From f50fd2d8524c15b08da9e7e9d84752f0f1be7172 Mon Sep 17 00:00:00 2001 From: Guo Ren Date: Wed, 2 Jan 2019 22:09:25 +0800 Subject: [PATCH] csky: Add perf support for C-SKY This adds basic perf support for all C-SKY CPUs. Hardware events are only supported by 807/810/860. Signed-off-by: Guo Ren --- arch/csky/Kconfig | 16 +- arch/csky/include/asm/perf_event.h | 7 + arch/csky/kernel/Makefile | 1 + arch/csky/kernel/perf_event.c | 1031 ++++++++++++++++++++++++++++ 4 files changed, 1054 insertions(+), 1 deletion(-) create mode 100644 arch/csky/include/asm/perf_event.h create mode 100644 arch/csky/kernel/perf_event.c diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 6e814772d72e..7689b54d4236 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -35,6 +35,7 @@ config CSKY select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO select HAVE_KERNEL_LZMA + select HAVE_PERF_EVENTS select HAVE_C_RECORDMCOUNT select HAVE_DMA_API_DEBUG select HAVE_DMA_CONTIGUOUS @@ -43,7 +44,7 @@ config CSKY select OF select OF_EARLY_FLATTREE select OF_RESERVED_MEM - select PERF_USE_VMALLOC + select PERF_USE_VMALLOC if CPU_CK610 select RTC_LIB select TIMER_OF select USB_ARCH_HAS_EHCI @@ -150,6 +151,19 @@ config CPU_CK860 select CPU_HAS_FPUV2 endchoice +choice + prompt "C-SKY PMU type" + depends on PERF_EVENTS + depends on CPU_CK807 || CPU_CK810 || CPU_CK860 + +config CPU_PMU_NONE + bool "None" + +config CSKY_PMU_V1 + bool "Performance Monitoring Unit Ver.1" + +endchoice + choice prompt "Power Manager Instruction (wait/doze/stop)" default CPU_PM_NONE diff --git a/arch/csky/include/asm/perf_event.h b/arch/csky/include/asm/perf_event.h new file mode 100644 index 000000000000..ea8193122294 --- /dev/null +++ b/arch/csky/include/asm/perf_event.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#ifndef __ASM_CSKY_PERF_EVENT_H +#define __ASM_CSKY_PERF_EVENT_H + +#endif /* __ASM_PERF_EVENT_ELF_H */ diff --git a/arch/csky/kernel/Makefile b/arch/csky/kernel/Makefile index 3c0e2d15d4e0..484e6d3a3647 100644 --- a/arch/csky/kernel/Makefile +++ b/arch/csky/kernel/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_MODULES) += module.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o obj-$(CONFIG_STACKTRACE) += stacktrace.o +obj-$(CONFIG_CSKY_PMU_V1) += perf_event.o ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE) diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c new file mode 100644 index 000000000000..376c972f5f37 --- /dev/null +++ b/arch/csky/kernel/perf_event.c @@ -0,0 +1,1031 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. + +#include +#include +#include +#include +#include +#include + +#define CSKY_PMU_MAX_EVENTS 32 + +#define HPCR "<0, 0x0>" /* PMU Control reg */ +#define HPCNTENR "<0, 0x4>" /* Count Enable reg */ + +static uint64_t (*hw_raw_read_mapping[CSKY_PMU_MAX_EVENTS])(void); +static void (*hw_raw_write_mapping[CSKY_PMU_MAX_EVENTS])(uint64_t val); + +struct csky_pmu_t { + struct pmu pmu; + uint32_t hpcr; +} csky_pmu; + +#define cprgr(reg) \ +({ \ + unsigned int tmp; \ + asm volatile("cprgr %0, "reg"\n" \ + : "=r"(tmp) \ + : \ + : "memory"); \ + tmp; \ +}) + +#define cpwgr(reg, val) \ +({ \ + asm volatile( \ + "cpwgr %0, "reg"\n" \ + : \ + : "r"(val) \ + : "memory"); \ +}) + +#define cprcr(reg) \ +({ \ + unsigned int tmp; \ + asm volatile("cprcr %0, "reg"\n" \ + : "=r"(tmp) \ + : \ + : "memory"); \ + tmp; \ +}) + +#define cpwcr(reg, val) \ +({ \ + asm volatile( \ + "cpwcr %0, "reg"\n" \ + : \ + : "r"(val) \ + : "memory"); \ +}) + +/* cycle counter */ +static uint64_t