diff options
| -rw-r--r-- | drivers/perf/arm_cspmu/arm_cspmu.c | 121 | ||||
| -rw-r--r-- | drivers/perf/arm_cspmu/arm_cspmu.h | 25 | ||||
| -rw-r--r-- | drivers/perf/arm_cspmu/nvidia_cspmu.c | 2 |
3 files changed, 114 insertions, 34 deletions
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c index a83810c554eb..60005f89892d 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.c +++ b/drivers/perf/arm_cspmu/arm_cspmu.c @@ -78,13 +78,13 @@ static struct acpi_apmt_node *arm_cspmu_apmt_node(struct device *dev) } /* - * In CoreSight PMU architecture, all of the MMIO registers are 32-bit except - * counter register. The counter register can be implemented as 32-bit or 64-bit - * register depending on the value of PMCFGR.SIZE field. For 64-bit access, - * single-copy 64-bit atomic support is implementation defined. APMT node flag - * is used to identify if the PMU supports 64-bit single copy atomic. If 64-bit - * single copy atomic is not supported, the driver treats the register as a pair - * of 32-bit register. + * With FEAT_CSPMU_EXT32, all of the MMIO registers are 32-bit except the + * counter registers, which are either 32-bit or 64-bit depending on the value + * of PMCFGR.SIZE. It is implementation-defined whether single-copy-atomic + * 64-bit accesses are supported, so we rely on a firmware flag to identify + * that, and otherwise treat a 64-bit counter as a non-atomic pair of 32-bit + * registers. With FEAT_CSPMU_EXT64, everything is 64-bit, but we may still + * have to deal with atomicity being broken. */ /* @@ -173,13 +173,30 @@ arm_cspmu_event_attr_is_visible(struct kobject *kobj, eattr = container_of(attr, typeof(*eattr), attr.attr); /* Hide cycle event if not supported */ - if (!supports_cycle_counter(cspmu) && + if ((cspmu->has_ext64 || !supports_cycle_counter(cspmu)) && eattr->id == ARM_CSPMU_EVT_CYCLES_DEFAULT) return 0; return attr->mode; } +ssize_t arm_cspmu_default_format_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct perf_pmu_events_attr *fmt = container_of(attr, typeof(*fmt), attr); + struct arm_cspmu *cspmu = to_arm_cspmu(dev_get_drvdata(dev)); + u64 field = cspmu->has_ext64 ? U64_MAX : U32_MAX; + DECLARE_BITMAP(bits, 64) = { BITMAP_FROM_U64(field) }; + + if (!fmt->id) { + set_bit(32, bits); /* For 32-bit "cycles" event */ + return sysfs_emit(buf, "config:%*pbl\n", 64, bits); + } + + return sysfs_emit(buf, "config%lld:%*pbl\n", fmt->id, 64, bits); +} +EXPORT_SYMBOL_GPL(arm_cspmu_default_format_show); + static struct attribute *arm_cspmu_format_attrs[] = { ARM_CSPMU_FORMAT_EVENT_ATTR, ARM_CSPMU_FORMAT_FILTER_ATTR, @@ -198,9 +215,9 @@ arm_cspmu_get_format_attrs(const struct arm_cspmu *cspmu) return attrs; } -static u32 arm_cspmu_event_type(const struct perf_event *event) +static u64 arm_cspmu_event_type(const struct perf_event *event) { - return event->attr.config & ARM_CSPMU_EVENT_MASK; + return event->attr.config; } static bool arm_cspmu_is_cycle_counter_event(const struct perf_event *event) @@ -208,6 +225,16 @@ static bool arm_cspmu_is_cycle_counter_event(const struct perf_event *event) return (event->attr.config == ARM_CSPMU_EVT_CYCLES_DEFAULT); } +static u64 arm_cspmu_filter(const struct perf_event *event) +{ + return event->attr.config1; +} + +static u64 arm_cspmu_filter2(const struct perf_event *event) +{ + return event->attr.config2; +} + static ssize_t arm_cspmu_identifier_show(struct device *dev, struct device_attribute *attr, char *page) @@ -417,6 +444,17 @@ static int arm_cspmu_init_impl_ops(struct arm_cspmu *cspmu) DEFAULT_IMPL_OP(event_attr_is_visible), }; + /* + * With 64-bit events, since our default "cycles" encoding won't work, + * and