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Subject[RFC perf,x86] P4 PMU early draft
Hi all,

first of all the patches are NOT for any kind of inclusion. It's not
ready yet. More likely I'm asking for glance review, ideas, criticism.

The main problem in implementing P4 PMU is that it has much more
restrictions for event to MSR mapping. So to fit into current
perf_events model I made the following:

1) Event representation. P4 uses a tuple of ESCR+CCCR+COUNTER
as an "event". Since every CCCR register mapped directly to
counter itself and ESCR and CCCR uses only 32bits of their
appropriate MSRs, I decided to use "packed" config in
in hw_perf_event::config. So that upper 31 bits are ESCR
and lower 32 bits are CCCR values. The bit 64 is for HT flag.

So the base idea here is to pack into 64bit hw_perf_event::config
as much info as possible.

Due to difference in bitfields I needed to implement
hw_perf_event::config helper which unbind hw_perf_event::config field
from processor specifics and allow to use it in P4 PMU.

2) ESCR mapping. Since ESCR MSRs are not sequential in address space
I introduced a kind of "event template" structure which contains
MSR for particular event. This MSRs are tupled in array for 2 values
and bind to CCCR index so that HT machine with thread 0 should pick
first entry and thread 1 -- second entry.

If HT is disabled or there is an absence of HT support -- we just use
only first counter all the time.

Ideally would be to modify x86_pmu field values that way that in case
of absence of HT we may use all 18 counters at once. Actually there is
erratum pointing out that CCCR1 may not have "enable" bit properly working
so we should just not use it at all. Ie we may use 17 counters at once.

3) Dependant events. Some events (such as counting retired instructions)
requires additional "upstream" counter to be armed (for retired instructions
this is tagging FSB). Not sure how to handle it properly. Perhaps at moment
of scheduling events in we may check out if there is dependant event and
then we try to reserve the counter.

4) Cascading counters. Well, I suppose we may just not support it for some
time.

5) Searching the events. Event templates contain (among other fields)
"opcode" which is just "ESCR event + CCCR selector" packed so every
time I need to find out restriction for particular event I need to
walk over templates array and check for same opcode. I guess it will
be too slow (well, at moment there a few events, but as only array grow
it may become a problem, also iirc some opcodes may intersect).

So the scheme I had in mind was like that:

1) As only caller asking for some generalized event we pack ESCR+CCCR
into "config", check for HT support and put HT bit into config as well.

2) As events go to schedule for execution need to find out proper
hw_perf_event::config into proper template and set proper
hw_perf_event::idx (which is just CCCR MSR number\offset) from
template. Mark this template as borrowed in global p4_pmu_config
space. This allow to find out quickly which ESCR MSR is to be used
in event enabling routing.

Schematically this mapping is

hw_perf_event::config -> template -> hw_perf_event::idx

And back at moment of event enabling

hw_perf_event::idx -> p4_pmu_config[idx] -> template -> ESCR MSR

3) I've started unbinding x86_schedule_events into per x86_pmu::schedule_events
and there I hit hardness in binding HT bit. Have to think...


All in one -- If you have some spare minutes, please take a glance. I can't
say I like this code -- it's overcomplicated and I fear hard to understand.
and still a bit buggy. Complains are welcome!

So any idea would be great. I'm fine in just DROPPING this approach if we may
make code simplier. Perhaps I used wrong way from the very beginning.

Stephane, I know you've been (and still is, right?) working on P4 driver
for libpmu (not sure if I remember correctly this name). Perhaps we should
take some ideas from there?

Ideally would be to track all information hw_perf_event needs in this
stucture itself (but I fear it's already bloated too much) and as only
event is going "schedule in" -- we may check if events have using
non-intersected ESCR+CCCR.

Also I fear I have no that much spare time for this (quite interesting)
task, so if someone would like to beat me on this and find some code
snippets from this patches usefull -- feel free to take any code snippet
you like, though I doubt :-)

-- Cyrill
---
perf,x86: Introduce hw_config helper into x86_pmu
In case if a particular processor (say Netburst) has
a completely different way of configuration we may
use the separate hw_config helper to unbind processor
specifics from __hw_perf_event_init.

Note that the test of BTS support has been changed for
attr->exclude_kernel for the very same reason.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
---
arch/x86/kernel/cpu/perf_event.c | 42 ++++++++++++++++++++++++++-------------
1 file changed, 28 insertions(+), 14 deletions(-)
Index: linux-2.6.git/arch/x86/kernel/cpu/perf_event.c
=====================================================================
--- linux-2.6.git.orig/arch/x86/kernel/cpu/perf_event.c
+++ linux-2.6.git/arch/x86/kernel/cpu/perf_event.c
@@ -139,6 +139,7 @@ struct x86_pmu {
int apic;
u64 max_period;
u64 intel_ctrl;
+ int (*hw_config)(struct perf_event_attr *attr, struct hw_perf_event *hwc);
void (*enable_bts)(u64 config);
void (*disable_bts)(void);

@@ -923,6 +924,25 @@ static void release_pmc_hardware(void)
#endif
}

+static int intel_hw_config(struct perf_event_attr *attr, struct hw_perf_event *hwc)
+{
+ /*
+ * Generate PMC IRQs:
+ * (keep 'enabled' bit clear for now)
+ */
+ hwc->config = ARCH_PERFMON_EVENTSEL_INT;
+
+ /*
+ * Count user and OS events unless requested not to
+ */
+ if (!attr->exclude_user)
+ hwc->config |= ARCH_PERFMON_EVENTSEL_USR;
+ if (!attr->exclude_kernel)
+ hwc->config |= ARCH_PERFMON_EVENTSEL_OS;
+
+ return 0;
+}
+
static inline bool bts_available(void)
{
return x86_pmu.enable_bts != NULL;
@@ -1136,23 +1156,13 @@ static int __hw_perf_event_init(struct p

event->destroy = hw_perf_event_destroy;

- /*
- * Generate PMC IRQs:
- * (keep 'enabled' bit clear for now)
- */
- hwc->config = ARCH_PERFMON_EVENTSEL_INT;
-
hwc->idx = -1;
hwc->last_cpu = -1;
hwc->last_tag = ~0ULL;

- /*
- * Count user and OS events unless requested not to.
- */
- if (!attr->exclude_user)
- hwc->config |= ARCH_PERFMON_EVENTSEL_USR;
- if (!attr->exclude_kernel)
- hwc->config |= ARCH_PERFMON_EVENTSEL_OS;
+ /* Processor specifics */
+ if (x86_pmu.hw_config(attr, hwc))
+ return -EOPNOTSUPP;

if (!hwc->sample_period) {
hwc->sample_period = x86_pmu.max_period;
@@ -1204,7 +1214,7 @@ static int __hw_perf_event_init(struct p
return -EOPNOTSUPP;

/* BTS is currently only allowed for user-mode. */
- if (hwc->config & ARCH_PERFMON_EVENTSEL_OS)
+ if (!attr->exclude_kernel)
return -EOPNOTSUPP;
}

