new file mode 100644
+index 0000000..d7cff44
+--- /dev/null
++++ b/Documentation/perf/xgene-pmu.txt
+@@ -0,0 +1,48 @@
++APM X-Gene SoC Performance Monitoring Unit (PMU)
++================================================
++
++X-Gene SoC PMU consists of various independent system device PMUs such as
++L3 cache(s), I/O bridge(s), memory controller bridge(s) and memory
++controller(s). These PMU devices are loosely architected to follow the
++same model as the PMU for ARM cores. The PMUs share the same top level
++interrupt and status CSR region.
++
++PMU (perf) driver
++-----------------
++
++The xgene-pmu driver registers several perf PMU drivers. Each of the perf
++driver provides description of its available events and configuration options
++in sysfs, see /sys/devices/<l3cX/iobX/mcbX/mcX>/.
++
++The "format" directory describes format of the config (event ID),
++config1 (agent ID) fields of the perf_event_attr structure. The "events"
++directory provides configuration templates for all supported event types that
++can be used with perf tool. For example, "l3c0/bank-fifo-full/" is an
++equivalent of "l3c0/config=0x0b/".
++
++Most of the SoC PMU has a specific list of agent ID used for monitoring
++performance of a specific datapath. For example, agents of a L3 cache can be
++a specific CPU or an I/O bridge. Each PMU has a set of 2 registers capable of
++masking the agents from which the request come from. If the bit with
++the bit number corresponding to the agent is set, the event is counted only if
++it is caused by a request from that agent. Each agent ID bit is inversely mapped
++to a corresponding bit in "config1" field. By default, the event will be
++counted for all agent requests (config1 = 0x0). For all the supported agents of
++each PMU, please refer to APM X-Gene User Manual.
++
++Each perf driver also provides a "cpumask" sysfs attribute, which contains a
++single CPU ID of the processor which will be used to handle all the PMU events.
++
++Example for perf tool use:
++
++ / # perf list | grep -e l3c -e iob -e mcb -e mc
++   l3c0/ackq-full/                                    [Kernel PMU event]
++ <...>
++   mcb1/mcb-csw-stall/                                [Kernel PMU event]
++
++ / # perf stat -a -e l3c0/read-miss/,mcb1/csw-write-request/ sleep 1
++
++ / # perf stat -a -e l3c0/read-miss,config1=0xfffffffffffffffe/ sleep 1
++
++The driver does not support sampling, therefore "perf record" will
++not work. Per-task (without "-a") perf sessions are not supported.
+diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
+index 818fa3b..a2f63f7 100644
+--- a/drivers/perf/Kconfig
++++ b/drivers/perf/Kconfig
+@@ -16,4 +16,11 @@ config ARM_PMU_ACPI
+ 	def_bool y
+ 	depends on ARM_PMU && ACPI
+ 
++config XGENE_PMU
++        depends on PERF_EVENTS && ARCH_XGENE
++        bool "APM X-Gene SoC PMU"
++        default n
++        help
++          Say y if you want to use APM X-Gene SoC performance monitors.
++
+ endmenu
+diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile
+index fd8090d..d1d7762 100644
+--- a/drivers/perf/Makefile
++++ b/drivers/perf/Makefile
+@@ -1,2 +1,3 @@
+ obj-$(CONFIG_ARM_PMU) += arm_pmu.o
++obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o
+ obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o
+diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c
+new file mode 100644
+index 0000000..c2ac764
+--- /dev/null
++++ b/drivers/perf/xgene_pmu.c
+@@ -0,0 +1,1398 @@
++/*
++ * APM X-Gene SoC PMU (Performance Monitor Unit)
++ *
++ * Copyright (c) 2016, Applied Micro Circuits Corporation
++ * Author: Hoan Tran <hotran at apm.com>
++ *         Tai Nguyen <ttnguyen at apm.com>
++ *
++ * This program is free software; you can redistribute  it and/or modify it
++ * under  the terms of  the GNU General  Public License as published by the
++ * Free Software Foundation;  either version 2 of the  License, or (at your
++ * option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
++ */
++
++#include <linux/acpi.h>
++#include <linux/clk.h>
++#include <linux/cpumask.h>
++#include <linux/interrupt.h>
++#include <linux/io.h>
++#include <linux/mfd/syscon.h>
++#include <linux/of_address.h>
++#include <linux/of_fdt.h>
++#include <linux/of_irq.h>
++#include <linux/of_platform.h>
++#include <linux/perf_event.h>
++#include <linux/platform_device.h>
++#include <linux/regmap.h>
++#include <linux/slab.h>
++
++#define CSW_CSWCR                       0x0000
++#define  CSW_CSWCR_DUALMCB_MASK         BIT(0)
++#define MCBADDRMR                       0x0000
++#define  MCBADDRMR_DUALMCU_MODE_MASK    BIT(2)
++
++#define PCPPMU_INTSTATUS_REG	0x000
++#define PCPPMU_INTMASK_REG	0x004
++#define  PCPPMU_INTMASK		0x0000000F
++#define  PCPPMU_INTENMASK	0xFFFFFFFF
++#define  PCPPMU_INTCLRMASK	0xFFFFFFF0
++#define  PCPPMU_INT_MCU		BIT(0)
++#define  PCPPMU_INT_MCB		BIT(1)
++#define  PCPPMU_INT_L3C		BIT(2)
++#define  PCPPMU_INT_IOB		BIT(3)
++
++#define PMU_MAX_COUNTERS	4
++#define PMU_CNT_MAX_PERIOD	0x100000000ULL
++#define PMU_OVERFLOW_MASK	0xF
++#define PMU_PMCR_E		BIT(0)
++#define PMU_PMCR_P		BIT(1)
++
++#define PMU_PMEVCNTR0		0x000
++#define PMU_PMEVCNTR1		0x004
++#define PMU_PMEVCNTR2		0x008
++#define PMU_PMEVCNTR3		0x00C
++#define PMU_PMEVTYPER0		0x400
++#define PMU_PMEVTYPER1		0x404
++#define PMU_PMEVTYPER2		0x408
++#define PMU_PMEVTYPER3		0x40C
++#define PMU_PMAMR0		0xA00
++#define PMU_PMAMR1		0xA04
++#define PMU_PMCNTENSET		0xC00
++#define PMU_PMCNTENCLR		0xC20
++#define PMU_PMINTENSET		0xC40
++#define PMU_PMINTENCLR		0xC60
++#define PMU_PMOVSR		0xC80
++#define PMU_PMCR		0xE04
++
++#define to_pmu_dev(p)     container_of(p, struct xgene_pmu_dev, pmu)
++#define GET_CNTR(ev)      (ev->hw.idx)
++#define GET_EVENTID(ev)   (ev->hw.config & 0xFFULL)
++#define GET_AGENTID(ev)   (ev->hw.config_base & 0xFFFFFFFFUL)
++#define GET_AGENT1ID(ev)  ((ev->hw.config_base >> 32) & 0xFFFFFFFFUL)
++
++struct hw_pmu_info {
++	u32 type;
++	u32 enable_mask;
++	void __iomem *csr;
++};
++
++struct xgene_pmu_dev {
++	struct hw_pmu_info *inf;
++	struct xgene_pmu *parent;
++	struct pmu pmu;
++	u8 max_counters;
++	DECLARE_BITMAP(cntr_assign_mask, PMU_MAX_COUNTERS);
++	u64 max_period;
++	const struct attribute_group **attr_groups;
++	struct perf_event *pmu_counter_event[PMU_MAX_COUNTERS];
++};
++
++struct xgene_pmu {
++	struct device *dev;
