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-rw-r--r--arch/powerpc/perf/generic-compat-pmu.c342
1 files changed, 342 insertions, 0 deletions
diff --git a/arch/powerpc/perf/generic-compat-pmu.c b/arch/powerpc/perf/generic-compat-pmu.c
new file mode 100644
index 000000000..b5c414876
--- /dev/null
+++ b/arch/powerpc/perf/generic-compat-pmu.c
@@ -0,0 +1,342 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright 2019 Madhavan Srinivasan, IBM Corporation.
+
+#define pr_fmt(fmt) "generic-compat-pmu: " fmt
+
+#include "isa207-common.h"
+
+/*
+ * Raw event encoding:
+ *
+ * 60 56 52 48 44 40 36 32
+ * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
+ *
+ * 28 24 20 16 12 8 4 0
+ * | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - | - - - - |
+ * [ pmc ] [ pmcxsel ]
+ */
+
+/*
+ * Event codes defined in ISA v3.0B
+ */
+#define EVENT(_name, _code) _name = _code,
+
+enum {
+ /* Cycles, alternate code */
+ EVENT(PM_CYC_ALT, 0x100f0)
+ /* One or more instructions completed in a cycle */
+ EVENT(PM_CYC_INST_CMPL, 0x100f2)
+ /* Floating-point instruction completed */
+ EVENT(PM_FLOP_CMPL, 0x100f4)
+ /* Instruction ERAT/L1-TLB miss */
+ EVENT(PM_L1_ITLB_MISS, 0x100f6)
+ /* All instructions completed and none available */
+ EVENT(PM_NO_INST_AVAIL, 0x100f8)
+ /* A load-type instruction completed (ISA v3.0+) */
+ EVENT(PM_LD_CMPL, 0x100fc)
+ /* Instruction completed, alternate code (ISA v3.0+) */
+ EVENT(PM_INST_CMPL_ALT, 0x100fe)
+ /* A store-type instruction completed */
+ EVENT(PM_ST_CMPL, 0x200f0)
+ /* Instruction Dispatched */
+ EVENT(PM_INST_DISP, 0x200f2)
+ /* Run_cycles */
+ EVENT(PM_RUN_CYC, 0x200f4)
+ /* Data ERAT/L1-TLB miss/reload */
+ EVENT(PM_L1_DTLB_RELOAD, 0x200f6)
+ /* Taken branch completed */
+ EVENT(PM_BR_TAKEN_CMPL, 0x200fa)
+ /* Demand iCache Miss */
+ EVENT(PM_L1_ICACHE_MISS, 0x200fc)
+ /* L1 Dcache reload from memory */
+ EVENT(PM_L1_RELOAD_FROM_MEM, 0x200fe)
+ /* L1 Dcache store miss */
+ EVENT(PM_ST_MISS_L1, 0x300f0)
+ /* Alternate code for PM_INST_DISP */
+ EVENT(PM_INST_DISP_ALT, 0x300f2)
+ /* Branch direction or target mispredicted */
+ EVENT(PM_BR_MISPREDICT, 0x300f6)
+ /* Data TLB miss/reload */
+ EVENT(PM_DTLB_MISS, 0x300fc)
+ /* Demand LD - L3 Miss (not L2 hit and not L3 hit) */
+ EVENT(PM_DATA_FROM_L3MISS, 0x300fe)
+ /* L1 Dcache load miss */
+ EVENT(PM_LD_MISS_L1, 0x400f0)
+ /* Cycle when instruction(s) dispatched */
+ EVENT(PM_CYC_INST_DISP, 0x400f2)
+ /* Branch or branch target mispredicted */
+ EVENT(PM_BR_MPRED_CMPL, 0x400f6)
+ /* Instructions completed with run latch set */
+ EVENT(PM_RUN_INST_CMPL, 0x400fa)
+ /* Instruction TLB miss/reload */
+ EVENT(PM_ITLB_MISS, 0x400fc)
+ /* Load data not cached */
+ EVENT(PM_LD_NOT_CACHED, 0x400fe)
+ /* Instructions */
+ EVENT(PM_INST_CMPL, 0x500fa)
+ /* Cycles */
+ EVENT(PM_CYC, 0x600f4)
+};
+
+#undef EVENT
+
+/* Table of alternatives, sorted in increasing order of column 0 */
+/* Note that in each row, column 0 must be the smallest */
+static const unsigned int generic_event_alternatives[][MAX_ALT] = {
+ { PM_CYC_ALT, PM_CYC },
+ { PM_INST_CMPL_ALT, PM_INST_CMPL },
+ { PM_INST_DISP, PM_INST_DISP_ALT },
+};
+
+static int generic_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+{
+ int num_alt = 0;
+
+ num_alt = isa207_get_alternatives(event, alt,
+ ARRAY_SIZE(generic_event_alternatives), flags,
+ generic_event_alternatives);
+
+ return num_alt;
+}
+
+GENERIC_EVENT_ATTR(cpu-cycles, PM_CYC);
+GENERIC_EVENT_ATTR(instructions, PM_INST_CMPL);
+GENERIC_EVENT_ATTR(stalled-cycles-frontend, PM_NO_INST_AVAIL);
+GENERIC_EVENT_ATTR(branch-misses, PM_BR_MPRED_CMPL);
+GENERIC_EVENT_ATTR(cache-misses, PM_LD_MISS_L1);
+
+CACHE_EVENT_ATTR(L1-dcache-load-misses, PM_LD_MISS_L1);
+CACHE_EVENT_ATTR(L1-dcache-store-misses, PM_ST_MISS_L1);
+CACHE_EVENT_ATTR(L1-icache-load-misses, PM_L1_ICACHE_MISS);
+CACHE_EVENT_ATTR(LLC-load-misses, PM_DATA_FROM_L3MISS);
+CACHE_EVENT_ATTR(branch-load-misses, PM_BR_MPRED_CMPL);
+CACHE_EVENT_ATTR(dTLB-load-misses, PM_DTLB_MISS);
+CACHE_EVENT_ATTR(iTLB-load-misses, PM_ITLB_MISS);
+
+static struct attribute *generic_compat_events_attr[] = {
+ GENERIC_EVENT_PTR(PM_CYC),
+ GENERIC_EVENT_PTR(PM_INST_CMPL),
+ GENERIC_EVENT_PTR(PM_NO_INST_AVAIL),
