2011-09-23 18:29:55 -06:00
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/*
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* Linux performance counter support for MIPS.
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*
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* Copyright (C) 2010 MIPS Technologies, Inc.
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2011-09-23 18:29:55 -06:00
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* Copyright (C) 2011 Cavium Networks, Inc.
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2011-09-23 18:29:55 -06:00
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* Author: Deng-Cheng Zhu
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*
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* This code is based on the implementation for ARM, which is in turn
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* based on the sparc64 perf event code and the x86 code. Performance
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* counter access is based on the MIPS Oprofile code. And the callchain
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* support references the code of MIPS stacktrace.c.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/cpumask.h>
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#include <linux/interrupt.h>
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#include <linux/smp.h>
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#include <linux/kernel.h>
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#include <linux/perf_event.h>
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#include <linux/uaccess.h>
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#include <asm/irq.h>
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#include <asm/irq_regs.h>
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#include <asm/stacktrace.h>
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#include <asm/time.h> /* For perf_irq */
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#define MIPS_MAX_HWEVENTS 4
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struct cpu_hw_events {
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/* Array of events on this cpu. */
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struct perf_event *events[MIPS_MAX_HWEVENTS];
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/*
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* Set the bit (indexed by the counter number) when the counter
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* is used for an event.
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*/
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unsigned long used_mask[BITS_TO_LONGS(MIPS_MAX_HWEVENTS)];
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/*
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* Software copy of the control register for each performance counter.
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* MIPS CPUs vary in performance counters. They use this differently,
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* and even may not use it.
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*/
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unsigned int saved_ctrl[MIPS_MAX_HWEVENTS];
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};
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DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events) = {
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.saved_ctrl = {0},
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};
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/* The description of MIPS performance events. */
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struct mips_perf_event {
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unsigned int event_id;
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/*
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* MIPS performance counters are indexed starting from 0.
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* CNTR_EVEN indicates the indexes of the counters to be used are
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* even numbers.
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*/
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unsigned int cntr_mask;
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#define CNTR_EVEN 0x55555555
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#define CNTR_ODD 0xaaaaaaaa
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2011-09-23 18:29:55 -06:00
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#define CNTR_ALL 0xffffffff
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2011-09-23 18:29:55 -06:00
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#ifdef CONFIG_MIPS_MT_SMP
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enum {
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T = 0,
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V = 1,
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P = 2,
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} range;
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#else
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#define T
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#define V
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#define P
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#endif
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};
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static struct mips_perf_event raw_event;
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static DEFINE_MUTEX(raw_event_mutex);
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#define C(x) PERF_COUNT_HW_CACHE_##x
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struct mips_pmu {
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2011-09-23 18:29:55 -06:00
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u64 max_period;
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u64 valid_count;
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u64 overflow;
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2011-09-23 18:29:55 -06:00
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const char *name;
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int irq;
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u64 (*read_counter)(unsigned int idx);
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void (*write_counter)(unsigned int idx, u64 val);
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const struct mips_perf_event *(*map_raw_event)(u64 config);
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const struct mips_perf_event (*general_event_map)[PERF_COUNT_HW_MAX];
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const struct mips_perf_event (*cache_event_map)
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[PERF_COUNT_HW_CACHE_MAX]
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[PERF_COUNT_HW_CACHE_OP_MAX]
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[PERF_COUNT_HW_CACHE_RESULT_MAX];
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unsigned int num_counters;
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};
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2011-09-23 18:29:55 -06:00
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static struct mips_pmu mipspmu;
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#define M_CONFIG1_PC (1 << 4)
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#define M_PERFCTL_EXL (1 << 0)
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#define M_PERFCTL_KERNEL (1 << 1)
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#define M_PERFCTL_SUPERVISOR (1 << 2)
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#define M_PERFCTL_USER (1 << 3)
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#define M_PERFCTL_INTERRUPT_ENABLE (1 << 4)
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#define M_PERFCTL_EVENT(event) (((event) & 0x3ff) << 5)
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#define M_PERFCTL_VPEID(vpe) ((vpe) << 16)
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#define M_PERFCTL_MT_EN(filter) ((filter) << 20)
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#define M_TC_EN_ALL M_PERFCTL_MT_EN(0)
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#define M_TC_EN_VPE M_PERFCTL_MT_EN(1)
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#define M_TC_EN_TC M_PERFCTL_MT_EN(2)
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#define M_PERFCTL_TCID(tcid) ((tcid) << 22)
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#define M_PERFCTL_WIDE (1 << 30)
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#define M_PERFCTL_MORE (1 << 31)
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#define M_PERFCTL_COUNT_EVENT_WHENEVER (M_PERFCTL_EXL | \
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M_PERFCTL_KERNEL | \
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M_PERFCTL_USER | \
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M_PERFCTL_SUPERVISOR | \
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M_PERFCTL_INTERRUPT_ENABLE)
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#ifdef CONFIG_MIPS_MT_SMP
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#define M_PERFCTL_CONFIG_MASK 0x3fff801f
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#else
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#define M_PERFCTL_CONFIG_MASK 0x1f
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#endif
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#define M_PERFCTL_EVENT_MASK 0xfe0
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#ifdef CONFIG_MIPS_MT_SMP
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static int cpu_has_mipsmt_pertccounters;
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static DEFINE_RWLOCK(pmuint_rwlock);
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/*
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* FIXME: For VSMP, vpe_id() is redefined for Perf-events, because
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* cpu_data[cpuid].vpe_id reports 0 for _both_ CPUs.
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*/
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#if defined(CONFIG_HW_PERF_EVENTS)
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#define vpe_id() (cpu_has_mipsmt_pertccounters ? \
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0 : smp_processor_id())
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#else
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#define vpe_id() (cpu_has_mipsmt_pertccounters ? \
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0 : cpu_data[smp_processor_id()].vpe_id)
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#endif
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/* Copied from op_model_mipsxx.c */
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static unsigned int vpe_shift(void)
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{
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if (num_possible_cpus() > 1)
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return 1;
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return 0;
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}
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static unsigned int counters_total_to_per_cpu(unsigned int counters)
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{
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return counters >> vpe_shift();
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}
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#else /* !CONFIG_MIPS_MT_SMP */
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#define vpe_id() 0
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#endif /* CONFIG_MIPS_MT_SMP */
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static void resume_local_counters(void);
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static void pause_local_counters(void);
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static irqreturn_t mipsxx_pmu_handle_irq(int, void *);
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static int mipsxx_pmu_handle_shared_irq(void);
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static unsigned int mipsxx_pmu_swizzle_perf_idx(unsigned int idx)
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{
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if (vpe_id() == 1)
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idx = (idx + 2) & 3;
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return idx;
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}
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static u64 mipsxx_pmu_read_counter(unsigned int idx)
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{
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idx = mipsxx_pmu_swizzle_perf_idx(idx);
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switch (idx) {
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case 0:
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/*
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* The counters are unsigned, we must cast to truncate
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* off the high bits.