csky_pmu_read_cc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x3>"); + lo = cprgr("<0, 0x2>"); + hi = cprgr("<0, 0x3>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_cc(uint64_t val) +{ + cpwgr("<0, 0x2>", (uint32_t) val); + cpwgr("<0, 0x3>", (uint32_t) (val >> 32)); +} + +/* instruction counter */ +static uint64_t csky_pmu_read_ic(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x5>"); + lo = cprgr("<0, 0x4>"); + hi = cprgr("<0, 0x5>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_ic(uint64_t val) +{ + cpwgr("<0, 0x4>", (uint32_t) val); + cpwgr("<0, 0x5>", (uint32_t) (val >> 32)); +} + +/* l1 icache access counter */ +static uint64_t csky_pmu_read_icac(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x7>"); + lo = cprgr("<0, 0x6>"); + hi = cprgr("<0, 0x7>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_icac(uint64_t val) +{ + cpwgr("<0, 0x6>", (uint32_t) val); + cpwgr("<0, 0x7>", (uint32_t) (val >> 32)); +} + +/* l1 icache miss counter */ +static uint64_t csky_pmu_read_icmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x9>"); + lo = cprgr("<0, 0x8>"); + hi = cprgr("<0, 0x9>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_icmc(uint64_t val) +{ + cpwgr("<0, 0x8>", (uint32_t) val); + cpwgr("<0, 0x9>", (uint32_t) (val >> 32)); +} + +/* l1 dcache access counter */ +static uint64_t csky_pmu_read_dcac(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0xb>"); + lo = cprgr("<0, 0xa>"); + hi = cprgr("<0, 0xb>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_dcac(uint64_t val) +{ + cpwgr("<0, 0xa>", (uint32_t) val); + cpwgr("<0, 0xb>", (uint32_t) (val >> 32)); +} + +/* l1 dcache miss counter */ +static uint64_t csky_pmu_read_dcmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0xd>"); + lo = cprgr("<0, 0xc>"); + hi = cprgr("<0, 0xd>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_dcmc(uint64_t val) +{ + cpwgr("<0, 0xc>", (uint32_t) val); + cpwgr("<0, 0xd>", (uint32_t) (val >> 32)); +} + +/* l2 cache access counter */ +static uint64_t csky_pmu_read_l2ac(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0xf>"); + lo = cprgr("<0, 0xe>"); + hi = cprgr("<0, 0xf>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_l2ac(uint64_t val) +{ + cpwgr("<0, 0xe>", (uint32_t) val); + cpwgr("<0, 0xf>", (uint32_t) (val >> 32)); +} + +/* l2 cache miss counter */ +static uint64_t csky_pmu_read_l2mc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x11>"); + lo = cprgr("<0, 0x10>"); + hi = cprgr("<0, 0x11>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_l2mc(uint64_t val) +{ + cpwgr("<0, 0x10>", (uint32_t) val); + cpwgr("<0, 0x11>", (uint32_t) (val >> 32)); +} + +/* I-UTLB miss counter */ +static uint64_t csky_pmu_read_iutlbmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x15>"); + lo = cprgr("<0, 0x14>"); + hi = cprgr("<0, 0x15>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_iutlbmc(uint64_t val) +{ + cpwgr("<0, 0x14>", (uint32_t) val); + cpwgr("<0, 0x15>", (uint32_t) (val >> 32)); +} + +/* D-UTLB miss counter */ +static uint64_t csky_pmu_read_dutlbmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x17>"); + lo = cprgr("<0, 0x16>"); + hi = cprgr("<0, 0x17>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_dutlbmc(uint64_t val) +{ + cpwgr("<0, 0x16>", (uint32_t) val); + cpwgr("<0, 0x17>", (uint32_t) (val >> 32)); +} + +/* JTLB miss counter */ +static uint64_t csky_pmu_read_jtlbmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x19>"); + lo = cprgr("<0, 0x18>"); + hi = cprgr("<0, 0x19>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_jtlbmc(uint64_t