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yaml
---
r: 273490
b: refs/heads/master
c: 939991c
h: refs/heads/master
v: v3
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David Daney authored and Ralf Baechle committed Oct 24, 2011
1 parent 9c2906d commit 8186de8
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Showing 3 changed files with 149 additions and 2 deletions.
2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: 82091564cfd7ab8def42777a9c662dbf655c5d25
refs/heads/master: 939991cff173f769efb8c56286d4e59fb9ced191
2 changes: 1 addition & 1 deletion trunk/arch/mips/Kconfig
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Expand Up @@ -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
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147 changes: 147 additions & 0 deletions trunk/arch/mips/kernel/perf_event_mipsxx.c
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Expand Up @@ -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]
Expand Down Expand Up @@ -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)
Expand Down Expand Up @@ -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)
{
Expand Down Expand Up @@ -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");
Expand Down

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