++	int version;
++	void __iomem *pcppmu_csr;
++	u32 mcb_active_mask;
++	u32 mc_active_mask;
++	cpumask_t cpu;
++	raw_spinlock_t lock;
++	struct list_head l3cpmus;
++	struct list_head iobpmus;
++	struct list_head mcbpmus;
++	struct list_head mcpmus;
++};
++
++struct xgene_pmu_dev_ctx {
++	char *name;
++	struct list_head next;
++	struct xgene_pmu_dev *pmu_dev;
++	struct hw_pmu_info inf;
++};
++
++struct xgene_pmu_data {
++	int id;
++	u32 data;
++};
++
++enum xgene_pmu_version {
++	PCP_PMU_V1 = 1,
++	PCP_PMU_V2,
++};
++
++enum xgene_pmu_dev_type {
++	PMU_TYPE_L3C = 0,
++	PMU_TYPE_IOB,
++	PMU_TYPE_MCB,
++	PMU_TYPE_MC,
++};
++
++/*
++ * sysfs format attributes
++ */
++static ssize_t xgene_pmu_format_show(struct device *dev,
++				     struct device_attribute *attr, char *buf)
++{
++	struct dev_ext_attribute *eattr;
++
++	eattr = container_of(attr, struct dev_ext_attribute, attr);
++	return sprintf(buf, "%s\n", (char *) eattr->var);
++}
++
++#define XGENE_PMU_FORMAT_ATTR(_name, _config)		\
++	(&((struct dev_ext_attribute[]) {		\
++		{ .attr = __ATTR(_name, S_IRUGO, xgene_pmu_format_show, NULL), \
++		  .var = (void *) _config, }		\
++	})[0].attr.attr)
++
++static struct attribute *l3c_pmu_format_attrs[] = {
++	XGENE_PMU_FORMAT_ATTR(l3c_eventid, "config:0-7"),
++	XGENE_PMU_FORMAT_ATTR(l3c_agentid, "config1:0-9"),
++	NULL,
++};
++
++static struct attribute *iob_pmu_format_attrs[] = {
++	XGENE_PMU_FORMAT_ATTR(iob_eventid, "config:0-7"),
++	XGENE_PMU_FORMAT_ATTR(iob_agentid, "config1:0-63"),
++	NULL,
++};
++
++static struct attribute *mcb_pmu_format_attrs[] = {
++	XGENE_PMU_FORMAT_ATTR(mcb_eventid, "config:0-5"),
++	XGENE_PMU_FORMAT_ATTR(mcb_agentid, "config1:0-9"),
++	NULL,
++};
++
++static struct attribute *mc_pmu_format_attrs[] = {
++	XGENE_PMU_FORMAT_ATTR(mc_eventid, "config:0-28"),
++	NULL,
++};
++
++static const struct attribute_group l3c_pmu_format_attr_group = {
++	.name = "format",
++	.attrs = l3c_pmu_format_attrs,
++};
++
++static const struct attribute_group iob_pmu_format_attr_group = {
++	.name = "format",
++	.attrs = iob_pmu_format_attrs,
++};
++
++static const struct attribute_group mcb_pmu_format_attr_group = {
++	.name = "format",
++	.attrs = mcb_pmu_format_attrs,
++};
++
++static const struct attribute_group mc_pmu_format_attr_group = {
++	.name = "format",
++	.attrs = mc_pmu_format_attrs,
++};
++
++/*
++ * sysfs event attributes
++ */
++static ssize_t xgene_pmu_event_show(struct device *dev,
++				    struct device_attribute *attr, char *buf)
++{
++	struct dev_ext_attribute *eattr;
++
++	eattr = container_of(attr, struct dev_ext_attribute, attr);
++	return sprintf(buf, "config=0x%lx\n", (unsigned long) eattr->var);
++}
++
++#define XGENE_PMU_EVENT_ATTR(_name, _config)		\
++	(&((struct dev_ext_attribute[]) {		\
++		{ .attr = __ATTR(_name, S_IRUGO, xgene_pmu_event_show, NULL), \
++		  .var = (void *) _config, }		\
++	 })[0].attr.attr)
++
++static struct attribute *l3c_pmu_events_attrs[] = {
++	XGENE_PMU_EVENT_ATTR(cycle-count,			0x00),
++	XGENE_PMU_EVENT_ATTR(cycle-count-div-64,		0x01),
++	XGENE_PMU_EVENT_ATTR(read-hit,				0x02),
++	XGENE_PMU_EVENT_ATTR(read-miss,				0x03),
++	XGENE_PMU_EVENT_ATTR(write-need-replacement,		0x06),
++	XGENE_PMU_EVENT_ATTR(write-not-need-replacement,	0x07),
++	XGENE_PMU_EVENT_ATTR(tq-full,				0x08),
++	XGENE_PMU_EVENT_ATTR(ackq-full,				0x09),
++	XGENE_PMU_EVENT_ATTR(wdb-full,				0x0a),
++	XGENE_PMU_EVENT_ATTR(bank-fifo-full,			0x0b),
++	XGENE_PMU_EVENT_ATTR(odb-full,				0x0c),
++	XGENE_PMU_EVENT_ATTR(wbq-full,				0x0d),
++	XGENE_PMU_EVENT_ATTR(bank-conflict-fifo-issue,		0x0e),
++	XGENE_PMU_EVENT_ATTR(bank-fifo-issue,			0x0f),
++	NULL,
++};
++
++static struct attribute *iob_pmu_events_attrs[] = {
++	XGENE_PMU_EVENT_ATTR(cycle-count,			0x00),
++	XGENE_PMU_EVENT_ATTR(cycle-count-div-64,		0x01),
++	XGENE_PMU_EVENT_ATTR(axi0-read,				0x02),
++	XGENE_PMU_EVENT_ATTR(axi0-read-partial,			0x03),
++	XGENE_PMU_EVENT_ATTR(axi1-read,				0x04),
++	XGENE_PMU_EVENT_ATTR(axi1-read-partial,			0x05),
++	XGENE_PMU_EVENT_ATTR(csw-read-block,			0x06),
++	XGENE_PMU_EVENT_ATTR(csw-read-partial,			0x07),
++	XGENE_PMU_EVENT_ATTR(axi0-write,			0x10),
++	XGENE_PMU_EVENT_ATTR(axi0-write-partial,		0x11),
++	XGENE_PMU_EVENT_ATTR(axi1-write,			0x13),
++	XGENE_PMU_EVENT_ATTR(axi1-write-partial,		0x14),
++	XGENE_PMU_EVENT_ATTR(csw-inbound-dirty,			0x16),
++	NULL,
++};
++
++static struct attribute *mcb_pmu_events_attrs[] = {
++	XGENE_PMU_EVENT_ATTR(cycle-count,			0x00),
++	XGENE_PMU_EVENT_ATTR(cycle-count-div-64,		0x01),
++	XGENE_PMU_EVENT_ATTR(csw-read,				0x02),
++	XGENE_PMU_EVENT_ATTR(csw-write-request,			0x03),
++	XGENE_PMU_EVENT_ATTR(mcb-csw-stall,			0x04),
++	XGENE_PMU_EVENT_ATTR(cancel-read-gack,			0x05),
++	NULL,
++};
++
++static struct attribute *mc_pmu_events_attrs[] = {
++	XGENE_PMU_EVENT_ATTR(cycle-count,			0x00),
++	XGENE_PMU_EVENT_ATTR(cycle-count-div-64,		0x01),
++	XGENE_PMU_EVENT_ATTR(act-cmd-sent,			0x02),
++	XGENE_PMU_EVENT_ATTR(pre-cmd-sent,			0x03),
++	XGENE_PMU_EVENT_ATTR(rd-cmd-sent,			0x04),
++	XGENE_PMU_EVENT_ATTR(rda-cmd-sent,			0x05),
++	XGENE_PMU_EVENT_ATTR(wr-cmd-sent,			0x06),
++	XGENE_PMU_EVENT_ATTR(wra-cmd-sent,			0x07),
++	XGENE_PMU_EVENT_ATTR(pde-cmd-sent,			0x08),
++	XGENE_PMU_EVENT_ATTR(sre-cmd-sent,			0x09),
++	XGENE_PMU_EVENT_ATTR(prea-cmd-sent,			0x0a),
++	XGENE_PMU_EVENT_ATTR(ref-cmd-sent,			0x0b),
++	XGENE_PMU_EVENT_ATTR(rd-rda-cmd-sent,			0x0c),
++	XGENE_PMU_EVENT_ATTR(wr-wra-cmd-sent,			0x0d),
++	XGENE_PMU_EVENT_ATTR(in-rd-collision,			0x0e),
++	XGENE_PMU_EVENT_ATTR(in-wr-collision,			0x0f),
++	XGENE_PMU_EVENT_ATTR(collision-queue-not-empty,		0x10),
++	XGENE_PMU_EVENT_ATTR(collision-queue-full,		0x11),
++	XGENE_PMU_EVENT_ATTR(mcu-request,			0x12),
++	XGENE_PMU_EVENT_ATTR(mcu-rd-request,			0x13),
++	XGENE_PMU_EVENT_ATTR(mcu-hp-rd-request,			0x14),
++	XGENE_PMU_EVENT_ATTR(mcu-wr-request,			0x15),
++	XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-all,		0x16),
++	XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-cancel,		0x17),
++	XGENE_PMU_EVENT_ATTR(mcu-rd-response,			0x18),
++	XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-all,	0x19),
++	XGENE_PMU_EVENT_ATTR(mcu-rd-proceed-speculative-cancel,	0x1a),
++	XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-all,		0x1b),
++	XGENE_PMU_EVENT_ATTR(mcu-wr-proceed-cancel,		0x1c),
++	NULL,
++};
++