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*/
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return (u32)read_c0_perfcntr0();
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case 1:
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return (u32)read_c0_perfcntr1();
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case 2:
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return (u32)read_c0_perfcntr2();
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case 3:
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return (u32)read_c0_perfcntr3();
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default:
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WARN_ONCE(1, "Invalid performance counter number (%d)\n", idx);
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return 0;
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}
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}
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static u64 mipsxx_pmu_read_counter_64(unsigned int idx)
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{
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idx = mipsxx_pmu_swizzle_perf_idx(idx);
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switch (idx) {
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case 0:
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return read_c0_perfcntr0_64();
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case 1:
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return read_c0_perfcntr1_64();
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case 2:
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return read_c0_perfcntr2_64();
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case 3:
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return read_c0_perfcntr3_64();
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default:
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WARN_ONCE(1, "Invalid performance counter number (%d)\n", idx);
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return 0;
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}
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}
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static void mipsxx_pmu_write_counter(unsigned int idx, u64 val)
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{
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idx = mipsxx_pmu_swizzle_perf_idx(idx);
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switch (idx) {
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case 0:
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write_c0_perfcntr0(val);
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return;
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case 1:
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write_c0_perfcntr1(val);
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return;
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case 2:
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write_c0_perfcntr2(val);
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return;
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case 3:
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write_c0_perfcntr3(val);
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return;
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}
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}
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static void mipsxx_pmu_write_counter_64(unsigned int idx, u64 val)
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{
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idx = mipsxx_pmu_swizzle_perf_idx(idx);
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switch (idx) {
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case 0:
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write_c0_perfcntr0_64(val);
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return;
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case 1:
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write_c0_perfcntr1_64(val);
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return;
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case 2:
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write_c0_perfcntr2_64(val);
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return;
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case 3:
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write_c0_perfcntr3_64(val);
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return;
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}
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}
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static unsigned int mipsxx_pmu_read_control(unsigned int idx)
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{
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idx = mipsxx_pmu_swizzle_perf_idx(idx);
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switch (idx) {
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case 0:
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return read_c0_perfctrl0();
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case 1:
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return read_c0_perfctrl1();
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case 2:
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return read_c0_perfctrl2();
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case 3:
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return read_c0_perfctrl3();
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default:
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WARN_ONCE(1, "Invalid performance counter number (%d)\n", idx);
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return 0;
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}
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}
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static void mipsxx_pmu_write_control(unsigned int idx, unsigned int val)
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{
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idx = mipsxx_pmu_swizzle_perf_idx(idx);
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switch (idx) {
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case 0:
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write_c0_perfctrl0(val);
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return;
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case 1:
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write_c0_perfctrl1(val);
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return;
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case 2:
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write_c0_perfctrl2(val);
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return;
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case 3:
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write_c0_perfctrl3(val);
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return;
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}
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}
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static int mipsxx_pmu_alloc_counter(struct cpu_hw_events *cpuc,
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struct hw_perf_event *hwc)
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{
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int i;
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/*
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* We only need to care the counter mask. The range has been
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* checked definitely.
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*/
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unsigned long cntr_mask = (hwc->event_base >> 8) & 0xffff;
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for (i = mipspmu.num_counters - 1; i >= 0; i--) {
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/*
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* Note that some MIPS perf events can be counted by both
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* even and odd counters, wheresas many other are only by
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* even _or_ odd counters. This introduces an issue that
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* when the former kind of event takes the counter the
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* latter kind of event wants to use, then the "counter
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* allocation" for the latter event will fail. In fact if
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* they can be dynamically swapped, they both feel happy.
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* But here we leave this issue alone for now.
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*/
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if (test_bit(i, &cntr_mask) &&
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!test_and_set_bit(i, cpuc->used_mask))
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return i;
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}
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return -EAGAIN;
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}
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static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
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{
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struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
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WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
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cpuc->saved_ctrl[idx] = M_PERFCTL_EVENT(evt->event_base & 0xff) |
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(evt->config_base & M_PERFCTL_CONFIG_MASK) |
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/* Make sure interrupt enabled. */
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M_PERFCTL_INTERRUPT_ENABLE;
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/*
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* We do not actually let the counter run. Leave it until start().
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*/
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}
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static void mipsxx_pmu_disable_event(int idx)
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{
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struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
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unsigned long flags;
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WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
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local_irq_save(flags);
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cpuc->saved_ctrl[idx] = mipsxx_pmu_read_control(idx) &
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~M_PERFCTL_COUNT_EVENT_WHENEVER;
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mipsxx_pmu_write_control(idx, cpuc->saved_ctrl[idx]);
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local_irq_restore(flags);
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}
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2011-09-23 18:29:55 -06:00
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static int mipspmu_event_set_period(struct perf_event *event,
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struct hw_perf_event *hwc,
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int idx)
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{
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2011-09-23 18:29:55 -06:00
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u64 left = local64_read(&hwc->period_left);
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u64 period = hwc->sample_period;
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2011-09-23 18:29:55 -06:00
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int ret = 0;
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
if (unlikely((left + period) & (1ULL << 63))) {
|
|
|
|
/* left underflowed by more than period. */
|
2011-09-23 18:29:55 -06:00
|
|
|
left = period;
|
|
|
|
local64_set(&hwc->period_left, left);
|
|
|
|
hwc->last_period = period;
|
|
|
|
ret = 1;
|
2011-09-23 18:29:55 -06:00
|
|
|
} else if (unlikely((left + period) <= period)) {
|
|
|
|
/* left underflowed by less than period. */
|
2011-09-23 18:29:55 -06:00
|
|
|
left += period;
|
|
|
|
local64_set(&hwc->period_left, left);
|
|
|
|
hwc->last_period = period;
|
|
|
|
ret = 1;
|
|
|
|
}
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
if (left > mipspmu.max_period) {
|
|
|
|
left = mipspmu.max_period;
|
|
|
|
local64_set(&hwc->period_left, left);
|
|
|
|
}
|
2011-09-23 18:29:55 -06:00
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
local64_set(&hwc->prev_count, mipspmu.overflow - left);
|
2011-09-23 18:29:55 -06:00
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
mipspmu.write_counter(idx, mipspmu.overflow - left);
|
2011-09-23 18:29:55 -06:00
|
|
|
|
|
|
|
perf_event_update_userpage(event);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mipspmu_event_update(struct perf_event *event,
|
|
|
|
struct hw_perf_event *hwc,
|
|
|
|
int idx)
|
|
|
|
{
|
2011-09-23 18:29:55 -06:00
|
|
|
u64 prev_raw_count, new_raw_count;
|
2011-09-23 18:29:55 -06:00
|
|
|
u64 delta;
|
|
|
|
|
|
|
|
again:
|
|
|
|
prev_raw_count = local64_read(&hwc->prev_count);
|
2011-09-23 18:29:55 -06:00
|
|
|
new_raw_count = mipspmu.read_counter(idx);
|
2011-09-23 18:29:55 -06:00
|
|
|
|
|
|
|
if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
|
|
|
|
new_raw_count) != prev_raw_count)
|
|
|
|
goto again;
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
delta = new_raw_count - prev_raw_count;
|
2011-09-23 18:29:55 -06:00
|
|
|
|
|
|
|
local64_add(delta, &event->count);
|
|
|
|
local64_sub(delta, &hwc->period_left);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mipspmu_start(struct perf_event *event, int flags)
|
|
|
|
{
|
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
|
|
|
|
if (flags & PERF_EF_RELOAD)
|
|
|
|
WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
|
|
|
|
|
|
|
|
hwc->state = 0;
|
|
|
|
|
|
|
|
/* Set the period for the event. */
|
|
|
|
mipspmu_event_set_period(event, hwc, hwc->idx);
|
|
|
|
|
|
|
|
/* Enable the event. */
|
2011-09-23 18:29:55 -06:00
|
|
|
mipsxx_pmu_enable_event(hwc, hwc->idx);
|
2011-09-23 18:29:55 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static void mipspmu_stop(struct perf_event *event, int flags)
|
|
|
|
{
|
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
|
|
|
|
if (!(hwc->state & PERF_HES_STOPPED)) {
|
|
|
|
/* We are working on a local event. */
|
2011-09-23 18:29:55 -06:00
|
|
|
mipsxx_pmu_disable_event(hwc->idx);
|
2011-09-23 18:29:55 -06:00
|
|
|
barrier();
|
|
|
|
mipspmu_event_update(event, hwc, hwc->idx);
|
|
|
|
hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int mipspmu_add(struct perf_event *event, int flags)
|
|
|
|
{
|
|
|
|
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
int idx;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
perf_pmu_disable(event->pmu);
|
|
|
|
|
|
|
|
/* To look for a free counter for this event. */
|
2011-09-23 18:29:55 -06:00
|
|
|
idx = mipsxx_pmu_alloc_counter(cpuc, hwc);
|
2011-09-23 18:29:55 -06:00
|
|
|
if (idx < 0) {
|
|
|
|
err = idx;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If there is an event in the counter we are going to use then
|
|
|
|
* make sure it is disabled.
