[tip:branch?] perf_counter: powerpc: Implement generalized cache events for POWER processors

tip-bot for Paul Mackerras
2009-06-11T10:10:36Z

Commit-ID: 905de321d7499be1b5d1ae135ea390604a52d32d
Gitweb: http://git.kernel.org/tip/905de321d7499be1b5d1ae135ea390604a52d32d
Author: Paul Mackerras <paulus@samba.org>
AuthorDate: Thu, 11 Jun 2009 14:55:42 +1000
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 11 Jun 2009 12:07:37 +0200

perf_counter: powerpc: Implement generalized cache events for POWER processors

This adds tables of event codes for the generalized cache events for
all the currently supported powerpc processors: POWER{4,5,5+,6,7} and
PPC970*, plus powerpc-specific code to use these tables when a
generalized cache event is requested.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <18992.36430.933526.742969@drongo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
arch/powerpc/include/asm/perf_counter.h | 3 ++
arch/powerpc/kernel/perf_counter.c | 42 +++++++++++++++++++++++++++-
arch/powerpc/kernel/power4-pmu.c | 41 +++++++++++++++++++++++++++
arch/powerpc/kernel/power5+-pmu.c | 45 +++++++++++++++++++++++++++++-
arch/powerpc/kernel/power5-pmu.c | 41 +++++++++++++++++++++++++++
arch/powerpc/kernel/power6-pmu.c | 46 +++++++++++++++++++++++++++++-
arch/powerpc/kernel/power7-pmu.c | 41 +++++++++++++++++++++++++++
arch/powerpc/kernel/ppc970-pmu.c | 41 +++++++++++++++++++++++++++
8 files changed, 294 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/include/asm/perf_counter.h b/arch/powerpc/include/asm/perf_counter.h
index 1c60f0c..cc7c887 100644
--- a/arch/powerpc/include/asm/perf_counter.h
+++ b/arch/powerpc/include/asm/perf_counter.h
@@ -33,6 +33,9 @@ struct power_pmu {
u32 flags;
int n_generic;
int *generic_events;
+ int (*cache_events)[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX];
};

extern struct power_pmu *ppmu;
diff --git a/arch/powerpc/kernel/perf_counter.c b/arch/powerpc/kernel/perf_counter.c
index 5d12e68..bb20238 100644
--- a/arch/powerpc/kernel/perf_counter.c
+++ b/arch/powerpc/kernel/perf_counter.c
@@ -856,6 +856,36 @@ static void hw_perf_counter_destroy(struct perf_counter *counter)
}
}

+/*
+ * Translate a generic cache event config to a raw event code.
+ */
+static int hw_perf_cache_event(u64 config, u64 *eventp)
+{
+ unsigned long type, op, result;
+ int ev;
+
+ if (!ppmu->cache_events)
+ return -EINVAL;
+
+ /* unpack config */
+ type = config & 0xff;
+ op = (config >> 8) & 0xff;
+ result = (config >> 16) & 0xff;
+
+ if (type >= PERF_COUNT_HW_CACHE_MAX ||
+ op >= PERF_COUNT_HW_CACHE_OP_MAX ||
+ result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
+ return -EINVAL;
+
+ ev = (*ppmu->cache_events)[type][op][result];
+ if (ev == 0)
+ return -EOPNOTSUPP;
+ if (ev == -1)
+ return -EINVAL;
+ *eventp = ev;
+ return 0;
+}
+
const struct pmu *hw_perf_counter_init(struct perf_counter *counter)
{
u64 ev;
@@ -868,13 +898,21 @@ const struct pmu *hw_perf_counter_init(struct perf_counter *counter)

if (!ppmu)
return ERR_PTR(-ENXIO);
- if (counter->attr.type != PERF_TYPE_RAW) {
+ switch (counter->attr.type) {
+ case PERF_TYPE_HARDWARE:
ev = counter->attr.config;
if (ev >= ppmu->n_generic || ppmu->generic_events[ev] == 0)
return ERR_PTR(-EOPNOTSUPP);
ev = ppmu->generic_events[ev];
- } else {
+ break;
+ case PERF_TYPE_HW_CACHE:
+ err = hw_perf_cache_event(counter->attr.config, &ev);
+ if (err)
+ return ERR_PTR(err);
+ break;
+ case PERF_TYPE_RAW:
ev = counter->attr.config;
+ break;
}
counter->hw.config_base = ev;
counter->hw.idx = 0;
diff --git a/arch/powerpc/kernel/power4-pmu.c b/arch/powerpc/kernel/power4-pmu.c
index 836fa11..0e94b68 100644
--- a/arch/powerpc/kernel/power4-pmu.c
+++ b/arch/powerpc/kernel/power4-pmu.c
@@ -543,6 +543,46 @@ static int p4_generic_events[] = {
[PERF_COUNT_BRANCH_MISSES] = 0x331, /* PM_BR_MPRED_CR */
};

