Merge 090c2c57 on remote branch

Qualcomm Technologies, Inc. l2 Cache counters

=============================================

This driver supports the L2 cache clusters counters found in

Qualcomm Technologies, Inc.

There are multiple physical L2 cache clusters, each with their

own counters. Each cluster has one or more CPUs associated with it.

There is one logical L2 PMU exposed, which aggregates the results from

the physical PMUs(counters).

The driver provides a description of its available events and configuration

options in sysfs, see /sys/devices/l2cache_counters.

The "format" directory describes the format of the events.

And format is of the form 0xXXX

Where,

  1 bit(lsb) for group (group is either txn/tenure counter).

  4 bits for serial number for counter starting from 0 to 8.

  5 bits for bit position of counter enable bit in a register.

The driver provides a "cpumask" sysfs attribute which contains a mask

consisting of one CPU per cluster which will be used to handle all the PMU

events on that cluster.

Examples for use with perf:

  perf stat -e l2cache_counters/ddr_read/,l2cache_counters/ddr_write/ -a sleep 1

  perf stat -e l2cache_counters/cycles/ -C 2 sleep 1

Limitation: The driver does not support sampling, therefore "perf record" will

not work. Per-task perf sessions are not supported.

For transaction counters we don't need to set any configuration

before monitoring.

For tenure counter use case, we need to set threshold value of low and mid

range occurrence counter value of cluster(as these occurrence counter exist

for each cluster) in sysfs.

echo 1 > /sys/bus/eventsource/devices/l2cache_counters/which_cluster_tenure

echo X > /sys/bus/event_source/devices/l2cache_counters/low_tenure_threshold

echo Y > /sys/bus/event_source/devices/l2cache_counters/mid_tenure_threshold

Here, X < Y

e.g:

  perf stat -e l2cache_counters/low_range_occur/ -e

  l2cache_counters/mid_range_occur/ -e l2cache_counters/high_range

  _occur/ -C 4 sleep 10

 Performance counter stats for 'CPU(s) 4':

                 7      l2cache_counters/low_range_occur/

                 5      l2cache_counters/mid_range_occur/

                 7      l2cache_counters/high_range_occur/

      10.204140400 seconds time elapsed

	select HAVE_SYSCALL_TRACEPOINTS

	select HAVE_UID16

	select HAVE_VIRT_CPU_ACCOUNTING_GEN

	select IOMMU_DMA if IOMMU_SUPPORT

	select IRQ_FORCED_THREADING

	select MODULES_USE_ELF_REL

	select NEED_DMA_MAP_STATE

	  Disabling this is usually safe for small single-platform

	  configurations. If unsure, say y.

choice

	prompt "Virtual Memory Reclaim"

	default ENABLE_VMALLOC_SAVING

	help

	  Select the method of reclaiming virtual memory. Two values

	  are allowed to choose, one is NO_VM_RECLAIM, the other is

	  ENABLE_VMALLOC_SAVING.

	  If you are not absolutely sure what you are doing, leave this

	  option alone.

config ENABLE_VMALLOC_SAVING

	bool "Reclaim memory for each subsystem"

	help

	  Enable this config to reclaim the virtual space belonging

	  to any subsystem which is expected to have a lifetime of

	  the entire system. This feature allows lowmem to be non-

	  contiguous.

config NO_VM_RECLAIM

	bool "Do not reclaim memory"

	help

	  Do not reclaim any memory. This might result in less lowmem

	  and wasting some virtual memory space which could otherwise

	  be reclaimed by using any of the other two config options as

	  above.

endchoice

config FORCE_MAX_ZONEORDER

	int "Maximum zone order"

