From bea24fa2b3a8159a8e4d572f8f5318dfc35adf21 Mon Sep 17 00:00:00 2001
From: Madhusudan Bhat <mbhat@netlogicmicro.com>
Date: Wed, 31 Oct 2012 12:01:27 +0000
Subject: [PATCH] --- yaml --- r: 344134 b: refs/heads/master c:
 c783390a0ecef08df5c804f8c5f647431a04f502 h: refs/heads/master v: v3

---
 [refs]                                     |  2 +-
 trunk/arch/mips/oprofile/Makefile          |  1 +
 trunk/arch/mips/oprofile/common.c          |  1 +
 trunk/arch/mips/oprofile/op_model_mipsxx.c | 29 ++++++++++++++++++++++
 4 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index e17d805ba240..7bc96d343920 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e7e333cb22e5e34e7a0792f262df52026815662e
+refs/heads/master: c783390a0ecef08df5c804f8c5f647431a04f502
diff --git a/trunk/arch/mips/oprofile/Makefile b/trunk/arch/mips/oprofile/Makefile
index 1208c280f77d..65f5237ec821 100644
--- a/trunk/arch/mips/oprofile/Makefile
+++ b/trunk/arch/mips/oprofile/Makefile
@@ -12,5 +12,6 @@ oprofile-$(CONFIG_CPU_MIPS32)		+= op_model_mipsxx.o
 oprofile-$(CONFIG_CPU_MIPS64)		+= op_model_mipsxx.o
 oprofile-$(CONFIG_CPU_R10000)		+= op_model_mipsxx.o
 oprofile-$(CONFIG_CPU_SB1)		+= op_model_mipsxx.o
+oprofile-$(CONFIG_CPU_XLR)		+= op_model_mipsxx.o
 oprofile-$(CONFIG_CPU_RM9000)		+= op_model_rm9000.o
 oprofile-$(CONFIG_CPU_LOONGSON2)	+= op_model_loongson2.o
diff --git a/trunk/arch/mips/oprofile/common.c b/trunk/arch/mips/oprofile/common.c
index f80480a5a032..abd5a02f47cf 100644
--- a/trunk/arch/mips/oprofile/common.c
+++ b/trunk/arch/mips/oprofile/common.c
@@ -91,6 +91,7 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
 	case CPU_R10000:
 	case CPU_R12000:
 	case CPU_R14000:
+	case CPU_XLR:
 		lmodel = &op_model_mipsxx_ops;
 		break;
 
diff --git a/trunk/arch/mips/oprofile/op_model_mipsxx.c b/trunk/arch/mips/oprofile/op_model_mipsxx.c
index 28ea1a4cc576..786254630403 100644
--- a/trunk/arch/mips/oprofile/op_model_mipsxx.c
+++ b/trunk/arch/mips/oprofile/op_model_mipsxx.c
@@ -31,8 +31,22 @@
 
 #define M_COUNTER_OVERFLOW		(1UL      << 31)
 
+/* Netlogic XLR specific, count events in all threads in a core */
+#define M_PERFCTL_COUNT_ALL_THREADS	(1UL      << 13)
+
 static int (*save_perf_irq)(void);
 
+/*
+ * XLR has only one set of counters per core. Designate the
+ * first hardware thread in the core for setup and init.
+ * Skip CPUs with non-zero hardware thread id (4 hwt per core)
+ */
+#ifdef CONFIG_CPU_XLR
+#define oprofile_skip_cpu(c)	((cpu_logical_map(c) & 0x3) != 0)
+#else
+#define oprofile_skip_cpu(c)	0
+#endif
+
 #ifdef CONFIG_MIPS_MT_SMP
 static int cpu_has_mipsmt_pertccounters;
 #define WHAT		(M_TC_EN_VPE | \
@@ -152,6 +166,8 @@ static void mipsxx_reg_setup(struct op_counter_config *ctr)
 			reg.control[i] |= M_PERFCTL_USER;
 		if (ctr[i].exl)
 			reg.control[i] |= M_PERFCTL_EXL;
+		if (current_cpu_type() == CPU_XLR)
+			reg.control[i] |= M_PERFCTL_COUNT_ALL_THREADS;
 		reg.counter[i] = 0x80000000 - ctr[i].count;
 	}
 }
@@ -162,6 +178,9 @@ static void mipsxx_cpu_setup(void *args)
 {
 	unsigned int counters = op_model_mipsxx_ops.num_counters;
 
+	if (oprofile_skip_cpu(smp_processor_id()))
+		return;
+
 	switch (counters) {
 	case 4:
 		w_c0_perfctrl3(0);
@@ -183,6 +202,9 @@ static void mipsxx_cpu_start(void *args)
 {
 	unsigned int counters = op_model_mipsxx_ops.num_counters;
 
+	if (oprofile_skip_cpu(smp_processor_id()))
+		return;
+
 	switch (counters) {
 	case 4:
 		w_c0_perfctrl3(WHAT | reg.control[3]);
@@ -200,6 +222,9 @@ static void mipsxx_cpu_stop(void *args)
 {
 	unsigned int counters = op_model_mipsxx_ops.num_counters;
 
+	if (oprofile_skip_cpu(smp_processor_id()))
+		return;
+
 	switch (counters) {
 	case 4:
 		w_c0_perfctrl3(0);
@@ -372,6 +397,10 @@ static int __init mipsxx_init(void)
 		op_model_mipsxx_ops.cpu_type = "mips/loongson1";
 		break;
 
+	case CPU_XLR:
+		op_model_mipsxx_ops.cpu_type = "mips/xlr";
+		break;
+
 	default:
 		printk(KERN_ERR "Profiling unsupported for this CPU\n");