perf, x86: Add cache events for the Pentium-4 PMU

Move the HT bit setting code from p4_pmu_event_map to
p4_hw_config. So the cache events can get HT bit set correctly.

Tested on my P4 desktop, below 6 cache events work:

 L1-dcache-load-misses
 LLC-load-misses
 dTLB-load-misses
 dTLB-store-misses
 iTLB-loads
 iTLB-load-misses

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1268908392.13901.128.camel@minggr.sh.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 1cd58cd..aef562c 100644 (file)
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -357,6 +357,8 @@
 #define MSR_P4_U2L_ESCR0               0x000003b0
 #define MSR_P4_U2L_ESCR1               0x000003b1
 
+#define MSR_P4_PEBS_MATRIX_VERT                0x000003f2
+
 /* Intel Core-based CPU performance counters */
 #define MSR_CORE_PERF_FIXED_CTR0       0x00000309
 #define MSR_CORE_PERF_FIXED_CTR1       0x0000030a

diff --git a/arch/x86/include/asm/perf_event_p4.h b/arch/x86/include/asm/perf_event_p4.h
index 7d3406a..871249c 100644 (file)
--- a/arch/x86/include/asm/perf_event_p4.h
+++ b/arch/x86/include/asm/perf_event_p4.h
@@ -708,4 +708,14 @@ enum P4_EVENTS_ATTR {
        P4_MAKE_EVENT_ATTR(P4_INSTR_COMPLETED, BOGUS, 1),
 };
 
+enum {
+       KEY_P4_L1D_OP_READ_RESULT_MISS,
+       KEY_P4_LL_OP_READ_RESULT_MISS,
+       KEY_P4_DTLB_OP_READ_RESULT_MISS,
+       KEY_P4_DTLB_OP_WRITE_RESULT_MISS,
+       KEY_P4_ITLB_OP_READ_RESULT_ACCESS,
+       KEY_P4_ITLB_OP_READ_RESULT_MISS,
+       KEY_P4_UOP_TYPE,
+};
+
 #endif /* PERF_EVENT_P4_H */

diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
index 3e97ed3..b7bf991 100644 (file)
--- a/arch/x86/kernel/cpu/perf_event_p4.c
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -19,6 +19,11 @@ struct p4_event_template {
        u64 config;                     /* packed predefined bits */
        int dep;                        /* upstream dependency event index */
        int key;                        /* index into p4_templates */
+       u64 msr;                        /*
+                                        * the high 32 bits set into MSR_IA32_PEBS_ENABLE and
+                                        * the low 32 bits set into MSR_P4_PEBS_MATRIX_VERT
+                                        * for cache events
+                                        */
        unsigned int emask;             /* ESCR EventMask */
        unsigned int escr_msr[2];       /* ESCR MSR for this event */
        unsigned int cntr[2];           /* counter index (offset) */
@@ -31,6 +36,67 @@ struct p4_pmu_res {
 
 static DEFINE_PER_CPU(struct p4_pmu_res, p4_pmu_config);
 