@@ -2371,6 +2381,7 @@ static __initconst struct x86_pmu p6_pmu
.max_events = ARRAY_SIZE(p6_perfmon_event_map),
.apic = 1,
.max_period = (1ULL << 31) - 1,
+ .hw_config = intel_hw_config,
.version = 0,
.num_events = 2,
/*
@@ -2405,6 +2416,7 @@ static __initconst struct x86_pmu core_p
* the generic event period:
*/
.max_period = (1ULL << 31) - 1,
+ .hw_config = intel_hw_config,
.get_event_constraints = intel_get_event_constraints,
.event_constraints = intel_core_event_constraints,
};
@@ -2428,6 +2440,7 @@ static __initconst struct x86_pmu intel_
* the generic event period:
*/
.max_period = (1ULL << 31) - 1,
+ .hw_config = intel_hw_config,
.enable_bts = intel_pmu_enable_bts,
.disable_bts = intel_pmu_disable_bts,
.get_event_constraints = intel_get_event_constraints
@@ -2451,6 +2464,7 @@ static __initconst struct x86_pmu amd_pm
.apic = 1,
/* use highest bit to detect overflow */
.max_period = (1ULL << 47) - 1,
+ .hw_config = intel_hw_config,
.get_event_constraints = amd_get_event_constraints
};
=====================================================================

