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@@ -1,13 +1,112 @@
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-#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) || \
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- defined(CONFIG_CPU_R10000) || defined(CONFIG_CPU_SB1)
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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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+ * Copyright (C) 2011 Cavium Networks, Inc.
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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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+
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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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+
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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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+
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+#define MIPS_MAX_HWEVENTS 4
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+
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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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+ /*
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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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+ /*
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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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+
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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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+ #define CNTR_ALL 0xffffffff
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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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+
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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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+
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+#define UNSUPPORTED_PERF_EVENT_ID 0xffffffff
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+#define C(x) PERF_COUNT_HW_CACHE_##x
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+
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+struct mips_pmu {
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+ u64 max_period;
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+ u64 valid_count;
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+ u64 overflow;
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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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+
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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 (1UL << 0)
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-#define M_PERFCTL_KERNEL (1UL << 1)
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-#define M_PERFCTL_SUPERVISOR (1UL << 2)
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-#define M_PERFCTL_USER (1UL << 3)
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-#define M_PERFCTL_INTERRUPT_ENABLE (1UL << 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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@@ -15,8 +114,8 @@
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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 (1UL << 30)
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-#define M_PERFCTL_MORE (1UL << 31)
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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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@@ -31,11 +130,12 @@
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#endif
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#define M_PERFCTL_EVENT_MASK 0xfe0
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-#define M_COUNTER_OVERFLOW (1UL << 31)
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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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/*
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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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@@ -49,210 +149,674 @@ static int cpu_has_mipsmt_pertccounters;
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#endif
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/* Copied from op_model_mipsxx.c */
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-static inline unsigned int vpe_shift(void)
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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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-#else /* !CONFIG_MIPS_MT_SMP */
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-#define vpe_id() 0
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-
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-static inline unsigned int vpe_shift(void)
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-{
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- return 0;
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-}
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-#endif /* CONFIG_MIPS_MT_SMP */
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-static inline unsigned int
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-counters_total_to_per_cpu(unsigned int counters)
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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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-static inline unsigned int
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-counters_per_cpu_to_total(unsigned int counters)
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+static unsigned int counters_per_cpu_to_total(unsigned int counters)
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{
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return counters << vpe_shift();
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}
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-#define __define_perf_accessors(r, n, np) \
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- \
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-static inline unsigned int r_c0_ ## r ## n(void) \
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-{ \
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- unsigned int cpu = vpe_id(); \
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- \
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- switch (cpu) { \
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- case 0: \
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- return read_c0_ ## r ## n(); \
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- case 1: \
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- return read_c0_ ## r ## np(); \
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- default: \
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- BUG(); \
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- } \