val) +{ + cpwgr("<0, 0x18>", (uint32_t) val); + cpwgr("<0, 0x19>", (uint32_t) (val >> 32)); +} + +/* software counter */ +static uint64_t csky_pmu_read_softc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x1b>"); + lo = cprgr("<0, 0x1a>"); + hi = cprgr("<0, 0x1b>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_softc(uint64_t val) +{ + cpwgr("<0, 0x1a>", (uint32_t) val); + cpwgr("<0, 0x1b>", (uint32_t) (val >> 32)); +} + +/* conditional branch mispredict counter */ +static uint64_t csky_pmu_read_cbmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x1d>"); + lo = cprgr("<0, 0x1c>"); + hi = cprgr("<0, 0x1d>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_cbmc(uint64_t val) +{ + cpwgr("<0, 0x1c>", (uint32_t) val); + cpwgr("<0, 0x1d>", (uint32_t) (val >> 32)); +} + +/* conditional branch instruction counter */ +static uint64_t csky_pmu_read_cbic(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x1f>"); + lo = cprgr("<0, 0x1e>"); + hi = cprgr("<0, 0x1f>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_cbic(uint64_t val) +{ + cpwgr("<0, 0x1e>", (uint32_t) val); + cpwgr("<0, 0x1f>", (uint32_t) (val >> 32)); +} + +/* indirect branch mispredict counter */ +static uint64_t csky_pmu_read_ibmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x21>"); + lo = cprgr("<0, 0x20>"); + hi = cprgr("<0, 0x21>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_ibmc(uint64_t val) +{ + cpwgr("<0, 0x20>", (uint32_t) val); + cpwgr("<0, 0x21>", (uint32_t) (val >> 32)); +} + +/* indirect branch instruction counter */ +static uint64_t csky_pmu_read_ibic(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x23>"); + lo = cprgr("<0, 0x22>"); + hi = cprgr("<0, 0x23>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_ibic(uint64_t val) +{ + cpwgr("<0, 0x22>", (uint32_t) val); + cpwgr("<0, 0x23>", (uint32_t) (val >> 32)); +} + +/* LSU spec fail counter */ +static uint64_t csky_pmu_read_lsfc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x25>"); + lo = cprgr("<0, 0x24>"); + hi = cprgr("<0, 0x25>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_lsfc(uint64_t val) +{ + cpwgr("<0, 0x24>", (uint32_t) val); + cpwgr("<0, 0x25>", (uint32_t) (val >> 32)); +} + +/* store instruction counter */ +static uint64_t csky_pmu_read_sic(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x27>"); + lo = cprgr("<0, 0x26>"); + hi = cprgr("<0, 0x27>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_sic(uint64_t val) +{ + cpwgr("<0, 0x26>", (uint32_t) val); + cpwgr("<0, 0x27>", (uint32_t) (val >> 32)); +} + +/* dcache read access counter */ +static uint64_t csky_pmu_read_dcrac(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x29>"); + lo = cprgr("<0, 0x28>"); + hi = cprgr("<0, 0x29>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_dcrac(uint64_t val) +{ + cpwgr("<0, 0x28>", (uint32_t) val); + cpwgr("<0, 0x29>", (uint32_t) (val >> 32)); +} + +/* dcache read miss counter */ +static uint64_t csky_pmu_read_dcrmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x2b>"); + lo = cprgr("<0, 0x2a>"); + hi = cprgr("<0, 0x2b>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_dcrmc(uint64_t val) +{ + cpwgr("<0, 0x2a>", (uint32_t) val); + cpwgr("<0, 0x2b>", (uint32_t) (val >> 32)); +} + +/* dcache write access counter */ +static uint64_t csky_pmu_read_dcwac(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x2d>"); + lo = cprgr("<0, 0x2c>"); + hi = cprgr("<0, 0x2d>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_dcwac(uint64_t val) +{ + cpwgr("<0, 0x2c>", (uint32_t) val); + cpwgr("<0, 0x2d>", (uint32_t) (val >> 32)); +} + +/* dcache write miss counter */ +static uint64_t csky_pmu_read_dcwmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x2f>"); + lo = cprgr("<0, 0x2e>"); + hi = cprgr("<0, 0x2f>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_dcwmc(uint64_t val) +{ + cpwgr("<0, 0x2e>", (uint32_t) val); + cpwgr("<0, 0x2f>", (uint32_t) (val >> 32)); +} + +/* l2cache read access counter */ +static uint64_t csky_pmu_read_l2rac(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x31>"); + lo = cprgr("<0, 0x30>"); + hi = cprgr("<0, 0x31>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_l2rac(uint64_t val) +{ + cpwgr("<0, 0x30>", (uint32_t) val); + cpwgr("<0, 0x31>", (uint32_t) (val >> 32)); +} + +/* l2cache read miss counter */ +static uint64_t csky_pmu_read_l2rmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x33>"); + lo = cprgr("<0, 0x32>"); + hi = cprgr("<0, 0x33>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_l2rmc(uint64_t val) +{ + cpwgr("<0, 0x32>", (uint32_t) val); + cpwgr("<0, 0x33>", (uint32_t) (val >> 32)); +} + +/* l2cache write access counter */ +static uint64_t csky_pmu_read_l2wac(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x35>"); + lo = cprgr("<0, 0x34>"); + hi = cprgr("<0, 0x35>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_l2wac(uint64_t val) +{ + cpwgr("<0, 0x34>", (uint32_t) val); + cpwgr("<0, 0x35>", (uint32_t) (val >> 32)); +} + +/* l2cache write miss counter */ +static uint64_t csky_pmu_read_l2wmc(void) +{ + uint32_t lo, hi, tmp; + uint64_t result; + + do { + tmp = cprgr("<0, 0x37>"); + lo = cprgr("<0, 0x36>"); + hi = cprgr("<0, 0x37>"); + } while (hi != tmp); + + result = (uint64_t) (hi) << 32; + result |= lo; + + return result; +} + +static void csky_pmu_write_l2wmc(uint64_t val) +{ + cpwgr("<0, 0x36>", (uint32_t) val); + cpwgr("<0, 0x37>", (uint32_t) (val >> 32)); +} + +#define HW_OP_UNSUPPORTED 0xffff +static const int csky_pmu_hw_map[PERF_COUNT_HW_MAX] = { + [PERF_COUNT_HW_CPU_CYCLES] = 0x1, + [PERF_COUNT_HW_INSTRUCTIONS] = 0x2, + [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0xf, + [PERF_COUNT_HW_BRANCH_MISSES] = 0xe, + [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED, + [PERF_COUNT_HW_REF_CPU_CYCLES] = HW_OP_UNSUPPORTED, +}; + +#define C(_x) PERF_COUNT_HW_CACHE_##_x +#define CACHE_OP_UNSUPPORTED 0xffff +static const int csky_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = { + [C(L1D)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = 0x14, + [C(RESULT_MISS)] = 0x15, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = 0x16, + [C(RESULT_MISS)] = 0x17, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = 0x5, + [C(RESULT_MISS)] = 0x6, + }, + }, + [C(L1I)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = 0x3, + [C(RESULT_MISS)] = 0x4, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(LL)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = 0x18, + [C(RESULT_MISS)] = 0x19, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = 0x1a, + [C(RESULT_MISS)] = 0x1b, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = 0x7, + [C(RESULT_MISS)] = 0x8, + }, + }, + [C(DTLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = 0x5, + [C(RESULT_MISS)] = 0xb, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(ITLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = 0x3, + [C(RESULT_MISS)] = 0xa, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(BPU)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, + [C(NODE)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, + [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, + }, + }, +}; + +static