|
|
|
|
*/
|
|
|
|
event->hw.idx = idx;
|
2011-09-23 18:29:55 -06:00
|
|
|
mipsxx_pmu_disable_event(idx);
|
2011-09-23 18:29:55 -06:00
|
|
|
cpuc->events[idx] = event;
|
|
|
|
|
|
|
|
hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
|
|
|
|
if (flags & PERF_EF_START)
|
|
|
|
mipspmu_start(event, PERF_EF_RELOAD);
|
|
|
|
|
|
|
|
/* Propagate our changes to the userspace mapping. */
|
|
|
|
perf_event_update_userpage(event);
|
|
|
|
|
|
|
|
out:
|
|
|
|
perf_pmu_enable(event->pmu);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mipspmu_del(struct perf_event *event, int flags)
|
|
|
|
{
|
|
|
|
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
int idx = hwc->idx;
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
|
2011-09-23 18:29:55 -06:00
|
|
|
|
|
|
|
mipspmu_stop(event, PERF_EF_UPDATE);
|
|
|
|
cpuc->events[idx] = NULL;
|
|
|
|
clear_bit(idx, cpuc->used_mask);
|
|
|
|
|
|
|
|
perf_event_update_userpage(event);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mipspmu_read(struct perf_event *event)
|
|
|
|
{
|
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
|
|
|
|
/* Don't read disabled counters! */
|
|
|
|
if (hwc->idx < 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
mipspmu_event_update(event, hwc, hwc->idx);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mipspmu_enable(struct pmu *pmu)
|
|
|
|
{
|
2011-09-23 18:29:55 -06:00
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
write_unlock(&pmuint_rwlock);
|
|
|
|
#endif
|
|
|
|
resume_local_counters();
|
2011-09-23 18:29:55 -06:00
|
|
|
}
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
/*
|
|
|
|
* MIPS performance counters can be per-TC. The control registers can
|
|
|
|
* not be directly accessed accross CPUs. Hence if we want to do global
|
|
|
|
* control, we need cross CPU calls. on_each_cpu() can help us, but we
|
|
|
|
* can not make sure this function is called with interrupts enabled. So
|
|
|
|
* here we pause local counters and then grab a rwlock and leave the
|
|
|
|
* counters on other CPUs alone. If any counter interrupt raises while
|
|
|
|
* we own the write lock, simply pause local counters on that CPU and
|
|
|
|
* spin in the handler. Also we know we won't be switched to another
|
|
|
|
* CPU after pausing local counters and before grabbing the lock.
|
|
|
|
*/
|
2011-09-23 18:29:55 -06:00
|
|
|
static void mipspmu_disable(struct pmu *pmu)
|
|
|
|
{
|
2011-09-23 18:29:55 -06:00
|
|
|
pause_local_counters();
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
write_lock(&pmuint_rwlock);
|
|
|
|
#endif
|
2011-09-23 18:29:55 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static atomic_t active_events = ATOMIC_INIT(0);
|
|
|
|
static DEFINE_MUTEX(pmu_reserve_mutex);
|
|
|
|
static int (*save_perf_irq)(void);
|
|
|
|
|
|
|
|
static int mipspmu_get_irq(void)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
if (mipspmu.irq >= 0) {
|
2011-09-23 18:29:55 -06:00
|
|
|
/* Request my own irq handler. */
|
2011-09-23 18:29:55 -06:00
|
|
|
err = request_irq(mipspmu.irq, mipsxx_pmu_handle_irq,
|
|
|
|
IRQF_PERCPU | IRQF_NOBALANCING,
|
2011-09-23 18:29:55 -06:00
|
|
|
"mips_perf_pmu", NULL);
|
|
|
|
if (err) {
|
|
|
|
pr_warning("Unable to request IRQ%d for MIPS "
|
2011-09-23 18:29:55 -06:00
|
|
|
"performance counters!\n", mipspmu.irq);
|
2011-09-23 18:29:55 -06:00
|
|
|
}
|
|
|
|
} else if (cp0_perfcount_irq < 0) {
|
|
|
|
/*
|
|
|
|
* We are sharing the irq number with the timer interrupt.
|
|
|
|
*/
|
|
|
|
save_perf_irq = perf_irq;
|
2011-09-23 18:29:55 -06:00
|
|
|
perf_irq = mipsxx_pmu_handle_shared_irq;
|
2011-09-23 18:29:55 -06:00
|
|
|
err = 0;
|
|
|
|
} else {
|
|
|
|
pr_warning("The platform hasn't properly defined its "
|
|
|
|
"interrupt controller.\n");
|
|
|
|
err = -ENOENT;
|
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mipspmu_free_irq(void)
|
|
|
|
{
|
2011-09-23 18:29:55 -06:00
|
|
|
if (mipspmu.irq >= 0)
|
|
|
|
free_irq(mipspmu.irq, NULL);
|
2011-09-23 18:29:55 -06:00
|
|
|
else if (cp0_perfcount_irq < 0)
|
|
|
|
perf_irq = save_perf_irq;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* mipsxx/rm9000/loongson2 have different performance counters, they have
|
|
|
|
* specific low-level init routines.
|
|
|
|
*/
|
|
|
|
static void reset_counters(void *arg);
|
|
|
|
static int __hw_perf_event_init(struct perf_event *event);
|
|
|
|
|
|
|
|
static void hw_perf_event_destroy(struct perf_event *event)
|
|
|
|
{
|
|
|
|
if (atomic_dec_and_mutex_lock(&active_events,
|
|
|
|
&pmu_reserve_mutex)) {
|
|
|
|
/*
|
|
|
|
* We must not call the destroy function with interrupts
|
|
|
|
* disabled.
|
|
|
|
*/
|
|
|
|
on_each_cpu(reset_counters,
|
2011-09-23 18:29:55 -06:00
|
|
|
(void *)(long)mipspmu.num_counters, 1);
|
2011-09-23 18:29:55 -06:00
|
|
|
mipspmu_free_irq();
|
|
|
|
mutex_unlock(&pmu_reserve_mutex);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int mipspmu_event_init(struct perf_event *event)
|
|
|
|
{
|
|
|
|
int err = 0;
|
|
|
|
|
2012-02-09 15:20:59 -07:00
|
|
|
/* does not support taken branch sampling */
|
|
|
|
if (has_branch_stack(event))
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
switch (event->attr.type) {
|
|
|
|
case PERF_TYPE_RAW:
|
|
|
|
case PERF_TYPE_HARDWARE:
|
|
|
|
case PERF_TYPE_HW_CACHE:
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return -ENOENT;
|
|
|
|
}
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
if (event->cpu >= nr_cpumask_bits ||
|
|
|
|
(event->cpu >= 0 && !cpu_online(event->cpu)))
|
2011-09-23 18:29:55 -06:00
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
if (!atomic_inc_not_zero(&active_events)) {
|
|
|
|
mutex_lock(&pmu_reserve_mutex);
|
|
|
|
if (atomic_read(&active_events) == 0)
|
|
|
|
err = mipspmu_get_irq();
|
|
|
|
|
|
|
|
if (!err)
|
|
|
|
atomic_inc(&active_events);
|
|
|
|
mutex_unlock(&pmu_reserve_mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2011-11-21 12:28:48 -07:00
|
|
|
return __hw_perf_event_init(event);
|
2011-09-23 18:29:55 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct pmu pmu = {
|
|
|
|
.pmu_enable = mipspmu_enable,
|
|
|
|
.pmu_disable = mipspmu_disable,
|
|
|
|
.event_init = mipspmu_event_init,
|
|
|
|
.add = mipspmu_add,
|
|
|
|
.del = mipspmu_del,
|
|
|
|
.start = mipspmu_start,
|
|
|
|
.stop = mipspmu_stop,
|
|
|
|
.read = mipspmu_read,
|
|
|
|
};
|
|
|
|
|
|
|
|
static unsigned int mipspmu_perf_event_encode(const struct mips_perf_event *pev)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Top 8 bits for range, next 16 bits for cntr_mask, lowest 8 bits for
|
|
|
|
* event_id.