++static const struct attribute_group l3c_pmu_events_attr_group = {
++	.name = "events",
++	.attrs = l3c_pmu_events_attrs,
++};
++
++static const struct attribute_group iob_pmu_events_attr_group = {
++	.name = "events",
++	.attrs = iob_pmu_events_attrs,
++};
++
++static const struct attribute_group mcb_pmu_events_attr_group = {
++	.name = "events",
++	.attrs = mcb_pmu_events_attrs,
++};
++
++static const struct attribute_group mc_pmu_events_attr_group = {
++	.name = "events",
++	.attrs = mc_pmu_events_attrs,
++};
++
++/*
++ * sysfs cpumask attributes
++ */
++static ssize_t xgene_pmu_cpumask_show(struct device *dev,
++				      struct device_attribute *attr, char *buf)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(dev_get_drvdata(dev));
++
++	return cpumap_print_to_pagebuf(true, buf, &pmu_dev->parent->cpu);
++}
++
++static DEVICE_ATTR(cpumask, S_IRUGO, xgene_pmu_cpumask_show, NULL);
++
++static struct attribute *xgene_pmu_cpumask_attrs[] = {
++	&dev_attr_cpumask.attr,
++	NULL,
++};
++
++static const struct attribute_group pmu_cpumask_attr_group = {
++	.attrs = xgene_pmu_cpumask_attrs,
++};
++
++/*
++ * Per PMU device attribute groups
++ */
++static const struct attribute_group *l3c_pmu_attr_groups[] = {
++	&l3c_pmu_format_attr_group,
++	&pmu_cpumask_attr_group,
++	&l3c_pmu_events_attr_group,
++	NULL
++};
++
++static const struct attribute_group *iob_pmu_attr_groups[] = {
++	&iob_pmu_format_attr_group,
++	&pmu_cpumask_attr_group,
++	&iob_pmu_events_attr_group,
++	NULL
++};
++
++static const struct attribute_group *mcb_pmu_attr_groups[] = {
++	&mcb_pmu_format_attr_group,
++	&pmu_cpumask_attr_group,
++	&mcb_pmu_events_attr_group,
++	NULL
++};
++
++static const struct attribute_group *mc_pmu_attr_groups[] = {
++	&mc_pmu_format_attr_group,
++	&pmu_cpumask_attr_group,
++	&mc_pmu_events_attr_group,
++	NULL
++};
++
++static int get_next_avail_cntr(struct xgene_pmu_dev *pmu_dev)
++{
++	int cntr;
++
++	cntr = find_first_zero_bit(pmu_dev->cntr_assign_mask,
++				pmu_dev->max_counters);
++	if (cntr == pmu_dev->max_counters)
++		return -ENOSPC;
++	set_bit(cntr, pmu_dev->cntr_assign_mask);
++
++	return cntr;
++}
++
++static void clear_avail_cntr(struct xgene_pmu_dev *pmu_dev, int cntr)
++{
++	clear_bit(cntr, pmu_dev->cntr_assign_mask);
++}
++
++static inline void xgene_pmu_mask_int(struct xgene_pmu *xgene_pmu)
++{
++	writel(PCPPMU_INTENMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
++}
++
++static inline void xgene_pmu_unmask_int(struct xgene_pmu *xgene_pmu)
++{
++	writel(PCPPMU_INTCLRMASK, xgene_pmu->pcppmu_csr + PCPPMU_INTMASK_REG);
++}
++
++static inline u32 xgene_pmu_read_counter(struct xgene_pmu_dev *pmu_dev, int idx)
++{
++	return readl(pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
++}
++
++static inline void
++xgene_pmu_write_counter(struct xgene_pmu_dev *pmu_dev, int idx, u32 val)
++{
++	writel(val, pmu_dev->inf->csr + PMU_PMEVCNTR0 + (4 * idx));
++}
++
++static inline void
++xgene_pmu_write_evttype(struct xgene_pmu_dev *pmu_dev, int idx, u32 val)
++{
++	writel(val, pmu_dev->inf->csr + PMU_PMEVTYPER0 + (4 * idx));
++}
++
++static inline void
++xgene_pmu_write_agentmsk(struct xgene_pmu_dev *pmu_dev, u32 val)
++{
++	writel(val, pmu_dev->inf->csr + PMU_PMAMR0);
++}
++
++static inline void
++xgene_pmu_write_agent1msk(struct xgene_pmu_dev *pmu_dev, u32 val)
++{
++	writel(val, pmu_dev->inf->csr + PMU_PMAMR1);
++}
++
++static inline void
++xgene_pmu_enable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
++{
++	u32 val;
++
++	val = readl(pmu_dev->inf->csr + PMU_PMCNTENSET);
++	val |= 1 << idx;
++	writel(val, pmu_dev->inf->csr + PMU_PMCNTENSET);
++}
++
++static inline void
++xgene_pmu_disable_counter(struct xgene_pmu_dev *pmu_dev, int idx)
++{
++	u32 val;
++
++	val = readl(pmu_dev->inf->csr + PMU_PMCNTENCLR);
++	val |= 1 << idx;
++	writel(val, pmu_dev->inf->csr + PMU_PMCNTENCLR);
++}
++
++static inline void
++xgene_pmu_enable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
++{
++	u32 val;
++
++	val = readl(pmu_dev->inf->csr + PMU_PMINTENSET);
++	val |= 1 << idx;
++	writel(val, pmu_dev->inf->csr + PMU_PMINTENSET);
++}
++
++static inline void
++xgene_pmu_disable_counter_int(struct xgene_pmu_dev *pmu_dev, int idx)
++{
++	u32 val;
++
++	val = readl(pmu_dev->inf->csr + PMU_PMINTENCLR);
++	val |= 1 << idx;
++	writel(val, pmu_dev->inf->csr + PMU_PMINTENCLR);
++}
++
++static inline void xgene_pmu_reset_counters(struct xgene_pmu_dev *pmu_dev)
++{
++	u32 val;
++
++	val = readl(pmu_dev->inf->csr + PMU_PMCR);
++	val |= PMU_PMCR_P;
++	writel(val, pmu_dev->inf->csr + PMU_PMCR);
++}
++
++static inline void xgene_pmu_start_counters(struct xgene_pmu_dev *pmu_dev)
++{
++	u32 val;
++
++	val = readl(pmu_dev->inf->csr + PMU_PMCR);
++	val |= PMU_PMCR_E;
++	writel(val, pmu_dev->inf->csr + PMU_PMCR);
++}
++
++static inline void xgene_pmu_stop_counters(struct xgene_pmu_dev *pmu_dev)
++{
++	u32 val;
++
++	val = readl(pmu_dev->inf->csr + PMU_PMCR);
++	val &= ~PMU_PMCR_E;
++	writel(val, pmu_dev->inf->csr + PMU_PMCR);
++}
++
++static void xgene_perf_pmu_enable(struct pmu *pmu)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
++	int enabled = bitmap_weight(pmu_dev->cntr_assign_mask,
++			pmu_dev->max_counters);
++
++	if (!enabled)
++		return;
++
++	xgene_pmu_start_counters(pmu_dev);
++}
++
++static void xgene_perf_pmu_disable(struct pmu *pmu)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(pmu);
++
++	xgene_pmu_stop_counters(pmu_dev);
++}
++
++static int xgene_perf_event_init(struct perf_event *event)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
++	struct hw_perf_event *hw = &event->hw;
++	struct perf_event *sibling;
++
++	/* Test the event attr type check for PMU enumeration */
++	if (event->attr.type != event->pmu->type)
++		return -ENOENT;
++
++	/*
++	 * SOC PMU 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;
++
++	/* SOC 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;
++	/*
++	 * Many perf core operations (eg. events rotation) operate on a
++	 * single CPU context. This is obvious for CPU PMUs, where one
++	 * expects the same sets of events being observed on all CPUs,
++	 * but can lead to issues for off-core PMUs, where each
++	 * event could be theoretically assigned to a different CPU. To
++	 * mitigate this, we enforce CPU assignment to one, selected
++	 * processor (the one described in the "cpumask" attribute).