perf,x86: Introduce minimal Netburst PMU driver
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
---
arch/x86/include/asm/perf_p4.h | 672 +++++++++++++++++++++++++++++++++++++++
arch/x86/kernel/cpu/perf_event.c | 386 +++++++++++++++++++++-
2 files changed, 1050 insertions(+), 8 deletions(-)
Index: linux-2.6.git/arch/x86/include/asm/perf_p4.h
=====================================================================
--- /dev/null
+++ linux-2.6.git/arch/x86/include/asm/perf_p4.h
@@ -0,0 +1,672 @@
+/*
+ * Performance events for P4, old Xeon (Netburst)
+ */
+
+#ifndef PERF_P4_H
+#define PERF_P4_H
+
+#include <linux/cpu.h>
+#include <linux/bitops.h>
+
+/*
+ * NetBurst has perfomance MSRs shared between
+ * threads if HT is turned on (ie for both logical
+ * processors) though Atom with HT support do
+ * not
+ */
+#define ARCH_P4_TOTAL_ESCR (45)
+#define ARCH_P4_RESERVED_ESCR (2) /* IQ_ESCR(0,1) not always present */
+#define ARCH_P4_MAX_ESCR (ARCH_P4_TOTAL_ESCR - ARCH_P4_RESERVED_ESCR)
+#define ARCH_P4_MAX_CCCR (18)
+#define ARCH_P4_MAX_COUNTER (ARCH_P4_MAX_CCCR / 2)
+
+#define P4_EVNTSEL_EVENT_MASK 0x7e000000U
+#define P4_EVNTSEL_EVENT_SHIFT 25
+#define P4_EVNTSEL_EVENTMASK_MASK 0x01fffe00U
+#define P4_EVNTSEL_EVENTMASK_SHIFT 9
+#define P4_EVNTSEL_TAG_MASK 0x000001e0U
+#define P4_EVNTSEL_TAG_SHIFT 5
+#define P4_EVNTSEL_TAG_ENABLE_MASK 0x00000010U
+#define P4_EVNTSEL_T1_USR 0x00000001U
+#define P4_EVNTSEL_T1_OS 0x00000002U
+#define P4_EVNTSEL_T0_USR 0x00000004U
+#define P4_EVNTSEL_T0_OS 0x00000008U
+
+#define P4_EVNTSEL_MASK \
+ (P4_EVNTSEL_EVENT_MASK | \
+ P4_EVNTSEL_EVENTMASK_MASK | \
+ P4_EVNTSEL_TAG_MASK | \
+ P4_EVNTSEL_TAG_ENABLE_MASK | \
+ P4_EVNTSEL_T0_OS | \
+ P4_EVNTSEL_T0_USR)
+
+#define P4_CCCR_OVF 0x80000000U
+#define P4_CCCR_CASCADE 0x40000000U
+#define P4_CCCR_OVF_PMI_T0 0x04000000U
+#define P4_CCCR_OVF_PMI_T1 0x04000000U
+#define P4_CCCR_FORCE_OVF 0x02000000U
+#define P4_CCCR_EDGE 0x01000000U
+#define P4_CCCR_THRESHOLD_MASK 0x00f00000U
+#define P4_CCCR_COMPLEMENT 0x00080000U
+#define P4_CCCR_COMPARE 0x00040000U
+#define P4_CCCR_ESCR_SELECT_MASK 0x0000e000U
+#define P4_CCCR_ESCR_SELECT_SHIFT 13
+#define P4_CCCR_ENABLE 0x00001000U
+#define P4_CCCR_THREAD_SINGLE 0x00010000U
+#define P4_CCCR_THREAD_BOTH 0x00020000U
+#define P4_CCCR_THREAD_ANY 0x00030000U
+
+#define P4_CCCR_MASK \
+ (P4_CCCR_OVF | \
+ P4_CCCR_CASCADE | \
+ P4_CCCR_OVF_PMI_T0 | \
+ P4_CCCR_FORCE_OVF | \
+ P4_CCCR_EDGE | \
+ P4_CCCR_THRESHOLD_MASK | \
+ P4_CCCR_COMPLEMENT | \
+ P4_CCCR_COMPARE | \
+ P4_CCCR_ESCR_SELECT_MASK | \
+ P4_CCCR_ENABLE)
+
+/*
+ * format is 32 bit: ee ss aa aa
+ * where
+ * ee - 8 bit event
+ * ss - 8 bit selector
+ * aa aa - 16 bits reserved for tags
+ */
+#define P4_EVENT_PACK(event, selector) (((event) << 24) | ((selector) << 16))
+#define P4_EVENT_UNPACK_EVENT(packed) (((packed) >> 24) & 0xff)
+#define P4_EVENT_UNPACK_SELECTOR(packed) (((packed) >> 16) & 0xff)
+#define P4_EVENT_PACK_ATTR(attr) ((attr))
+#define P4_EVENT_UNPACK_ATTR(packed) ((packed) & 0xffff)
+#define P4_MAKE_EVENT_ATTR(class, name, bit) class##_##name = (1 << bit)
+#define P4_EVENT_ATTR(class, name) class##_##name
+#define P4_EVENT_ATTR_STR(class, name) __stringify(class##_##name)
+
+/*
+ * config field is 64bit width and consists of
+ * HT << 63 | ESCR << 31 | CCCR
+ * where HT is HyperThreading bit (since ESCR
+ * has it reserved we may use it for own purpose)
+ *
+ * note that this is NOT the addresses of respective
+ * ESCR and CCCR but rather an only packed value should
+ * be unpacked and written to a proper addresses
+ *
+ * the base idea is to pack as much info as
+ * possible
+ */
+#define p4_config_pack_escr(v) (((u64)(v)) << 31)
+#define p4_config_pack_cccr(v) (((u64)(v)) & 0xffffffffULL)
+#define p4_config_unpack_escr(v) (((u64)(v)) >> 31)
+#define p4_config_unpack_cccr(v) (((u64)(v)) & 0xffffffffULL)
+
+#define P4_CONFIG_HT_SHIFT 63
+#define P4_CONFIG_HT (1ULL < P4_CONFIG_HT_SHIFT)
+
+static inline u32 p4_config_unpack_opcode(u64 config)
+{
+ u32 e, s;
+
+ e = (p4_config_unpack_escr(config) & P4_EVNTSEL_EVENT_MASK) >> P4_EVNTSEL_EVENT_SHIFT;
+ s = (p4_config_unpack_cccr(config) & P4_CCCR_ESCR_SELECT_MASK) >> P4_CCCR_ESCR_SELECT_SHIFT;
+
+ return P4_EVENT_PACK(e, s);
+}
+
+static inline bool p4_is_event_cascaded(u64 config)
+{
+ return !!((P4_EVENT_UNPACK_SELECTOR(config)) & P4_CCCR_CASCADE);
+}
+
+static inline bool p4_is_ht_slave(u64 config)
+{
+ return !!(config & P4_CONFIG_HT);
+}
+
+static inline u64 p4_set_ht_bit(u64 config)
+{
+ return config | P4_CONFIG_HT;
+}
+
+static inline u64 p4_clear_ht_bit(u64 config)
+{
+ return config & ~P4_CONFIG_HT;
+}
+
+static inline int p4_ht_active(void)
+{
+#ifdef CONFIG_SMP
+ return smp_num_siblings > 1;
+#endif
+ return 0;
+}
+
+static inline int p4_ht_thread(int cpu)
+{
+#ifdef CONFIG_SMP
+ return cpu != cpumask_first(__get_cpu_var(cpu_sibling_map));
+#endif
+ return 0;
+}
+
+static inline u32 p4_default_cccr_conf(int cpu)
+{
+ u32 cccr;
+
+ if (!p4_ht_active())
+ cccr = P4_CCCR_THREAD_ANY;
+ else
+ cccr = P4_CCCR_THREAD_SINGLE;
+
+ if (!p4_ht_thread(cpu))
+ cccr |= P4_CCCR_OVF_PMI_T0;
+ else