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- return 0; \
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-} \
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- \
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-static inline void w_c0_ ## r ## n(unsigned int value) \
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-{ \
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- unsigned int cpu = vpe_id(); \
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- \
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- switch (cpu) { \
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- case 0: \
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- write_c0_ ## r ## n(value); \
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- return; \
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- case 1: \
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- write_c0_ ## r ## np(value); \
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- return; \
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- default: \
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- BUG(); \
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- } \
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- return; \
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-} \
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-
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-__define_perf_accessors(perfcntr, 0, 2)
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-__define_perf_accessors(perfcntr, 1, 3)
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-__define_perf_accessors(perfcntr, 2, 0)
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-__define_perf_accessors(perfcntr, 3, 1)
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-
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-__define_perf_accessors(perfctrl, 0, 2)
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-__define_perf_accessors(perfctrl, 1, 3)
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-__define_perf_accessors(perfctrl, 2, 0)
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-__define_perf_accessors(perfctrl, 3, 1)
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-
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-static inline int __n_counters(void)
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-{
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- if (!(read_c0_config1() & M_CONFIG1_PC))
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- return 0;
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- if (!(read_c0_perfctrl0() & M_PERFCTL_MORE))
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- return 1;
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- if (!(read_c0_perfctrl1() & M_PERFCTL_MORE))
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- return 2;
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- if (!(read_c0_perfctrl2() & M_PERFCTL_MORE))
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- return 3;
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+#else /* !CONFIG_MIPS_MT_SMP */
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+#define vpe_id() 0
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- return 4;
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+#endif /* CONFIG_MIPS_MT_SMP */
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+
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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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+
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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 inline int n_counters(void)
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+static u64 mipsxx_pmu_read_counter(unsigned int idx)
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{
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- int counters;
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+ idx = mipsxx_pmu_swizzle_perf_idx(idx);
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- switch (current_cpu_type()) {
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- case CPU_R10000:
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- counters = 2;
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- break;
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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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- case CPU_R12000:
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- case CPU_R14000:
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- counters = 4;
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- break;
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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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- counters = __n_counters();
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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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- return counters;
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}
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-static void reset_counters(void *arg)
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+static void mipsxx_pmu_write_counter(unsigned int idx, u64 val)
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{
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- int counters = (int)(long)arg;
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- switch (counters) {
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- case 4:
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- w_c0_perfctrl3(0);
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- w_c0_perfcntr3(0);
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- case 3:
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- w_c0_perfctrl2(0);
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- w_c0_perfcntr2(0);
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+ idx = mipsxx_pmu_swizzle_perf_idx(idx);
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+
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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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- w_c0_perfctrl1(0);
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- w_c0_perfcntr1(0);
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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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+
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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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+
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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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- w_c0_perfctrl0(0);
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- w_c0_perfcntr0(0);
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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 inline u64
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-mipsxx_pmu_read_counter(unsigned int idx)
