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ARM: perf: encode PMU name in arm_pmu structure 

Currently, perf uses the PMU ID as an index into a string table
to look up the name of a given PMU.

This patch encodes the name of a PMU directly into the arm_pmu
structure so that PMU-specific code can be factored out into
separate files.

Acked-by: Jamie Iles <jamie@jamieiles.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2010-11-13 18:45:27 +00:00
parent 3cb314bae2
commit 629948310e
1 changed files with 8 additions and 11 deletions
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19
arch/arm/kernel/perf_event.c
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@ -69,18 +69,9 @@ struct cpu_hw_events {
};
DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
/* PMU names. */
static const char *arm_pmu_names[] = {
[ARM_PERF_PMU_ID_XSCALE1] = "xscale1",
[ARM_PERF_PMU_ID_XSCALE2] = "xscale2",
[ARM_PERF_PMU_ID_V6] = "v6",
[ARM_PERF_PMU_ID_V6MP] = "v6mpcore",
[ARM_PERF_PMU_ID_CA8] = "ARMv7 Cortex-A8",
[ARM_PERF_PMU_ID_CA9] = "ARMv7 Cortex-A9",
};
struct arm_pmu {
enum arm_perf_pmu_ids id;
const char *name;
irqreturn_t (*handle_irq)(int irq_num, void *dev);
void (*enable)(struct hw_perf_event *evt, int idx);
void (*disable)(struct hw_perf_event *evt, int idx);
@ -1225,6 +1216,7 @@ armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc,
static const struct arm_pmu armv6pmu = {
.id = ARM_PERF_PMU_ID_V6,
.name = "v6",
.handle_irq = armv6pmu_handle_irq,
.enable = armv6pmu_enable_event,
.disable = armv6pmu_disable_event,
@ -1254,6 +1246,7 @@ const struct arm_pmu *__init armv6pmu_init(void)
*/
static const struct arm_pmu armv6mpcore_pmu = {
.id = ARM_PERF_PMU_ID_V6MP,
.name = "v6mpcore",
.handle_irq = armv6pmu_handle_irq,
.enable = armv6pmu_enable_event,
.disable = armv6mpcore_pmu_disable_event,
@ -2149,6 +2142,7 @@ static u32 __init armv7_reset_read_pmnc(void)
const struct arm_pmu *__init armv7_a8_pmu_init(void)
{
armv7pmu.id = ARM_PERF_PMU_ID_CA8;
armv7pmu.name = "ARMv7 Cortex-A8";
armv7pmu.cache_map = &armv7_a8_perf_cache_map;
armv7pmu.event_map = &armv7_a8_perf_map;
armv7pmu.num_events = armv7_reset_read_pmnc();
@ -2158,6 +2152,7 @@ const struct arm_pmu *__init armv7_a8_pmu_init(void)
const struct arm_pmu *__init armv7_a9_pmu_init(void)
{
armv7pmu.id = ARM_PERF_PMU_ID_CA9;
armv7pmu.name = "ARMv7 Cortex-A9";
armv7pmu.cache_map = &armv7_a9_perf_cache_map;
armv7pmu.event_map = &armv7_a9_perf_map;
armv7pmu.num_events = armv7_reset_read_pmnc();
@ -2578,6 +2573,7 @@ xscale1pmu_write_counter(int counter, u32 val)
static const struct arm_pmu xscale1pmu = {
.id = ARM_PERF_PMU_ID_XSCALE1,
.name = "xscale1",
.handle_irq = xscale1pmu_handle_irq,
.enable = xscale1pmu_enable_event,
.disable = xscale1pmu_disable_event,
@ -2939,6 +2935,7 @@ xscale2pmu_write_counter(int counter, u32 val)
static const struct arm_pmu xscale2pmu = {
.id = ARM_PERF_PMU_ID_XSCALE2,
.name = "xscale2",
.handle_irq = xscale2pmu_handle_irq,
.enable = xscale2pmu_enable_event,
.disable = xscale2pmu_disable_event,
@ -2999,7 +2996,7 @@ init_hw_perf_events(void)
if (armpmu) {
pr_info("enabled with %s PMU driver, %d counters available\n",
arm_pmu_names[armpmu->id], armpmu->num_events);
armpmu->name, armpmu->num_events);
} else {
pr_info("no hardware support available\n");
}