| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/perf_event.h> |
| #include <linux/types.h> |
| |
| #include "../perf_event.h" |
| |
| /* |
| * Not sure about some of these |
| */ |
| static const u64 p6_perfmon_event_map[] = |
| { |
| [PERF_COUNT_HW_CPU_CYCLES] = 0x0079, /* CPU_CLK_UNHALTED */ |
| [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0, /* INST_RETIRED */ |
| [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0f2e, /* L2_RQSTS:M:E:S:I */ |
| [PERF_COUNT_HW_CACHE_MISSES] = 0x012e, /* L2_RQSTS:I */ |
| [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4, /* BR_INST_RETIRED */ |
| [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5, /* BR_MISS_PRED_RETIRED */ |
| [PERF_COUNT_HW_BUS_CYCLES] = 0x0062, /* BUS_DRDY_CLOCKS */ |
| [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 0x00a2, /* RESOURCE_STALLS */ |
| |
| }; |
| |
| static const u64 __initconst p6_hw_cache_event_ids |
| [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) ] = 0x0043, /* DATA_MEM_REFS */ |
| [ C(RESULT_MISS) ] = 0x0045, /* DCU_LINES_IN */ |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = 0x0f29, /* L2_LD:M:E:S:I */ |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = 0, |
| }, |
| }, |
| [ C(L1I ) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = 0x0080, /* IFU_IFETCH */ |
| [ C(RESULT_MISS) ] = 0x0f28, /* L2_IFETCH:M:E:S:I */ |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ 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) ] = 0, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = 0x0025, /* L2_M_LINES_INM */ |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = 0, |
| }, |
| }, |
| [ C(DTLB) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = 0x0043, /* DATA_MEM_REFS */ |
| [ C(RESULT_MISS) ] = 0, |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = 0, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = 0, |
| [ C(RESULT_MISS) ] = 0, |
| }, |
| }, |
| [ C(ITLB) ] = { |
| [ C(OP_READ) ] = { |
| [ C(RESULT_ACCESS) ] = 0x0080, /* IFU_IFETCH */ |
| [ C(RESULT_MISS) ] = 0x0085, /* 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) ] = 0x00c4, /* BR_INST_RETIRED */ |
| [ C(RESULT_MISS) ] = 0x00c5, /* BR_MISS_PRED_RETIRED */ |
| }, |
| [ C(OP_WRITE) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| [ C(OP_PREFETCH) ] = { |
| [ C(RESULT_ACCESS) ] = -1, |
| [ C(RESULT_MISS) ] = -1, |
| }, |
| }, |
| }; |
| |
| static u64 p6_pmu_event_map(int hw_event) |
| { |
| return p6_perfmon_event_map[hw_event]; |
| } |
| |
| /* |
| * Event setting that is specified not to count anything. |
| * We use this to effectively disable a counter. |
| * |
| * L2_RQSTS with 0 MESI unit mask. |
| */ |
| #define P6_NOP_EVENT 0x0000002EULL |
| |
| static struct event_constraint p6_event_constraints[] = |
| { |
| INTEL_EVENT_CONSTRAINT(0xc1, 0x1), /* FLOPS */ |
| INTEL_EVENT_CONSTRAINT(0x10, 0x1), /* FP_COMP_OPS_EXE */ |
| INTEL_EVENT_CONSTRAINT(0x11, 0x2), /* FP_ASSIST */ |
| INTEL_EVENT_CONSTRAINT(0x12, 0x2), /* MUL */ |
| INTEL_EVENT_CONSTRAINT(0x13, 0x2), /* DIV */ |
| INTEL_EVENT_CONSTRAINT(0x14, 0x1), /* CYCLES_DIV_BUSY */ |
| EVENT_CONSTRAINT_END |
| }; |
| |
| static void p6_pmu_disable_all(void) |
| { |
| u64 val; |
| |
| /* p6 only has one enable register */ |
| rdmsrl(MSR_P6_EVNTSEL0, val); |
| val &= ~ARCH_PERFMON_EVENTSEL_ENABLE; |
| wrmsrl(MSR_P6_EVNTSEL0, val); |
| } |
| |
| static void p6_pmu_enable_all(int added) |
| { |
| unsigned long val; |
| |
| /* p6 only has one enable register */ |
| rdmsrl(MSR_P6_EVNTSEL0, val); |