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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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+
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switch (idx) {
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case 0:
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- return r_c0_perfcntr0();
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+ return read_c0_perfctrl0();
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case 1:
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- return r_c0_perfcntr1();
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+ return read_c0_perfctrl1();
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case 2:
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- return r_c0_perfcntr2();
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+ return read_c0_perfctrl2();
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case 3:
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- return r_c0_perfcntr3();
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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 inline void
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-mipsxx_pmu_write_counter(unsigned int idx, u64 val)
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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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+
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switch (idx) {
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case 0:
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- w_c0_perfcntr0(val);
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+ write_c0_perfctrl0(val);
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return;
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case 1:
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- w_c0_perfcntr1(val);
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+ write_c0_perfctrl1(val);
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return;
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case 2:
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- w_c0_perfcntr2(val);
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+ write_c0_perfctrl2(val);
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return;
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case 3:
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- w_c0_perfcntr3(val);
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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 inline unsigned int
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-mipsxx_pmu_read_control(unsigned int idx)
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+static int mipsxx_pmu_alloc_counter(struct cpu_hw_events *cpuc,
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+ struct hw_perf_event *hwc)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * We only need to care the counter mask. The range has been
|
|
|
+ * checked definitely.
|
|
|
+ */
|
|
|
+ unsigned long cntr_mask = (hwc->event_base >> 8) & 0xffff;
|
|
|
+
|
|
|
+ for (i = mipspmu.num_counters - 1; i >= 0; i--) {
|
|
|
+ /*
|
|
|
+ * Note that some MIPS perf events can be counted by both
|
|
|
+ * even and odd counters, wheresas many other are only by
|
|
|
+ * even _or_ odd counters. This introduces an issue that
|
|
|
+ * when the former kind of event takes the counter the
|
|
|
+ * latter kind of event wants to use, then the "counter
|
|
|
+ * allocation" for the latter event will fail. In fact if
|
|
|
+ * they can be dynamically swapped, they both feel happy.
|
|
|
+ * But here we leave this issue alone for now.
|
|
|
+ */
|
|
|
+ if (test_bit(i, &cntr_mask) &&
|
|
|
+ !test_and_set_bit(i, cpuc->used_mask))
|
|
|
+ return i;
|
|
|
+ }
|
|
|
+
|
|
|
+ return -EAGAIN;
|
|
|
+}
|
|
|
+
|
|
|
+static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
|
|
|
+{
|
|
|
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
+
|
|
|
+ WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
|
|
|
+
|
|
|
+ cpuc->saved_ctrl[idx] = M_PERFCTL_EVENT(evt->event_base & 0xff) |
|
|
|
+ (evt->config_base & M_PERFCTL_CONFIG_MASK) |
|
|
|
+ /* Make sure interrupt enabled. */
|
|
|
+ M_PERFCTL_INTERRUPT_ENABLE;
|
|
|
+ /*
|
|
|
+ * We do not actually let the counter run. Leave it until start().
|
|
|
+ */
|
|
|
+}
|
|
|
+
|
|
|
+static void mipsxx_pmu_disable_event(int idx)
|
|
|
+{
|
|
|
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
+ unsigned long flags;
|
|
|
+
|
|
|
+ WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
|
|
|
+
|
|
|
+ local_irq_save(flags);
|
|
|
+ cpuc->saved_ctrl[idx] = mipsxx_pmu_read_control(idx) &
|
|
|
+ ~M_PERFCTL_COUNT_EVENT_WHENEVER;
|
|
|
+ mipsxx_pmu_write_control(idx, cpuc->saved_ctrl[idx]);
|
|
|
+ local_irq_restore(flags);
|
|
|
+}
|
|
|
+
|
|
|
+static int mipspmu_event_set_period(struct perf_event *event,
|
|
|
+ struct hw_perf_event *hwc,
|
|
|
+ int idx)
|
|
|
+{
|
|
|
+ u64 left = local64_read(&hwc->period_left);
|
|
|
+ u64 period = hwc->sample_period;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ if (unlikely((left + period) & (1ULL << 63))) {
|
|
|
+ /* left underflowed by more than period. */
|
|
|
+ left = period;
|
|
|
+ local64_set(&hwc->period_left, left);
|
|
|
+ hwc->last_period = period;
|
|
|
+ ret = 1;
|
|
|
+ } else if (unlikely((left + period) <= period)) {
|
|
|
+ /* left underflowed by less than period. */
|
|
|
+ left += period;
|
|
|
+ local64_set(&hwc->period_left, left);
|
|
|
+ hwc->last_period = period;
|
|
|
+ ret = 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (left > mipspmu.max_period) {
|
|
|
+ left = mipspmu.max_period;
|
|
|
+ local64_set(&hwc->period_left, left);
|
|
|
+ }
|
|
|
+
|
|
|
+ local64_set(&hwc->prev_count, mipspmu.overflow - left);
|
|
|
+
|
|
|
+ mipspmu.write_counter(idx, mipspmu.overflow - left);
|
|
|
+
|
|
|
+ perf_event_update_userpage(event);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static void mipspmu_event_update(struct perf_event *event,
|
|
|
+ struct hw_perf_event *hwc,
|
|
|
+ int idx)
|
|
|
+{
|
|
|
+ u64 prev_raw_count, new_raw_count;
|
|
|
+ u64 delta;
|
|
|
+
|
|
|
+again:
|
|
|
+ prev_raw_count = local64_read(&hwc->prev_count);
|
|
|
+ new_raw_count = mipspmu.read_counter(idx);
|
|
|
+
|
|
|
+ if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
|
|
|
+ new_raw_count) != prev_raw_count)
|
|
|
+ goto again;
|
|
|
+
|
|
|
+ delta = new_raw_count - prev_raw_count;
|
|
|
+
|
|
|
+ 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. */
|
|
|
+ mipsxx_pmu_enable_event(hwc, hwc->idx);
|
|
|
+}
|
|
|
+
|
|
|
+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. */
|
|
|
+ mipsxx_pmu_disable_event(hwc->idx);
|
|
|
+ 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. */
|
|
|
+ idx = mipsxx_pmu_alloc_counter(cpuc, hwc);
|
|
|
+ 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;
|
|
|
+ mipsxx_pmu_disable_event(idx);
|
|
|
+ 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;
|
|
|
+
|
|
|
+ WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
|
|
|
+
|
|
|
+ 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)
|
|
|
+{
|
|
|
+#ifdef CONFIG_MIPS_MT_SMP
|
|
|
+ write_unlock(&pmuint_rwlock);
|
|
|
+#endif
|