|
|
|
|
*/
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
return ((unsigned int)pev->range << 24) |
|
|
|
|
(pev->cntr_mask & 0xffff00) |
|
|
|
|
(pev->event_id & 0xff);
|
|
|
|
#else
|
|
|
|
return (pev->cntr_mask & 0xffff00) |
|
|
|
|
(pev->event_id & 0xff);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct mips_perf_event *mipspmu_map_general_event(int idx)
|
|
|
|
{
|
|
|
|
|
2012-07-13 14:44:50 -06:00
|
|
|
if ((*mipspmu.general_event_map)[idx].cntr_mask == 0)
|
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
return &(*mipspmu.general_event_map)[idx];
|
2011-09-23 18:29:55 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static const struct mips_perf_event *mipspmu_map_cache_event(u64 config)
|
|
|
|
{
|
|
|
|
unsigned int cache_type, cache_op, cache_result;
|
|
|
|
const struct mips_perf_event *pev;
|
|
|
|
|
|
|
|
cache_type = (config >> 0) & 0xff;
|
|
|
|
if (cache_type >= PERF_COUNT_HW_CACHE_MAX)
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
cache_op = (config >> 8) & 0xff;
|
|
|
|
if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX)
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
cache_result = (config >> 16) & 0xff;
|
|
|
|
if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
pev = &((*mipspmu.cache_event_map)
|
2011-09-23 18:29:55 -06:00
|
|
|
[cache_type]
|
|
|
|
[cache_op]
|
|
|
|
[cache_result]);
|
|
|
|
|
2012-07-13 14:44:50 -06:00
|
|
|
if (pev->cntr_mask == 0)
|
2011-09-23 18:29:55 -06:00
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
|
|
|
|
return pev;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static int validate_group(struct perf_event *event)
|
|
|
|
{
|
|
|
|
struct perf_event *sibling, *leader = event->group_leader;
|
|
|
|
struct cpu_hw_events fake_cpuc;
|
|
|
|
|
|
|
|
memset(&fake_cpuc, 0, sizeof(fake_cpuc));
|
|
|
|
|
2011-11-21 12:28:47 -07:00
|
|
|
if (mipsxx_pmu_alloc_counter(&fake_cpuc, &leader->hw) < 0)
|
2011-11-09 09:56:37 -07:00
|
|
|
return -EINVAL;
|
2011-09-23 18:29:55 -06:00
|
|
|
|
|
|
|
list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
|
2011-11-21 12:28:47 -07:00
|
|
|
if (mipsxx_pmu_alloc_counter(&fake_cpuc, &sibling->hw) < 0)
|
2011-11-09 09:56:37 -07:00
|
|
|
return -EINVAL;
|
2011-09-23 18:29:55 -06:00
|
|
|
}
|
|
|
|
|
2011-11-21 12:28:47 -07:00
|
|
|
if (mipsxx_pmu_alloc_counter(&fake_cpuc, &event->hw) < 0)
|
2011-11-09 09:56:37 -07:00
|
|
|
return -EINVAL;
|
2011-09-23 18:29:55 -06:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This is needed by specific irq handlers in perf_event_*.c */
|
|
|
|
static void handle_associated_event(struct cpu_hw_events *cpuc,
|
|
|
|
int idx, struct perf_sample_data *data,
|
|
|
|
struct pt_regs *regs)
|
|
|
|
{
|
|
|
|
struct perf_event *event = cpuc->events[idx];
|
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
|
|
|
|
mipspmu_event_update(event, hwc, idx);
|
|
|
|
data->period = event->hw.last_period;
|
|
|
|
if (!mipspmu_event_set_period(event, hwc, idx))
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (perf_event_overflow(event, data, regs))
|
2011-09-23 18:29:55 -06:00
|
|
|
mipsxx_pmu_disable_event(idx);
|
2011-09-23 18:29:55 -06:00
|
|
|
}
|
2010-10-12 05:37:24 -06:00
|
|
|
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
static int __n_counters(void)
|
2010-10-12 05:37:24 -06:00
|
|
|
{
|
|
|
|
if (!(read_c0_config1() & M_CONFIG1_PC))
|
|
|
|
return 0;
|
|
|
|
if (!(read_c0_perfctrl0() & M_PERFCTL_MORE))
|
|
|
|
return 1;
|
|
|
|
if (!(read_c0_perfctrl1() & M_PERFCTL_MORE))
|
|
|
|
return 2;
|
|
|
|
if (!(read_c0_perfctrl2() & M_PERFCTL_MORE))
|
|
|
|
return 3;
|
|
|
|
|
|
|
|
return 4;
|
|
|
|
}
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
static int n_counters(void)
|
2010-10-12 05:37:24 -06:00
|
|
|
{
|
|
|
|
int counters;
|
|
|
|
|
|
|
|
switch (current_cpu_type()) {
|
|
|
|
case CPU_R10000:
|
|
|
|
counters = 2;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case CPU_R12000:
|
|
|
|
case CPU_R14000:
|
|
|
|
counters = 4;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
counters = __n_counters();
|
|
|
|
}
|
|
|
|
|
|
|
|
return counters;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void reset_counters(void *arg)
|
|
|
|
{
|
|
|
|
int counters = (int)(long)arg;
|
|
|
|
switch (counters) {
|
|
|
|
case 4:
|
2011-09-23 18:29:55 -06:00
|
|
|
mipsxx_pmu_write_control(3, 0);
|
|
|
|
mipspmu.write_counter(3, 0);
|
2010-10-12 05:37:24 -06:00
|
|
|
case 3:
|
2011-09-23 18:29:55 -06:00
|
|
|
mipsxx_pmu_write_control(2, 0);
|
|
|
|
mipspmu.write_counter(2, 0);
|
2010-10-12 05:37:24 -06:00
|
|
|
case 2:
|
2011-09-23 18:29:55 -06:00
|
|
|
mipsxx_pmu_write_control(1, 0);
|
|
|
|
mipspmu.write_counter(1, 0);
|
2010-10-12 05:37:24 -06:00
|
|
|
case 1:
|
2011-09-23 18:29:55 -06:00
|
|
|
mipsxx_pmu_write_control(0, 0);
|
|
|
|
mipspmu.write_counter(0, 0);
|
2010-10-12 05:37:24 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 24K/34K/1004K cores can share the same event map. */
|
|
|
|
static const struct mips_perf_event mipsxxcore_event_map
|
|
|
|
[PERF_COUNT_HW_MAX] = {
|
|
|
|
[PERF_COUNT_HW_CPU_CYCLES] = { 0x00, CNTR_EVEN | CNTR_ODD, P },
|
|
|
|
[PERF_COUNT_HW_INSTRUCTIONS] = { 0x01, CNTR_EVEN | CNTR_ODD, T },
|
|
|
|
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 0x02, CNTR_EVEN, T },
|
|
|
|
[PERF_COUNT_HW_BRANCH_MISSES] = { 0x02, CNTR_ODD, T },
|
|
|
|
};
|
|
|
|
|
|
|
|
/* 74K core has different branch event code. */
|
|
|
|
static const struct mips_perf_event mipsxx74Kcore_event_map
|
|
|
|
[PERF_COUNT_HW_MAX] = {
|
|
|
|
[PERF_COUNT_HW_CPU_CYCLES] = { 0x00, CNTR_EVEN | CNTR_ODD, P },
|
|
|
|
[PERF_COUNT_HW_INSTRUCTIONS] = { 0x01, CNTR_EVEN | CNTR_ODD, T },
|
|
|
|
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 0x27, CNTR_EVEN, T },
|
|
|
|
[PERF_COUNT_HW_BRANCH_MISSES] = { 0x27, CNTR_ODD, T },
|
|
|
|
};
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
static const struct mips_perf_event octeon_event_map[PERF_COUNT_HW_MAX] = {
|
|
|
|
[PERF_COUNT_HW_CPU_CYCLES] = { 0x01, CNTR_ALL },
|
|
|
|
[PERF_COUNT_HW_INSTRUCTIONS] = { 0x03, CNTR_ALL },
|
|
|
|
[PERF_COUNT_HW_CACHE_REFERENCES] = { 0x2b, CNTR_ALL },
|
|
|
|
[PERF_COUNT_HW_CACHE_MISSES] = { 0x2e, CNTR_ALL },
|
|
|
|
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 0x08, CNTR_ALL },
|
|
|
|
[PERF_COUNT_HW_BRANCH_MISSES] = { 0x09, CNTR_ALL },
|
|
|
|
[PERF_COUNT_HW_BUS_CYCLES] = { 0x25, CNTR_ALL },
|
|
|
|
};
|
|
|
|
|
2010-10-12 05:37:24 -06:00
|
|
|
/* 24K/34K/1004K cores can share the same cache event map. */
|
|
|
|
static const struct mips_perf_event mipsxxcore_cache_map
|
|
|
|
[PERF_COUNT_HW_CACHE_MAX]
|
|
|
|
[PERF_COUNT_HW_CACHE_OP_MAX]
|
|
|
|
[PERF_COUNT_HW_CACHE_RESULT_MAX] = {
|
|
|
|
[C(L1D)] = {
|
|
|
|
/*
|
|
|
|
* Like some other architectures (e.g. ARM), the performance
|
|
|
|
* counters don't differentiate between read and write
|
|
|
|
* accesses/misses, so this isn't strictly correct, but it's the
|
|
|
|
* best we can do. Writes and reads get combined.