++	 */
++	event->cpu = cpumask_first(&pmu_dev->parent->cpu);
++
++	hw->config = event->attr.config;
++	/*
++	 * Each bit of the config1 field represents an agent from which the
++	 * request of the event come. The event is counted only if it's caused
++	 * by a request of an agent has the bit cleared.
++	 * By default, the event is counted for all agents.
++	 */
++	hw->config_base = event->attr.config1;
++
++	/*
++	 * We must NOT create groups containing mixed PMUs, although software
++	 * events are acceptable
++	 */
++	if (event->group_leader->pmu != event->pmu &&
++			!is_software_event(event->group_leader))
++		return -EINVAL;
++
++	list_for_each_entry(sibling, &event->group_leader->sibling_list,
++			group_entry)
++		if (sibling->pmu != event->pmu &&
++				!is_software_event(sibling))
++			return -EINVAL;
++
++	return 0;
++}
++
++static void xgene_perf_enable_event(struct perf_event *event)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
++
++	xgene_pmu_write_evttype(pmu_dev, GET_CNTR(event), GET_EVENTID(event));
++	xgene_pmu_write_agentmsk(pmu_dev, ~((u32)GET_AGENTID(event)));
++	if (pmu_dev->inf->type == PMU_TYPE_IOB)
++		xgene_pmu_write_agent1msk(pmu_dev, ~((u32)GET_AGENT1ID(event)));
++
++	xgene_pmu_enable_counter(pmu_dev, GET_CNTR(event));
++	xgene_pmu_enable_counter_int(pmu_dev, GET_CNTR(event));
++}
++
++static void xgene_perf_disable_event(struct perf_event *event)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
++
++	xgene_pmu_disable_counter(pmu_dev, GET_CNTR(event));
++	xgene_pmu_disable_counter_int(pmu_dev, GET_CNTR(event));
++}
++
++static void xgene_perf_event_set_period(struct perf_event *event)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
++	struct hw_perf_event *hw = &event->hw;
++	/*
++	 * The X-Gene PMU counters have a period of 2^32. To account for the
++	 * possiblity of extreme interrupt latency we program for a period of
++	 * half that. Hopefully we can handle the interrupt before another 2^31
++	 * events occur and the counter overtakes its previous value.
++	 */
++	u64 val = 1ULL << 31;
++
++	local64_set(&hw->prev_count, val);
++	xgene_pmu_write_counter(pmu_dev, hw->idx, (u32) val);
++}
++
++static void xgene_perf_event_update(struct perf_event *event)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
++	struct hw_perf_event *hw = &event->hw;
++	u64 delta, prev_raw_count, new_raw_count;
++
++again:
++	prev_raw_count = local64_read(&hw->prev_count);
++	new_raw_count = xgene_pmu_read_counter(pmu_dev, GET_CNTR(event));
++
++	if (local64_cmpxchg(&hw->prev_count, prev_raw_count,
++			    new_raw_count) != prev_raw_count)
++		goto again;
++
++	delta = (new_raw_count - prev_raw_count) & pmu_dev->max_period;
++
++	local64_add(delta, &event->count);
++}
++
++static void xgene_perf_read(struct perf_event *event)
++{
++	xgene_perf_event_update(event);
++}
++
++static void xgene_perf_start(struct perf_event *event, int flags)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
++	struct hw_perf_event *hw = &event->hw;
++
++	if (WARN_ON_ONCE(!(hw->state & PERF_HES_STOPPED)))
++		return;
++
++	WARN_ON_ONCE(!(hw->state & PERF_HES_UPTODATE));
++	hw->state = 0;
++
++	xgene_perf_event_set_period(event);
++
++	if (flags & PERF_EF_RELOAD) {
++		u64 prev_raw_count =  local64_read(&hw->prev_count);
++
++		xgene_pmu_write_counter(pmu_dev, GET_CNTR(event),
++					(u32) prev_raw_count);
++	}
++
++	xgene_perf_enable_event(event);
++	perf_event_update_userpage(event);
++}
++
++static void xgene_perf_stop(struct perf_event *event, int flags)
++{
++	struct hw_perf_event *hw = &event->hw;
++	u64 config;
++
++	if (hw->state & PERF_HES_UPTODATE)
++		return;
++
++	xgene_perf_disable_event(event);
++	WARN_ON_ONCE(hw->state & PERF_HES_STOPPED);
++	hw->state |= PERF_HES_STOPPED;
++
++	if (hw->state & PERF_HES_UPTODATE)
++		return;
++
++	config = hw->config;
++	xgene_perf_read(event);
++	hw->state |= PERF_HES_UPTODATE;
++}
++
++static int xgene_perf_add(struct perf_event *event, int flags)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
++	struct hw_perf_event *hw = &event->hw;
++
++	hw->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
++
++	/* Allocate an event counter */
++	hw->idx = get_next_avail_cntr(pmu_dev);
++	if (hw->idx < 0)
++		return -EAGAIN;
++
++	/* Update counter event pointer for Interrupt handler */
++	pmu_dev->pmu_counter_event[hw->idx] = event;
++
++	if (flags & PERF_EF_START)
++		xgene_perf_start(event, PERF_EF_RELOAD);
++
++	return 0;
++}
++
++static void xgene_perf_del(struct perf_event *event, int flags)
++{
++	struct xgene_pmu_dev *pmu_dev = to_pmu_dev(event->pmu);
++	struct hw_perf_event *hw = &event->hw;
++
++	xgene_perf_stop(event, PERF_EF_UPDATE);
++
++	/* clear the assigned counter */
++	clear_avail_cntr(pmu_dev, GET_CNTR(event));
++
++	perf_event_update_userpage(event);
++	pmu_dev->pmu_counter_event[hw->idx] = NULL;
++}
++
++static int xgene_init_perf(struct xgene_pmu_dev *pmu_dev, char *name)
++{
++	struct xgene_pmu *xgene_pmu;
++
++	pmu_dev->max_period = PMU_CNT_MAX_PERIOD - 1;
++	/* First version PMU supports only single event counter */
++	xgene_pmu = pmu_dev->parent;
++	if (xgene_pmu->version == PCP_PMU_V1)
++		pmu_dev->max_counters = 1;
++	else
++		pmu_dev->max_counters = PMU_MAX_COUNTERS;
++
++	/* Perf driver registration */
++	pmu_dev->pmu = (struct pmu) {
++		.attr_groups	= pmu_dev->attr_groups,
++		.task_ctx_nr	= perf_invalid_context,
++		.pmu_enable	= xgene_perf_pmu_enable,
++		.pmu_disable	= xgene_perf_pmu_disable,
++		.event_init	= xgene_perf_event_init,
++		.add		= xgene_perf_add,
++		.del		= xgene_perf_del,
++		.start		= xgene_perf_start,
++		.stop		= xgene_perf_stop,
++		.read		= xgene_perf_read,
++	};
++
++	/* Hardware counter init */
++	xgene_pmu_stop_counters(pmu_dev);
++	xgene_pmu_reset_counters(pmu_dev);
++
++	return perf_pmu_register(&pmu_dev->pmu, name, -1);
++}
++
++static int
++xgene_pmu_dev_add(struct xgene_pmu *xgene_pmu, struct xgene_pmu_dev_ctx *ctx)
++{
++	struct device *dev = xgene_pmu->dev;
++	struct xgene_pmu_dev *pmu;
++	int rc;
++
++	pmu = devm_kzalloc(dev, sizeof(*pmu), GFP_KERNEL);
++	if (!pmu)
++		return -ENOMEM;
++	pmu->parent = xgene_pmu;
++	pmu->inf = &ctx->inf;
++	ctx->pmu_dev = pmu;
++
