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linux-stable/arch/csky/kernel/perf_event.c
Guo Ren 0d3b051adb csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO 
It could help to reduce the latency of the time-related functions
in user space.

We have referenced arm's and riscv's implementation for the patch.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Vincent Chen <vincent.chen@sifive.com>
Cc: Arnd Bergmann <arnd@arndb.de>
2021-02-27 16:35:09 +08:00

1371 lines
29 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/perf_event.h>
#include <linux/platform_device.h>
#define CSKY_PMU_MAX_EVENTS 32
#define DEFAULT_COUNT_WIDTH 48
#define HPCR "<0, 0x0>" /* PMU Control reg */
#define HPSPR "<0, 0x1>" /* Start PC reg */
#define HPEPR "<0, 0x2>" /* End PC reg */
#define HPSIR "<0, 0x3>" /* Soft Counter reg */
#define HPCNTENR "<0, 0x4>" /* Count Enable reg */
#define HPINTENR "<0, 0x5>" /* Interrupt Enable reg */
#define HPOFSR "<0, 0x6>" /* Interrupt Status reg */
/* The events for a given PMU register set. */
struct pmu_hw_events {
/*
* The events that are active on the PMU for the given index.
*/
struct perf_event *events[CSKY_PMU_MAX_EVENTS];
/*
* A 1 bit for an index indicates that the counter is being used for
* an event. A 0 means that the counter can be used.
*/
unsigned long used_mask[BITS_TO_LONGS(CSKY_PMU_MAX_EVENTS)];
};
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);
static struct csky_pmu_t {
struct pmu pmu;
struct pmu_hw_events __percpu *hw_events;
struct platform_device *plat_device;
uint32_t count_width;
uint32_t hpcr;
u64 max_period;
} csky_pmu;
static int csky_pmu_irq;
#define to_csky_pmu(p) (container_of(p, struct csky_pmu, 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 */
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)] = {
#ifdef CONFIG_CPU_CK810
[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)] = 0x5,
[C(RESULT_MISS)] = 0x6,
},
#else
[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)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
#endif
},
[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)] = {
#ifdef CONFIG_CPU_CK810
[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)] = 0x7,
[C(RESULT_MISS)] = 0x8,
},
#else
[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)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
#endif
},
[C(DTLB)] = {
#ifdef CONFIG_CPU_CK810
[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,
},
#else
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = 0x14,
[C(RESULT_MISS)] = 0xb,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = 0x16,
[C(RESULT_MISS)] = 0xb,
},
#endif
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
},
[C(ITLB)] = {
#ifdef CONFIG_CPU_CK810
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
[C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
},
#else
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = 0x3,
[C(RESULT_MISS)] = 0xa,
},
#endif
[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,
},
},
};
int csky_pmu_event_set_period(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
s64 left = local64_read(&hwc->period_left);
s64 period = hwc->sample_period;
int ret = 0;
if (unlikely(left <= -period)) {
left = period;
local64_set(&hwc->period_left, left);
hwc->last_period = period;
ret = 1;
}
if (unlikely(left <= 0)) {
left += period;
local64_set(&hwc->period_left, left);
hwc->last_period = period;
ret = 1;
}
if (left > (s64)csky_pmu.max_period)
left = csky_pmu.max_period;
/*
* The hw event starts counting from this event offset,
* mark it to be able to extract future "deltas":
*/
local64_set(&hwc->prev_count, (u64)(-left));
if (hw_raw_write_mapping[hwc->idx] != NULL)
hw_raw_write_mapping[hwc->idx]((u64)(-left) &
csky_pmu.max_period);
cpwcr(HPOFSR, ~BIT(hwc->idx) & cprcr(HPOFSR));
perf_event_update_userpage(event);
return ret;
}
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);
/*
* Sign extend count value to 64bit, otherwise delta calculation
* would be incorrect when overflow occurs.
*/
uint64_t new_raw_count = sign_extend64(
hw_raw_read_mapping[hwc->idx](), csky_pmu.count_width - 1);
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_reset(void *info)
{
cpwcr(HPCR, BIT(31) | BIT(30) | BIT(1));
}
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;
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;
break;
case PERF_TYPE_HW_CACHE:
ret = csky_pmu_cache_event(event->attr.config);
if (ret == CACHE_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
break;
case PERF_TYPE_RAW:
if (hw_raw_read_mapping[event->attr.config] == NULL)
return -ENOENT;
hwc->idx = event->attr.config;
break;
default:
return -ENOENT;
}
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);
return 0;
}
/* 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)
{
unsigned long flg;
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;
csky_pmu_event_set_period(event);
local_irq_save(flg);
cpwcr(HPINTENR, BIT(idx) | cprcr(HPINTENR));
cpwcr(HPCNTENR, BIT(idx) | cprcr(HPCNTENR));
local_irq_restore(flg);
}
static void csky_pmu_stop_event(struct perf_event *event)
{
unsigned long flg;
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
local_irq_save(flg);
cpwcr(HPINTENR, ~BIT(idx) & cprcr(HPINTENR));
cpwcr(HPCNTENR, ~BIT(idx) & cprcr(HPCNTENR));
local_irq_restore(flg);
}
static void csky_pmu_stop(struct perf_event *event, int flags)
{
if (!(event->hw.state & PERF_HES_STOPPED)) {
csky_pmu_stop_event(event);
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)
{
struct pmu_hw_events *hw_events = this_cpu_ptr(csky_pmu.hw_events);
struct hw_perf_event *hwc = &event->hw;
csky_pmu_stop(event, PERF_EF_UPDATE);
hw_events->events[hwc->idx] = NULL;
perf_event_update_userpage(event);
}
/* allocate hardware counter and optionally start counting */
static int csky_pmu_add(struct perf_event *event, int flags)
{
struct pmu_hw_events *hw_events = this_cpu_ptr(csky_pmu.hw_events);
struct hw_perf_event *hwc = &event->hw;
hw_events->events[hwc->idx] = event;
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;
}
static irqreturn_t csky_pmu_handle_irq(int irq_num, void *dev)
{
struct perf_sample_data data;
struct pmu_hw_events *cpuc = this_cpu_ptr(csky_pmu.hw_events);
struct pt_regs *regs;
int idx;
/*
* Did an overflow occur?