+#define P4_CACHE_EVENT_CONFIG(event, bit) \
+       p4_config_pack_escr(P4_EVENT_UNPACK_EVENT(event) << P4_EVNTSEL_EVENT_SHIFT) | \
+       p4_config_pack_escr((event##_##bit) << P4_EVNTSEL_EVENTMASK_SHIFT) | \
+       p4_config_pack_cccr(P4_EVENT_UNPACK_SELECTOR(event) << P4_CCCR_ESCR_SELECT_SHIFT)
+
+static __initconst u64 p4_hw_cache_event_ids
+                               [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) ] = 0x0,
+                                       /* 1stL_cache_load_miss_retired */
+               [ C(RESULT_MISS)   ] = P4_CACHE_EVENT_CONFIG(P4_REPLAY_EVENT, NBOGUS)
+                                       | KEY_P4_L1D_OP_READ_RESULT_MISS,
+       },
+ },
+ [ C(LL  ) ] = {
+       [ C(OP_READ) ] = {
+               [ C(RESULT_ACCESS) ] = 0x0,
+                                       /* 2ndL_cache_load_miss_retired */
+               [ C(RESULT_MISS)   ] = P4_CACHE_EVENT_CONFIG(P4_REPLAY_EVENT, NBOGUS)
+                                       | KEY_P4_LL_OP_READ_RESULT_MISS,
+       },
+ },
+ [ C(DTLB) ] = {
+       [ C(OP_READ) ] = {
+               [ C(RESULT_ACCESS) ] = 0x0,
+                                       /* DTLB_load_miss_retired */
+               [ C(RESULT_MISS)   ] = P4_CACHE_EVENT_CONFIG(P4_REPLAY_EVENT, NBOGUS)
+                                       | KEY_P4_DTLB_OP_READ_RESULT_MISS,
+       },
+       [ C(OP_WRITE) ] = {
+               [ C(RESULT_ACCESS) ] = 0x0,
+                                       /* DTLB_store_miss_retired */
+               [ C(RESULT_MISS)   ] = P4_CACHE_EVENT_CONFIG(P4_REPLAY_EVENT, NBOGUS)
+                                       | KEY_P4_DTLB_OP_WRITE_RESULT_MISS,
+       },
+ },
+ [ C(ITLB) ] = {
+       [ C(OP_READ) ] = {
+                                       /* ITLB_reference.HIT */
+               [ C(RESULT_ACCESS) ] = P4_CACHE_EVENT_CONFIG(P4_ITLB_REFERENCE, HIT)
+                                       | KEY_P4_ITLB_OP_READ_RESULT_ACCESS,
+
+                                       /* ITLB_reference.MISS */
+               [ C(RESULT_MISS)   ] = P4_CACHE_EVENT_CONFIG(P4_ITLB_REFERENCE, MISS)
+                                       | KEY_P4_ITLB_OP_READ_RESULT_MISS,
+       },
+       [ C(OP_WRITE) ] = {
+               [ C(RESULT_ACCESS) ] = -1,
+               [ C(RESULT_MISS)   ] = -1,
+       },
+       [ C(OP_PREFETCH) ] = {
+               [ C(RESULT_ACCESS) ] = -1,
+               [ C(RESULT_MISS)   ] = -1,
+       },
+ },
+};
+
 /*
  * WARN: CCCR1 doesn't have a working enable bit so try to not
  * use it if possible
@@ -121,11 +187,77 @@ struct p4_event_template p4_templates[] = {
                .escr_msr       = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
                .cntr           = { 0, 2 },
        },
-       [7] = {
+       [KEY_P4_L1D_OP_READ_RESULT_MISS] = {
+               .opcode = P4_REPLAY_EVENT,
+               .config = 0,
+               .dep    = -1,
+               .msr    = (u64)(1 << 0 | 1 << 24) << 32 | (1 << 0),
+               .key    = KEY_P4_L1D_OP_READ_RESULT_MISS,
+               .emask  =
+                       P4_EVENT_ATTR(P4_REPLAY_EVENT, NBOGUS),
+               .escr_msr       = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR2 },
+               .cntr           = { 16, 17 },
+       },
+       [KEY_P4_LL_OP_READ_RESULT_MISS] = {
+               .opcode = P4_REPLAY_EVENT,
+               .config = 0,
+               .dep    = -1,
+               .msr    = (u64)(1 << 1 | 1 << 24) << 32 | (1 << 0),
+               .key    = KEY_P4_LL_OP_READ_RESULT_MISS,
+               .emask  =
+                       P4_EVENT_ATTR(P4_REPLAY_EVENT, NBOGUS),
+               .escr_msr       = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR2 },
+               .cntr           = { 16, 17 },
+       },
+       [KEY_P4_DTLB_OP_READ_RESULT_MISS] = {
+               .opcode = P4_REPLAY_EVENT,
+               .config = 0,
+               .dep    = -1,
+               .msr    = (u64)(1 << 2 | 1 << 24) << 32 | (1 << 0),
+               .key    = KEY_P4_DTLB_OP_READ_RESULT_MISS,
+               .emask  =
+                       P4_EVENT_ATTR(P4_REPLAY_EVENT, NBOGUS),
+               .escr_msr       = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR2 },
+               .cntr           = { 16, 17 },
+       },
+       [KEY_P4_DTLB_OP_WRITE_RESULT_MISS] = {
+               .opcode = P4_REPLAY_EVENT,
+               .config = 0,
+               .dep    = -1,
+               .msr    = (u64)(1 << 2 | 1 << 24) << 32 | (1 << 1),
+               .key    = KEY_P4_DTLB_OP_WRITE_RESULT_MISS,
+               .emask  =
+                       P4_EVENT_ATTR(P4_REPLAY_EVENT, NBOGUS),
+               .escr_msr       = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR2 },
+               .cntr           = { 16, 17 },
+       },
+       [KEY_P4_ITLB_OP_READ_RESULT_ACCESS] = {
+               .opcode = P4_ITLB_REFERENCE,
+               .config = 0,
+               .dep    = -1,
+               .msr    = 0,
+               .key    = KEY_P4_ITLB_OP_READ_RESULT_ACCESS,
+               .emask  =
+                       P4_EVENT_ATTR(P4_ITLB_REFERENCE, HIT),
+               .escr_msr       = { MSR_P4_ITLB_ESCR0, MSR_P4_ITLB_ESCR1 },
+               .cntr           = { 0, 2 },
+       },
+       [KEY_P4_ITLB_OP_READ_RESULT_MISS] = {
+               .opcode = P4_ITLB_REFERENCE,
+               .config = 0,
+               .dep    = -1,
+               .msr    = 0,
+               .key    = KEY_P4_ITLB_OP_READ_RESULT_MISS,
+               .emask  =
+                       P4_EVENT_ATTR(P4_ITLB_REFERENCE, MISS),
+               .escr_msr       = { MSR_P4_ITLB_ESCR0, MSR_P4_ITLB_ESCR1 },
+               .cntr           = { 0, 2 },
+       },
+       [KEY_P4_UOP_TYPE] = {
                .opcode = P4_UOP_TYPE,
                .config = 0,
                .dep    = -1,
-               .key    = 7,
+               .key    = KEY_P4_UOP_TYPE,
                .emask  =
                        P4_EVENT_ATTR(P4_UOP_TYPE, TAGLOADS)    |
                        P4_EVENT_ATTR(P4_UOP_TYPE, TAGSTORES),
@@ -155,10 +287,6 @@ static u64 p4_pmu_event_map(int hw_event)
        config |= p4_config_pack_cccr(P4_EVENT_UNPACK_SELECTOR(tpl->opcode) << P4_CCCR_ESCR_SELECT_SHIFT);
        config |= p4_config_pack_cccr(hw_event & P4_CCCR_RESERVED);
 