+ cccr |= P4_CCCR_OVF_PMI_T1;
+
+ return cccr;
+}
+
+static inline u32 p4_default_escr_conf(int cpu, int exclude_os, int exclude_usr)
+{
+ u32 escr = 0;
+
+ if (!p4_ht_thread(cpu)) {
+ if (!exclude_os)
+ escr |= P4_EVNTSEL_T0_OS;
+ if (!exclude_usr)
+ escr |= P4_EVNTSEL_T0_USR;
+ } else {
+ if (!exclude_os)
+ escr |= P4_EVNTSEL_T1_OS;
+ if (!exclude_usr)
+ escr |= P4_EVNTSEL_T1_USR;
+ }
+
+ return escr;
+}
+
+/*
+ * Comments below the event represent ESCR restriction
+ * for this event and counter index per ESCR
+ *
+ * MSR_P4_IQ_ESCR0 and MSR_P4_IQ_ESCR1 are available only on early
+ * processor builds (family 0FH, models 01H-02H). These MSRs
+ * are not available on later versions, so that we don't use
+ * them completely
+ *
+ * Also note that CCCR1 do not have P4_CCCR_ENABLE bit properly
+ * working so that we should not use this CCCR and respective
+ * counter as result
+ */
+#define P4_TC_DELIVER_MODE P4_EVENT_PACK(0x01, 0x01)
+ /*
+ * MSR_P4_TC_ESCR0: 4, 5
+ * MSR_P4_TC_ESCR1: 6, 7
+ */
+
+#define P4_BPU_FETCH_REQUEST P4_EVENT_PACK(0x03, 0x00)
+ /*
+ * MSR_P4_BPU_ESCR0: 0, 1
+ * MSR_P4_BPU_ESCR1: 2, 3
+ */
+
+#define P4_ITLB_REFERENCE P4_EVENT_PACK(0x18, 0x03)
+ /*
+ * MSR_P4_ITLB_ESCR0: 0, 1
+ * MSR_P4_ITLB_ESCR1: 2, 3
+ */
+
+#define P4_MEMORY_CANCEL P4_EVENT_PACK(0x02, 0x05)
+ /*
+ * MSR_P4_DAC_ESCR0: 8, 9
+ * MSR_P4_DAC_ESCR1: 10, 11
+ */
+
+#define P4_MEMORY_COMPLETE P4_EVENT_PACK(0x08, 0x02)
+ /*
+ * MSR_P4_SAAT_ESCR0: 8, 9
+ * MSR_P4_SAAT_ESCR1: 10, 11
+ */
+
+#define P4_LOAD_PORT_REPLAY P4_EVENT_PACK(0x04, 0x02)
+ /*
+ * MSR_P4_SAAT_ESCR0: 8, 9
+ * MSR_P4_SAAT_ESCR1: 10, 11
+ */
+
+#define P4_STORE_PORT_REPLAY P4_EVENT_PACK(0x05, 0x02)
+ /*
+ * MSR_P4_SAAT_ESCR0: 8, 9
+ * MSR_P4_SAAT_ESCR1: 10, 11
+ */
+
+#define P4_MOB_LOAD_REPLAY P4_EVENT_PACK(0x03, 0x02)
+ /*
+ * MSR_P4_MOB_ESCR0: 0, 1
+ * MSR_P4_MOB_ESCR1: 2, 3
+ */
+
+#define P4_PAGE_WALK_TYPE P4_EVENT_PACK(0x01, 0x04)
+ /*
+ * MSR_P4_PMH_ESCR0: 0, 1
+ * MSR_P4_PMH_ESCR1: 2, 3
+ */
+
+#define P4_BSQ_CACHE_REFERENCE P4_EVENT_PACK(0x0c, 0x07)
+ /*
+ * MSR_P4_BSU_ESCR0: 0, 1
+ * MSR_P4_BSU_ESCR1: 2, 3
+ */
+
+#define P4_IOQ_ALLOCATION P4_EVENT_PACK(0x03, 0x06)
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+#define P4_IOQ_ACTIVE_ENTRIES P4_EVENT_PACK(0x1a, 0x06)
+ /*
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+#define P4_FSB_DATA_ACTIVITY P4_EVENT_PACK(0x17, 0x06)
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+#define P4_BSQ_ALLOCATION P4_EVENT_PACK(0x05, 0x07)
+ /*
+ * MSR_P4_BSU_ESCR0: 0, 1
+ */
+
+#define P4_BSQ_ACTIVE_ENTRIES P4_EVENT_PACK(0x06, 0x07)
+ /*
+ * MSR_P4_BSU_ESCR1: 2, 3
+ */
+
+#define P4_SSE_INPUT_ASSIST P4_EVENT_PACK(0x34, 0x01)
+ /*
+ * MSR_P4_FIRM_ESCR: 8, 9
+ * MSR_P4_FIRM_ESCR: 10, 11
+ */
+
+#define P4_PACKED_SP_UOP P4_EVENT_PACK(0x08, 0x01)
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+#define P4_PACKED_DP_UOP P4_EVENT_PACK(0x0c, 0x01)
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+#define P4_SCALAR_SP_UOP P4_EVENT_PACK(0x0a, 0x01)
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+#define P4_SCALAR_DP_UOP P4_EVENT_PACK(0x0e, 0x01)
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+#define P4_64BIT_MMX_UOP P4_EVENT_PACK(0x02, 0x01)
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+#define P4_128BIT_MMX_UOP P4_EVENT_PACK(0x1a, 0x01)
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+#define P4_X87_FP_UOP P4_EVENT_PACK(0x04, 0x01)
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+#define P4_TC_MISC P4_EVENT_PACK(0x06, 0x01)
+ /*
+ * MSR_P4_TC_ESCR0: 4, 5
+ * MSR_P4_TC_ESCR1: 6, 7
+ */
+
+#define P4_GLOBAL_POWER_EVENTS P4_EVENT_PACK(0x13, 0x06)
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+#define P4_TC_MS_XFER P4_EVENT_PACK(0x05, 0x00)
+ /*
+ * MSR_P4_MS_ESCR0: 4, 5
+ * MSR_P4_MS_ESCR1: 6, 7
+ */
+
+#define P4_UOP_QUEUE_WRITES P4_EVENT_PACK(0x09, 0x00)
+ /*
+ * MSR_P4_MS_ESCR0: 4, 5
+ * MSR_P4_MS_ESCR1: 6, 7
+ */
+
+#define P4_RETIRED_MISPRED_BRANCH_TYPE P4_EVENT_PACK(0x05, 0x02)
+ /*
+ * MSR_P4_TBPU_ESCR0: 4, 5
+ * MSR_P4_TBPU_ESCR0: 6, 7
+ */
+
+#define P4_RETIRED_BRANCH_TYPE P4_EVENT_PACK(0x04, 0x02)
+ /*
+ * MSR_P4_TBPU_ESCR0: 4, 5
+ * MSR_P4_TBPU_ESCR0: 6, 7
+ */
+
+#define P4_RESOURCE_STALL P4_EVENT_PACK(0x01, 0x01)
+ /*
+ * MSR_P4_ALF_ESCR0: 12, 13, 16
+ * MSR_P4_ALF_ESCR1: 14, 15, 17
+ */
+
+#define P4_WC_BUFFER P4_EVENT_PACK(0x05, 0x05)
+ /*
+ * MSR_P4_DAC_ESCR0: 8, 9
+ * MSR_P4_DAC_ESCR1: 10, 11
+ */
+
+#define P4_B2B_CYCLES P4_EVENT_PACK(0x16, 0x03)
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+#define P4_BNR P4_EVENT_PACK(0x08, 0x03)
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+#define P4_SNOOP P4_EVENT_PACK(0x06, 0x03)
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+#define P4_RESPONSE P4_EVENT_PACK(0x04, 0x03)
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+#define P4_FRONT_END_EVENT P4_EVENT_PACK(0x08, 0x05)
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+#define P4_EXECUTION_EVENT P4_EVENT_PACK(0x0c, 0x05)
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+#define P4_REPLAY_EVENT P4_EVENT_PACK(0x09, 0x05)
