From 939991cff173f769efb8c56286d4e59fb9ced191 Mon Sep 17 00:00:00 2001 From: David Daney Date: Sat, 24 Sep 2011 02:29:55 +0200 Subject: [PATCH] MIPS: perf: Add Octeon support for hardware perf. Enable hardware counters for Octeon, and add the corresponding event mappings. Signed-off-by: David Daney Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Ingo Molnar Cc: Arnaldo Carvalho de Melo Cc: Deng-Cheng Zhu To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2790/ Signed-off-by: Ralf Baechle --- arch/mips/Kconfig | 2 +- arch/mips/kernel/perf_event_mipsxx.c | 147 +++++++++++++++++++++++++++ 2 files changed, 148 insertions(+), 1 deletion(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 90877154f298..a92648438240 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2101,7 +2101,7 @@ config NODES_SHIFT config HW_PERF_EVENTS bool "Enable hardware performance counter support for perf events" - depends on PERF_EVENTS && !MIPS_MT_SMTC && OPROFILE=n && (CPU_MIPS32 || CPU_MIPS64 || CPU_R10000 || CPU_SB1) + depends on PERF_EVENTS && !MIPS_MT_SMTC && OPROFILE=n && (CPU_MIPS32 || CPU_MIPS64 || CPU_R10000 || CPU_SB1 || CPU_CAVIUM_OCTEON) default y help Enable hardware performance counter support for perf events. If diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c index 0c9549480c42..4f2971bcf8e5 100644 --- a/arch/mips/kernel/perf_event_mipsxx.c +++ b/arch/mips/kernel/perf_event_mipsxx.c @@ -841,6 +841,16 @@ static const struct mips_perf_event mipsxx74Kcore_event_map [PERF_COUNT_HW_BUS_CYCLES] = { UNSUPPORTED_PERF_EVENT_ID }, }; +static const struct mips_perf_event octeon_event_map[PERF_COUNT_HW_MAX] = { + [PERF_COUNT_HW_CPU_CYCLES] = { 0x01, CNTR_ALL }, + [PERF_COUNT_HW_INSTRUCTIONS] = { 0x03, CNTR_ALL }, + [PERF_COUNT_HW_CACHE_REFERENCES] = { 0x2b, CNTR_ALL }, + [PERF_COUNT_HW_CACHE_MISSES] = { 0x2e, CNTR_ALL }, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { 0x08, CNTR_ALL }, + [PERF_COUNT_HW_BRANCH_MISSES] = { 0x09, CNTR_ALL }, + [PERF_COUNT_HW_BUS_CYCLES] = { 0x25, CNTR_ALL }, +}; + /* 24K/34K/1004K cores can share the same cache event map. */ static const struct mips_perf_event mipsxxcore_cache_map [PERF_COUNT_HW_CACHE_MAX] @@ -1074,6 +1084,102 @@ static const struct mips_perf_event mipsxx74Kcore_cache_map }, }; + +static const struct mips_perf_event octeon_cache_map + [PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX] = { +[C(L1D)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = { 0x2b, CNTR_ALL }, + [C(RESULT_MISS)] = { 0x2e, CNTR_ALL }, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = { 0x30, CNTR_ALL }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, +}, +[C(L1I)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = { 0x18, CNTR_ALL }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = { 0x19, CNTR_ALL }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, +}, +[C(LL)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, +}, +[C(DTLB)] = { + /* + * Only general DTLB misses are counted use the same event for + * read and write. + */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { 0x35, CNTR_ALL }, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { 0x35, CNTR_ALL }, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, +}, +[C(ITLB)] = { + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { 0x37, CNTR_ALL }, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, +}, +[C(BPU)] = { + /* Using the same code for *HW_BRANCH* */ + [C(OP_READ)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, + [C(OP_WRITE)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, + [C(OP_PREFETCH)] = { + [C(RESULT_ACCESS)] = { UNSUPPORTED_PERF_EVENT_ID }, + [C(RESULT_MISS)] = { UNSUPPORTED_PERF_EVENT_ID }, + }, +}, +}; + #ifdef CONFIG_MIPS_MT_SMP static void check_and_calc_range(struct perf_event *event, const struct mips_perf_event *pev) @@ -1411,6 +1517,39 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config) return &raw_event; } +static const struct mips_perf_event *octeon_pmu_map_raw_event(u64 config) +{ + unsigned int raw_id = config & 0xff; + unsigned int base_id = raw_id & 0x7f; + + + raw_event.cntr_mask = CNTR_ALL; + raw_event.event_id = base_id; + + if (current_cpu_type() == CPU_CAVIUM_OCTEON2) { + if (base_id > 0x42) + return ERR_PTR(-EOPNOTSUPP); + } else { + if (base_id > 0x3a) + return ERR_PTR(-EOPNOTSUPP); + } + + switch (base_id) { + case 0x00: + case 0x0f: + case 0x1e: + case 0x1f: + case 0x2f: + case 0x34: + case 0x3b ... 0x3f: + return ERR_PTR(-EOPNOTSUPP); + default: + break; + } + + return &raw_event; +} + static int __init init_hw_perf_events(void) { @@ -1470,6 +1609,14 @@ init_hw_perf_events(void) mipspmu.general_event_map = &mipsxxcore_event_map; mipspmu.cache_event_map = &mipsxxcore_cache_map; break; + case CPU_CAVIUM_OCTEON: + case CPU_CAVIUM_OCTEON_PLUS: + case CPU_CAVIUM_OCTEON2: + mipspmu.name = "octeon"; + mipspmu.general_event_map = &octeon_event_map; + mipspmu.cache_event_map = &octeon_cache_map; + mipspmu.map_raw_event = octeon_pmu_map_raw_event; + break; default: pr_cont("Either hardware does not support performance " "counters, or not yet implemented.\n"); -- 2.34.1