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Date: Fri, 13 Jul 2012 16:44:53 -0400
From: "Al Cooper" <alcooperx@...il.com>
To: ralf@...ux-mips.org, linux-mips@...ux-mips.org,
linux-kernel@...r.kernel.org
cc: "Al Cooper" <alcooperx@...il.com>
Subject: [PATCH 4/5] MIPS: perf: Split the Kconfig option
CONFIG_MIPS_MT_SMP
Split the Kconfig option CONFIG_MIPS_MT_SMP into CONFIG_MIPS_MT_SMP
and CONFIG_MIPS_PERF_SHARED_TC_COUNTERS so some of the code used
for performance counters that are shared between threads can be used
for MIPS cores that are not MT_SMP.
Signed-off-by: Al Cooper <alcooperx@...il.com>
---
arch/mips/Kconfig | 4 ++++
arch/mips/kernel/perf_event_mipsxx.c | 16 ++++++++--------
2 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 61e1459..bced05c 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1898,6 +1898,7 @@ config MIPS_MT_SMP
select SYS_SUPPORTS_SCHED_SMT if SMP
select SYS_SUPPORTS_SMP
select SMP_UP
+ select MIPS_PERF_SHARED_TC_COUNTERS
help
This is a kernel model which is known a VSMP but lately has been
marketesed into SMVP.
@@ -2248,6 +2249,9 @@ config NR_CPUS
performance should round up your number of processors to the next
power of two.
+config MIPS_PERF_SHARED_TC_COUNTERS
+ bool
+
#
# Timer Interrupt Frequency Configuration
#
diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
index 19253d7..cb21308 100644
--- a/arch/mips/kernel/perf_event_mipsxx.c
+++ b/arch/mips/kernel/perf_event_mipsxx.c
@@ -130,7 +130,7 @@ static struct mips_pmu mipspmu;
#define M_PERFCTL_EVENT_MASK 0xfe0
-#ifdef CONFIG_MIPS_MT_SMP
+#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
static int cpu_has_mipsmt_pertccounters;
static DEFINE_RWLOCK(pmuint_rwlock);
@@ -156,10 +156,10 @@ static unsigned int counters_total_to_per_cpu(unsigned int counters)
return counters >> vpe_shift();
}
-#else /* !CONFIG_MIPS_MT_SMP */
+#else /* !CONFIG_MIPS_PERF_SHARED_TC_COUNTERS */
#define vpe_id() 0
-#endif /* CONFIG_MIPS_MT_SMP */
+#endif /* CONFIG_MIPS_PERF_SHARED_TC_COUNTERS */
static void resume_local_counters(void);
static void pause_local_counters(void);
@@ -503,7 +503,7 @@ static void mipspmu_read(struct perf_event *event)
static void mipspmu_enable(struct pmu *pmu)
{
-#ifdef CONFIG_MIPS_MT_SMP
+#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
write_unlock(&pmuint_rwlock);
#endif
resume_local_counters();
@@ -523,7 +523,7 @@ static void mipspmu_enable(struct pmu *pmu)
static void mipspmu_disable(struct pmu *pmu)
{
pause_local_counters();
-#ifdef CONFIG_MIPS_MT_SMP
+#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
write_lock(&pmuint_rwlock);
#endif
}
@@ -1163,7 +1163,7 @@ static int mipsxx_pmu_handle_shared_irq(void)
* See also mipsxx_pmu_start().
*/
pause_local_counters();
-#ifdef CONFIG_MIPS_MT_SMP
+#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
read_lock(&pmuint_rwlock);
#endif
@@ -1195,7 +1195,7 @@ static int mipsxx_pmu_handle_shared_irq(void)
if (handled == IRQ_HANDLED)
irq_work_run();
-#ifdef CONFIG_MIPS_MT_SMP
+#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
read_unlock(&pmuint_rwlock);
#endif
resume_local_counters();
@@ -1362,7 +1362,7 @@ init_hw_perf_events(void)
return -ENODEV;
}
-#ifdef CONFIG_MIPS_MT_SMP
+#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
cpu_has_mipsmt_pertccounters = read_c0_config7() & (1<<19);
if (!cpu_has_mipsmt_pertccounters)
counters = counters_total_to_per_cpu(counters);
--
1.7.6
--
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