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+#define P4_INSTR_RETIRED P4_EVENT_PACK(0x02, 0x04)
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+#define P4_UOPS_RETIRED P4_EVENT_PACK(0x01, 0x04)
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+#define P4_UOP_TYPE P4_EVENT_PACK(0x02, 0x02)
+ /*
+ * MSR_P4_RAT_ESCR0: 12, 13, 16
+ * MSR_P4_RAT_ESCR1: 14, 15, 17
+ */
+
+#define P4_BRANCH_RETIRED P4_EVENT_PACK(0x06, 0x05)
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+#define P4_MISPRED_BRANCH_RETIRED P4_EVENT_PACK(0x03, 0x04)
+ /*
+ * MSR_P4_CRU_ESCR0: 12, 13, 16
+ * MSR_P4_CRU_ESCR1: 14, 15, 17
+ */
+
+#define P4_X87_ASSIST P4_EVENT_PACK(0x03, 0x05)
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+#define P4_MACHINE_CLEAR P4_EVENT_PACK(0x02, 0x05)
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+#define P4_INSTR_COMPLETED P4_EVENT_PACK(0x07, 0x04)
+ /*
+ * MSR_P4_CRU_ESCR0: 12, 13, 16
+ * MSR_P4_CRU_ESCR1: 14, 15, 17
+ */
+
+/*
+ * a caller should use P4_EVENT_ATTR helper to
+ * pick the attribute needed, for example
+ *
+ * P4_EVENT_ATTR(P4_TC_DELIVER_MODE, DD)
+ */
+enum P4_EVENTS_ATTR {
+ P4_MAKE_EVENT_ATTR(P4_TC_DELIVER_MODE, DD, 0),
+ P4_MAKE_EVENT_ATTR(P4_TC_DELIVER_MODE, DB, 1),
+ P4_MAKE_EVENT_ATTR(P4_TC_DELIVER_MODE, DI, 2),
+ P4_MAKE_EVENT_ATTR(P4_TC_DELIVER_MODE, BD, 3),
+ P4_MAKE_EVENT_ATTR(P4_TC_DELIVER_MODE, BB, 4),
+ P4_MAKE_EVENT_ATTR(P4_TC_DELIVER_MODE, BI, 5),
+ P4_MAKE_EVENT_ATTR(P4_TC_DELIVER_MODE, ID, 6),
+
+ P4_MAKE_EVENT_ATTR(P4_BPU_FETCH_REQUEST, TCMISS, 0),
+
+ P4_MAKE_EVENT_ATTR(P4_ITLB_REFERENCE, HIT, 0),
+ P4_MAKE_EVENT_ATTR(P4_ITLB_REFERENCE, MISS, 1),
+ P4_MAKE_EVENT_ATTR(P4_ITLB_REFERENCE, HIT_UK, 2),
+
+ P4_MAKE_EVENT_ATTR(P4_MEMORY_CANCEL, ST_RB_FULL, 2),
+ P4_MAKE_EVENT_ATTR(P4_MEMORY_CANCEL, 64K_CONF, 3),
+
+ P4_MAKE_EVENT_ATTR(P4_MEMORY_COMPLETE, LSC, 0),
+ P4_MAKE_EVENT_ATTR(P4_MEMORY_COMPLETE, SSC, 1),
+
+ P4_MAKE_EVENT_ATTR(P4_LOAD_PORT_REPLAY, SPLIT_LD, 1),
+
+ P4_MAKE_EVENT_ATTR(P4_STORE_PORT_REPLAY, SPLIT_ST, 1),
+
+ P4_MAKE_EVENT_ATTR(P4_MOB_LOAD_REPLAY, NO_STA, 1),
+ P4_MAKE_EVENT_ATTR(P4_MOB_LOAD_REPLAY, NO_STD, 3),
+ P4_MAKE_EVENT_ATTR(P4_MOB_LOAD_REPLAY, PARTIAL_DATA, 4),
+ P4_MAKE_EVENT_ATTR(P4_MOB_LOAD_REPLAY, UNALGN_ADDR, 5),
+
+ P4_MAKE_EVENT_ATTR(P4_PAGE_WALK_TYPE, DTMISS, 0),
+ P4_MAKE_EVENT_ATTR(P4_PAGE_WALK_TYPE, ITMISS, 1),
+
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_2ndL_HITS, 0),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_2ndL_HITE, 1),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_2ndL_HITM, 2),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_3rdL_HITS, 3),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_3rdL_HITE, 4),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_3rdL_HITM, 5),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_2ndL_MISS, 8),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_3rdL_MISS, 9),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, WR_2ndL_MISS, 10),
+
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, DEFAULT, 0),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, ALL_READ, 5),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, ALL_WRITE, 6),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, MEM_UC, 7),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, MEM_WC, 8),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, MEM_WT, 9),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, MEM_WP, 10),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, MEM_WB, 11),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, OWN, 13),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, OTHER, 14),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ALLOCATION, PREFETCH, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, DEFAULT, 0),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, ALL_READ, 5),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, ALL_WRITE, 6),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, MEM_UC, 7),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, MEM_WC, 8),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, MEM_WT, 9),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, MEM_WP, 10),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, MEM_WB, 11),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, OWN, 13),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, OTHER, 14),
+ P4_MAKE_EVENT_ATTR(P4_IOQ_ACTIVE_ENTRIES, PREFETCH, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_FSB_DATA_ACTIVITY, DRDY_DRV, 0),
+ P4_MAKE_EVENT_ATTR(P4_FSB_DATA_ACTIVITY, DRDY_OWN, 1),
+ P4_MAKE_EVENT_ATTR(P4_FSB_DATA_ACTIVITY, DRDY_OTHER, 2),
+ P4_MAKE_EVENT_ATTR(P4_FSB_DATA_ACTIVITY, DBSY_DRV, 3),
+ P4_MAKE_EVENT_ATTR(P4_FSB_DATA_ACTIVITY, DBSY_OWN, 4),
+ P4_MAKE_EVENT_ATTR(P4_FSB_DATA_ACTIVITY, DBSY_OTHER, 5),
+