++	switch (pmu->inf->type) {
++	case PMU_TYPE_L3C:
++		pmu->attr_groups = l3c_pmu_attr_groups;
++		break;
++	case PMU_TYPE_IOB:
++		pmu->attr_groups = iob_pmu_attr_groups;
++		break;
++	case PMU_TYPE_MCB:
++		if (!(xgene_pmu->mcb_active_mask & pmu->inf->enable_mask))
++			goto dev_err;
++		pmu->attr_groups = mcb_pmu_attr_groups;
++		break;
++	case PMU_TYPE_MC:
++		if (!(xgene_pmu->mc_active_mask & pmu->inf->enable_mask))
++			goto dev_err;
++		pmu->attr_groups = mc_pmu_attr_groups;
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	rc = xgene_init_perf(pmu, ctx->name);
++	if (rc) {
++		dev_err(dev, "%s PMU: Failed to init perf driver\n", ctx->name);
++		goto dev_err;
++	}
++
++	dev_info(dev, "%s PMU registered\n", ctx->name);
++
++	return rc;
++
++dev_err:
++	devm_kfree(dev, pmu);
++	return -ENODEV;
++}
++
++static void _xgene_pmu_isr(int irq, struct xgene_pmu_dev *pmu_dev)
++{
++	struct xgene_pmu *xgene_pmu = pmu_dev->parent;
++	u32 pmovsr;
++	int idx;
++
++	pmovsr = readl(pmu_dev->inf->csr + PMU_PMOVSR) & PMU_OVERFLOW_MASK;
++	if (!pmovsr)
++		return;
++
++	/* Clear interrupt flag */
++	if (xgene_pmu->version == PCP_PMU_V1)
++		writel(0x0, pmu_dev->inf->csr + PMU_PMOVSR);
++	else
++		writel(pmovsr, pmu_dev->inf->csr + PMU_PMOVSR);
++
++	for (idx = 0; idx < PMU_MAX_COUNTERS; idx++) {
++		struct perf_event *event = pmu_dev->pmu_counter_event[idx];
++		int overflowed = pmovsr & BIT(idx);
++
++		/* Ignore if we don't have an event. */
++		if (!event || !overflowed)
++			continue;
++		xgene_perf_event_update(event);
++		xgene_perf_event_set_period(event);
++	}
++}
++
++static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
++{
++	struct xgene_pmu_dev_ctx *ctx;
++	struct xgene_pmu *xgene_pmu = dev_id;
++	unsigned long flags;
++	u32 val;
++
++	raw_spin_lock_irqsave(&xgene_pmu->lock, flags);
++
++	/* Get Interrupt PMU source */
++	val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG);
++	if (val & PCPPMU_INT_MCU) {
++		list_for_each_entry(ctx, &xgene_pmu->mcpmus, next) {
++			_xgene_pmu_isr(irq, ctx->pmu_dev);
++		}
++	}
++	if (val & PCPPMU_INT_MCB) {
++		list_for_each_entry(ctx, &xgene_pmu->mcbpmus, next) {
++			_xgene_pmu_isr(irq, ctx->pmu_dev);
++		}
++	}
++	if (val & PCPPMU_INT_L3C) {
++		list_for_each_entry(ctx, &xgene_pmu->l3cpmus, next) {
++			_xgene_pmu_isr(irq, ctx->pmu_dev);
++		}
++	}
++	if (val & PCPPMU_INT_IOB) {
++		list_for_each_entry(ctx, &xgene_pmu->iobpmus, next) {
++			_xgene_pmu_isr(irq, ctx->pmu_dev);
++		}
++	}
++
++	raw_spin_unlock_irqrestore(&xgene_pmu->lock, flags);
++
++	return IRQ_HANDLED;
++}
++
++static int acpi_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu,
++					 struct platform_device *pdev)
++{
++	void __iomem *csw_csr, *mcba_csr, *mcbb_csr;
++	struct resource *res;
++	unsigned int reg;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
++	csw_csr = devm_ioremap_resource(&pdev->dev, res);
++	if (IS_ERR(csw_csr)) {
++		dev_err(&pdev->dev, "ioremap failed for CSW CSR resource\n");
++		return PTR_ERR(csw_csr);
++	}
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
++	mcba_csr = devm_ioremap_resource(&pdev->dev, res);
++	if (IS_ERR(mcba_csr)) {
++		dev_err(&pdev->dev, "ioremap failed for MCBA CSR resource\n");
++		return PTR_ERR(mcba_csr);
++	}
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
++	mcbb_csr = devm_ioremap_resource(&pdev->dev, res);
++	if (IS_ERR(mcbb_csr)) {
++		dev_err(&pdev->dev, "ioremap failed for MCBB CSR resource\n");
++		return PTR_ERR(mcbb_csr);
++	}
++
++	reg = readl(csw_csr + CSW_CSWCR);
++	if (reg & CSW_CSWCR_DUALMCB_MASK) {
++		/* Dual MCB active */
++		xgene_pmu->mcb_active_mask = 0x3;
++		/* Probe all active MC(s) */
++		reg = readl(mcbb_csr + CSW_CSWCR);
++		xgene_pmu->mc_active_mask =
++			(reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
++	} else {
++		/* Single MCB active */
++		xgene_pmu->mcb_active_mask = 0x1;
++		/* Probe all active MC(s) */
++		reg = readl(mcba_csr + CSW_CSWCR);
++		xgene_pmu->mc_active_mask =
++			(reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
++	}
++
++	return 0;
++}
++
++static int fdt_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu,
++					struct platform_device *pdev)
++{
++	struct regmap *csw_map, *mcba_map, *mcbb_map;
++	struct device_node *np = pdev->dev.of_node;
++	unsigned int reg;
++
++	csw_map = syscon_regmap_lookup_by_phandle(np, "regmap-csw");
++	if (IS_ERR(csw_map)) {
++		dev_err(&pdev->dev, "unable to get syscon regmap csw\n");
++		return PTR_ERR(csw_map);
++	}
++
++	mcba_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcba");
++	if (IS_ERR(mcba_map)) {
++		dev_err(&pdev->dev, "unable to get syscon regmap mcba\n");
++		return PTR_ERR(mcba_map);
++	}
++
++	mcbb_map = syscon_regmap_lookup_by_phandle(np, "regmap-mcbb");
++	if (IS_ERR(mcbb_map)) {
++		dev_err(&pdev->dev, "unable to get syscon regmap mcbb\n");
++		return PTR_ERR(mcbb_map);
++	}
++
++	if (regmap_read(csw_map, CSW_CSWCR, &reg))
++		return -EINVAL;
++
++	if (reg & CSW_CSWCR_DUALMCB_MASK) {
++		/* Dual MCB active */
++		xgene_pmu->mcb_active_mask = 0x3;
++		/* Probe all active MC(s) */
++		if (regmap_read(mcbb_map, MCBADDRMR, &reg))
++			return 0;
++		xgene_pmu->mc_active_mask =
++			(reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0xF : 0x5;
++	} else {
++		/* Single MCB active */
++		xgene_pmu->mcb_active_mask = 0x1;
++		/* Probe all active MC(s) */
++		if (regmap_read(mcba_map, MCBADDRMR, &reg))
++			return 0;
++		xgene_pmu->mc_active_mask =
++			(reg & MCBADDRMR_DUALMCU_MODE_MASK) ? 0x3 : 0x1;
++	}
++
++	return 0;
++}
++
++static int xgene_pmu_probe_active_mcb_mcu(struct xgene_pmu *xgene_pmu,
++					  struct platform_device *pdev)
++{
++	if (has_acpi_companion(&pdev->dev))
++		return acpi_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
++	return fdt_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
++}
++
++static char *xgene_pmu_dev_name(struct device *dev, u32 type, int id)
++{
++	switch (type) {
++	case PMU_TYPE_L3C:
++		return devm_kasprintf(dev, GFP_KERNEL, "l3c%d", id);
++	case PMU_TYPE_IOB:
++		return devm_kasprintf(dev, GFP_KERNEL, "iob%d", id);
++	case PMU_TYPE_MCB:
++		return devm_kasprintf(dev, GFP_KERNEL, "mcb%d", id);
++	case PMU_TYPE_MC:
++		return devm_kasprintf(dev, GFP_KERNEL, "mc%d", id);
++	default:
++		return devm_kasprintf(dev, GFP_KERNEL, "unknown");
++	}
++}
++
++#if defined(CONFIG_ACPI)
++static int acpi_pmu_dev_add_resource(struct acpi_resource *ares, void *data)
++{
++	struct resource *res = data;
++
++	if (ares->type == ACPI_RESOURCE_TYPE_FIXED_MEMORY32)
++		acpi_dev_resource_memory(ares, res);
++
++	/* Always tell the ACPI core to skip this resource */
++	return 1;
++}
++
++static struct
++xgene_pmu_dev_ctx *acpi_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
++				       struct acpi_device *adev, u32 type)
++{
++	struct device *dev = xgene_pmu->dev;
++	struct list_head resource_list;
++	struct xgene_pmu_dev_ctx *ctx;
++	const union acpi_object *obj;
++	struct hw_pmu_info *inf;
++	void __iomem *dev_csr;
++	struct resource res;
++	int enable_bit;
++	int rc;
++
++	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
++	if (!ctx)
++		return NULL;
++
++	INIT_LIST_HEAD(&resource_list);
++	rc = acpi_dev_get_resources(adev, &resource_list,
++				    acpi_pmu_dev_add_resource, &res);
++	acpi_dev_free_resource_list(&resource_list);
++	if (rc < 0 || IS_ERR(&res)) {
++		dev_err(dev, "PMU type %d: No resource address found\n", type);
++		goto err;
++	}
++
++	dev_csr = devm_ioremap_resource(dev, &res);
++	if (IS_ERR(dev_csr)) {
++		dev_err(dev, "PMU type %d: Fail to map resource\n", type);
++		goto err;
++	}
++
++	/* A PMU device node without enable-bit-index is always enabled */
++	rc = acpi_dev_get_property(adev, "enable-bit-index",
++				   ACPI_TYPE_INTEGER, &obj);
++	if (rc < 0)
++		enable_bit = 0;
++	else
++		enable_bit = (int) obj->integer.value;
++
++	ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
++	if (!ctx->name) {
++		dev_err(dev, "PMU type %d: Fail to get device name\n", type);
++		goto err;
++	}
++	inf = &ctx->inf;
++	inf->type = type;
++	inf->csr = dev_csr;
++	inf->enable_mask = 1 << enable_bit;
++
++	return ctx;
++err:
++	devm_kfree(dev, ctx);
++	return NULL;
++}
++
++static acpi_status acpi_pmu_dev_add(acpi_handle handle, u32 level,
++				    void *data, void **return_value)
++{
++	struct xgene_pmu *xgene_pmu = data;
++	struct xgene_pmu_dev_ctx *ctx;
++	struct acpi_device *adev;
++
++	if (acpi_bus_get_device(handle, &adev))
++		return AE_OK;
++	if (acpi_bus_get_status(adev) || !adev->status.present)
++		return AE_OK;
++
++	if (!strcmp(acpi_device_hid(adev), "APMC0D5D"))
++		ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_L3C);
++	else if (!strcmp(acpi_device_hid(adev), "APMC0D5E"))
++		ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_IOB);
++	else if (!strcmp(acpi_device_hid(adev), "APMC0D5F"))
++		ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_MCB);
++	else if (!strcmp(acpi_device_hid(adev), "APMC0D60"))
++		ctx = acpi_get_pmu_hw_inf(xgene_pmu, adev, PMU_TYPE_MC);
++	else
++		ctx = NULL;
++
++	if (!ctx)
++		return AE_OK;
++
++	if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
++		/* Can't add the PMU device, skip it */
++		devm_kfree(xgene_pmu->dev, ctx);
++		return AE_OK;
++	}
++
++	switch (ctx->inf.type) {
++	case PMU_TYPE_L3C:
++		list_add(&ctx->next, &xgene_pmu->l3cpmus);
++		break;
++	case PMU_TYPE_IOB:
++		list_add(&ctx->next, &xgene_pmu->iobpmus);
++		break;
++	case PMU_TYPE_MCB:
++		list_add(&ctx->next, &xgene_pmu->mcbpmus);
++		break;
++	case PMU_TYPE_MC:
++		list_add(&ctx->next, &xgene_pmu->mcpmus);
++		break;
++	}
++	return AE_OK;
++}
++
++static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
++				  struct platform_device *pdev)
++{
++	struct device *dev = xgene_pmu->dev;
++	acpi_handle handle;
++	acpi_status status;
++
++	handle = ACPI_HANDLE(dev);
++	if (!handle)
++		return -EINVAL;
++
++	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
++				     acpi_pmu_dev_add, NULL, xgene_pmu, NULL);
++	if (ACPI_FAILURE(status)) {
++		dev_err(dev, "failed to probe PMU devices\n");
++		return -ENODEV;
++	}
++
++	return 0;
++}
++#else
++static int acpi_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
++				  struct platform_device *pdev)
++{
++	return 0;
++}
++#endif
++
++static struct
++xgene_pmu_dev_ctx *fdt_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
++				      struct device_node *np, u32 type)
++{
++	struct device *dev = xgene_pmu->dev;
++	struct xgene_pmu_dev_ctx *ctx;
++	struct hw_pmu_info *inf;
++	void __iomem *dev_csr;
++	struct resource res;
++	int enable_bit;
++	int rc;
++
++	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
++	if (!ctx)
++		return NULL;
++	rc = of_address_to_resource(np, 0, &res);
++	if (rc < 0) {
++		dev_err(dev, "PMU type %d: No resource address found\n", type);
++		goto err;
++	}
++	dev_csr = devm_ioremap_resource(dev, &res);
++	if (IS_ERR(dev_csr)) {
++		dev_err(dev, "PMU type %d: Fail to map resource\n", type);
++		goto err;
++	}
++
++	/* A PMU device node without enable-bit-index is always enabled */
++	if (of_property_read_u32(np, "enable-bit-index", &enable_bit))
++		enable_bit = 0;
++
++	ctx->name = xgene_pmu_dev_name(dev, type, enable_bit);
++	if (!ctx->name) {
++		dev_err(dev, "PMU type %d: Fail to get device name\n", type);
++		goto err;
++	}
++	inf = &ctx->inf;
++	inf->type = type;
++	inf->csr = dev_csr;
++	inf->enable_mask = 1 << enable_bit;
++
++	return ctx;
++err:
++	devm_kfree(dev, ctx);
++	return NULL;
++}
++
++static int fdt_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
++				 struct platform_device *pdev)
++{
++	struct xgene_pmu_dev_ctx *ctx;
++	struct device_node *np;
++
++	for_each_child_of_node(pdev->dev.of_node, np) {
++		if (!of_device_is_available(np))
++			continue;
++
++		if (of_device_is_compatible(np, "apm,xgene-pmu-l3c"))
++			ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_L3C);
++		else if (of_device_is_compatible(np, "apm,xgene-pmu-iob"))
++			ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_IOB);
++		else if (of_device_is_compatible(np, "apm,xgene-pmu-mcb"))
++			ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MCB);
++		else if (of_device_is_compatible(np, "apm,xgene-pmu-mc"))
++			ctx = fdt_get_pmu_hw_inf(xgene_pmu, np, PMU_TYPE_MC);
++		else
++			ctx = NULL;
++
++		if (!ctx)
++			continue;
++
++		if (xgene_pmu_dev_add(xgene_pmu, ctx)) {
