Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
arch/sparc/kernel/perf_event.c | 189 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 187 insertions(+), 2 deletions(-)
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 6441592..1885370 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -53,8 +53,8 @@
* normal code.
*/
-#define MAX_HWEVENTS 2
-#define MAX_PCRS 1
+#define MAX_HWEVENTS 4
+#define MAX_PCRS 4
#define MAX_PERIOD ((1UL << 32) - 1)
#define PIC_UPPER_INDEX 0
@@ -597,6 +597,187 @@ static const struct sparc_pmu niagara2_pmu = {
.num_pic_regs = 1,
};
+static const struct perf_event_map niagara4_perfmon_event_map[] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = { (26 << 6) },
+ [PERF_COUNT_HW_INSTRUCTIONS] = { (3 << 6) | 0x3f },
+ [PERF_COUNT_HW_CACHE_REFERENCES] = { (3 << 6) | 0x04 },
+ [PERF_COUNT_HW_CACHE_MISSES] = { (16 << 6) | 0x07 },
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = { (4 << 6) | 0x01 },
+ [PERF_COUNT_HW_BRANCH_MISSES] = { (25 << 6) | 0x0f },
+};
+
+static const struct perf_event_map *niagara4_event_map(int event_id)
+{
+ return &niagara4_perfmon_event_map[event_id];
+}
+
+static const cache_map_t niagara4_cache_map = {
+[C(L1D)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = { (3 << 6) | 0x04 },
+ [C(RESULT_MISS)] = { (16 << 6) | 0x07 },
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = { (3 << 6) | 0x08 },
+ [C(RESULT_MISS)] = { (16 << 6) | 0x07 },
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = { CACHE_OP_UNSUPPORTED },
+ [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED },
+ },
+},
+[C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = { (3 << 6) | 0x3f },
+ [C(RESULT_MISS)] = { (11 << 6) | 0x03 },
+ },
+ [ 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)] = { (3 << 6) | 0x04 },
+ [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED },
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = { (3 << 6) | 0x08 },
+ [C(RESULT_MISS)] = { CACHE_OP_UNSUPPORTED },
+ },
+ [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)] = { (17 << 6) | 0x3f },
+ },
+ [ 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)] = { (6 << 6) | 0x3f },
+ },
+ [ 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 u32 sparc_vt_read_pmc(int idx)
+{
+ u64 val = pcr_ops->read_pic(idx);
+
+ return val & 0xffffffff;
+}
+
+static void sparc_vt_write_pmc(int idx, u64 val)
+{
+ u64 pcr;
+
+ /* There seems to be an internal latch on the overflow event
+ * on SPARC-T4 that prevents it from triggering unless you
+ * update the PIC exactly as we do here. The requirement
+ * seems to be that you have to turn off event counting in the
+ * PCR around the PIC update.
+ *
+ * For example, after the following sequence:
+ *
+ * 1) set PIC to -1
+ * 2) enable event counting and overflow reporting in PCR
+ * 3) overflow triggers, softint 15 handler invoked
+ * 4) clear OV bit in PCR
+ * 5) write PIC to -1
+ *
+ * a subsequent overflow event will not trigger. This
+ * sequence works on SPARC-T3 and previous chips.
+ */
+ pcr = pcr_ops->read_pcr(idx);
+ pcr_ops->write_pcr(idx, PCR_N4_PICNPT);
+
+ pcr_ops->write_pic(idx, val & 0xffffffff);
+
+ pcr_ops->write_pcr(idx, pcr);
+}
+
+static const struct sparc_pmu niagara4_pmu = {
+ .event_map = niagara4_event_map,
+ .cache_map = &niagara4_cache_map,
+ .max_events = ARRAY_SIZE(niagara4_perfmon_event_map),
+ .read_pmc = sparc_vt_read_pmc,
+ .write_pmc = sparc_vt_write_pmc,
+ .upper_shift = 5,
+ .lower_shift = 5,
+ .event_mask = 0x7ff,
+ .user_bit = PCR_N4_UTRACE,
+ .priv_bit = PCR_N4_STRACE,
+
+ /* We explicitly don't support hypervisor tracing. The T4
+ * generates the overflow event for precise events via a trap
+ * which will not be generated (ie. it's completely lost) if
+ * we happen to be in the hypervisor when the event triggers.
+ * Essentially, the overflow event reporting is completely
+ * unusable when you have hypervisor mode tracing enabled.
+ */
+ .hv_bit = 0,
+
+ .irq_bit = PCR_N4_TOE,
+ .upper_nop = 0,
+ .lower_nop = 0,
+ .flags = 0,
+ .max_hw_events = 4,
+ .num_pcrs = 4,
+ .num_pic_regs = 4,
+};
+
static const struct sparc_pmu *sparc_pmu __read_mostly;
static u64 event_encoding(u64 event_id, int idx)
@@ -1465,6 +1646,10 @@ static bool __init supported_pmu(void)
sparc_pmu = &niagara2_pmu;
return true;
}
+ if (!strcmp(sparc_pmu_type, "niagara4")) {
+ sparc_pmu = &niagara4_pmu;
+ return true;
+ }
return false;
}
--
1.7.10.4
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