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_TYPE0, 0),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_TYPE1, 1),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_LEN0, 2),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_LEN1, 3),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_IO_TYPE, 5),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_LOCK_TYPE, 6),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_CACHE_TYPE, 7),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_SPLIT_TYPE, 8),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_DEM_TYPE, 9),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, REQ_ORD_TYPE, 10),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, MEM_TYPE0, 11),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, MEM_TYPE1, 12),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ALLOCATION, MEM_TYPE2, 13),
+
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_TYPE0, 0),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_TYPE1, 1),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_LEN0, 2),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_LEN1, 3),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_IO_TYPE, 5),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_LOCK_TYPE, 6),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_CACHE_TYPE, 7),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_SPLIT_TYPE, 8),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_DEM_TYPE, 9),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, REQ_ORD_TYPE, 10),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, MEM_TYPE0, 11),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, MEM_TYPE1, 12),
+ P4_MAKE_EVENT_ATTR(P4_BSQ_ACTIVE_ENTRIES, MEM_TYPE2, 13),
+
+ P4_MAKE_EVENT_ATTR(P4_SSE_INPUT_ASSIST, ALL, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_PACKED_SP_UOP, ALL, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_PACKED_DP_UOP, ALL, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_SCALAR_SP_UOP, ALL, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_SCALAR_DP_UOP, ALL, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_64BIT_MMX_UOP, ALL, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_128BIT_MMX_UOP, ALL, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_X87_FP_UOP, ALL, 15),
+
+ P4_MAKE_EVENT_ATTR(P4_TC_MISC, FLUSH, 4),
+
+ P4_MAKE_EVENT_ATTR(P4_GLOBAL_POWER_EVENTS, RUNNING, 0),
+
+ P4_MAKE_EVENT_ATTR(P4_TC_MS_XFER, CISC, 0),
+
+ P4_MAKE_EVENT_ATTR(P4_UOP_QUEUE_WRITES, FROM_TC_BUILD, 0),
+ P4_MAKE_EVENT_ATTR(P4_UOP_QUEUE_WRITES, FROM_TC_DELIVER, 1),
+ P4_MAKE_EVENT_ATTR(P4_UOP_QUEUE_WRITES, FROM_ROM, 2),
+
+ P4_MAKE_EVENT_ATTR(P4_RETIRED_MISPRED_BRANCH_TYPE, CONDITIONAL, 1),
+ P4_MAKE_EVENT_ATTR(P4_RETIRED_MISPRED_BRANCH_TYPE, CALL, 2),
+ P4_MAKE_EVENT_ATTR(P4_RETIRED_MISPRED_BRANCH_TYPE, RETURN, 3),
+ P4_MAKE_EVENT_ATTR(P4_RETIRED_MISPRED_BRANCH_TYPE, INDIRECT, 4),
+
+ P4_MAKE_EVENT_ATTR(P4_RETIRED_BRANCH_TYPE, CONDITIONAL, 1),
+ P4_MAKE_EVENT_ATTR(P4_RETIRED_BRANCH_TYPE, CALL, 2),
+ P4_MAKE_EVENT_ATTR(P4_RETIRED_BRANCH_TYPE, RETURN, 3),
+ P4_MAKE_EVENT_ATTR(P4_RETIRED_BRANCH_TYPE, INDIRECT, 4),
+
+ P4_MAKE_EVENT_ATTR(P4_RESOURCE_STALL, SBFULL, 5),
+
+ P4_MAKE_EVENT_ATTR(P4_WC_BUFFER, WCB_EVICTS, 0),
+ P4_MAKE_EVENT_ATTR(P4_WC_BUFFER, WCB_FULL_EVICTS, 1),
+
+ P4_MAKE_EVENT_ATTR(P4_FRONT_END_EVENT, NBOGUS, 0),
+ P4_MAKE_EVENT_ATTR(P4_FRONT_END_EVENT, BOGUS, 1),
+
+ P4_MAKE_EVENT_ATTR(P4_EXECUTION_EVENT, NBOGUS0, 0),
+ P4_MAKE_EVENT_ATTR(P4_EXECUTION_EVENT, NBOGUS1, 1),
+ P4_MAKE_EVENT_ATTR(P4_EXECUTION_EVENT, NBOGUS2, 2),
+ P4_MAKE_EVENT_ATTR(P4_EXECUTION_EVENT, NBOGUS3, 3),
+ P4_MAKE_EVENT_ATTR(P4_EXECUTION_EVENT, BOGUS0, 4),
+ P4_MAKE_EVENT_ATTR(P4_EXECUTION_EVENT, BOGUS1, 5),
+ P4_MAKE_EVENT_ATTR(P4_EXECUTION_EVENT, BOGUS2, 6),
+ P4_MAKE_EVENT_ATTR(P4_EXECUTION_EVENT, BOGUS3, 7),
+
+ P4_MAKE_EVENT_ATTR(P4_REPLAY_EVENT, NBOGUS, 0),
+ P4_MAKE_EVENT_ATTR(P4_REPLAY_EVENT, BOGUS, 1),
+
+ P4_MAKE_EVENT_ATTR(P4_INSTR_RETIRED, NBOGUSNTAG, 0),
+ P4_MAKE_EVENT_ATTR(P4_INSTR_RETIRED, NBOGUSTAG, 1),
+ P4_MAKE_EVENT_ATTR(P4_INSTR_RETIRED, BOGUSNTAG, 2),
+ P4_MAKE_EVENT_ATTR(P4_INSTR_RETIRED, BOGUSTAG, 3),
+
+ P4_MAKE_EVENT_ATTR(P4_UOPS_RETIRED, NBOGUS, 0),
+ P4_MAKE_EVENT_ATTR(P4_UOPS_RETIRED, BOGUS, 1),
+
+ P4_MAKE_EVENT_ATTR(P4_UOP_TYPE, TAGLOADS, 1),
+ P4_MAKE_EVENT_ATTR(P4_UOP_TYPE, TAGSTORES, 2),
+
+ P4_MAKE_EVENT_ATTR(P4_BRANCH_RETIRED, MMNP, 0),
+ P4_MAKE_EVENT_ATTR(P4_BRANCH_RETIRED, MMNM, 1),
+ P4_MAKE_EVENT_ATTR(P4_BRANCH_RETIRED, MMTP, 2),
+ P4_MAKE_EVENT_ATTR(P4_BRANCH_RETIRED, MMTM, 3),
+
+ P4_MAKE_EVENT_ATTR(P4_MISPRED_BRANCH_RETIRED, NBOGUS, 0),
+
+ P4_MAKE_EVENT_ATTR(P4_X87_ASSIST, FPSU, 0),
+ P4_MAKE_EVENT_ATTR(P4_X87_ASSIST, FPSO, 1),
+ P4_MAKE_EVENT_ATTR(P4_X87_ASSIST, POAO, 2),
+ P4_MAKE_EVENT_ATTR(P4_X87_ASSIST, POAU, 3),
+ P4_MAKE_EVENT_ATTR(P4_X87_ASSIST, PREA, 4),
+
+ P4_MAKE_EVENT_ATTR(P4_MACHINE_CLEAR, CLEAR, 0),
+ P4_MAKE_EVENT_ATTR(P4_MACHINE_CLEAR, MOCLEAR, 1),
+ P4_MAKE_EVENT_ATTR(P4_MACHINE_CLEAR, SMCLEAR, 2),
+
+ P4_MAKE_EVENT_ATTR(P4_INSTR_COMPLETED, NBOGUS, 0),
+ P4_MAKE_EVENT_ATTR(P4_INSTR_COMPLETED, BOGUS, 1),
+};
+
+#endif /* PERF_P4_H */
Index: linux-2.6.git/arch/x86/kernel/cpu/perf_event.c
=====================================================================
--- linux-2.6.git.orig/arch/x86/kernel/cpu/perf_event.c
+++ linux-2.6.git/arch/x86/kernel/cpu/perf_event.c
@@ -26,6 +26,7 @@
#include <linux/bitops.h>