|
|
|
|
*/
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x0a, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x0b, CNTR_EVEN | CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x0a, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x0b, CNTR_EVEN | CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(L1I)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x09, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x09, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x09, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x09, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_PREFETCH)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x14, CNTR_EVEN, T },
|
|
|
|
/*
|
|
|
|
* Note that MIPS has only "hit" events countable for
|
|
|
|
* the prefetch operation.
|
|
|
|
*/
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(LL)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x15, CNTR_ODD, P },
|
|
|
|
[C(RESULT_MISS)] = { 0x16, CNTR_EVEN, P },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x15, CNTR_ODD, P },
|
|
|
|
[C(RESULT_MISS)] = { 0x16, CNTR_EVEN, P },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(DTLB)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x06, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x06, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x06, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x06, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(ITLB)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x05, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x05, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x05, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x05, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(BPU)] = {
|
|
|
|
/* Using the same code for *HW_BRANCH* */
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x02, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x02, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x02, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x02, CNTR_ODD, T },
|
|
|
|
},
|
2011-04-22 15:37:06 -06:00
|
|
|
},
|
2010-10-12 05:37:24 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
/* 74K core has completely different cache event map. */
|
|
|
|
static const struct mips_perf_event mipsxx74Kcore_cache_map
|
|
|
|
[PERF_COUNT_HW_CACHE_MAX]
|
|
|
|
[PERF_COUNT_HW_CACHE_OP_MAX]
|
|
|
|
[PERF_COUNT_HW_CACHE_RESULT_MAX] = {
|
|
|
|
[C(L1D)] = {
|
|
|
|
/*
|
|
|
|
* Like some other architectures (e.g. ARM), the performance
|
|
|
|
* counters don't differentiate between read and write
|
|
|
|
* accesses/misses, so this isn't strictly correct, but it's the
|
|
|
|
* best we can do. Writes and reads get combined.
|
|
|
|
*/
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x17, CNTR_ODD, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x18, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x17, CNTR_ODD, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x18, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(L1I)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x06, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x06, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x06, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x06, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_PREFETCH)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x34, CNTR_EVEN, T },
|
|
|
|
/*
|
|
|
|
* Note that MIPS has only "hit" events countable for
|
|
|
|
* the prefetch operation.
|
|
|
|
*/
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(LL)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x1c, CNTR_ODD, P },
|
|
|
|
[C(RESULT_MISS)] = { 0x1d, CNTR_EVEN | CNTR_ODD, P },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x1c, CNTR_ODD, P },
|
|
|
|
[C(RESULT_MISS)] = { 0x1d, CNTR_EVEN | CNTR_ODD, P },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(ITLB)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x04, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x04, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x04, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x04, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(BPU)] = {
|
|
|
|
/* Using the same code for *HW_BRANCH* */
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x27, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x27, CNTR_ODD, T },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x27, CNTR_EVEN, T },
|
|
|
|
[C(RESULT_MISS)] = { 0x27, CNTR_ODD, T },
|
|
|
|
},
|
2011-04-22 15:37:06 -06:00
|
|
|
},
|
2010-10-12 05:37:24 -06:00
|
|
|
};
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
|
|
|
|
static const struct mips_perf_event octeon_cache_map
|
|
|
|
[PERF_COUNT_HW_CACHE_MAX]
|
|
|
|
[PERF_COUNT_HW_CACHE_OP_MAX]
|
|
|
|
[PERF_COUNT_HW_CACHE_RESULT_MAX] = {
|
|
|
|
[C(L1D)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x2b, CNTR_ALL },
|
|
|
|
[C(RESULT_MISS)] = { 0x2e, CNTR_ALL },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x30, CNTR_ALL },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(L1I)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x18, CNTR_ALL },
|
|
|
|
},
|
|
|
|
[C(OP_PREFETCH)] = {
|
|
|
|
[C(RESULT_ACCESS)] = { 0x19, CNTR_ALL },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(DTLB)] = {
|
|
|
|
/*
|
|
|
|
* Only general DTLB misses are counted use the same event for
|
|
|
|
* read and write.
|
|
|
|
*/
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_MISS)] = { 0x35, CNTR_ALL },
|
|
|
|
},
|
|
|
|
[C(OP_WRITE)] = {
|
|
|
|
[C(RESULT_MISS)] = { 0x35, CNTR_ALL },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
[C(ITLB)] = {
|
|
|
|
[C(OP_READ)] = {
|
|
|
|
[C(RESULT_MISS)] = { 0x37, CNTR_ALL },
|
|
|
|
},
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2010-10-12 05:37:24 -06:00
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
2011-09-23 18:29:55 -06:00
|
|
|
static void check_and_calc_range(struct perf_event *event,
|
|
|
|
const struct mips_perf_event *pev)
|
2010-10-12 05:37:24 -06:00
|
|
|
{
|
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
|
|
|
|
if (event->cpu >= 0) {
|
|
|
|
if (pev->range > V) {
|
|
|
|
/*
|
|
|
|
* The user selected an event that is processor
|
|
|
|
* wide, while expecting it to be VPE wide.
|
|
|
|
*/
|
|
|
|
hwc->config_base |= M_TC_EN_ALL;
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* FIXME: cpu_data[event->cpu].vpe_id reports 0
|
|
|
|
* for both CPUs.