| val |= ARCH_PERFMON_EVENTSEL_ENABLE; |
| wrmsrl(MSR_P6_EVNTSEL0, val); |
| } |
| |
| static inline void |
| p6_pmu_disable_event(struct perf_event *event) |
| { |
| struct hw_perf_event *hwc = &event->hw; |
| u64 val = P6_NOP_EVENT; |
| |
| (void)wrmsrl_safe(hwc->config_base, val); |
| } |
| |
| static void p6_pmu_enable_event(struct perf_event *event) |
| { |
| struct hw_perf_event *hwc = &event->hw; |
| u64 val; |
| |
| val = hwc->config; |
| |
| /* |
| * p6 only has a global event enable, set on PerfEvtSel0 |
| * We "disable" events by programming P6_NOP_EVENT |
| * and we rely on p6_pmu_enable_all() being called |
| * to actually enable the events. |
| */ |
| |
| (void)wrmsrl_safe(hwc->config_base, val); |
| } |
| |
| PMU_FORMAT_ATTR(event, "config:0-7" ); |
| PMU_FORMAT_ATTR(umask, "config:8-15" ); |
| PMU_FORMAT_ATTR(edge, "config:18" ); |
| PMU_FORMAT_ATTR(pc, "config:19" ); |
| PMU_FORMAT_ATTR(inv, "config:23" ); |
| PMU_FORMAT_ATTR(cmask, "config:24-31" ); |
| |
| static struct attribute *intel_p6_formats_attr[] = { |
| &format_attr_event.attr, |
| &format_attr_umask.attr, |
| &format_attr_edge.attr, |
| &format_attr_pc.attr, |
| &format_attr_inv.attr, |
| &format_attr_cmask.attr, |
| NULL, |
| }; |
| |
| static __initconst const struct x86_pmu p6_pmu = { |
| .name = "p6", |
| .handle_irq = x86_pmu_handle_irq, |
| .disable_all = p6_pmu_disable_all, |
| .enable_all = p6_pmu_enable_all, |
| .enable = p6_pmu_enable_event, |
| .disable = p6_pmu_disable_event, |
| .hw_config = x86_pmu_hw_config, |
| .schedule_events = x86_schedule_events, |
| .eventsel = MSR_P6_EVNTSEL0, |
| .perfctr = MSR_P6_PERFCTR0, |
| .event_map = p6_pmu_event_map, |
| .max_events = ARRAY_SIZE(p6_perfmon_event_map), |
| .apic = 1, |
| .max_period = (1ULL << 31) - 1, |
| .version = 0, |
| .num_counters = 2, |
| /* |
| * Events have 40 bits implemented. However they are designed such |
| * that bits [32-39] are sign extensions of bit 31. As such the |
| * effective width of a event for P6-like PMU is 32 bits only. |
| * |
| * See IA-32 Intel Architecture Software developer manual Vol 3B |
| */ |
| .cntval_bits = 32, |
| .cntval_mask = (1ULL << 32) - 1, |
| .get_event_constraints = x86_get_event_constraints, |
| .event_constraints = p6_event_constraints, |
| |
| .format_attrs = intel_p6_formats_attr, |
| .events_sysfs_show = intel_event_sysfs_show, |
| |
| }; |
| |
| static __init void p6_pmu_rdpmc_quirk(void) |
| { |
| if (boot_cpu_data.x86_mask < 9) { |
| /* |
| * PPro erratum 26; fixed in stepping 9 and above. |
| */ |
| pr_warn("Userspace RDPMC support disabled due to a CPU erratum\n"); |
| x86_pmu.attr_rdpmc_broken = 1; |
| x86_pmu.attr_rdpmc = 0; |
| } |
| } |
| |
| __init int p6_pmu_init(void) |
| { |
| x86_pmu = p6_pmu; |
| |
| switch (boot_cpu_data.x86_model) { |
| case 1: /* Pentium Pro */ |
| x86_add_quirk(p6_pmu_rdpmc_quirk); |
| break; |
| |
| case 3: /* Pentium II - Klamath */ |
| case 5: /* Pentium II - Deschutes */ |
| case 6: /* Pentium II - Mendocino */ |
| break; |
| |
| case 7: /* Pentium III - Katmai */ |
| case 8: /* Pentium III - Coppermine */ |
| case 10: /* Pentium III Xeon */ |
| case 11: /* Pentium III - Tualatin */ |
| break; |
| |
| case 9: /* Pentium M - Banias */ |
| case 13: /* Pentium M - Dothan */ |
| break; |
| |
| default: |
| pr_cont("unsupported p6 CPU model %d ", boot_cpu_data.x86_model); |
| return -ENODEV; |
| } |
| |
| memcpy(hw_cache_event_ids, p6_hw_cache_event_ids, |
| sizeof(hw_cache_event_ids)); |
| |
| return 0; |
| } |