#include <asm/apic.h>
+#include <asm/perf_p4.h>
#include <asm/stacktrace.h>
#include <asm/nmi.h>

@@ -140,6 +141,7 @@ struct x86_pmu {
u64 max_period;
u64 intel_ctrl;
int (*hw_config)(struct perf_event_attr *attr, struct hw_perf_event *hwc);
+ int (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign);
void (*enable_bts)(u64 config);
void (*disable_bts)(void);

@@ -1233,6 +1235,352 @@ static void p6_pmu_disable_all(void)
wrmsrl(MSR_P6_EVNTSEL0, val);
}

+/*
+ * offset: 0 - BSP thread, 1 - secondary thread
+ * used in HT enabled cpu
+ */
+struct p4_event_template {
+ u32 opcode; /* ESCR event + CCCR selector */
+ unsigned int emask; /* ESCR EventMask */
+ unsigned int escr_msr[2]; /* ESCR MSR for this event */
+ int cntr[2]; /* counter index */
+};
+
+static struct {
+ /*
+ * maps hw_conf::idx into template
+ */
+ struct p4_event_template *tpl[ARCH_P4_MAX_CCCR];
+} p4_pmu_config;
+
+/*
+ * Netburst is heavily constrained :(
+ */
+#if 0
+#define P4_EVENT_CONSTRAINT(c, n) \
+ EVENT_CONSTRAINT(c, n, (P4_EVNTSEL_MASK | P4_CCCR_MASK))
+
+static struct event_constraint p4_event_constraints[] =
+{
+ EVENT_CONSTRAINT_END
+};
+#endif
+
+/*
+ * CCCR1 doesn't have a working enable bit so do not use it ever
+ *
+ * Also as only we start to support raw events we will need to
+ * append _all_ P4_EVENT_PACK'ed events here
+ */
+struct p4_event_template p4_templates[] =
+{
+ [0] = {
+ P4_UOP_TYPE,
+ P4_EVENT_ATTR(P4_UOP_TYPE, TAGLOADS) |
+ P4_EVENT_ATTR(P4_UOP_TYPE, TAGSTORES),
+ { MSR_P4_RAT_ESCR0, MSR_P4_RAT_ESCR1},
+ { 16, 17 },
+ },
+ [1] = {
+ P4_GLOBAL_POWER_EVENTS,
+ P4_EVENT_ATTR(P4_GLOBAL_POWER_EVENTS, RUNNING),
+ { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
+ { 0, 2 },
+ },
+ [2] = {
+ P4_INSTR_RETIRED,
+ P4_EVENT_ATTR(P4_INSTR_RETIRED, NBOGUSNTAG) |
+ P4_EVENT_ATTR(P4_INSTR_RETIRED, NBOGUSTAG) |
+ P4_EVENT_ATTR(P4_INSTR_RETIRED, BOGUSNTAG) |
+ P4_EVENT_ATTR(P4_INSTR_RETIRED, BOGUSTAG),
+ { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
+ { 12, 14 },
+ },
+ [3] = {
+ P4_BSQ_CACHE_REFERENCE,
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_2ndL_HITS) |
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_2ndL_HITE) |
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_2ndL_HITM) |
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_3rdL_HITS) |
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_3rdL_HITE) |
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_3rdL_HITM),
+ { MSR_P4_BSU_ESCR0, MSR_P4_BSU_ESCR1 },
+ { 0, 1 },
+ },
+ [4] = {
+ P4_BSQ_CACHE_REFERENCE,
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_2ndL_MISS) |
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, RD_3rdL_MISS) |
+ P4_EVENT_ATTR(P4_BSQ_CACHE_REFERENCE, WR_2ndL_MISS),
+ { MSR_P4_BSU_ESCR0, MSR_P4_BSU_ESCR1 },
+ { 2, 3 },
+ },
+ [5] = {
+ P4_RETIRED_BRANCH_TYPE,
+ P4_EVENT_ATTR(P4_RETIRED_BRANCH_TYPE, CONDITIONAL) |
+ P4_EVENT_ATTR(P4_RETIRED_BRANCH_TYPE, CALL) |
+ P4_EVENT_ATTR(P4_RETIRED_BRANCH_TYPE, RETURN) |
+ P4_EVENT_ATTR(P4_RETIRED_BRANCH_TYPE, INDIRECT),
+ { MSR_P4_TBPU_ESCR0, MSR_P4_TBPU_ESCR0 },
+ { 4, 6 },
+ },
+ [6] = {
+ P4_MISPRED_BRANCH_RETIRED,
+ P4_EVENT_ATTR(P4_RETIRED_MISPRED_BRANCH_TYPE, CONDITIONAL) |
+ P4_EVENT_ATTR(P4_RETIRED_MISPRED_BRANCH_TYPE, CALL) |
+ P4_EVENT_ATTR(P4_RETIRED_MISPRED_BRANCH_TYPE, RETURN) |
+ P4_EVENT_ATTR(P4_RETIRED_MISPRED_BRANCH_TYPE, INDIRECT),
+ { MSR_P4_TBPU_ESCR0, MSR_P4_CRU_ESCR1 },
+ { 12, 14 },
+ },
+ [7] = {
+ P4_FSB_DATA_ACTIVITY,
+ P4_EVENT_ATTR(P4_FSB_DATA_ACTIVITY, DRDY_DRV) |
+ P4_EVENT_ATTR(P4_FSB_DATA_ACTIVITY, DRDY_OWN),
+ { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1},
+ { 0, 2 },
+ },
+};
+
+static struct p4_event_template *p4_event_map[PERF_COUNT_HW_MAX] =
+{
+ /* non-halted CPU clocks */
+ [PERF_COUNT_HW_CPU_CYCLES] = &p4_templates[1],
+
+ /* retired instructions: dep on tagging FSB */
+ [PERF_COUNT_HW_INSTRUCTIONS] = &p4_templates[0],
+
+ /* cache hits */
+ [PERF_COUNT_HW_CACHE_REFERENCES] = &p4_templates[3],
+
+ /* cache misses */
+ [PERF_COUNT_HW_CACHE_MISSES] = &p4_templates[4],
+
+ /* branch instructions retired */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = &p4_templates[5],
+
+ /* mispredicted branches retired */
+ [PERF_COUNT_HW_BRANCH_MISSES] = &p4_templates[6],
+
+ /* bus ready clocks (cpu is driving #DRDY_DRV\#DRDY_OWN): */
+ [PERF_COUNT_HW_BUS_CYCLES] = &p4_templates[7],
+};
+
+static u64 p4_pmu_event_map(int hw_event)
+{
+ struct p4_event_template *tpl = p4_event_map[hw_event];
+ u64 config;
+
+ config = p4_config_pack_escr(P4_EVENT_UNPACK_EVENT(tpl->opcode) << P4_EVNTSEL_EVENT_SHIFT);
+ config |= p4_config_pack_escr(tpl->emask << P4_EVNTSEL_EVENTMASK_SHIFT);
+ config |= p4_config_pack_cccr(P4_EVENT_UNPACK_SELECTOR(tpl->opcode) << P4_CCCR_ESCR_SELECT_SHIFT);
+
+ /* on HT machine we need a special bit */
+ if (p4_ht_active() && p4_ht_thread(smp_processor_id()))
+ config = p4_set_ht_bit(config);
+
+ return config;
+}
+
+static struct p4_event_template *p4_pmu_template_lookup(u64 config)
+{
+ u32 opcode = p4_config_unpack_opcode(config);
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(p4_templates); i++) {
+ if (opcode == p4_templates[i].opcode)
+ return &p4_templates[i];
+ }
+
+ return NULL;
+}
+
+/*
+ * We don't control raw events so it's up to the caller
+ * to pass sane values (and we don't count thread number
+ * on HT machine as well here)
+ */
+static u64 p4_pmu_raw_event(u64 hw_event)
+{
+ return hw_event &
+ (p4_config_pack_escr(P4_EVNTSEL_MASK) |
+ p4_config_pack_cccr(P4_CCCR_MASK));
+}
+
+static int p4_hw_config(struct perf_event_attr *attr, struct hw_perf_event *hwc)
+{
+ int cpu = smp_processor_id();
+
+ /* CCCR by default */
+ hwc->config = p4_config_pack_cccr(p4_default_cccr_conf(cpu));
+
+ /* Count user and OS events unless requested not to */
+ hwc->config |= p4_config_pack_escr(p4_default_escr_conf(cpu, attr->exclude_kernel,
+ attr->exclude_user));
+ return 0;
+}
+
+static inline void p4_pmu_disable_event(struct hw_perf_event *hwc, int idx)
+{
+ /*
+ * If event gets disabled while counter is in overflowed
+ * state we need to clear P4_CCCR_OVF otherwise interrupt get
+ * asserted again right after this event is enabled
+ */
+ (void)checking_wrmsrl(hwc->config_base + idx,
+ (u64)(p4_config_unpack_cccr(hwc->config)) & ~P4_CCCR_ENABLE & ~P4_CCCR_OVF);
+}
+
+static void p4_pmu_disable_all(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ int idx;
+
+ for (idx = 0; idx < x86_pmu.num_events; idx++) {
+ struct perf_event *event = cpuc->events[idx];
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+ p4_pmu_disable_event(&event->hw, idx);
+ }
+}
+
+static void p4_pmu_enable_event(struct hw_perf_event *hwc, int idx)
+{
+ int thread = p4_ht_thread(hwc->config);
+ struct p4_event_template *tpl = p4_pmu_config.tpl[idx];
+ u64 escr_base = (u64)tpl->escr_msr[thread];
+ u64 escr_conf = p4_config_unpack_escr(hwc->config);
+
+ /*
+ * - we dont support cascaded counters yet
+ * - and counter 1 is broken (erratum)
+ */
+ WARN_ON_ONCE(p4_is_event_cascaded(hwc->config));
+ WARN_ON_ONCE(idx == 1);
+
+ (void)checking_wrmsrl(escr_base, p4_clear_ht_bit(escr_conf));
+ (void)checking_wrmsrl(hwc->config_base + idx,
+ (u64)(p4_config_unpack_cccr(hwc->config)) | P4_CCCR_ENABLE);
+}
+
+static void p4_pmu_enable_all(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ int idx;
+
+ for (idx = 0; idx < x86_pmu.num_events; idx++) {
+ struct perf_event *event = cpuc->events[idx];
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+ p4_pmu_enable_event(&event->hw, idx);
+ }
+}
+
+static int p4_pmu_handle_irq(struct pt_regs *regs)
+{
+ struct perf_sample_data data;
+ struct cpu_hw_events *cpuc;
+ struct perf_event *event;
+ struct hw_perf_event *hwc;
+ int idx, handled = 0;
+ u64 val;
+
+ data.addr = 0;
+ data.raw = NULL;
+
+ cpuc = &__get_cpu_var(cpu_hw_events);
+
+ for (idx = 0; idx < x86_pmu.num_events; idx++) {
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+
+ event = cpuc->events[idx];
+ hwc = &event->hw;
+
+ val = x86_perf_event_update(event, hwc, idx);
+ if (val & (1ULL << (x86_pmu.event_bits - 1)))
+ continue;
+
+ /*
+ * event overflow
+ */
+ handled = 1;
+ data.period = event->hw.last_period;
+
+ if (!x86_perf_event_set_period(event, hwc, idx))
+ continue;
+ if (perf_event_overflow(event, 1, &data, regs))
+ p4_pmu_disable_event(hwc, idx);
+ }
+
+ if (handled) {
+ /* p4 quirk: unmask it */
+ apic_write(APIC_LVTPC, apic_read(APIC_LVTPC) & ~APIC_LVT_MASKED);
+ inc_irq_stat(apic_perf_irqs);
+ }
+
+ return handled;
+}
+
+/*
+ * Netburst has a quite constrained architecture
+ */
+static int p4_pmu_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
+{
+ unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
+ struct p4_event_template *tpl;
+ struct hw_perf_event *hwc;
+ int cpu = smp_processor_id();
+ int thread;
+ int i, j, num = 0;
+
+ bitmap_zero(used_mask, X86_PMC_IDX_MAX);
+
+ for (i = 0; i < n; i++) {
+ hwc = &cpuc->event_list[i]->hw;
+ tpl = p4_pmu_template_lookup(hwc->config);
+ if (!tpl)
+ break;
+ thread = p4_ht_thread(hwc->config);
+
+ /*
+ * FIXME: We need assign a proper index
+ * from p4_event_template and then take
+ * into account HT thread
+ */
+ }
+
+done:
+ return num ? -ENOSPC : 0;
+}
+
+static __initconst struct x86_pmu p4_pmu = {
+ .name = "Netburst",
+ .handle_irq = p4_pmu_handle_irq,
+ .disable_all = p4_pmu_disable_all,
+ .enable_all = p4_pmu_enable_all,
+ .enable = p4_pmu_enable_event,
+ .disable = p4_pmu_disable_event,
+ .eventsel = MSR_P4_BPU_CCCR0,
+ .perfctr = MSR_P4_BPU_PERFCTR0,
+ .event_map = p4_pmu_event_map,
+ .raw_event = p4_pmu_raw_event,
+ .max_events = ARRAY_SIZE(p4_event_map),
+ /*
+ * IF HT disabled we may need to use all
+ * ARCH_P4_MAX_CCCR counters simulaneously
+ * though leave it restricted at moment assuming
+ * HT is on
+ */
+ .num_events = ARCH_P4_MAX_COUNTER,
+ .apic = 1,
+ .event_bits = 40,
+ .event_mask = (1ULL << 40) - 1,
+ .max_period = (1ULL << 39) - 1,
+ .hw_config = p4_hw_config,
+ .schedule_events = p4_pmu_schedule_events,
+};
+
static void intel_pmu_disable_all(void)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
@@ -1747,7 +2095,6 @@ static void p6_pmu_enable_event(struct h
(void)checking_wrmsrl(hwc->config_base + idx, val);
}