|
|
|
|
*/
|
|
|
|
hwc->config_base |= M_PERFCTL_VPEID(event->cpu);
|
|
|
|
hwc->config_base |= M_TC_EN_VPE;
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
hwc->config_base |= M_TC_EN_ALL;
|
|
|
|
}
|
|
|
|
#else
|
2011-09-23 18:29:55 -06:00
|
|
|
static void check_and_calc_range(struct perf_event *event,
|
|
|
|
const struct mips_perf_event *pev)
|
2010-10-12 05:37:24 -06:00
|
|
|
{
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static int __hw_perf_event_init(struct perf_event *event)
|
|
|
|
{
|
|
|
|
struct perf_event_attr *attr = &event->attr;
|
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
const struct mips_perf_event *pev;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
/* Returning MIPS event descriptor for generic perf event. */
|
|
|
|
if (PERF_TYPE_HARDWARE == event->attr.type) {
|
|
|
|
if (event->attr.config >= PERF_COUNT_HW_MAX)
|
|
|
|
return -EINVAL;
|
|
|
|
pev = mipspmu_map_general_event(event->attr.config);
|
|
|
|
} else if (PERF_TYPE_HW_CACHE == event->attr.type) {
|
|
|
|
pev = mipspmu_map_cache_event(event->attr.config);
|
|
|
|
} else if (PERF_TYPE_RAW == event->attr.type) {
|
|
|
|
/* We are working on the global raw event. */
|
|
|
|
mutex_lock(&raw_event_mutex);
|
2011-09-23 18:29:55 -06:00
|
|
|
pev = mipspmu.map_raw_event(event->attr.config);
|
2010-10-12 05:37:24 -06:00
|
|
|
} else {
|
|
|
|
/* The event type is not (yet) supported. */
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (IS_ERR(pev)) {
|
|
|
|
if (PERF_TYPE_RAW == event->attr.type)
|
|
|
|
mutex_unlock(&raw_event_mutex);
|
|
|
|
return PTR_ERR(pev);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We allow max flexibility on how each individual counter shared
|
|
|
|
* by the single CPU operates (the mode exclusion and the range).
|
|
|
|
*/
|
|
|
|
hwc->config_base = M_PERFCTL_INTERRUPT_ENABLE;
|
|
|
|
|
|
|
|
/* Calculate range bits and validate it. */
|
|
|
|
if (num_possible_cpus() > 1)
|
|
|
|
check_and_calc_range(event, pev);
|
|
|
|
|
|
|
|
hwc->event_base = mipspmu_perf_event_encode(pev);
|
|
|
|
if (PERF_TYPE_RAW == event->attr.type)
|
|
|
|
mutex_unlock(&raw_event_mutex);
|
|
|
|
|
|
|
|
if (!attr->exclude_user)
|
|
|
|
hwc->config_base |= M_PERFCTL_USER;
|
|
|
|
if (!attr->exclude_kernel) {
|
|
|
|
hwc->config_base |= M_PERFCTL_KERNEL;
|
|
|
|
/* MIPS kernel mode: KSU == 00b || EXL == 1 || ERL == 1 */
|
|
|
|
hwc->config_base |= M_PERFCTL_EXL;
|
|
|
|
}
|
|
|
|
if (!attr->exclude_hv)
|
|
|
|
hwc->config_base |= M_PERFCTL_SUPERVISOR;
|
|
|
|
|
|
|
|
hwc->config_base &= M_PERFCTL_CONFIG_MASK;
|
|
|
|
/*
|
|
|
|
* The event can belong to another cpu. We do not assign a local
|
|
|
|
* counter for it for now.
|
|
|
|
*/
|
|
|
|
hwc->idx = -1;
|
|
|
|
hwc->config = 0;
|
|
|
|
|
|
|
|
if (!hwc->sample_period) {
|
2011-09-23 18:29:55 -06:00
|
|
|
hwc->sample_period = mipspmu.max_period;
|
2010-10-12 05:37:24 -06:00
|
|
|
hwc->last_period = hwc->sample_period;
|
|
|
|
local64_set(&hwc->period_left, hwc->sample_period);
|
|
|
|
}
|
|
|
|
|
|
|
|
err = 0;
|
2011-11-21 12:28:48 -07:00
|
|
|
if (event->group_leader != event)
|
2010-10-12 05:37:24 -06:00
|
|
|
err = validate_group(event);
|
|
|
|
|
|
|
|
event->destroy = hw_perf_event_destroy;
|
2011-11-21 12:28:48 -07:00
|
|
|
|
|
|
|
if (err)
|
|
|
|
event->destroy(event);
|
|
|
|
|
2010-10-12 05:37:24 -06:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void pause_local_counters(void)
|
|
|
|
{
|
|
|
|
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
2011-09-23 18:29:55 -06:00
|
|
|
int ctr = mipspmu.num_counters;
|
2010-10-12 05:37:24 -06:00
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
2011-09-23 18:29:55 -06:00
|
|
|
do {
|
|
|
|
ctr--;
|
|
|
|
cpuc->saved_ctrl[ctr] = mipsxx_pmu_read_control(ctr);
|
|
|
|
mipsxx_pmu_write_control(ctr, cpuc->saved_ctrl[ctr] &
|
|
|
|
~M_PERFCTL_COUNT_EVENT_WHENEVER);
|
|
|
|
} while (ctr > 0);
|
2010-10-12 05:37:24 -06:00
|
|
|
local_irq_restore(flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void resume_local_counters(void)
|
|
|
|
{
|
|
|
|
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
2011-09-23 18:29:55 -06:00
|
|
|
int ctr = mipspmu.num_counters;
|
2010-10-12 05:37:24 -06:00
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
do {
|
|
|
|
ctr--;
|
|
|
|
mipsxx_pmu_write_control(ctr, cpuc->saved_ctrl[ctr]);
|
|
|
|
} while (ctr > 0);
|
2010-10-12 05:37:24 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int mipsxx_pmu_handle_shared_irq(void)
|
|
|
|
{
|
|
|
|
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
|
struct perf_sample_data data;
|
2011-09-23 18:29:55 -06:00
|
|
|
unsigned int counters = mipspmu.num_counters;
|
|
|
|
u64 counter;
|
2010-10-12 05:37:24 -06:00
|
|
|
int handled = IRQ_NONE;
|
|
|
|
struct pt_regs *regs;
|
|
|
|
|
|
|
|
if (cpu_has_mips_r2 && !(read_c0_cause() & (1 << 26)))
|
|
|
|
return handled;
|
|
|
|
/*
|
|
|
|
* First we pause the local counters, so that when we are locked
|
|
|
|
* here, the counters are all paused. When it gets locked due to
|
|
|
|
* perf_disable(), the timer interrupt handler will be delayed.
|
|
|
|
*
|
|
|
|
* See also mipsxx_pmu_start().
|
|
|
|
*/
|
|
|
|
pause_local_counters();
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
read_lock(&pmuint_rwlock);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
regs = get_irq_regs();
|
|
|
|
|
2012-04-02 12:19:08 -06:00
|
|
|
perf_sample_data_init(&data, 0, 0);
|
2010-10-12 05:37:24 -06:00
|
|
|
|
|
|
|
switch (counters) {
|
|
|
|
#define HANDLE_COUNTER(n) \
|
|
|
|
case n + 1: \
|
|
|
|
if (test_bit(n, cpuc->used_mask)) { \
|
2011-09-23 18:29:55 -06:00
|
|
|
counter = mipspmu.read_counter(n); \
|
|
|
|
if (counter & mipspmu.overflow) { \
|
|
|
|
handle_associated_event(cpuc, n, &data, regs); \
|
2010-10-12 05:37:24 -06:00
|
|
|
handled = IRQ_HANDLED; \
|
|
|
|
} \
|
|
|
|
}
|
|
|
|
HANDLE_COUNTER(3)
|
|
|
|
HANDLE_COUNTER(2)
|
|
|
|
HANDLE_COUNTER(1)
|
|
|
|
HANDLE_COUNTER(0)
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Do all the work for the pending perf events. We can do this
|
|
|
|
* in here because the performance counter interrupt is a regular
|
|
|
|
* interrupt, not NMI.