++			/* Can't add the PMU device, skip it */
++			devm_kfree(xgene_pmu->dev, ctx);
++			continue;
++		}
++
++		switch (ctx->inf.type) {
++		case PMU_TYPE_L3C:
++			list_add(&ctx->next, &xgene_pmu->l3cpmus);
++			break;
++		case PMU_TYPE_IOB:
++			list_add(&ctx->next, &xgene_pmu->iobpmus);
++			break;
++		case PMU_TYPE_MCB:
++			list_add(&ctx->next, &xgene_pmu->mcbpmus);
++			break;
++		case PMU_TYPE_MC:
++			list_add(&ctx->next, &xgene_pmu->mcpmus);
++			break;
++		}
++	}
++
++	return 0;
++}
++
++static int xgene_pmu_probe_pmu_dev(struct xgene_pmu *xgene_pmu,
++				   struct platform_device *pdev)
++{
++	if (has_acpi_companion(&pdev->dev))
++		return acpi_pmu_probe_pmu_dev(xgene_pmu, pdev);
++	return fdt_pmu_probe_pmu_dev(xgene_pmu, pdev);
++}
++
++static const struct xgene_pmu_data xgene_pmu_data = {
++	.id   = PCP_PMU_V1,
++};
++
++static const struct xgene_pmu_data xgene_pmu_v2_data = {
++	.id   = PCP_PMU_V2,
++};
++
++static const struct of_device_id xgene_pmu_of_match[] = {
++	{ .compatible	= "apm,xgene-pmu",	.data = &xgene_pmu_data },
++	{ .compatible	= "apm,xgene-pmu-v2",	.data = &xgene_pmu_v2_data },
++	{},
++};
++MODULE_DEVICE_TABLE(of, xgene_pmu_of_match);
++#ifdef CONFIG_ACPI
++static const struct acpi_device_id xgene_pmu_acpi_match[] = {
++	{"APMC0D5B", PCP_PMU_V1},
++	{"APMC0D5C", PCP_PMU_V2},
++	{},
++};
++MODULE_DEVICE_TABLE(acpi, xgene_pmu_acpi_match);
++#endif
++
++static int xgene_pmu_probe(struct platform_device *pdev)
++{
++	const struct xgene_pmu_data *dev_data;
++	const struct of_device_id *of_id;
++	struct xgene_pmu *xgene_pmu;
++	struct resource *res;
++	int irq, rc;
++	int version;
++
++	xgene_pmu = devm_kzalloc(&pdev->dev, sizeof(*xgene_pmu), GFP_KERNEL);
++	if (!xgene_pmu)
++		return -ENOMEM;
++	xgene_pmu->dev = &pdev->dev;
++	platform_set_drvdata(pdev, xgene_pmu);
++
++	version = -EINVAL;
++	of_id = of_match_device(xgene_pmu_of_match, &pdev->dev);
++	if (of_id) {
++		dev_data = (const struct xgene_pmu_data *) of_id->data;
++		version = dev_data->id;
++	}
++
++#ifdef CONFIG_ACPI
++	if (ACPI_COMPANION(&pdev->dev)) {
++		const struct acpi_device_id *acpi_id;
++
++		acpi_id = acpi_match_device(xgene_pmu_acpi_match, &pdev->dev);
++		if (acpi_id)
++			version = (int) acpi_id->driver_data;
++	}
++#endif
++	if (version < 0)
++		return -ENODEV;
++
++	INIT_LIST_HEAD(&xgene_pmu->l3cpmus);
++	INIT_LIST_HEAD(&xgene_pmu->iobpmus);
++	INIT_LIST_HEAD(&xgene_pmu->mcbpmus);
++	INIT_LIST_HEAD(&xgene_pmu->mcpmus);
++
++	xgene_pmu->version = version;
++	dev_info(&pdev->dev, "X-Gene PMU version %d\n", xgene_pmu->version);
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	xgene_pmu->pcppmu_csr = devm_ioremap_resource(&pdev->dev, res);
++	if (IS_ERR(xgene_pmu->pcppmu_csr)) {
++		dev_err(&pdev->dev, "ioremap failed for PCP PMU resource\n");
++		rc = PTR_ERR(xgene_pmu->pcppmu_csr);
++		goto err;
++	}
++
++	irq = platform_get_irq(pdev, 0);
++	if (irq < 0) {
++		dev_err(&pdev->dev, "No IRQ resource\n");
++		rc = -EINVAL;
++		goto err;
++	}
++	rc = devm_request_irq(&pdev->dev, irq, xgene_pmu_isr,
++				IRQF_NOBALANCING | IRQF_NO_THREAD,
++				dev_name(&pdev->dev), xgene_pmu);
++	if (rc) {
++		dev_err(&pdev->dev, "Could not request IRQ %d\n", irq);
++		goto err;
++	}
++
++	raw_spin_lock_init(&xgene_pmu->lock);
++
++	/* Check for active MCBs and MCUs */
++	rc = xgene_pmu_probe_active_mcb_mcu(xgene_pmu, pdev);
++	if (rc) {
++		dev_warn(&pdev->dev, "Unknown MCB/MCU active status\n");
++		xgene_pmu->mcb_active_mask = 0x1;
++		xgene_pmu->mc_active_mask = 0x1;
++	}
++
++	/* Pick one core to use for cpumask attributes */
++	cpumask_set_cpu(smp_processor_id(), &xgene_pmu->cpu);
++
++	/* Make sure that the overflow interrupt is handled by this CPU */
++	rc = irq_set_affinity(irq, &xgene_pmu->cpu);
++	if (rc) {
++		dev_err(&pdev->dev, "Failed to set interrupt affinity!\n");
++		goto err;
++	}
++
++	/* Walk through the tree for all PMU perf devices */
++	rc = xgene_pmu_probe_pmu_dev(xgene_pmu, pdev);
++	if (rc) {
++		dev_err(&pdev->dev, "No PMU perf devices found!\n");
++		goto err;
++	}
++
++	/* Enable interrupt */
++	xgene_pmu_unmask_int(xgene_pmu);
++
++	return 0;
++
++err:
++	if (xgene_pmu->pcppmu_csr)
++		devm_iounmap(&pdev->dev, xgene_pmu->pcppmu_csr);
++	devm_kfree(&pdev->dev, xgene_pmu);
++
++	return rc;
++}
++
++static void
++xgene_pmu_dev_cleanup(struct xgene_pmu *xgene_pmu, struct list_head *pmus)
++{
++	struct xgene_pmu_dev_ctx *ctx;
++	struct device *dev = xgene_pmu->dev;
++	struct xgene_pmu_dev *pmu_dev;
++
++	list_for_each_entry(ctx, pmus, next) {
++		pmu_dev = ctx->pmu_dev;
++		if (pmu_dev->inf->csr)
++			devm_iounmap(dev, pmu_dev->inf->csr);
++		devm_kfree(dev, ctx);
++		devm_kfree(dev, pmu_dev);
++	}
++}
++
++static int xgene_pmu_remove(struct platform_device *pdev)
++{
++	struct xgene_pmu *xgene_pmu = dev_get_drvdata(&pdev->dev);
++
++	xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->l3cpmus);
++	xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->iobpmus);
++	xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcbpmus);
++	xgene_pmu_dev_cleanup(xgene_pmu, &xgene_pmu->mcpmus);
++
++	if (xgene_pmu->pcppmu_csr)
++		devm_iounmap(&pdev->dev, xgene_pmu->pcppmu_csr);
++	devm_kfree(&pdev->dev, xgene_pmu);
++
++	return 0;
++}
++
++static struct platform_driver xgene_pmu_driver = {
++	.probe = xgene_pmu_probe,
++	.remove = xgene_pmu_remove,
++	.driver = {
++		.name		= "xgene-pmu",
++		.of_match_table = xgene_pmu_of_match,
++		.acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
++	},
++};
++
++builtin_platform_driver(xgene_pmu_driver);
+-- 
+1.8.3.1
+
diff --git a/SOURCES/1008-perf-xgene-Remove-bogus-IS_ERR-check.patch b/SOURCES/1008-perf-xgene-Remove-bogus-IS_ERR-check.patch
new file mode 100644
index 0000000..5d7b0d1
--- /dev/null
+++ b/SOURCES/1008-perf-xgene-Remove-bogus-IS_ERR-check.patch
@@ -0,0 +1,39 @@
+From da17db043d86fe330c0d437a3ea22e6b30834d35 Mon Sep 17 00:00:00 2001
+From: Tai Nguyen <ttnguyen at apm.com>
+Date: Thu, 13 Oct 2016 11:09:16 -0700
+Subject: [PATCH 1008/1018] perf: xgene: Remove bogus IS_ERR() check
+
+In acpi_get_pmu_hw_inf we pass the address of a local variable to IS_ERR(),
+which doesn't make sense, as the pointer must be a real, valid pointer.