-
static void intel_pmu_enable_event(struct hw_perf_event *hwc, int idx)
{
if (unlikely(idx == X86_PMC_IDX_FIXED_BTS)) {
@@ -2313,7 +2660,7 @@ int hw_perf_group_sched_in(struct perf_e
if (n0 < 0)
return n0;

- ret = x86_schedule_events(cpuc, n0, assign);
+ ret = x86_pmu.schedule_events(cpuc, n0, assign);
if (ret)
return ret;

@@ -2382,6 +2729,7 @@ static __initconst struct x86_pmu p6_pmu
.apic = 1,
.max_period = (1ULL << 31) - 1,
.hw_config = intel_hw_config,
+ .schedule_events = x86_schedule_events,
.version = 0,
.num_events = 2,
/*
@@ -2417,6 +2765,7 @@ static __initconst struct x86_pmu core_p
*/
.max_period = (1ULL << 31) - 1,
.hw_config = intel_hw_config,
+ .schedule_events = x86_schedule_events,
.get_event_constraints = intel_get_event_constraints,
.event_constraints = intel_core_event_constraints,
};
@@ -2441,6 +2790,7 @@ static __initconst struct x86_pmu intel_
*/
.max_period = (1ULL << 31) - 1,
.hw_config = intel_hw_config,
+ .schedule_events = x86_schedule_events,
.enable_bts = intel_pmu_enable_bts,
.disable_bts = intel_pmu_disable_bts,
.get_event_constraints = intel_get_event_constraints
@@ -2465,6 +2815,7 @@ static __initconst struct x86_pmu amd_pm
/* use highest bit to detect overflow */
.max_period = (1ULL << 47) - 1,
.hw_config = intel_hw_config,
+ .schedule_events = x86_schedule_events,
.get_event_constraints = amd_get_event_constraints
};

@@ -2493,6 +2844,24 @@ static __init int p6_pmu_init(void)
return 0;
}

+static __init int p4_pmu_init(void)
+{
+ unsigned int low, high;
+
+ rdmsr(MSR_IA32_MISC_ENABLE, low, high);
+ if (!(low & (1 << 7))) {
+ pr_cont("unsupported Netburst CPU model %d ",
+ boot_cpu_data.x86_model);
+ return -ENODEV;
+ }
+
+ pr_cont("Netburst events, ");
+
+ x86_pmu = p4_pmu;
+
+ return 0;
+}
+
static __init int intel_pmu_init(void)
{
union cpuid10_edx edx;
@@ -2502,12 +2871,13 @@ static __init int intel_pmu_init(void)
int version;

if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) {
- /* check for P6 processor family */
- if (boot_cpu_data.x86 == 6) {
- return p6_pmu_init();
- } else {
+ switch (boot_cpu_data.x86) {
+ case 0x6:
+ return p6_pmu_init();
+ case 0xf:
+ return p4_pmu_init();
+ }
return -ENODEV;
- }
}

/*
@@ -2725,7 +3095,7 @@ static int validate_group(struct perf_ev

fake_cpuc->n_events = n;

- ret = x86_schedule_events(fake_cpuc, n, NULL);
+ ret = x86_pmu.schedule_events(fake_cpuc, n, NULL);

out_free:
kfree(fake_cpuc);

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  Last update: 2010-02-08 19:47    [from the cache]
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