the architecture recommends against implementing it anyway, we + * choose to effectively ignore FEAT_CSPMU_CCNTR, unless a vendor + * module really wants to provide its own encoding and ops. + */ + if (cspmu->has_ext64) { + cspmu->impl.ops.is_cycle_counter_event = NULL; + cspmu->impl.ops.set_cc_filter = NULL; + } + /* Firmware may override implementer/product ID from PMIIDR */ if (apmt_node && apmt_node->impl_id) cspmu->impl.pmiidr = apmt_node->impl_id; @@ -518,19 +556,24 @@ static int arm_cspmu_alloc_attr_groups(struct arm_cspmu *cspmu) return 0; } +static inline int arm_cspmu_pmcr(struct arm_cspmu *cspmu) +{ + return cspmu->has_ext64 ? PMCR_64 : PMCR; +} + static inline void arm_cspmu_reset_counters(struct arm_cspmu *cspmu) { - writel(PMCR_C | PMCR_P, cspmu->base0 + PMCR); + writel(PMCR_C | PMCR_P, cspmu->base0 + arm_cspmu_pmcr(cspmu)); } static inline void arm_cspmu_start_counters(struct arm_cspmu *cspmu) { - writel(PMCR_E, cspmu->base0 + PMCR); + writel(PMCR_E, cspmu->base0 + arm_cspmu_pmcr(cspmu)); } static inline void arm_cspmu_stop_counters(struct arm_cspmu *cspmu) { - writel(0, cspmu->base0 + PMCR); + writel(0, cspmu->base0 + arm_cspmu_pmcr(cspmu)); } static void arm_cspmu_enable(struct pmu *pmu) @@ -561,7 +604,8 @@ static int arm_cspmu_get_event_idx(struct arm_cspmu_hw_events *hw_events, struct arm_cspmu *cspmu = to_arm_cspmu(event->pmu); if (supports_cycle_counter(cspmu)) { - if (cspmu->impl.ops.is_cycle_counter_event(event)) { + if (cspmu->impl.ops.is_cycle_counter_event && + cspmu->impl.ops.is_cycle_counter_event(event)) { /* Search for available cycle counter. */ if (test_and_set_bit(cspmu->cycle_counter_logical_idx, hw_events->used_ctrs)) @@ -804,26 +848,33 @@ static void arm_cspmu_event_update(struct perf_event *event) static inline void arm_cspmu_set_event(struct arm_cspmu *cspmu, struct hw_perf_event *hwc) { - u32 offset = PMEVTYPER + (4 * hwc->idx); - - writel(hwc->config, cspmu->base0 + offset); + if (cspmu->has_ext64) + writeq(hwc->config, cspmu->base0 + PMEVTYPER + (8 * hwc->idx)); + else + writel(hwc->config, cspmu->base0 + PMEVTYPER + (4 * hwc->idx)); } static void arm_cspmu_set_ev_filter(struct arm_cspmu *cspmu, const struct perf_event *event) { - u32 filter = event->attr.config1 & ARM_CSPMU_FILTER_MASK; - u32 filter2 = event->attr.config2 & ARM_CSPMU_FILTER_MASK; - u32 offset = 4 * event->hw.idx; + u64 filter = arm_cspmu_filter(event); + u64 filter2 = arm_cspmu_filter2(event); + int n = event->hw.idx; - writel(filter, cspmu->base0 + PMEVFILTR + offset); - writel(filter2, cspmu->base0 + PMEVFILT2R + offset); + if (cspmu->has_ext64) { + writeq(filter, cspmu->base0 + PMEVFILTR + (8 * n)); + writeq(filter2, cspmu->base0 + PMEVFILT2R + (8 * n)); + } else { + writel(filter, cspmu->base0 + PMEVFILTR + (4 * n)); + writel(filter2, cspmu->base0 + PMEVFILT2R + (4 * n)); + } } +/* Note we deliberately don't expect 64-bit filters here; see init_impl_ops */ static void arm_cspmu_set_cc_filter(struct arm_cspmu *cspmu, const struct perf_event *event) { - u32 filter = event->attr.config1 & ARM_CSPMU_FILTER_MASK; + u32 filter = arm_cspmu_filter(event); writel(filter, cspmu->base0 + PMCCFILTR); } @@ -976,6 +1027,30 @@ static int arm_cspmu_init_mmio(struct arm_cspmu *cspmu) } } + /* + * We can infer FEAT_CSPMU_EXT64 from PMCNTEN, or hope that anything + * that failed to get that right has at least implemented the optional + * PMDEVARCH correctly... + * + * Note that architecturally, has_ext64 *should* imply has_atomic_dword, + * but enough implementations have ignored that already that we'll just + * have to still rely on the firmware flag. + */ + writel(~0U, cspmu->base0 + PMCNTENCLR); + writel(~0U, cspmu->base0 + PMCNTEN); + if (readl(cspmu->base0 + PMCNTENCLR)) { + cspmu->has_ext64 = true; + writel(0, cspmu->base0 + PMCNTEN); + } else { + u32 reg = readl(cspmu->base0 + PMDEVARCH); + + if (reg & ARM_CSPMU_PMDEVARCH_PRESENT) { + reg &= ARM_CSPMU_PMDEVARCH_ARCHPART; + if (reg == 0xaf4 || reg == 0xaf5) + cspmu->has_ext64 = true; + } + } + cspmu->pmcfgr = readl(cspmu->base0 + PMCFGR); cspmu->num_logical_ctrs = FIELD_GET(PMCFGR_N, cspmu->pmcfgr) + 1; diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/arm_cspmu.h index 3fc5c8d77266..c4058d602477 100644 --- a/drivers/perf/arm_cspmu/arm_cspmu.h +++ b/drivers/perf/arm_cspmu/arm_cspmu.h @@ -35,21 +35,15 @@ PMU_EVENT_ATTR_ID(_name, arm_cspmu_sysfs_event_show, _config) -/* Default event id mask */ -#define ARM_CSPMU_EVENT_MASK GENMASK_ULL(63, 0) - -/* Default filter value mask */ -#define ARM_CSPMU_FILTER_MASK GENMASK_ULL(63, 0) - /* Default event format */ #define ARM_CSPMU_FORMAT_EVENT_ATTR \ - ARM_CSPMU_FORMAT_ATTR(event, "config:0-32") + PMU_EVENT_ATTR_ID(event, arm_cspmu_default_format_show, 0) /* Default filter format */ #define ARM_CSPMU_FORMAT_FILTER_ATTR \ - ARM_CSPMU_FORMAT_ATTR(filter, "config1:0-31") + PMU_EVENT_ATTR_ID(filter, arm_cspmu_default_format_show, 1) #define ARM_CSPMU_FORMAT_FILTER2_ATTR \ - ARM_CSPMU_FORMAT_ATTR(filter2, "config2:0-31") + PMU_EVENT_ATTR_ID(filter2, arm_cspmu_default_format_show, 2) /* * This is the default event number for cycle count, if supported, since the @@ -78,6 +72,7 @@ #define PMEVFILT2R 0x800 #define PMEVFILTR 0xA00 #define PMCNTENSET 0xC00 +#define PMCNTEN 0xC10 #define PMCNTENCLR 0xC20 #define PMINTENSET 0xC40 #define PMINTENCLR 0xC60 @@ -87,6 +82,8 @@ #define PMCFGR 0xE00 #define PMCR 0xE04 #define PMIIDR 0xE08 +#define PMCR_64 0xE10 +#define PMDEVARCH 0xFBC #define PMPIDR0 0xFE0 #define PMPIDR1 0xFE4 #define PMPIDR2 0xFE8 @@ -154,6 +151,10 @@ #define ARM_CSPMU_IMPL_ID_NVIDIA 0x36B #define ARM_CSPMU_IMPL_ID_AMPERE 0xA16 +/* PMDEVARCH */ +#define ARM_CSPMU_PMDEVARCH_PRESENT BIT(20) +#define ARM_CSPMU_PMDEVARCH_ARCHPART GENMASK(11, 0) + struct arm_cspmu; /* This tracks the events assigned to each counter in the PMU. */ @@ -183,7 +184,7 @@ struct arm_cspmu_impl_ops { /* Check if the event corresponds to cycle count event */ bool (*is_cycle_counter_event)(const struct perf_event *event); /* Decode event type/id from configs */ - u32 (*event_type)(const struct perf_event *event); + u64 (*event_type)(const struct perf_event *event); /* Set/reset event filters */ void (*set_cc_filter)(struct arm_cspmu *cspmu, const struct perf_event *event); @@ -234,6 +235,7 @@ struct arm_cspmu { int irq; bool has_atomic_dword; + bool has_ext64; u32 pmcfgr; u32 num_logical_ctrs; u32 num_set_clr_reg; @@ -250,6 +252,9 @@ ssize_t arm_cspmu_sysfs_event_show(struct device *dev, struct device_attribute *attr, char *buf); +ssize_t arm_cspmu_default_format_show(struct device *dev, + struct device_attribute *attr, char *buf); + /* Register vendor backend. */ int arm_cspmu_impl_register(const struct arm_cspmu_impl_match *impl_match); diff --git a/drivers/perf/arm_cspmu/nvidia_cspmu.c b/drivers/perf/arm_cspmu/nvidia_cspmu.c index bac83e424d6d..a4c1ab886709 100644 --- a/drivers/perf/arm_cspmu/nvidia_cspmu.c +++ b/drivers/perf/arm_cspmu/nvidia_cspmu.c @@ -762,7 +762,7 @@ static void pcie_tgt_pmu_reset_ev_filter(struct arm_cspmu *cspmu, pcie_tgt_pmu_config_addr_filter(cspmu, false, base, mask, idx); } -static u32 pcie_tgt_pmu_event_type(const struct perf_event *event) +static u64 pcie_tgt_pmu_event_type(const struct perf_event *event) { return event->attr.config & NV_PCIE_TGT_EV_TYPE_MASK; } |