-       /* on HT machine we need a special bit */
-       if (p4_ht_active() && p4_ht_thread(raw_smp_processor_id()))
-               config = p4_set_ht_bit(config);
-
        return config;
 }
 
@@ -211,6 +339,10 @@ static int p4_hw_config(struct perf_event_attr *attr, struct hw_perf_event *hwc)
        /* Count user and OS events unless not requested to */
        hwc->config |= p4_config_pack_escr(p4_default_escr_conf(cpu, attr->exclude_kernel,
                                                                attr->exclude_user));
+       /* on HT machine we need a special bit */
+       if (p4_ht_active() && p4_ht_thread(cpu))
+               hwc->config = p4_set_ht_bit(hwc->config);
+
        return 0;
 }
 
@@ -271,6 +403,12 @@ static void p4_pmu_enable_event(struct perf_event *event)
                pr_crit("%s: Wrong index: %d\n", __func__, hwc->idx);
                return;
        }
+
+       if (tpl->msr) {
+               (void)checking_wrmsrl(MSR_IA32_PEBS_ENABLE, tpl->msr >> 32);
+               (void)checking_wrmsrl(MSR_P4_PEBS_MATRIX_VERT, tpl->msr & 0xffffffff);
+       }
+
        escr_base = (u64)tpl->escr_msr[thread];
 
        /*
@@ -577,6 +715,9 @@ static __init int p4_pmu_init(void)
                return -ENODEV;
        }
 
+       memcpy(hw_cache_event_ids, p4_hw_cache_event_ids,
+              sizeof(hw_cache_event_ids));
+
        pr_cont("Netburst events, ");
 
        x86_pmu = p4_pmu;