|
|
|
|
*/
|
|
|
|
if (handled == IRQ_HANDLED)
|
2011-01-21 01:19:17 -07:00
|
|
|
irq_work_run();
|
2010-10-12 05:37:24 -06:00
|
|
|
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
read_unlock(&pmuint_rwlock);
|
|
|
|
#endif
|
|
|
|
resume_local_counters();
|
|
|
|
return handled;
|
|
|
|
}
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
static irqreturn_t mipsxx_pmu_handle_irq(int irq, void *dev)
|
2010-10-12 05:37:24 -06:00
|
|
|
{
|
|
|
|
return mipsxx_pmu_handle_shared_irq();
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 24K */
|
|
|
|
#define IS_BOTH_COUNTERS_24K_EVENT(b) \
|
|
|
|
((b) == 0 || (b) == 1 || (b) == 11)
|
|
|
|
|
|
|
|
/* 34K */
|
|
|
|
#define IS_BOTH_COUNTERS_34K_EVENT(b) \
|
|
|
|
((b) == 0 || (b) == 1 || (b) == 11)
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
#define IS_RANGE_P_34K_EVENT(r, b) \
|
|
|
|
((b) == 0 || (r) == 18 || (b) == 21 || (b) == 22 || \
|
|
|
|
(b) == 25 || (b) == 39 || (r) == 44 || (r) == 174 || \
|
|
|
|
(r) == 176 || ((b) >= 50 && (b) <= 55) || \
|
|
|
|
((b) >= 64 && (b) <= 67))
|
|
|
|
#define IS_RANGE_V_34K_EVENT(r) ((r) == 47)
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* 74K */
|
|
|
|
#define IS_BOTH_COUNTERS_74K_EVENT(b) \
|
|
|
|
((b) == 0 || (b) == 1)
|
|
|
|
|
|
|
|
/* 1004K */
|
|
|
|
#define IS_BOTH_COUNTERS_1004K_EVENT(b) \
|
|
|
|
((b) == 0 || (b) == 1 || (b) == 11)
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
#define IS_RANGE_P_1004K_EVENT(r, b) \
|
|
|
|
((b) == 0 || (r) == 18 || (b) == 21 || (b) == 22 || \
|
|
|
|
(b) == 25 || (b) == 36 || (b) == 39 || (r) == 44 || \
|
|
|
|
(r) == 174 || (r) == 176 || ((b) >= 50 && (b) <= 59) || \
|
|
|
|
(r) == 188 || (b) == 61 || (b) == 62 || \
|
|
|
|
((b) >= 64 && (b) <= 67))
|
|
|
|
#define IS_RANGE_V_1004K_EVENT(r) ((r) == 47)
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
|
|
* User can use 0-255 raw events, where 0-127 for the events of even
|
|
|
|
* counters, and 128-255 for odd counters. Note that bit 7 is used to
|
|
|
|
* indicate the parity. So, for example, when user wants to take the
|
|
|
|
* Event Num of 15 for odd counters (by referring to the user manual),
|
|
|
|
* then 128 needs to be added to 15 as the input for the event config,
|
|
|
|
* i.e., 143 (0x8F) to be used.
|
|
|
|
*/
|
2011-09-23 18:29:55 -06:00
|
|
|
static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
|
2010-10-12 05:37:24 -06:00
|
|
|
{
|
|
|
|
unsigned int raw_id = config & 0xff;
|
|
|
|
unsigned int base_id = raw_id & 0x7f;
|
|
|
|
|
2011-11-21 12:28:45 -07:00
|
|
|
raw_event.event_id = base_id;
|
|
|
|
|
2010-10-12 05:37:24 -06:00
|
|
|
switch (current_cpu_type()) {
|
|
|
|
case CPU_24K:
|
|
|
|
if (IS_BOTH_COUNTERS_24K_EVENT(base_id))
|
|
|
|
raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
|
|
|
|
else
|
|
|
|
raw_event.cntr_mask =
|
|
|
|
raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
/*
|
|
|
|
* This is actually doing nothing. Non-multithreading
|
|
|
|
* CPUs will not check and calculate the range.
|
|
|
|
*/
|
|
|
|
raw_event.range = P;
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
case CPU_34K:
|
|
|
|
if (IS_BOTH_COUNTERS_34K_EVENT(base_id))
|
|
|
|
raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
|
|
|
|
else
|
|
|
|
raw_event.cntr_mask =
|
|
|
|
raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
if (IS_RANGE_P_34K_EVENT(raw_id, base_id))
|
|
|
|
raw_event.range = P;
|
|
|
|
else if (unlikely(IS_RANGE_V_34K_EVENT(raw_id)))
|
|
|
|
raw_event.range = V;
|
|
|
|
else
|
|
|
|
raw_event.range = T;
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
case CPU_74K:
|
|
|
|
if (IS_BOTH_COUNTERS_74K_EVENT(base_id))
|
|
|
|
raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
|
|
|
|
else
|
|
|
|
raw_event.cntr_mask =
|
|
|
|
raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
raw_event.range = P;
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
case CPU_1004K:
|
|
|
|
if (IS_BOTH_COUNTERS_1004K_EVENT(base_id))
|
|
|
|
raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
|
|
|
|
else
|
|
|
|
raw_event.cntr_mask =
|
|
|
|
raw_id > 127 ? CNTR_ODD : CNTR_EVEN;
|
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
|
if (IS_RANGE_P_1004K_EVENT(raw_id, base_id))
|
|
|
|
raw_event.range = P;
|
|
|
|
else if (unlikely(IS_RANGE_V_1004K_EVENT(raw_id)))
|
|
|
|
raw_event.range = V;
|
|
|
|
else
|
|
|
|
raw_event.range = T;
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return &raw_event;
|
|
|
|
}
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
static const struct mips_perf_event *octeon_pmu_map_raw_event(u64 config)
|
|
|
|
{
|
|
|
|
unsigned int raw_id = config & 0xff;
|
|
|
|
unsigned int base_id = raw_id & 0x7f;
|
|
|
|
|
|
|
|
|
|
|
|
raw_event.cntr_mask = CNTR_ALL;
|
|
|
|
raw_event.event_id = base_id;
|
|
|
|
|
|
|
|
if (current_cpu_type() == CPU_CAVIUM_OCTEON2) {
|
|
|
|
if (base_id > 0x42)
|
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
} else {
|
|
|
|
if (base_id > 0x3a)
|
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (base_id) {
|
|
|
|
case 0x00:
|
|
|
|
case 0x0f:
|
|
|
|
case 0x1e:
|
|
|
|
case 0x1f:
|
|
|
|
case 0x2f:
|
|
|
|
case 0x34:
|
|
|
|
case 0x3b ... 0x3f:
|
|
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return &raw_event;
|
|
|
|
}
|
|
|
|
|
2010-10-12 05:37:24 -06:00
|
|
|
static int __init
|
|
|
|
init_hw_perf_events(void)
|
|
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|
{
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|
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|
int counters, irq;
|
2011-09-23 18:29:55 -06:00
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int counter_bits;
|
2010-10-12 05:37:24 -06:00
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pr_info("Performance counters: ");
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|
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counters = n_counters();
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|
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|
if (counters == 0) {
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pr_cont("No available PMU.\n");
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return -ENODEV;
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}
|
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|
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#ifdef CONFIG_MIPS_MT_SMP
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|
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cpu_has_mipsmt_pertccounters = read_c0_config7() & (1<<19);
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if (!cpu_has_mipsmt_pertccounters)
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counters = counters_total_to_per_cpu(counters);
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|
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#endif
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|
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|
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#ifdef MSC01E_INT_BASE
|
|
|
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if (cpu_has_veic) {
|
|
|
|
/*
|
|
|
|
* Using platform specific interrupt controller defines.