+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int power4_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x8c10, 0x3c10 },
+ [C(OP_WRITE)] = { 0x7c10, 0xc13 },
+ [C(OP_PREFETCH)] = { 0xc35, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(L2)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { 0, 0 },
+ [C(OP_PREFETCH)] = { 0xc34, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x904 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x900 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x330, 0x331 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
struct power_pmu power4_pmu = {
.n_counter = 8,
.max_alternatives = 5,
@@ -554,4 +594,5 @@ struct power_pmu power4_pmu = {
.disable_pmc = p4_disable_pmc,
.n_generic = ARRAY_SIZE(p4_generic_events),
.generic_events = p4_generic_events,
+ .cache_events = &power4_cache_events,
};
diff --git a/arch/powerpc/kernel/power5+-pmu.c b/arch/powerpc/kernel/power5+-pmu.c
index 8471e3c..bbf2cbb 100644
--- a/arch/powerpc/kernel/power5+-pmu.c
+++ b/arch/powerpc/kernel/power5+-pmu.c
@@ -614,6 +614,46 @@ static int power5p_generic_events[] = {
[PERF_COUNT_BRANCH_MISSES] = 0x230e5, /* BR_MPRED_CR */
};

+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int power5p_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x1c10a8, 0x3c1088 },
+ [C(OP_WRITE)] = { 0x2c10a8, 0xc10c3 },
+ [C(OP_PREFETCH)] = { 0xc70e7, -1 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(L2)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { 0, 0 },
+ [C(OP_PREFETCH)] = { 0xc50c3, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0xc20e4, 0x800c4 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x800c0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x230e4, 0x230e5 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
struct power_pmu power5p_pmu = {
.n_counter = 6,
.max_alternatives = MAX_ALT,
@@ -623,8 +663,9 @@ struct power_pmu power5p_pmu = {
.get_constraint = power5p_get_constraint,
.get_alternatives = power5p_get_alternatives,
.disable_pmc = power5p_disable_pmc,
+ .limited_pmc_event = power5p_limited_pmc_event,
+ .flags = PPMU_LIMITED_PMC5_6,
.n_generic = ARRAY_SIZE(power5p_generic_events),
.generic_events = power5p_generic_events,
- .flags = PPMU_LIMITED_PMC5_6,
- .limited_pmc_event = power5p_limited_pmc_event,
+ .cache_events = &power5p_cache_events,
};
diff --git a/arch/powerpc/kernel/power5-pmu.c b/arch/powerpc/kernel/power5-pmu.c
index 1b44c5f..670cf10 100644
--- a/arch/powerpc/kernel/power5-pmu.c
+++ b/arch/powerpc/kernel/power5-pmu.c
@@ -556,6 +556,46 @@ static int power5_generic_events[] = {
[PERF_COUNT_BRANCH_MISSES] = 0x230e5, /* BR_MPRED_CR */
};

+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int power5_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x4c1090, 0x3c1088 },
+ [C(OP_WRITE)] = { 0x3c1090, 0xc10c3 },
+ [C(OP_PREFETCH)] = { 0xc70e7, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(L2)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x3c309b },
+ [C(OP_WRITE)] = { 0, 0 },
+ [C(OP_PREFETCH)] = { 0xc50c3, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x2c4090, 0x800c4 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x800c0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x230e4, 0x230e5 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
struct power_pmu power5_pmu = {
.n_counter = 6,
.max_alternatives = MAX_ALT,
@@ -567,4 +607,5 @@ struct power_pmu power5_pmu = {
.disable_pmc = power5_disable_pmc,
.n_generic = ARRAY_SIZE(power5_generic_events),
.generic_events = power5_generic_events,
+ .cache_events = &power5_cache_events,
};
diff --git a/arch/powerpc/kernel/power6-pmu.c b/arch/powerpc/kernel/power6-pmu.c
index cd4fbe0..4da7078 100644
--- a/arch/powerpc/kernel/power6-pmu.c
+++ b/arch/powerpc/kernel/power6-pmu.c
@@ -474,6 +474,47 @@ static int power6_generic_events[] = {
[PERF_COUNT_BRANCH_MISSES] = 0x400052, /* BR_MPRED */
};