+This doesn't cause a functional problem, as IS_ERR() will evaluate as
+false, but the check is bogus and causes static checkers to complain.
+
+Remove the bogus check.
+
+The bug is reported by Dan Carpenter <dan.carpenter at oracle.com> in [1]
+
+[1] https://www.spinics.net/lists/arm-kernel/msg535957.html
+
+Signed-off-by: Tai Nguyen <ttnguyen at apm.com>
+Acked-by: Mark Rutland <mark.rutland at arm.com>
+Signed-off-by: Will Deacon <will.deacon at arm.com>
+---
+ drivers/perf/xgene_pmu.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c
+index c2ac764..a8ac4bc 100644
+--- a/drivers/perf/xgene_pmu.c
++++ b/drivers/perf/xgene_pmu.c
+@@ -1011,7 +1011,7 @@ xgene_pmu_dev_ctx *acpi_get_pmu_hw_inf(struct xgene_pmu *xgene_pmu,
+ 	rc = acpi_dev_get_resources(adev, &resource_list,
+ 				    acpi_pmu_dev_add_resource, &res);
+ 	acpi_dev_free_resource_list(&resource_list);
+-	if (rc < 0 || IS_ERR(&res)) {
++	if (rc < 0) {
+ 		dev_err(dev, "PMU type %d: No resource address found\n", type);
+ 		goto err;
+ 	}
+-- 
+1.8.3.1
+
diff --git a/SOURCES/1009-MAINTAINERS-Add-entry-for-APM-X-Gene-SoC-PMU-driver.patch b/SOURCES/1009-MAINTAINERS-Add-entry-for-APM-X-Gene-SoC-PMU-driver.patch
new file mode 100644
index 0000000..323d81a
--- /dev/null
+++ b/SOURCES/1009-MAINTAINERS-Add-entry-for-APM-X-Gene-SoC-PMU-driver.patch
@@ -0,0 +1,34 @@
+From da178c12d0a9acfe1123b6c4c9339e1d86d7d25b Mon Sep 17 00:00:00 2001
+From: Tai Nguyen <ttnguyen at apm.com>
+Date: Fri, 15 Jul 2016 10:38:02 -0700
+Subject: [PATCH 1009/1018] MAINTAINERS: Add entry for APM X-Gene SoC PMU
+ driver
+
+This patch adds the MAINTAINERS entry for APM X-Gene SoC PMU driver.
+
+Signed-off-by: Tai Nguyen <ttnguyen at apm.com>
+---
+ MAINTAINERS | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/MAINTAINERS b/MAINTAINERS
+index 7167fb4..5e20026 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -810,6 +810,13 @@ F:	drivers/net/phy/mdio-xgene.c
+ F:	Documentation/devicetree/bindings/net/apm-xgene-enet.txt
+ F:	Documentation/devicetree/bindings/net/apm-xgene-mdio.txt
+ 
++APPLIED MICRO (APM) X-GENE SOC PMU
++M:	Tai Nguyen <ttnguyen at apm.com>
++S:	Supported
++F:	drivers/perf/xgene_pmu.c
++F:	Documentation/perf/xgene-pmu.txt
++F:	Documentation/devicetree/bindings/perf/apm-xgene-pmu.txt
++
+ APTINA CAMERA SENSOR PLL
+ M:	Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
+ L:	linux-media at vger.kernel.org
+-- 
+1.8.3.1
+
diff --git a/SOURCES/config-centos-sig b/SOURCES/config-centos-sig
index 9d17fb7..4cdaedb 100644
--- a/SOURCES/config-centos-sig
+++ b/SOURCES/config-centos-sig
@@ -5,3 +5,4 @@ CONFIG_QCOM_FALKOR_ERRATUM_E1003=y
 CONFIG_QCOM_FALKOR_ERRATUM_E1009=y
 CONFIG_ACPI_CPPC_CPUFREQ=y
 CONFIG_SENSORS_XGENE=y
+CONFIG_XGENE_PMU=y
diff --git a/SPECS/kernel-aarch64.spec b/SPECS/kernel-aarch64.spec
index 2dcb885..626eba4 100644
--- a/SPECS/kernel-aarch64.spec
+++ b/SPECS/kernel-aarch64.spec
@@ -331,6 +331,9 @@ Patch1003: 1003-mailbox-PCC-Fix-return-value-of-pcc_mbox_request_cha.patch
 Patch1004: 1004-Documentation-dtb-xgene-Add-hwmon-dts-binding-docume.patch
 Patch1005: 1005-hwmon-Add-xgene-hwmon-driver.patch
 Patch1006: 1006-hwmon-xgene-Fix-crash-when-alarm-occurs-before-drive.patch
+Patch1007: 1007-perf-xgene-Add-APM-X-Gene-SoC-Performance-Monitoring.patch
+Patch1008: 1008-perf-xgene-Remove-bogus-IS_ERR-check.patch
+Patch1009: 1009-MAINTAINERS-Add-entry-for-APM-X-Gene-SoC-PMU-driver.patch
 
 # QDF2400 Patches
 Patch4000: 4000-arm64-Define-Qualcomm-Technologies-ARMv8-CPU.patch
@@ -672,6 +675,9 @@ git am %{PATCH1003}
 git am %{PATCH1004}
 git am %{PATCH1005}
 git am %{PATCH1006}
+git am %{PATCH1007}
+git am %{PATCH1008}
+git am %{PATCH1009}
 
 # Apply QDF2400 patches
 git am %{PATCH4000}
@@ -1451,6 +1457,7 @@ fi
 
 %changelog
 * Thu Nov 10 2016 Duc Dang <dhdang at apm.com> [4.5.0-17.el7]
+- Add X-Gene SoC PMU support
 - Add X-Gene HWMon support
 - mailbox: PCC: Fix return value of pcc_mbox_request_channel
 - Add cpufreq CPPC bug fixes
-- 
1.8.3.1