|
|
+ resume_local_counters();
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * 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.
|
|
|
+ */
|
|
|
+static void mipspmu_disable(struct pmu *pmu)
|
|
|
+{
|
|
|
+ pause_local_counters();
|
|
|
+#ifdef CONFIG_MIPS_MT_SMP
|
|
|
+ write_lock(&pmuint_rwlock);
|
|
|
+#endif
|
|
|
+}
|
|
|
+
|
|
|
+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;
|
|
|
+
|
|
|
+ if (mipspmu.irq >= 0) {
|
|
|
+ /* Request my own irq handler. */
|
|
|
+ err = request_irq(mipspmu.irq, mipsxx_pmu_handle_irq,
|
|
|
+ IRQF_PERCPU | IRQF_NOBALANCING,
|
|
|
+ "mips_perf_pmu", NULL);
|
|
|
+ if (err) {
|
|
|
+ pr_warning("Unable to request IRQ%d for MIPS "
|
|
|
+ "performance counters!\n", mipspmu.irq);
|
|
|
+ }
|
|
|
+ } else if (cp0_perfcount_irq < 0) {
|
|
|
+ /*
|
|
|
+ * We are sharing the irq number with the timer interrupt.
|
|
|
+ */
|
|
|
+ save_perf_irq = perf_irq;
|
|
|
+ perf_irq = mipsxx_pmu_handle_shared_irq;
|
|
|
+ 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)
|
|
|
+{
|
|
|
+ if (mipspmu.irq >= 0)
|
|
|
+ free_irq(mipspmu.irq, NULL);
|
|
|
+ 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,
|
|
|
+ (void *)(long)mipspmu.num_counters, 1);
|
|
|
+ mipspmu_free_irq();
|
|
|
+ mutex_unlock(&pmu_reserve_mutex);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static int mipspmu_event_init(struct perf_event *event)
|
|
|
+{
|
|
|
+ int err = 0;
|
|
|
+
|
|
|
+ switch (event->attr.type) {
|
|
|
+ case PERF_TYPE_RAW:
|
|
|
+ case PERF_TYPE_HARDWARE:
|
|
|
+ case PERF_TYPE_HW_CACHE:
|
|
|
+ break;
|
|
|
+
|
|
|
+ default:
|
|
|
+ return -ENOENT;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (event->cpu >= nr_cpumask_bits ||
|
|
|
+ (event->cpu >= 0 && !cpu_online(event->cpu)))
|
|
|
+ return -ENODEV;
|
|
|
+
|
|
|
+ if (!atomic_inc_not_zero(&active_events)) {
|
|
|
+ if (atomic_read(&active_events) > MIPS_MAX_HWEVENTS) {
|
|
|
+ atomic_dec(&active_events);
|
|
|
+ return -ENOSPC;
|
|
|
+ }
|
|
|
+
|
|
|
+ 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;
|
|
|
+
|
|
|
+ err = __hw_perf_event_init(event);
|
|
|
+ if (err)
|
|
|
+ hw_perf_event_destroy(event);
|
|
|
+
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+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)
|
|
|
+{
|
|
|
+ const struct mips_perf_event *pev;
|
|
|
+
|
|
|
+ pev = ((*mipspmu.general_event_map)[idx].event_id ==
|
|
|
+ UNSUPPORTED_PERF_EVENT_ID ? ERR_PTR(-EOPNOTSUPP) :
|
|
|
+ &(*mipspmu.general_event_map)[idx]);
|
|
|
+
|
|
|
+ return pev;
|
|
|
+}
|
|
|
+
|
|
|
+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);
|
|
|
+
|
|
|
+ pev = &((*mipspmu.cache_event_map)
|
|
|
+ [cache_type]
|
|
|
+ [cache_op]
|
|
|
+ [cache_result]);
|
|
|
+
|
|
|
+ if (pev->event_id == UNSUPPORTED_PERF_EVENT_ID)
|
|
|
+ return ERR_PTR(-EOPNOTSUPP);
|
|
|
+
|
|
|
+ return pev;
|
|
|
+
|
|
|
+}
|
|
|
+
|
|
|
+static int validate_event(struct cpu_hw_events *cpuc,
|
|
|
+ struct perf_event *event)
|
|
|
+{
|
|
|
+ struct hw_perf_event fake_hwc = event->hw;
|
|
|
+
|
|
|
+ /* Allow mixed event group. So return 1 to pass validation. */
|
|
|
+ if (event->pmu != &pmu || event->state <= PERF_EVENT_STATE_OFF)
|
|
|
+ return 1;
|
|
|
+
|
|
|
+ return mipsxx_pmu_alloc_counter(cpuc, &fake_hwc) >= 0;
|
|
|
+}
|
|
|
+
|
|
|
+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));
|
|
|
+
|
|
|
+ if (!validate_event(&fake_cpuc, leader))
|
|
|
+ return -ENOSPC;
|
|
|
+
|
|
|
+ list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
|
|
|
+ if (!validate_event(&fake_cpuc, sibling))
|
|
|
+ return -ENOSPC;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!validate_event(&fake_cpuc, event))
|
|
|
+ return -ENOSPC;
|
|
|
+
|
|
|
+ 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))
|
|
|
+ mipsxx_pmu_disable_event(idx);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+static int __n_counters(void)
|
|
|
+{
|
|
|
+ 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;
|
|
|
+}
|
|
|
+
|
|
|
+static int n_counters(void)
|
|
|
{
|
|
|
- switch (idx) {
|
|
|
- case 0:
|
|
|
- return r_c0_perfctrl0();
|
|
|
- case 1:
|
|
|
- return r_c0_perfctrl1();
|
|
|
- case 2:
|
|
|
- return r_c0_perfctrl2();
|
|
|
- case 3:
|
|
|
- return r_c0_perfctrl3();
|
|
|
+ int counters;
|
|
|
+
|
|
|
+ switch (current_cpu_type()) {
|
|
|
+ case CPU_R10000:
|
|
|
+ counters = 2;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case CPU_R12000:
|
|
|
+ case CPU_R14000:
|
|
|
+ counters = 4;
|
|
|
+ break;
|
|
|
+
|
|
|
default:
|
|
|
- WARN_ONCE(1, "Invalid performance counter number (%d)\n", idx);
|
|
|
- return 0;
|
|
|
+ counters = __n_counters();
|
|
|
}
|
|
|
+
|
|
|
+ return counters;
|
|
|
}
|
|
|
|
|
|
-static inline void
|
|
|
-mipsxx_pmu_write_control(unsigned int idx, unsigned int val)
|
|
|
+static void reset_counters(void *arg)
|
|
|
{
|
|
|
- switch (idx) {
|
|
|
- case 0:
|
|
|
- w_c0_perfctrl0(val);
|
|
|
- return;
|
|
|
- case 1:
|
|
|
- w_c0_perfctrl1(val);
|
|
|
- return;
|
|
|
- case 2:
|
|
|
- w_c0_perfctrl2(val);
|
|
|
- return;
|
|
|
+ int counters = (int)(long)arg;
|
|
|
+ switch (counters) {
|
|
|
+ case 4:
|
|
|
+ mipsxx_pmu_write_control(3, 0);
|
|
|
+ mipspmu.write_counter(3, 0);
|
|
|
case 3:
|
|
|
- w_c0_perfctrl3(val);
|
|
|
- return;
|
|
|
+ mipsxx_pmu_write_control(2, 0);
|
|
|
+ mipspmu.write_counter(2, 0);
|
|
|
+ case 2:
|
|
|
+ mipsxx_pmu_write_control(1, 0);
|
|
|
+ mipspmu.write_counter(1, 0);
|
|
|
+ case 1:
|
|
|
+ mipsxx_pmu_write_control(0, 0);
|
|
|
+ mipspmu.write_counter(0, 0);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
-#ifdef CONFIG_MIPS_MT_SMP
|
|
|
-static DEFINE_RWLOCK(pmuint_rwlock);
|
|
|
-#endif
|
|
|
-
|
|
|
/* 24K/34K/1004K cores can share the same event map. */
|
|
|
static const struct mips_perf_event mipsxxcore_event_map
|
|
|
[PERF_COUNT_HW_MAX] = {
|
|
@@ -277,6 +841,16 @@ static const struct mips_perf_event mipsxx74Kcore_event_map
|
|
|
[PERF_COUNT_HW_BUS_CYCLES] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
};
|
|
|
|
|
|
+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 },
|
|
|
+};
|
|
|
+
|
|
|
/* 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]
|
|
@@ -510,10 +1084,105 @@ static const struct mips_perf_event mipsxx74Kcore_cache_map
|
|
|
},
|
|
|
};
|
|
|
|
|
|
+
|
|
|
+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(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+ [C(OP_PREFETCH)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+},
|
|
|
+[C(L1I)] = {
|
|
|
+ [C(OP_READ)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { 0x18, CNTR_ALL },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+ [C(OP_WRITE)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+ [C(OP_PREFETCH)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { 0x19, CNTR_ALL },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+},
|
|
|
+[C(LL)] = {
|
|
|
+ [C(OP_READ)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+ [C(OP_WRITE)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+ [C(OP_PREFETCH)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+},
|
|
|
+[C(DTLB)] = {
|
|
|
+ /*
|
|
|
+ * Only general DTLB misses are counted use the same event for
|
|
|
+ * read and write.
