[PATCH v3 04/13] perf/x86: add index param to get_event_constraint() callback

From: Stephane Eranian
Date: Mon Nov 17 2014 - 14:08:24 EST


This patch adds an index parameter to the get_event_constraint()
x86_pmu callback. It is expected to represent the index of the
event in the cpuc->event_list[] array. When the callback is used
for fake_cpuc (evnet validation), then the index must be -1. The
motivation for passing the index is to use it to index into another
cpuc array.

Signed-off-by: Stephane Eranian <eranian@xxxxxxxxxx>
---
arch/x86/kernel/cpu/perf_event.c | 4 ++--
arch/x86/kernel/cpu/perf_event.h | 4 +++-
arch/x86/kernel/cpu/perf_event_amd.c | 6 ++++--
arch/x86/kernel/cpu/perf_event_intel.c | 15 ++++++++++-----
4 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 570e99b..422a423 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -734,7 +734,7 @@ int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)

for (i = 0, wmin = X86_PMC_IDX_MAX, wmax = 0; i < n; i++) {
hwc = &cpuc->event_list[i]->hw;
- c = x86_pmu.get_event_constraints(cpuc, cpuc->event_list[i]);
+ c = x86_pmu.get_event_constraints(cpuc, i, cpuc->event_list[i]);
hwc->constraint = c;

wmin = min(wmin, c->weight);
@@ -1723,7 +1723,7 @@ static int validate_event(struct perf_event *event)
if (IS_ERR(fake_cpuc))
return PTR_ERR(fake_cpuc);

- c = x86_pmu.get_event_constraints(fake_cpuc, event);
+ c = x86_pmu.get_event_constraints(fake_cpuc, -1, event);

if (!c || !c->weight)
ret = -EINVAL;
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h
index 641b2df..141c17c 100644
--- a/arch/x86/kernel/cpu/perf_event.h
+++ b/arch/x86/kernel/cpu/perf_event.h
@@ -447,6 +447,7 @@ struct x86_pmu {
u64 max_period;
struct event_constraint *
(*get_event_constraints)(struct cpu_hw_events *cpuc,
+ int idx,
struct perf_event *event);

void (*put_event_constraints)(struct cpu_hw_events *cpuc,
@@ -693,7 +694,8 @@ static inline int amd_pmu_init(void)
int intel_pmu_save_and_restart(struct perf_event *event);

struct event_constraint *
-x86_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event);
+x86_get_event_constraints(struct cpu_hw_events *cpuc, int idx,
+ struct perf_event *event);

struct intel_shared_regs *allocate_shared_regs(int cpu);

diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index e4302b8..1cee5d2 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -430,7 +430,8 @@ static void amd_pmu_cpu_dead(int cpu)
}

static struct event_constraint *
-amd_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
+amd_get_event_constraints(struct cpu_hw_events *cpuc, int idx,
+ struct perf_event *event)
{
/*
* if not NB event or no NB, then no constraints
@@ -538,7 +539,8 @@ static struct event_constraint amd_f15_PMC50 = EVENT_CONSTRAINT(0, 0x3F, 0);
static struct event_constraint amd_f15_PMC53 = EVENT_CONSTRAINT(0, 0x38, 0);

static struct event_constraint *
-amd_get_event_constraints_f15h(struct cpu_hw_events *cpuc, struct perf_event *event)
+amd_get_event_constraints_f15h(struct cpu_hw_events *cpuc, int idx,
+ struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
unsigned int event_code = amd_get_event_code(hwc);
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 9345194..9b60b17 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1624,7 +1624,8 @@ intel_shared_regs_constraints(struct cpu_hw_events *cpuc,
}

struct event_constraint *
-x86_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
+x86_get_event_constraints(struct cpu_hw_events *cpuc, int idx,
+ struct perf_event *event)
{
struct event_constraint *c;

@@ -1641,7 +1642,8 @@ x86_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
}

static struct event_constraint *
-intel_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
+intel_get_event_constraints(struct cpu_hw_events *cpuc, int idx,
+ struct perf_event *event)
{
struct event_constraint *c;

@@ -1657,7 +1659,7 @@ intel_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event
if (c)
return c;

- return x86_get_event_constraints(cpuc, event);
+ return x86_get_event_constraints(cpuc, idx, event);
}

static void
@@ -1891,9 +1893,12 @@ static struct event_constraint counter2_constraint =
EVENT_CONSTRAINT(0, 0x4, 0);

static struct event_constraint *
-hsw_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
+hsw_get_event_constraints(struct cpu_hw_events *cpuc, int idx,
+ struct perf_event *event)
{
- struct event_constraint *c = intel_get_event_constraints(cpuc, event);
+ struct event_constraint *c;
+
+ c = intel_get_event_constraints(cpuc, idx, event);

/* Handle special quirk on in_tx_checkpointed only in counter 2 */
if (event->hw.config & HSW_IN_TX_CHECKPOINTED) {
--
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/