	default "12" if SOC_AM33XX

CONFIG_STAGING=y

CONFIG_ASHMEM=y

CONFIG_ION=y

CONFIG_ION_POOL_AUTO_REFILL=y

CONFIG_QPNP_REVID=y

CONFIG_SPS=y

CONFIG_SPS_SUPPORT_NDP_BAM=y

CONFIG_MAILBOX=y

CONFIG_QCOM_APCS_IPC=y

CONFIG_MSM_QMP=y

CONFIG_IOMMU_IO_PGTABLE_FAST=y

CONFIG_ARM_SMMU=y

CONFIG_QCOM_LAZY_MAPPING=y

CONFIG_IOMMU_DEBUG=y

CONFIG_QCOM_SMEM=y

CONFIG_QCOM_SMD_RPM=y

CONFIG_QCOM_EARLY_RANDOM=y

CONFIG_QCOM_MEMORY_DUMP_V2=y

CONFIG_QCOM_SMP2P=y

CONFIG_SETUP_SSR_NOTIF_TIMEOUTS=y

CONFIG_SSR_SYSMON_NOTIF_TIMEOUT=20000

CONFIG_MSM_BOOT_STATS=y

CONFIG_QCOM_DCC_V2=y

CONFIG_QCOM_EUD=y

CONFIG_QCOM_MINIDUMP=y

CONFIG_QCOM_FSA4480_I2C=y

CONFIG_QCOM_WATCHDOG_V2=y

CONFIG_QCOM_FORCE_WDOG_BITE_ON_PANIC=y

CONFIG_QTEE_SHM_BRIDGE=y

CONFIG_MEM_SHARE_QMI_SERVICE=y

CONFIG_QMP_DEBUGFS_CLIENT=y

CONFIG_QCOM_CDSP_RM=y

CONFIG_QCOM_QHEE_ENABLE_MEM_PROTECTION=y

CONFIG_QCOM_CX_IPEAK=y

CONFIG_ICNSS=y

CONFIG_CORESIGHT_DYNAMIC_REPLICATOR=y

CONFIG_CORESIGHT_STM=y

CONFIG_CORESIGHT_CTI=y

CONFIG_CORESIGHT_CTI_SAVE_DISABLE=y

CONFIG_CORESIGHT_TPDA=y

CONFIG_CORESIGHT_TPDM=y

CONFIG_CORESIGHT_HWEVENT=y

# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set

CONFIG_CLEANCACHE=y

CONFIG_CMA=y

CONFIG_CMA_DEBUG=y

CONFIG_CMA_DEBUGFS=y

CONFIG_CMA_ALLOW_WRITE_DEBUGFS=y

CONFIG_ZSMALLOC=y

CONFIG_STAGING=y

CONFIG_ASHMEM=y

CONFIG_ION=y

CONFIG_ION_POOL_AUTO_REFILL=y

CONFIG_QPNP_REVID=y

CONFIG_SPS=y

CONFIG_SPS_SUPPORT_NDP_BAM=y

CONFIG_MAILBOX=y

CONFIG_QCOM_APCS_IPC=y

CONFIG_MSM_QMP=y

CONFIG_IOMMU_IO_PGTABLE_FAST=y

CONFIG_ARM_SMMU=y

CONFIG_IOMMU_TLBSYNC_DEBUG=y

CONFIG_ARM_SMMU_TESTBUS_DUMP=y

CONFIG_QCOM_LAZY_MAPPING=y

CONFIG_IOMMU_DEBUG=y

CONFIG_QCOM_SMEM=y

CONFIG_QCOM_SMD_RPM=y

CONFIG_QCOM_EARLY_RANDOM=y

CONFIG_QCOM_MEMORY_DUMP_V2=y

CONFIG_QCOM_SMP2P=y

CONFIG_SETUP_SSR_NOTIF_TIMEOUTS=y

CONFIG_SSR_SYSMON_NOTIF_TIMEOUT=20000

CONFIG_MSM_BOOT_STATS=y

CONFIG_QCOM_DCC_V2=y

CONFIG_QCOM_EUD=y

CONFIG_QCOM_MINIDUMP=y

CONFIG_MSM_CORE_HANG_DETECT=y

CONFIG_MSM_GLADIATOR_HANG_DETECT=y

CONFIG_MSM_GLADIATOR_ERP=y

CONFIG_QTEE_SHM_BRIDGE=y

CONFIG_MEM_SHARE_QMI_SERVICE=y

CONFIG_QMP_DEBUGFS_CLIENT=y

CONFIG_QCOM_CDSP_RM=y

CONFIG_QCOM_QHEE_ENABLE_MEM_PROTECTION=y

CONFIG_QCOM_CX_IPEAK=y

CONFIG_ICNSS=y

CONFIG_MAGIC_SYSRQ=y

CONFIG_DEBUG_PAGEALLOC=y

CONFIG_SLUB_DEBUG_PANIC_ON=y

CONFIG_DEBUG_PANIC_ON_OOM=y

CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT=y

CONFIG_PAGE_POISONING_ENABLE_DEFAULT=y

CONFIG_DEBUG_OBJECTS=y

#include <linux/types.h>

#define COMMAND_LINE_SIZE 1024

#define COMMAND_LINE_SIZE 2048

/* The list ends with an ATAG_NONE node. */

#define ATAG_NONE	0x00000000