|
|
|
+ */
|
|
|
+ [C(OP_READ)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { 0x35, CNTR_ALL },
|
|
|
+ },
|
|
|
+ [C(OP_WRITE)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { 0x35, CNTR_ALL },
|
|
|
+ },
|
|
|
+ [C(OP_PREFETCH)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+},
|
|
|
+[C(ITLB)] = {
|
|
|
+ [C(OP_READ)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { 0x37, CNTR_ALL },
|
|
|
+ },
|
|
|
+ [C(OP_WRITE)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+ [C(OP_PREFETCH)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+},
|
|
|
+[C(BPU)] = {
|
|
|
+ /* Using the same code for *HW_BRANCH* */
|
|
|
+ [C(OP_READ)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+ [C(OP_WRITE)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+ [C(OP_PREFETCH)] = {
|
|
|
+ [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID },
|
|
|
+ },
|
|
|
+},
|
|
|
+};
|
|
|
+
|
|
|
#ifdef CONFIG_MIPS_MT_SMP
|
|
|
-static void
|
|
|
-check_and_calc_range(struct perf_event *event,
|
|
|
- const struct mips_perf_event *pev)
|
|
|
+static void check_and_calc_range(struct perf_event *event,
|
|
|
+ const struct mips_perf_event *pev)
|
|
|
{
|
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
|
|
|
@@ -536,9 +1205,8 @@ check_and_calc_range(struct perf_event *event,
|
|
|
hwc->config_base |= M_TC_EN_ALL;
|
|
|
}
|
|
|
#else
|
|
|
-static void
|
|
|
-check_and_calc_range(struct perf_event *event,
|
|
|
- const struct mips_perf_event *pev)
|
|
|
+static void check_and_calc_range(struct perf_event *event,
|
|
|
+ const struct mips_perf_event *pev)
|
|
|
{
|
|
|
}
|
|
|
#endif
|
|
@@ -560,7 +1228,7 @@ static int __hw_perf_event_init(struct perf_event *event)
|
|
|
} else if (PERF_TYPE_RAW == event->attr.type) {
|
|
|
/* We are working on the global raw event. */
|
|
|
mutex_lock(&raw_event_mutex);
|
|
|
- pev = mipspmu->map_raw_event(event->attr.config);
|
|
|
+ pev = mipspmu.map_raw_event(event->attr.config);
|
|
|
} else {
|
|
|
/* The event type is not (yet) supported. */
|
|
|
return -EOPNOTSUPP;
|
|
@@ -605,7 +1273,7 @@ static int __hw_perf_event_init(struct perf_event *event)
|
|
|
hwc->config = 0;
|
|
|
|
|
|
if (!hwc->sample_period) {
|
|
|
- hwc->sample_period = MAX_PERIOD;
|
|
|
+ hwc->sample_period = mipspmu.max_period;
|
|
|
hwc->last_period = hwc->sample_period;
|
|
|
local64_set(&hwc->period_left, hwc->sample_period);
|
|
|
}
|
|
@@ -618,70 +1286,47 @@ static int __hw_perf_event_init(struct perf_event *event)
|
|
|
}
|
|
|
|
|
|
event->destroy = hw_perf_event_destroy;
|
|
|
-
|
|
|
return err;
|
|
|
}
|
|
|
|
|
|
static void pause_local_counters(void)
|
|
|
{
|
|
|
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
- int counters = mipspmu->num_counters;
|
|
|
+ int ctr = mipspmu.num_counters;
|
|
|
unsigned long flags;
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
- switch (counters) {
|
|
|
- case 4:
|
|
|
- cpuc->saved_ctrl[3] = r_c0_perfctrl3();
|
|
|
- w_c0_perfctrl3(cpuc->saved_ctrl[3] &
|
|
|
- ~M_PERFCTL_COUNT_EVENT_WHENEVER);
|
|
|
- case 3:
|
|
|
- cpuc->saved_ctrl[2] = r_c0_perfctrl2();
|
|
|
- w_c0_perfctrl2(cpuc->saved_ctrl[2] &
|
|
|
- ~M_PERFCTL_COUNT_EVENT_WHENEVER);
|
|
|
- case 2:
|
|
|