+ GENERIC_EVENT_PTR(PM_BR_MPRED_CMPL),
+ GENERIC_EVENT_PTR(PM_LD_MISS_L1),
+ CACHE_EVENT_PTR(PM_LD_MISS_L1),
+ CACHE_EVENT_PTR(PM_ST_MISS_L1),
+ CACHE_EVENT_PTR(PM_L1_ICACHE_MISS),
+ CACHE_EVENT_PTR(PM_DATA_FROM_L3MISS),
+ CACHE_EVENT_PTR(PM_BR_MPRED_CMPL),
+ CACHE_EVENT_PTR(PM_DTLB_MISS),
+ CACHE_EVENT_PTR(PM_ITLB_MISS),
+ NULL
+};
+
+static const struct attribute_group generic_compat_pmu_events_group = {
+ .name = "events",
+ .attrs = generic_compat_events_attr,
+};
+
+PMU_FORMAT_ATTR(event, "config:0-19");
+PMU_FORMAT_ATTR(pmcxsel, "config:0-7");
+PMU_FORMAT_ATTR(pmc, "config:16-19");
+
+static struct attribute *generic_compat_pmu_format_attr[] = {
+ &format_attr_event.attr,
+ &format_attr_pmcxsel.attr,
+ &format_attr_pmc.attr,
+ NULL,
+};
+
+static const struct attribute_group generic_compat_pmu_format_group = {
+ .name = "format",
+ .attrs = generic_compat_pmu_format_attr,
+};
+
+static struct attribute *generic_compat_pmu_caps_attrs[] = {
+ NULL
+};
+
+static struct attribute_group generic_compat_pmu_caps_group = {
+ .name = "caps",
+ .attrs = generic_compat_pmu_caps_attrs,
+};
+
+static const struct attribute_group *generic_compat_pmu_attr_groups[] = {
+ &generic_compat_pmu_format_group,
+ &generic_compat_pmu_events_group,
+ &generic_compat_pmu_caps_group,
+ NULL,
+};
+
+static int compat_generic_events[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = PM_CYC,
+ [PERF_COUNT_HW_INSTRUCTIONS] = PM_INST_CMPL,
+ [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = PM_NO_INST_AVAIL,
+ [PERF_COUNT_HW_BRANCH_MISSES] = PM_BR_MPRED_CMPL,
+ [PERF_COUNT_HW_CACHE_MISSES] = PM_LD_MISS_L1,
+};
+
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static u64 generic_compat_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [ C(L1D) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = PM_LD_MISS_L1,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = PM_ST_MISS_L1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(L1I) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = PM_L1_ICACHE_MISS,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(LL) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = PM_DATA_FROM_L3MISS,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = 0,
+ },
+ },
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = PM_DTLB_MISS,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = PM_ITLB_MISS,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(BPU) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0,
+ [ C(RESULT_MISS) ] = PM_BR_MPRED_CMPL,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+ [ C(NODE) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+#undef C
+
+/*
+ * We set MMCR0[CC5-6RUN] so we can use counters 5 and 6 for
+ * PM_INST_CMPL and PM_CYC.
+ */
+static int generic_compute_mmcr(u64 event[], int n_ev,
+ unsigned int hwc[], struct mmcr_regs *mmcr,
+ struct perf_event *pevents[], u32 flags)
+{
+ int ret;
+
+ ret = isa207_compute_mmcr(event, n_ev, hwc, mmcr, pevents, flags);
+ if (!ret)
+ mmcr->mmcr0 |= MMCR0_C56RUN;
+ return ret;
+}
+
+static struct power_pmu generic_compat_pmu = {
+ .name = "ISAv3",
+ .n_counter = MAX_PMU_COUNTERS,
+ .add_fields = ISA207_ADD_FIELDS,
+ .test_adder = ISA207_TEST_ADDER,
+ .compute_mmcr = generic_compute_mmcr,
+ .get_constraint = isa207_get_constraint,
+ .get_alternatives = generic_get_alternatives,
+ .disable_pmc = isa207_disable_pmc,
+ .flags = PPMU_HAS_SIER | PPMU_ARCH_207S,
+ .n_generic = ARRAY_SIZE(compat_generic_events),
+ .generic_events = compat_generic_events,
+ .cache_events = &generic_compat_cache_events,
+ .attr_groups = generic_compat_pmu_attr_groups,
+};
+
+int __init init_generic_compat_pmu(void)
+{
+ int rc = 0;
+
+ /*
+ * From ISA v2.07 on, PMU features are architected;
+ * we require >= v3.0 because (a) that has PM_LD_CMPL and
+ * PM_INST_CMPL_ALT, which v2.07 doesn't have, and
+ * (b) we don't expect any non-IBM Power ISA
+ * implementations that conform to v2.07 but not v3.0.
+ */
+ if (!cpu_has_feature(CPU_FTR_ARCH_300))
+ return -ENODEV;
+
+ rc = register_power_pmu(&generic_compat_pmu);
+ if (rc)
+ return rc;
+
+ /* Tell userspace that EBB is supported */
+ cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_EBB;
+
+ return 0;
+}