|
|
|
|
*/
|
|
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|
irq = MSC01E_INT_BASE + MSC01E_INT_PERFCTR;
|
|
|
|
} else {
|
|
|
|
#endif
|
2012-05-02 09:33:04 -06:00
|
|
|
if ((cp0_perfcount_irq >= 0) &&
|
|
|
|
(cp0_compare_irq != cp0_perfcount_irq))
|
2010-10-12 05:37:24 -06:00
|
|
|
irq = MIPS_CPU_IRQ_BASE + cp0_perfcount_irq;
|
|
|
|
else
|
|
|
|
irq = -1;
|
|
|
|
#ifdef MSC01E_INT_BASE
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
mipspmu.map_raw_event = mipsxx_pmu_map_raw_event;
|
2010-10-12 05:37:24 -06:00
|
|
|
|
|
|
|
switch (current_cpu_type()) {
|
|
|
|
case CPU_24K:
|
2011-09-23 18:29:55 -06:00
|
|
|
mipspmu.name = "mips/24K";
|
|
|
|
mipspmu.general_event_map = &mipsxxcore_event_map;
|
|
|
|
mipspmu.cache_event_map = &mipsxxcore_cache_map;
|
2010-10-12 05:37:24 -06:00
|
|
|
break;
|
|
|
|
case CPU_34K:
|
2011-09-23 18:29:55 -06:00
|
|
|
mipspmu.name = "mips/34K";
|
|
|
|
mipspmu.general_event_map = &mipsxxcore_event_map;
|
|
|
|
mipspmu.cache_event_map = &mipsxxcore_cache_map;
|
2010-10-12 05:37:24 -06:00
|
|
|
break;
|
|
|
|
case CPU_74K:
|
2011-09-23 18:29:55 -06:00
|
|
|
mipspmu.name = "mips/74K";
|
|
|
|
mipspmu.general_event_map = &mipsxx74Kcore_event_map;
|
|
|
|
mipspmu.cache_event_map = &mipsxx74Kcore_cache_map;
|
2010-10-12 05:37:24 -06:00
|
|
|
break;
|
|
|
|
case CPU_1004K:
|
2011-09-23 18:29:55 -06:00
|
|
|
mipspmu.name = "mips/1004K";
|
|
|
|
mipspmu.general_event_map = &mipsxxcore_event_map;
|
|
|
|
mipspmu.cache_event_map = &mipsxxcore_cache_map;
|
2010-10-12 05:37:24 -06:00
|
|
|
break;
|
2012-06-20 13:05:32 -06:00
|
|
|
case CPU_LOONGSON1:
|
|
|
|
mipspmu.name = "mips/loongson1";
|
|
|
|
mipspmu.general_event_map = &mipsxxcore_event_map;
|
|
|
|
mipspmu.cache_event_map = &mipsxxcore_cache_map;
|
|
|
|
break;
|
2011-09-23 18:29:55 -06:00
|
|
|
case CPU_CAVIUM_OCTEON:
|
|
|
|
case CPU_CAVIUM_OCTEON_PLUS:
|
|
|
|
case CPU_CAVIUM_OCTEON2:
|
|
|
|
mipspmu.name = "octeon";
|
|
|
|
mipspmu.general_event_map = &octeon_event_map;
|
|
|
|
mipspmu.cache_event_map = &octeon_cache_map;
|
|
|
|
mipspmu.map_raw_event = octeon_pmu_map_raw_event;
|
|
|
|
break;
|
2010-10-12 05:37:24 -06:00
|
|
|
default:
|
|
|
|
pr_cont("Either hardware does not support performance "
|
|
|
|
"counters, or not yet implemented.\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2011-09-23 18:29:55 -06:00
|
|
|
mipspmu.num_counters = counters;
|
|
|
|
mipspmu.irq = irq;
|
|
|
|
|
|
|
|
if (read_c0_perfctrl0() & M_PERFCTL_WIDE) {
|
|
|
|
mipspmu.max_period = (1ULL << 63) - 1;
|
|
|
|
mipspmu.valid_count = (1ULL << 63) - 1;
|
|
|
|
mipspmu.overflow = 1ULL << 63;
|
|
|
|
mipspmu.read_counter = mipsxx_pmu_read_counter_64;
|
|
|
|
mipspmu.write_counter = mipsxx_pmu_write_counter_64;
|
|
|
|
counter_bits = 64;
|
|
|
|
} else {
|
|
|
|
mipspmu.max_period = (1ULL << 31) - 1;
|
|
|
|
mipspmu.valid_count = (1ULL << 31) - 1;
|
|
|
|
mipspmu.overflow = 1ULL << 31;
|
|
|
|
mipspmu.read_counter = mipsxx_pmu_read_counter;
|
|
|
|
mipspmu.write_counter = mipsxx_pmu_write_counter;
|
|
|
|
counter_bits = 32;
|
|
|
|
}
|
|
|
|
|
|
|
|
on_each_cpu(reset_counters, (void *)(long)counters, 1);
|
|
|
|
|
|
|
|
pr_cont("%s PMU enabled, %d %d-bit counters available to each "
|
|
|
|
"CPU, irq %d%s\n", mipspmu.name, counters, counter_bits, irq,
|
|
|
|
irq < 0 ? " (share with timer interrupt)" : "");
|
2010-10-12 05:37:24 -06:00
|
|
|
|
MIPS, Perf-events: Work with the new PMU interface
This is the MIPS part of the following commits by Peter Zijlstra:
- a4eaf7f14675cb512d69f0c928055e73d0c6d252
perf: Rework the PMU methods
Replace pmu::{enable,disable,start,stop,unthrottle} with
pmu::{add,del,start,stop}, all of which take a flags argument.
The new interface extends the capability to stop a counter while
keeping it scheduled on the PMU. We replace the throttled state with
the generic stopped state.
This also allows us to efficiently stop/start counters over certain
code paths (like IRQ handlers).
It also allows scheduling a counter without it starting, allowing for
a generic frozen state (useful for rotating stopped counters).
The stopped state is implemented in two different ways, depending on
how the architecture implemented the throttled state:
1) We disable the counter:
a) the pmu has per-counter enable bits, we flip that
b) we program a NOP event, preserving the counter state
2) We store the counter state and ignore all read/overflow events
For MIPSXX, the stopped state is implemented in the way of 1.b as above.
- 33696fc0d141bbbcb12f75b69608ea83282e3117
perf: Per PMU disable
Changes perf_disable() into perf_pmu_disable().
- 24cd7f54a0d47e1d5b3de29e2456bfbd2d8447b7
perf: Reduce perf_disable() usage
Since the current perf_disable() usage is only an optimization,
remove it for now. This eases the removal of the __weak
hw_perf_enable() interface.
- b0a873ebbf87bf38bf70b5e39a7cadc96099fa13
perf: Register PMU implementations
Simple registration interface for struct pmu, this provides the
infrastructure for removing all the weak functions.
- 51b0fe39549a04858001922919ab355dee9bdfcf
perf: Deconstify struct pmu
sed -ie 's/const struct pmu\>/struct pmu/g' `git grep -l "const struct pmu\>"`
Reported-by: Wu Zhangjin <wuzhangjin@gmail.com>
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
To: a.p.zijlstra@chello.nl
To: fweisbec@gmail.com
To: will.deacon@arm.com
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: wuzhangjin@gmail.com
Cc: paulus@samba.org
Cc: mingo@elte.hu
Cc: acme@redhat.com
Cc: dengcheng.zhu@gmail.com
Cc: matt@console-pimps.org
Cc: sshtylyov@mvista.com
Cc: ddaney@caviumnetworks.com
Patchwork: http://patchwork.linux-mips.org/patch/2012/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-01-21 01:19:18 -07:00
|
|
|
perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
|
|
|
|
|
2010-10-12 05:37:24 -06:00
|
|
|
return 0;
|
|
|
|
}
|
2010-11-25 10:38:29 -07:00
|
|
|
early_initcall(init_hw_perf_events);
|