- cpuc->saved_ctrl[1] = r_c0_perfctrl1();
|
|
|
- w_c0_perfctrl1(cpuc->saved_ctrl[1] &
|
|
|
- ~M_PERFCTL_COUNT_EVENT_WHENEVER);
|
|
|
- case 1:
|
|
|
- cpuc->saved_ctrl[0] = r_c0_perfctrl0();
|
|
|
- w_c0_perfctrl0(cpuc->saved_ctrl[0] &
|
|
|
- ~M_PERFCTL_COUNT_EVENT_WHENEVER);
|
|
|
- }
|
|
|
+ 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);
|
|
|
local_irq_restore(flags);
|
|
|
}
|
|
|
|
|
|
static void resume_local_counters(void)
|
|
|
{
|
|
|
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
- int counters = mipspmu->num_counters;
|
|
|
- unsigned long flags;
|
|
|
+ int ctr = mipspmu.num_counters;
|
|
|
|
|
|
- local_irq_save(flags);
|
|
|
- switch (counters) {
|
|
|
- case 4:
|
|
|
- w_c0_perfctrl3(cpuc->saved_ctrl[3]);
|
|
|
- case 3:
|
|
|
- w_c0_perfctrl2(cpuc->saved_ctrl[2]);
|
|
|
- case 2:
|
|
|
- w_c0_perfctrl1(cpuc->saved_ctrl[1]);
|
|
|
- case 1:
|
|
|
- w_c0_perfctrl0(cpuc->saved_ctrl[0]);
|
|
|
- }
|
|
|
- local_irq_restore(flags);
|
|
|
+ do {
|
|
|
+ ctr--;
|
|
|
+ mipsxx_pmu_write_control(ctr, cpuc->saved_ctrl[ctr]);
|
|
|
+ } while (ctr > 0);
|
|
|
}
|
|
|
|
|
|
static int mipsxx_pmu_handle_shared_irq(void)
|
|
|
{
|
|
|
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
struct perf_sample_data data;
|
|
|
- unsigned int counters = mipspmu->num_counters;
|
|
|
- unsigned int counter;
|
|
|
+ unsigned int counters = mipspmu.num_counters;
|
|
|
+ u64 counter;
|
|
|
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
|
|
@@ -702,13 +1347,9 @@ static int mipsxx_pmu_handle_shared_irq(void)
|
|
|
#define HANDLE_COUNTER(n) \
|
|
|
case n + 1: \
|
|
|
if (test_bit(n, cpuc->used_mask)) { \
|
|
|
- counter = r_c0_perfcntr ## n(); \
|
|
|
- if (counter & M_COUNTER_OVERFLOW) { \
|
|
|
- w_c0_perfcntr ## n(counter & \
|
|
|
- VALID_COUNT); \
|
|
|
- if (test_and_change_bit(n, cpuc->msbs)) \
|
|
|
- handle_associated_event(cpuc, \
|
|
|
- n, &data, regs); \
|
|
|
+ counter = mipspmu.read_counter(n); \
|
|
|
+ if (counter & mipspmu.overflow) { \
|
|
|
+ handle_associated_event(cpuc, n, &data, regs); \
|
|
|
handled = IRQ_HANDLED; \
|
|
|
} \
|
|
|
}
|
|
@@ -733,104 +1374,11 @@ static int mipsxx_pmu_handle_shared_irq(void)
|
|
|
return handled;
|
|
|
}
|
|
|
|
|
|
-static irqreturn_t
|
|
|
-mipsxx_pmu_handle_irq(int irq, void *dev)
|
|
|
+static irqreturn_t mipsxx_pmu_handle_irq(int irq, void *dev)
|
|
|
{
|
|
|
return mipsxx_pmu_handle_shared_irq();
|
|
|
}
|
|
|
|
|
|
-static void mipsxx_pmu_start(void)
|
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|
-{
|
|
|
-#ifdef CONFIG_MIPS_MT_SMP
|
|
|
- write_unlock(&pmuint_rwlock);
|
|
|
-#endif
|
|
|
- resume_local_counters();
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * MIPS performance counters can be per-TC. The control registers can
|
|
|
- * not be directly accessed across CPUs. Hence if we want to do global
|
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|
- * control, we need cross CPU calls. on_each_cpu() can help us, but we
|
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|
- * can not make sure this function is called with interrupts enabled. So
|
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|
- * 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.