*/
if (!cprcr(HPOFSR))
return IRQ_NONE;
/*
* Handle the counter(s) overflow(s)
*/
regs = get_irq_regs();
csky_pmu_disable(&csky_pmu.pmu);
for (idx = 0; idx < CSKY_PMU_MAX_EVENTS; ++idx) {
struct perf_event *event = cpuc->events[idx];
struct hw_perf_event *hwc;
/* Ignore if we don't have an event. */
if (!event)
continue;
/*
* We have a single interrupt for all counters. Check that
* each counter has overflowed before we process it.
*/
if (!(cprcr(HPOFSR) & BIT(idx)))
continue;
hwc = &event->hw;
csky_perf_event_update(event, &event->hw);
perf_sample_data_init(&data, 0, hwc->last_period);
csky_pmu_event_set_period(event);
if (perf_event_overflow(event, &data, regs))
csky_pmu_stop_event(event);
}
csky_pmu_enable(&csky_pmu.pmu);
/*
* Handle the pending perf events.
*
* Note: this call *must* be run with interrupts disabled. For
* platforms that can have the PMU interrupts raised as an NMI, this
* will not work.
*/
irq_work_run();
return IRQ_HANDLED;
}
static int csky_pmu_request_irq(irq_handler_t handler)
{
int err, irqs;
struct platform_device *pmu_device = csky_pmu.plat_device;
if (!pmu_device)
return -ENODEV;
irqs = min(pmu_device->num_resources, num_possible_cpus());
if (irqs < 1) {
pr_err("no irqs for PMUs defined\n");
return -ENODEV;
}
csky_pmu_irq = platform_get_irq(pmu_device, 0);
if (csky_pmu_irq < 0)
return -ENODEV;
err = request_percpu_irq(csky_pmu_irq, handler, "csky-pmu",
this_cpu_ptr(csky_pmu.hw_events));
if (err) {
pr_err("unable to request IRQ%d for CSKY PMU counters\n",
csky_pmu_irq);
return err;
}
return 0;
}
static void csky_pmu_free_irq(void)
{
int irq;
struct platform_device *pmu_device = csky_pmu.plat_device;
irq = platform_get_irq(pmu_device, 0);
if (irq >= 0)
free_percpu_irq(irq, this_cpu_ptr(csky_pmu.hw_events));
}
int init_hw_perf_events(void)
{
csky_pmu.hw_events = alloc_percpu_gfp(struct pmu_hw_events,
GFP_KERNEL);
if (!csky_pmu.hw_events) {
pr_info("failed to allocate per-cpu PMU data.\n");
return -ENOMEM;
}
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;
return 0;
}
static int csky_pmu_starting_cpu(unsigned int cpu)
{
enable_percpu_irq(csky_pmu_irq, 0);
return 0;
}
static int csky_pmu_dying_cpu(unsigned int cpu)
{
disable_percpu_irq(csky_pmu_irq);
return 0;
}
int csky_pmu_device_probe(struct platform_device *pdev,
const struct of_device_id *of_table)
{
struct device_node *node = pdev->dev.of_node;
int ret;
ret = init_hw_perf_events();
if (ret) {
pr_notice("[perf] failed to probe PMU!\n");
return ret;
}
if (of_property_read_u32(node, "count-width",
&csky_pmu.count_width)) {
csky_pmu.count_width = DEFAULT_COUNT_WIDTH;
}
csky_pmu.max_period = BIT_ULL(csky_pmu.count_width) - 1;
csky_pmu.plat_device = pdev;
/* Ensure the PMU has sane values out of reset. */
on_each_cpu(csky_pmu_reset, &csky_pmu, 1);
ret = csky_pmu_request_irq(csky_pmu_handle_irq);
if (ret) {
csky_pmu.pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
pr_notice("[perf] PMU request irq fail!\n");
}
ret = cpuhp_setup_state(CPUHP_AP_PERF_CSKY_ONLINE, "AP_PERF_ONLINE",
csky_pmu_starting_cpu,
csky_pmu_dying_cpu);
if (ret) {
csky_pmu_free_irq();
free_percpu(csky_pmu.hw_events);
return ret;
}
ret = perf_pmu_register(&csky_pmu.pmu, "cpu", PERF_TYPE_RAW);
if (ret) {
csky_pmu_free_irq();
free_percpu(csky_pmu.hw_events);
}
return ret;
}
static const struct of_device_id csky_pmu_of_device_ids[] = {
{.compatible = "csky,csky-pmu"},
{},
};
static int csky_pmu_dev_probe(struct platform_device *pdev)
{
return csky_pmu_device_probe(pdev, csky_pmu_of_device_ids);
}
static struct platform_driver csky_pmu_driver = {
.driver = {
.name = "csky-pmu",
.of_match_table = csky_pmu_of_device_ids,
},
.probe = csky_pmu_dev_probe,
};
static int __init csky_pmu_probe(void)
{
int ret;
ret = platform_driver_register(&csky_pmu_driver);
if (ret)
pr_notice("[perf] PMU initialization failed\n");
else
pr_notice("[perf] PMU initialization done\n");
return ret;
}
device_initcall(csky_pmu_probe);
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