/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2018 SiFive * Copyright (C) 2018 Andes Technology Corporation * Copyright (C) 2021 Western Digital Corporation or its affiliates. * */ #ifndef _ASM_RISCV_PERF_EVENT_H #define _ASM_RISCV_PERF_EVENT_H #include <linux/perf_event.h> #include <linux/ptrace.h> #include <linux/interrupt.h> #ifdef CONFIG_RISCV_PMU /* * The RISCV_MAX_COUNTERS parameter should be specified. */ #define RISCV_MAX_COUNTERS 64 #define RISCV_OP_UNSUPP (-EOPNOTSUPP) #define RISCV_PMU_PDEV_NAME "riscv-pmu" #define RISCV_PMU_LEGACY_PDEV_NAME "riscv-pmu-legacy" #define RISCV_PMU_STOP_FLAG_RESET 1 #define RISCV_PMU_CONFIG1_GUEST_EVENTS 0x1 struct cpu_hw_events { /* currently enabled events */ int n_events; /* Counter overflow interrupt */ int irq; /* currently enabled events */ struct perf_event *events[RISCV_MAX_COUNTERS]; /* currently enabled hardware counters */ DECLARE_BITMAP(used_hw_ctrs, RISCV_MAX_COUNTERS); /* currently enabled firmware counters */ DECLARE_BITMAP(used_fw_ctrs, RISCV_MAX_COUNTERS); }; struct riscv_pmu { struct pmu pmu; char *name; irqreturn_t (*handle_irq)(int irq_num, void *dev); unsigned long cmask; u64 (*ctr_read)(struct perf_event *event); int (*ctr_get_idx)(struct perf_event *event); int (*ctr_get_width)(int idx); void (*ctr_clear_idx)(struct perf_event *event); void (*ctr_start)(struct perf_event *event, u64 init_val); void (*ctr_stop)(struct perf_event *event, unsigned long flag); int (*event_map)(struct perf_event *event, u64 *config); struct cpu_hw_events __percpu *hw_events; struct hlist_node node; struct notifier_block riscv_pm_nb; }; #define to_riscv_pmu(p) (container_of(p, struct riscv_pmu, pmu)) void riscv_pmu_start(struct perf_event *event, int flags); void riscv_pmu_stop(struct perf_event *event, int flags); unsigned long riscv_pmu_ctr_read_csr(unsigned long csr); int riscv_pmu_event_set_period(struct perf_event *event); uint64_t riscv_pmu_ctr_get_width_mask(struct perf_event *event); u64 riscv_pmu_event_update(struct perf_event *event); #ifdef CONFIG_RISCV_PMU_LEGACY void riscv_pmu_legacy_skip_init(void); #else static inline void riscv_pmu_legacy_skip_init(void) {}; #endif struct riscv_pmu *riscv_pmu_alloc(void); #ifdef CONFIG_RISCV_PMU_SBI int riscv_pmu_get_hpm_info(u32 *hw_ctr_width, u32 *num_hw_ctr); #endif #endif /* CONFIG_RISCV_PMU */ #endif /* _ASM_RISCV_PERF_EVENT_H */