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Subject[PATCH] csky: Add perf support for C-SKY
Date
From: Guo Ren <ren_guo@c-sky.com>

This adds basic perf support for all C-SKY CPUs. Hardware events are
only supported by 807/810/860.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
---
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 6e81477..7689b54 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
@@ -151,6 +152,19 @@ config CPU_CK860
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 0000000..ea81931
--- /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 3c0e2d1..484e6d3 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 0000000..376c972
--- /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 <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 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);
--
2.7.4
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