+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ * The "DTLB" and "ITLB" events relate to the DERAT and IERAT.
+ */
+static int power6_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x80082, 0x80080 },
+ [C(OP_WRITE)] = { 0x80086, 0x80088 },
+ [C(OP_PREFETCH)] = { 0x810a4, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x100056 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0x4008c, 0 },
+ },
+ [C(L2)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x150730, 0x250532 },
+ [C(OP_WRITE)] = { 0x250432, 0x150432 },
+ [C(OP_PREFETCH)] = { 0x810a6, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x20000e },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x420ce },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x430e6, 0x400052 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
struct power_pmu power6_pmu = {
.n_counter = 6,
.max_alternatives = MAX_ALT,
@@ -483,8 +524,9 @@ struct power_pmu power6_pmu = {
.get_constraint = p6_get_constraint,
.get_alternatives = p6_get_alternatives,
.disable_pmc = p6_disable_pmc,
+ .limited_pmc_event = p6_limited_pmc_event,
+ .flags = PPMU_LIMITED_PMC5_6 | PPMU_ALT_SIPR,
.n_generic = ARRAY_SIZE(power6_generic_events),
.generic_events = power6_generic_events,
- .flags = PPMU_LIMITED_PMC5_6 | PPMU_ALT_SIPR,
- .limited_pmc_event = p6_limited_pmc_event,
+ .cache_events = &power6_cache_events,
};
diff --git a/arch/powerpc/kernel/power7-pmu.c b/arch/powerpc/kernel/power7-pmu.c
index dfac48d..060e0de 100644
--- a/arch/powerpc/kernel/power7-pmu.c
+++ b/arch/powerpc/kernel/power7-pmu.c
@@ -302,6 +302,46 @@ static int power7_generic_events[] = {
[PERF_COUNT_BRANCH_MISSES] = 0x400f6, /* BR_MPRED */
};

+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int power7_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x400f0, 0xc880 },
+ [C(OP_WRITE)] = { 0, 0x300f0 },
+ [C(OP_PREFETCH)] = { 0xd8b8, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x200fc },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0x408a, 0 },
+ },
+ [C(L2)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x6080, 0x6084 },
+ [C(OP_WRITE)] = { 0x6082, 0x6086 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x300fc },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x400fc },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x10068, 0x400f6 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
struct power_pmu power7_pmu = {
.n_counter = 6,
.max_alternatives = MAX_ALT + 1,
@@ -313,4 +353,5 @@ struct power_pmu power7_pmu = {
.disable_pmc = power7_disable_pmc,
.n_generic = ARRAY_SIZE(power7_generic_events),
.generic_events = power7_generic_events,
+ .cache_events = &power7_cache_events,
};
diff --git a/arch/powerpc/kernel/ppc970-pmu.c b/arch/powerpc/kernel/ppc970-pmu.c
index eed47c4..336adf1 100644
--- a/arch/powerpc/kernel/ppc970-pmu.c
+++ b/arch/powerpc/kernel/ppc970-pmu.c
@@ -427,6 +427,46 @@ static int ppc970_generic_events[] = {
[PERF_COUNT_BRANCH_MISSES] = 0x327, /* PM_GRP_BR_MPRED */
};

+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+/*
+ * Table of generalized cache-related events.
+ * 0 means not supported, -1 means nonsensical, other values
+ * are event codes.
+ */
+static int ppc970_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
+ [C(L1D)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x8810, 0x3810 },
+ [C(OP_WRITE)] = { 0x7810, 0x813 },
+ [C(OP_PREFETCH)] = { 0x731, 0 },
+ },
+ [C(L1I)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { 0, 0 },
+ },
+ [C(L2)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0 },
+ [C(OP_WRITE)] = { 0, 0 },
+ [C(OP_PREFETCH)] = { 0x733, 0 },
+ },
+ [C(DTLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x704 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(ITLB)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0, 0x700 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+ [C(BPU)] = { /* RESULT_ACCESS RESULT_MISS */
+ [C(OP_READ)] = { 0x431, 0x327 },
+ [C(OP_WRITE)] = { -1, -1 },
+ [C(OP_PREFETCH)] = { -1, -1 },
+ },
+};
+
struct power_pmu ppc970_pmu = {
.n_counter = 8,
.max_alternatives = 2,
@@ -438,4 +478,5 @@ struct power_pmu ppc970_pmu = {
.disable_pmc = p970_disable_pmc,
.n_generic = ARRAY_SIZE(ppc970_generic_events),
.generic_events = ppc970_generic_events,
+ .cache_events = &ppc970_cache_events,
};