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authorDavid S. Miller <davem@davemloft.net>2009-09-26 20:42:10 -0700
committerDavid S. Miller <davem@davemloft.net>2009-09-26 20:42:10 -0700
commit2ce4da2efcaca0dcbfed7a1f24177f18e75e0e89 (patch)
tree1fe33c39e4ae903340a9a5cc604ffade10bb9e85 /arch/sparc
parent0d9df2515dbceb67d343c0f10fd3ff218380d524 (diff)
sparc: Support HW cache events.
First supported chip for HW cache events is Ultra-IIIi. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/perf_event.c145
1 files changed, 139 insertions, 6 deletions
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 2d6a1b10c81..48375f69467 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -68,8 +68,19 @@ struct perf_event_map {
#define PIC_LOWER 0x02
};
+#define C(x) PERF_COUNT_HW_CACHE_##x
+
+#define CACHE_OP_UNSUPPORTED 0xfffe
+#define CACHE_OP_NONSENSE 0xffff
+
+typedef struct perf_event_map cache_map_t
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX];
+
struct sparc_pmu {
const struct perf_event_map *(*event_map)(int);
+ const cache_map_t *cache_map;
int max_events;
int upper_shift;
int lower_shift;
@@ -92,8 +103,96 @@ static const struct perf_event_map *ultra3i_event_map(int event_id)
return &ultra3i_perfmon_event_map[event_id];
}
+static const cache_map_t ultra3i_cache_map = {
+[C(L1D)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = { 0x09, PIC_LOWER, },
+ [C(RESULT_MISS)] = { 0x09, PIC_UPPER, },
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = { 0x0a, PIC_LOWER },
+ [C(RESULT_MISS)] = { 0x0a, PIC_UPPER },
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED },
+ [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED },
+ },
+},
+[C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = { 0x09, PIC_LOWER, },
+ [C(RESULT_MISS)] = { 0x09, PIC_UPPER, },
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = { CACHE_OP_NONSENSE },
+ [ C(RESULT_MISS) ] = { CACHE_OP_NONSENSE },
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = { CACHE_OP_UNSUPPORTED },
+ [ C(RESULT_MISS) ] = { CACHE_OP_UNSUPPORTED },
+ },
+},
+[C(LL)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = { 0x0c, PIC_LOWER, },
+ [C(RESULT_MISS)] = { 0x0c, PIC_UPPER, },
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = { 0x0c, PIC_LOWER },
+ [C(RESULT_MISS)] = { 0x0c, PIC_UPPER },
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED },
+ [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED },
+ },
+},
+[C(DTLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED },
+ [C(RESULT_MISS)] = { 0x12, PIC_UPPER, },
+ },
+ [ 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)] = { CACHE_OP_UNSUPPORTED },
+ [C(RESULT_MISS)] = { 0x11, PIC_UPPER, },
+ },
+ [ 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 },
+ },
+},
+};
+
static const struct sparc_pmu ultra3i_pmu = {
.event_map = ultra3i_event_map,
+ .cache_map = &ultra3i_cache_map,
.max_events = ARRAY_SIZE(ultra3i_perfmon_event_map),
.upper_shift = 11,
.lower_shift = 4,
@@ -375,6 +474,37 @@ void perf_event_release_pmc(void)
}
}
+static const struct perf_event_map *sparc_map_cache_event(u64 config)
+{
+ unsigned int cache_type, cache_op, cache_result;
+ const struct perf_event_map *pmap;
+
+ if (!sparc_pmu->cache_map)
+ return ERR_PTR(-ENOENT);
+
+ cache_type = (config >> 0) & 0xff;
+ if (cache_type >= PERF_COUNT_HW_CACHE_MAX)
+ return ERR_PTR(-EINVAL);
+
+ cache_op = (config >> 8) & 0xff;
+ if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX)
+ return ERR_PTR(-EINVAL);
+
+ cache_result = (config >> 16) & 0xff;
+ if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
+ return ERR_PTR(-EINVAL);
+
+ pmap = &((*sparc_pmu->cache_map)[cache_type][cache_op][cache_result]);
+
+ if (pmap->encoding == CACHE_OP_UNSUPPORTED)
+ return ERR_PTR(-ENOENT);
+
+ if (pmap->encoding == CACHE_OP_NONSENSE)
+ return ERR_PTR(-EINVAL);
+
+ return pmap;
+}
+
static void hw_perf_event_destroy(struct perf_event *event)
{
perf_event_release_pmc();
@@ -390,12 +520,17 @@ static int __hw_perf_event_init(struct perf_event *event)
if (atomic_read(&nmi_active) < 0)
return -ENODEV;
- if (attr->type != PERF_TYPE_HARDWARE)
+ if (attr->type == PERF_TYPE_HARDWARE) {
+ if (attr->config >= sparc_pmu->max_events)
+ return -EINVAL;
+ pmap = sparc_pmu->event_map(attr->config);
+ } else if (attr->type == PERF_TYPE_HW_CACHE) {
+ pmap = sparc_map_cache_event(attr->config);
+ if (IS_ERR(pmap))
+ return PTR_ERR(pmap);
+ } else
return -EOPNOTSUPP;
- if (attr->config >= sparc_pmu->max_events)
- return -EINVAL;
-
perf_event_grab_pmc();
event->destroy = hw_perf_event_destroy;
@@ -417,8 +552,6 @@ static int __hw_perf_event_init(struct perf_event *event)
atomic64_set(&hwc->period_left, hwc->sample_period);
}
- pmap = sparc_pmu->event_map(attr->config);
-
enc = pmap->encoding;
if (pmap->pic_mask & PIC_UPPER) {
hwc->idx = PIC_UPPER_INDEX;