|
|
|
- */
|
|
|
-static void mipsxx_pmu_stop(void)
|
|
|
-{
|
|
|
- pause_local_counters();
|
|
|
-#ifdef CONFIG_MIPS_MT_SMP
|
|
|
- write_lock(&pmuint_rwlock);
|
|
|
-#endif
|
|
|
-}
|
|
|
-
|
|
|
-static int
|
|
|
-mipsxx_pmu_alloc_counter(struct cpu_hw_events *cpuc,
|
|
|
- struct hw_perf_event *hwc)
|
|
|
-{
|
|
|
- int i;
|
|
|
-
|
|
|
- /*
|
|
|
- * We only need to care the counter mask. The range has been
|
|
|
- * checked definitely.
|
|
|
- */
|
|
|
- unsigned long cntr_mask = (hwc->event_base >> 8) & 0xffff;
|
|
|
-
|
|
|
- for (i = mipspmu->num_counters - 1; i >= 0; i--) {
|
|
|
- /*
|
|
|
- * Note that some MIPS perf events can be counted by both
|
|
|
- * even and odd counters, wheresas many other are only by
|
|
|
- * even _or_ odd counters. This introduces an issue that
|
|
|
- * when the former kind of event takes the counter the
|
|
|
- * latter kind of event wants to use, then the "counter
|
|
|
- * allocation" for the latter event will fail. In fact if
|
|
|
- * they can be dynamically swapped, they both feel happy.
|
|
|
- * But here we leave this issue alone for now.
|
|
|
- */
|
|
|
- if (test_bit(i, &cntr_mask) &&
|
|
|
- !test_and_set_bit(i, cpuc->used_mask))
|
|
|
- return i;
|
|
|
- }
|
|
|
-
|
|
|
- return -EAGAIN;
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
|
|
|
-{
|
|
|
- struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
- unsigned long flags;
|
|
|
-
|
|
|
- WARN_ON(idx < 0 || idx >= mipspmu->num_counters);
|
|
|
-
|
|
|
- local_irq_save(flags);
|
|
|
- cpuc->saved_ctrl[idx] = M_PERFCTL_EVENT(evt->event_base & 0xff) |
|
|
|
- (evt->config_base & M_PERFCTL_CONFIG_MASK) |
|
|
|
- /* Make sure interrupt enabled. */
|
|
|
- M_PERFCTL_INTERRUPT_ENABLE;
|
|
|
- /*
|
|
|
- * We do not actually let the counter run. Leave it until start().
|
|
|
- */
|
|
|
- local_irq_restore(flags);
|
|
|
-}
|
|
|
-
|
|
|
-static void
|
|
|
-mipsxx_pmu_disable_event(int idx)
|
|
|
-{
|
|
|
- struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
|
|
|
- unsigned long flags;
|
|
|
-
|
|
|
- WARN_ON(idx < 0 || idx >= mipspmu->num_counters);
|
|
|
-
|
|
|
- local_irq_save(flags);
|
|
|
- cpuc->saved_ctrl[idx] = mipsxx_pmu_read_control(idx) &
|
|
|
- ~M_PERFCTL_COUNT_EVENT_WHENEVER;
|
|
|
- mipsxx_pmu_write_control(idx, cpuc->saved_ctrl[idx]);
|
|
|
- local_irq_restore(flags);
|
|
|
-}
|
|
|
-
|
|
|
/* 24K */
|
|
|
#define IS_UNSUPPORTED_24K_EVENT(r, b) \
|
|
|
((b) == 12 || (r) == 151 || (r) == 152 || (b) == 26 || \
|
|
@@ -892,8 +1440,7 @@ mipsxx_pmu_disable_event(int idx)
|
|
|
* then 128 needs to be added to 15 as the input for the event config,
|
|
|
* i.e., 143 (0x8F) to be used.