void csky_perf_event_update(struct perf_event *event, + struct hw_perf_event *hwc) +{ + uint64_t prev_raw_count = local64_read(&hwc->prev_count); + uint64_t new_raw_count = hw_raw_read_mapping[hwc->idx](); + int64_t delta = new_raw_count - prev_raw_count; + + /* + * We aren't afraid of hwc->prev_count changing beneath our feet + * because there's no way for us to re-enter this function anytime. + */ + local64_set(&hwc->prev_count, new_raw_count); + local64_add(delta, &event->count); + local64_sub(delta, &hwc->period_left); +} + +static void csky_pmu_read(struct perf_event *event) +{ + csky_perf_event_update(event, &event->hw); +} + +static int csky_pmu_cache_event(u64 config) +{ + unsigned int cache_type, cache_op, cache_result; + + cache_type = (config >> 0) & 0xff; + cache_op = (config >> 8) & 0xff; + cache_result = (config >> 16) & 0xff; + + if (cache_type >= PERF_COUNT_HW_CACHE_MAX) + return -EINVAL; + if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX) + return -EINVAL; + if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX) + return -EINVAL; + + return csky_pmu_cache_map[cache_type][cache_op][cache_result]; +} + +static int csky_pmu_event_init(struct perf_event *event) +{ + struct hw_perf_event *hwc = &event->hw; + int ret; + + if (event->attr.exclude_user) + csky_pmu.hpcr = BIT(2); + else if (event->attr.exclude_kernel) + csky_pmu.hpcr = BIT(3); + else + csky_pmu.hpcr = BIT(2) | BIT(3); + + csky_pmu.hpcr |= BIT(1) | BIT(0); + + switch (event->attr.type) { + case PERF_TYPE_HARDWARE: + if (event->attr.config >= PERF_COUNT_HW_MAX) + return -ENOENT; + ret = csky_pmu_hw_map[event->attr.config]; + if (ret == HW_OP_UNSUPPORTED) + return -ENOENT; + hwc->idx = ret; + return 0; + case PERF_TYPE_HW_CACHE: + ret = csky_pmu_cache_event(event->attr.config); + if (ret == CACHE_OP_UNSUPPORTED) + return -ENOENT; + hwc->idx = ret; + return 0; + case PERF_TYPE_RAW: + if (hw_raw_read_mapping[event->attr.config] == NULL) + return -ENOENT; + hwc->idx = event->attr.config; + return 0; + default: + return -ENOENT; + } +} + +/* starts all counters */ +static void csky_pmu_enable(struct pmu *pmu) +{ + cpwcr(HPCR, csky_pmu.hpcr); +} + +/* stops all counters */ +static void csky_pmu_disable(struct pmu *pmu) +{ + cpwcr(HPCR, BIT(1)); +} + +static void csky_pmu_start(struct perf_event *event, int flags) +{ + struct hw_perf_event *hwc = &event->hw; + int idx = hwc->idx; + + if (WARN_ON_ONCE(idx == -1)) + return; + + if (flags & PERF_EF_RELOAD) + WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE)); + + hwc->state = 0; + + cpwcr(HPCNTENR, BIT(idx) | cprcr(HPCNTENR)); +} + +static void csky_pmu_stop(struct perf_event *event, int flags) +{ + struct hw_perf_event *hwc = &event->hw; + int idx = hwc->idx; + + if (!(event->hw.state & PERF_HES_STOPPED)) { + cpwcr(HPCNTENR, ~BIT(idx) & cprcr(HPCNTENR)); + event->hw.state |= PERF_HES_STOPPED; + } + + if ((flags & PERF_EF_UPDATE) && + !(event->hw.state & PERF_HES_UPTODATE)) { + csky_perf_event_update(event, &event->hw); + event->hw.state |= PERF_HES_UPTODATE; + } +} + +static void csky_pmu_del(struct perf_event *event, int flags) +{ + csky_pmu_stop(event, PERF_EF_UPDATE); + + perf_event_update_userpage(event); +} + +/* allocate hardware counter and optionally start counting */ +static int csky_pmu_add(struct perf_event *event, int flags) +{ + struct hw_perf_event *hwc = &event->hw; + + local64_set(&hwc->prev_count, 0); + + if (hw_raw_write_mapping[hwc->idx] != NULL) + hw_raw_write_mapping[hwc->idx](0); + + hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED; + if (flags & PERF_EF_START) + csky_pmu_start(event, PERF_EF_RELOAD); + + perf_event_update_userpage(event); + + return 0; +} + +int __init init_hw_perf_events(void) +{ + csky_pmu.pmu = (struct pmu) { + .pmu_enable = csky_pmu_enable, + .pmu_disable = csky_pmu_disable, + .event_init = csky_pmu_event_init, + .add = csky_pmu_add, + .del = csky_pmu_del, + .start = csky_pmu_start, + .stop = csky_pmu_stop, + .read = csky_pmu_read, + }; + + memset((void *)hw_raw_read_mapping, 0, + sizeof(hw_raw_read_mapping[CSKY_PMU_MAX_EVENTS])); + + hw_raw_read_mapping[0x1] = csky_pmu_read_cc; + hw_raw_read_mapping[0x2] = csky_pmu_read_ic; + hw_raw_read_mapping[0x3] = csky_pmu_read_icac; + hw_raw_read_mapping[0x4] = csky_pmu_read_icmc; + hw_raw_read_mapping[0x5] = csky_pmu_read_dcac; + hw_raw_read_mapping[0x6] = csky_pmu_read_dcmc; + hw_raw_read_mapping[0x7] = csky_pmu_read_l2ac; + hw_raw_read_mapping[0x8] = csky_pmu_read_l2mc; + hw_raw_read_mapping[0xa] = csky_pmu_read_iutlbmc; + hw_raw_read_mapping[0xb] = csky_pmu_read_dutlbmc; + hw_raw_read_mapping[0xc] = csky_pmu_read_jtlbmc; + hw_raw_read_mapping[0xd] = csky_pmu_read_softc; + hw_raw_read_mapping[0xe] = csky_pmu_read_cbmc; + hw_raw_read_mapping[0xf] = csky_pmu_read_cbic; + hw_raw_read_mapping[0x10] = csky_pmu_read_ibmc; + hw_raw_read_mapping[0x11] = csky_pmu_read_ibic; + hw_raw_read_mapping[0x12] = csky_pmu_read_lsfc; + hw_raw_read_mapping[0x13] = csky_pmu_read_sic; + hw_raw_read_mapping[0x14] = csky_pmu_read_dcrac; + hw_raw_read_mapping[0x15] = csky_pmu_read_dcrmc; + hw_raw_read_mapping[0x16] = csky_pmu_read_dcwac; + hw_raw_read_mapping[0x17] = csky_pmu_read_dcwmc; + hw_raw_read_mapping[0x18] = csky_pmu_read_l2rac; + hw_raw_read_mapping[0x19] = csky_pmu_read_l2rmc; + hw_raw_read_mapping[0x1a] = csky_pmu_read_l2wac; + hw_raw_read_mapping[0x1b] = csky_pmu_read_l2wmc; + + memset((void *)hw_raw_write_mapping, 0, + sizeof(hw_raw_write_mapping[CSKY_PMU_MAX_EVENTS])); + + hw_raw_write_mapping[0x1] = csky_pmu_write_cc; + hw_raw_write_mapping[0x2] = csky_pmu_write_ic; + hw_raw_write_mapping[0x3] = csky_pmu_write_icac; + hw_raw_write_mapping[0x4] = csky_pmu_write_icmc; + hw_raw_write_mapping[0x5] = csky_pmu_write_dcac; + hw_raw_write_mapping[0x6] = csky_pmu_write_dcmc; + hw_raw_write_mapping[0x7] = csky_pmu_write_l2ac; + hw_raw_write_mapping[0x8] = csky_pmu_write_l2mc; + hw_raw_write_mapping[0xa] = csky_pmu_write_iutlbmc; + hw_raw_write_mapping[0xb] = csky_pmu_write_dutlbmc; + hw_raw_write_mapping[0xc] = csky_pmu_write_jtlbmc; + hw_raw_write_mapping[0xd] = csky_pmu_write_softc; + hw_raw_write_mapping[0xe] = csky_pmu_write_cbmc; + hw_raw_write_mapping[0xf] = csky_pmu_write_cbic; + hw_raw_write_mapping[0x10] = csky_pmu_write_ibmc; + hw_raw_write_mapping[0x11] = csky_pmu_write_ibic; + hw_raw_write_mapping[0x12] = csky_pmu_write_lsfc; + hw_raw_write_mapping[0x13] = csky_pmu_write_sic; + hw_raw_write_mapping[0x14] = csky_pmu_write_dcrac; + hw_raw_write_mapping[0x15] = csky_pmu_write_dcrmc; + hw_raw_write_mapping[0x16] = csky_pmu_write_dcwac; + hw_raw_write_mapping[0x17] = csky_pmu_write_dcwmc; + hw_raw_write_mapping[0x18] = csky_pmu_write_l2rac; + hw_raw_write_mapping[0x19] = csky_pmu_write_l2rmc; + hw_raw_write_mapping[0x1a] = csky_pmu_write_l2wac; + hw_raw_write_mapping[0x1b] = csky_pmu_write_l2wmc; + + csky_pmu.pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT; + + cpwcr(HPCR, BIT(31) | BIT(30) | BIT(1)); + + return perf_pmu_register(&csky_pmu.pmu, "cpu", PERF_TYPE_RAW); +} +arch_initcall(init_hw_perf_events); -- 2.20.1