MIPS/Perf-events: Don't do validation on raw events

MIPS licensees may want to modify performance counters to count extra
events. Also, now that the user is working on raw events, the manual is
being used for sure. And feeding unsupported events shouldn't cause
hardware failure and the like.

[ralf@linux-mips.org: performance events also being used in internal
performance evaluation and have a tendency to change as the micro-
architecture evolves, even for minor revisions that may not be
distinguishable by PrID.  It's not very practicable to maintain a list
of all events and there is no real benefit.]

Signed-off-by: Deng-Cheng Zhu <dczhu@mips.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: David Daney <david.daney@cavium.com>
Cc: Eyal Barzilay <eyal@mips.com>
Cc: Zenon Fortuna <zenon@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/3107/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
index 4f2971bcf8e5464577885b5ecc64db11c388d295..ab4c761cfedc71050082f843ff6256d7e785cefa 100644 (file)
--- a/arch/mips/kernel/perf_event_mipsxx.c
+++ b/arch/mips/kernel/perf_event_mipsxx.c
@@ -1380,20 +1380,10 @@ static irqreturn_t mipsxx_pmu_handle_irq(int irq, void *dev)
 }
 
 /* 24K */
-#define IS_UNSUPPORTED_24K_EVENT(r, b)                                 \
-       ((b) == 12 || (r) == 151 || (r) == 152 || (b) == 26 ||          \
-        (b) == 27 || (r) == 28 || (r) == 158 || (b) == 31 ||           \
-        (b) == 32 || (b) == 34 || (b) == 36 || (r) == 168 ||           \
-        (r) == 172 || (b) == 47 || ((b) >= 56 && (b) <= 63) ||         \
-        ((b) >= 68 && (b) <= 127))
 #define IS_BOTH_COUNTERS_24K_EVENT(b)                                  \
        ((b) == 0 || (b) == 1 || (b) == 11)
 
 /* 34K */
-#define IS_UNSUPPORTED_34K_EVENT(r, b)                                 \
-       ((b) == 12 || (r) == 27 || (r) == 158 || (b) == 36 ||           \
-        (b) == 38 || (r) == 175 || ((b) >= 56 && (b) <= 63) ||         \
-        ((b) >= 68 && (b) <= 127))
 #define IS_BOTH_COUNTERS_34K_EVENT(b)                                  \
        ((b) == 0 || (b) == 1 || (b) == 11)
 #ifdef CONFIG_MIPS_MT_SMP
@@ -1406,20 +1396,10 @@ static irqreturn_t mipsxx_pmu_handle_irq(int irq, void *dev)
 #endif
 
 /* 74K */
-#define IS_UNSUPPORTED_74K_EVENT(r, b)                                 \
-       ((r) == 5 || ((r) >= 135 && (r) <= 137) ||                      \
-        ((b) >= 10 && (b) <= 12) || (b) == 22 || (b) == 27 ||          \
-        (b) == 33 || (b) == 34 || ((b) >= 47 && (b) <= 49) ||          \
-        (r) == 178 || (b) == 55 || (b) == 57 || (b) == 60 ||           \
-        (b) == 61 || (r) == 62 || (r) == 191 ||                        \
-        ((b) >= 64 && (b) <= 127))
 #define IS_BOTH_COUNTERS_74K_EVENT(b)                                  \
        ((b) == 0 || (b) == 1)
 
 /* 1004K */
-#define IS_UNSUPPORTED_1004K_EVENT(r, b)                               \
-       ((b) == 12 || (r) == 27 || (r) == 158 || (b) == 38 ||           \
-        (r) == 175 || (b) == 63 || ((b) >= 68 && (b) <= 127))
 #define IS_BOTH_COUNTERS_1004K_EVENT(b)                                        \
        ((b) == 0 || (b) == 1 || (b) == 11)
 #ifdef CONFIG_MIPS_MT_SMP
@@ -1445,11 +1425,10 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
        unsigned int raw_id = config & 0xff;
        unsigned int base_id = raw_id & 0x7f;
 
+       raw_event.event_id = base_id;
+
        switch (current_cpu_type()) {
        case CPU_24K:
-               if (IS_UNSUPPORTED_24K_EVENT(raw_id, base_id))
-                       return ERR_PTR(-EOPNOTSUPP);
-               raw_event.event_id = base_id;
                if (IS_BOTH_COUNTERS_24K_EVENT(base_id))
                        raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
                else
@@ -1464,9 +1443,6 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
 #endif
                break;
        case CPU_34K:
-               if (IS_UNSUPPORTED_34K_EVENT(raw_id, base_id))
-                       return ERR_PTR(-EOPNOTSUPP);
-               raw_event.event_id = base_id;
                if (IS_BOTH_COUNTERS_34K_EVENT(base_id))
                        raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
                else
@@ -1482,9 +1458,6 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
 #endif
                break;
        case CPU_74K:
-               if (IS_UNSUPPORTED_74K_EVENT(raw_id, base_id))
-                       return ERR_PTR(-EOPNOTSUPP);
-               raw_event.event_id = base_id;
                if (IS_BOTH_COUNTERS_74K_EVENT(base_id))
                        raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
                else
@@ -1495,9 +1468,6 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
 #endif
                break;
        case CPU_1004K:
-               if (IS_UNSUPPORTED_1004K_EVENT(raw_id, base_id))
-                       return ERR_PTR(-EOPNOTSUPP);
-               raw_event.event_id = base_id;
                if (IS_BOTH_COUNTERS_1004K_EVENT(base_id))
                        raw_event.cntr_mask = CNTR_EVEN | CNTR_ODD;
                else