|
|
|
*/
|
|
|
-static const struct mips_perf_event *
|
|
|
-mipsxx_pmu_map_raw_event(u64 config)
|
|
|
+static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
|
|
|
{
|
|
|
unsigned int raw_id = config & 0xff;
|
|
|
unsigned int base_id = raw_id & 0x7f;
|
|
@@ -970,40 +1517,44 @@ mipsxx_pmu_map_raw_event(u64 config)
|
|
|
return &raw_event;
|
|
|
}
|
|
|
|
|
|
-static struct mips_pmu mipsxxcore_pmu = {
|
|
|
- .handle_irq = mipsxx_pmu_handle_irq,
|
|
|
- .handle_shared_irq = mipsxx_pmu_handle_shared_irq,
|
|
|
- .start = mipsxx_pmu_start,
|
|
|
- .stop = mipsxx_pmu_stop,
|
|
|
- .alloc_counter = mipsxx_pmu_alloc_counter,
|
|
|
- .read_counter = mipsxx_pmu_read_counter,
|
|
|
- .write_counter = mipsxx_pmu_write_counter,
|
|
|
- .enable_event = mipsxx_pmu_enable_event,
|
|
|
- .disable_event = mipsxx_pmu_disable_event,
|
|
|
- .map_raw_event = mipsxx_pmu_map_raw_event,
|
|
|
- .general_event_map = &mipsxxcore_event_map,
|
|
|
- .cache_event_map = &mipsxxcore_cache_map,
|
|
|
-};
|
|
|
+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;
|
|
|
|
|
|
-static struct mips_pmu mipsxx74Kcore_pmu = {
|
|
|
- .handle_irq = mipsxx_pmu_handle_irq,
|
|
|
- .handle_shared_irq = mipsxx_pmu_handle_shared_irq,
|
|
|
- .start = mipsxx_pmu_start,
|
|
|
- .stop = mipsxx_pmu_stop,
|
|
|
- .alloc_counter = mipsxx_pmu_alloc_counter,
|
|
|
- .read_counter = mipsxx_pmu_read_counter,
|
|
|
- .write_counter = mipsxx_pmu_write_counter,
|
|
|
- .enable_event = mipsxx_pmu_enable_event,
|
|
|
- .disable_event = mipsxx_pmu_disable_event,
|
|
|
- .map_raw_event = mipsxx_pmu_map_raw_event,
|
|
|
- .general_event_map = &mipsxx74Kcore_event_map,
|
|
|
- .cache_event_map = &mipsxx74Kcore_cache_map,
|
|
|
-};
|
|
|
+
|
|
|
+ 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;
|
|
|
+}
|
|
|
|
|
|
static int __init
|
|
|
init_hw_perf_events(void)
|
|
|
{
|
|
|
int counters, irq;
|
|
|
+ int counter_bits;
|
|
|
|
|
|
pr_info("Performance counters: ");
|
|
|
|
|
@@ -1035,32 +1586,36 @@ init_hw_perf_events(void)
|
|
|
}
|
|
|
#endif
|
|
|
|
|
|
- on_each_cpu(reset_counters, (void *)(long)counters, 1);
|
|
|
+ mipspmu.map_raw_event = mipsxx_pmu_map_raw_event;
|
|
|
|
|
|
switch (current_cpu_type()) {
|
|
|
case CPU_24K:
|
|
|
- mipsxxcore_pmu.name = "mips/24K";
|
|
|
- mipsxxcore_pmu.num_counters = counters;
|
|
|
- mipsxxcore_pmu.irq = irq;
|
|
|
- mipspmu = &mipsxxcore_pmu;
|
|
|
+ mipspmu.name = "mips/24K";
|
|
|
+ mipspmu.general_event_map = &mipsxxcore_event_map;
|
|
|
+ mipspmu.cache_event_map = &mipsxxcore_cache_map;
|
|
|
break;
|
|
|
case CPU_34K:
|
|
|
- mipsxxcore_pmu.name = "mips/34K";
|
|
|
- mipsxxcore_pmu.num_counters = counters;
|
|
|
- mipsxxcore_pmu.irq = irq;
|
|
|
- mipspmu = &mipsxxcore_pmu;
|
|
|
+ mipspmu.name = "mips/34K";
|
|
|
+ mipspmu.general_event_map = &mipsxxcore_event_map;
|
|
|
+ mipspmu.cache_event_map = &mipsxxcore_cache_map;
|
|
|
break;
|
|
|
case CPU_74K:
|
|
|
- mipsxx74Kcore_pmu.name = "mips/74K";
|
|
|
- mipsxx74Kcore_pmu.num_counters = counters;
|
|
|
- mipsxx74Kcore_pmu.irq = irq;
|
|
|
- mipspmu = &mipsxx74Kcore_pmu;
|
|
|
+ mipspmu.name = "mips/74K";
|
|
|
+ mipspmu.general_event_map = &mipsxx74Kcore_event_map;
|
|
|
+ mipspmu.cache_event_map = &mipsxx74Kcore_cache_map;
|
|
|
break;
|
|
|
case CPU_1004K:
|
|
|
- mipsxxcore_pmu.name = "mips/1004K";
|
|
|
- mipsxxcore_pmu.num_counters = counters;
|
|
|
- mipsxxcore_pmu.irq = irq;
|
|
|
- mipspmu = &mipsxxcore_pmu;
|
|
|
+ mipspmu.name = "mips/1004K";
|
|
|
+ mipspmu.general_event_map = &mipsxxcore_event_map;
|
|
|
+ mipspmu.cache_event_map = &mipsxxcore_cache_map;
|
|
|
+ break;
|
|
|
+ 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;
|
|
|
default:
|
|
|
pr_cont("Either hardware does not support performance "
|
|
@@ -1068,15 +1623,33 @@ init_hw_perf_events(void)
|
|
|
return -ENODEV;
|
|
|
}
|
|
|
|
|
|
- if (mipspmu)
|
|
|
- pr_cont("%s PMU enabled, %d counters available to each "
|
|
|
- "CPU, irq %d%s\n", mipspmu->name, counters, irq,
|
|
|
- irq < 0 ? " (share with timer interrupt)" : "");
|
|
|
+ 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)" : "");
|
|
|
|
|
|
perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
|
|
|
|
|
|
return 0;
|
|
|
}
|
|
|
early_initcall(init_hw_perf_events);
|
|
|
-
|
|
|
-#endif /* defined(CONFIG_CPU_MIPS32)... */
|