1 files changed, 134 insertions, 79 deletions

diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
index af2c05d20ba..c77348c5d46 100644
--- a/arch/powerpc/oprofile/common.c
+++ b/arch/powerpc/oprofile/common.c
@@ -14,55 +14,64 @@
  */
 
 #include <linux/oprofile.h>
-#ifndef __powerpc64__
-#include <linux/slab.h>
-#endif /* ! __powerpc64__ */
 #include <linux/init.h>
 #include <linux/smp.h>
 #include <linux/errno.h>
 #include <asm/ptrace.h>
-#include <asm/system.h>
 #include <asm/pmc.h>
 #include <asm/cputable.h>
 #include <asm/oprofile_impl.h>
+#include <asm/firmware.h>
 
 static struct op_powerpc_model *model;
 
 static struct op_counter_config ctr[OP_MAX_COUNTER];
 static struct op_system_config sys;
 
-#ifndef __powerpc64__
-static char *cpu_type;
-#endif /* ! __powerpc64__ */
+static int op_per_cpu_rc;
 
 static void op_handle_interrupt(struct pt_regs *regs)
 {
 	model->handle_interrupt(regs, ctr);
 }
 
+static void op_powerpc_cpu_setup(void *dummy)
+{
+	int ret;
+
+	ret = model->cpu_setup(ctr);
+
+	if (ret != 0)
+		op_per_cpu_rc = ret;
+}
+
 static int op_powerpc_setup(void)
 {
 	int err;
 
+	op_per_cpu_rc = 0;
+
 	/* Grab the hardware */
 	err = reserve_pmc_hardware(op_handle_interrupt);
 	if (err)
 		return err;
 
 	/* Pre-compute the values to stuff in the hardware registers.  */
-	model->reg_setup(ctr, &sys, model->num_counters);
-
-	/* Configure the registers on all cpus.  */
-#ifdef __powerpc64__
-	on_each_cpu(model->cpu_setup, NULL, 0, 1);
-#else /* __powerpc64__ */
-#if 0
-	/* FIXME: Make multi-cpu work */
-	on_each_cpu(model->reg_setup, NULL, 0, 1);
-#endif
-#endif /* __powerpc64__ */
+	op_per_cpu_rc = model->reg_setup(ctr, &sys, model->num_counters);
 
-	return 0;
+	if (op_per_cpu_rc)
+		goto out;
+
+	/* Configure the registers on all cpus.	 If an error occurs on one
+	 * of the cpus, op_per_cpu_rc will be set to the error */
+	on_each_cpu(op_powerpc_cpu_setup, NULL, 1);
+
+out:	if (op_per_cpu_rc) {
+		/* error on setup release the performance counter hardware */
+		release_pmc_hardware();
+	}
+
+	return op_per_cpu_rc;
 }
 
 static void op_powerpc_shutdown(void)
@@ -72,13 +81,29 @@ static void op_powerpc_shutdown(void)
 
 static void op_powerpc_cpu_start(void *dummy)
 {
-	model->start(ctr);
+	/* If any of the cpus have return an error, set the
+	 * global flag to the error so it can be returned
+	 * to the generic OProfile caller.
+	 */
+	int ret;
+
+	ret = model->start(ctr);
+	if (ret != 0)
+		op_per_cpu_rc = ret;
 }
 
 static int op_powerpc_start(void)
 {
-	on_each_cpu(op_powerpc_cpu_start, NULL, 0, 1);
-	return 0;
+	op_per_cpu_rc = 0;
+
+	if (model->global_start)
+		return model->global_start(ctr);
+	if (model->start) {
+		on_each_cpu(op_powerpc_cpu_start, NULL, 1);
+		return op_per_cpu_rc;
+	}
+	return -EIO; /* No start function is defined for this
+			power architecture */
 }
 
 static inline void op_powerpc_cpu_stop(void *dummy)
@@ -88,99 +113,133 @@ static inline void op_powerpc_cpu_stop(void *dummy)
 
 static void op_powerpc_stop(void)
 {
-	on_each_cpu(op_powerpc_cpu_stop, NULL, 0, 1);
+	if (model->stop)
+		on_each_cpu(op_powerpc_cpu_stop, NULL, 1);
+        if (model->global_stop)
+                model->global_stop();
 }
 
-static int op_powerpc_create_files(struct super_block *sb, struct dentry *root)
+static int op_powerpc_create_files(struct dentry *root)
 {
 	int i;
 
-#ifdef __powerpc64__
+#ifdef CONFIG_PPC64
 	/*
 	 * There is one mmcr0, mmcr1 and mmcra for setting the events for
 	 * all of the counters.
 	 */
-	oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0);
-	oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1);
-	oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra);
-#endif /* __powerpc64__ */
+	oprofilefs_create_ulong(root, "mmcr0", &sys.mmcr0);
+	oprofilefs_create_ulong(root, "mmcr1", &sys.mmcr1);
+	oprofilefs_create_ulong(root, "mmcra", &sys.mmcra);
+#ifdef CONFIG_OPROFILE_CELL
+	/* create a file the user tool can check to see what level of profiling
+	 * support exits with this kernel. Initialize bit mask to indicate
+	 * what support the kernel has:
+	 * bit 0      -  Supports SPU event profiling in addition to PPU
+	 *               event and cycles; and SPU cycle profiling
+	 * bits 1-31  -  Currently unused.
+	 *
+	 * If the file does not exist, then the kernel only supports SPU
+	 * cycle profiling, PPU event and cycle profiling.
+	 */
+	oprofilefs_create_ulong(root, "cell_support", &sys.cell_support);
+	sys.cell_support = 0x1; /* Note, the user OProfile tool must check
+				 * that this bit is set before attempting to
+				 * user SPU event profiling.  Older kernels
+				 * will not have this file, hence the user
+				 * tool is not allowed to do SPU event
+				 * profiling on older kernels.  Older kernels
+				 * will accept SPU events but collected data
+				 * is garbage.
+				 */
+#endif
+#endif
 
 	for (i = 0; i < model->num_counters; ++i) {
 		struct dentry *dir;
-		char buf[3];
+		char buf[4];
 
 		snprintf(buf, sizeof buf, "%d", i);
-		dir = oprofilefs_mkdir(sb, root, buf);
+		dir = oprofilefs_mkdir(root, buf);
+
+		oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
+		oprofilefs_create_ulong(dir, "event", &ctr[i].event);
+		oprofilefs_create_ulong(dir, "count", &ctr[i].count);
 
-		oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
-		oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
-		oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
-#ifdef __powerpc64__
 		/*
-		 * We dont support per counter user/kernel selection, but
-		 * we leave the entries because userspace expects them
+		 * Classic PowerPC doesn't support per-counter
+		 * control like this, but the options are
+		 * expected, so they remain.  For Freescale
+		 * Book-E style performance monitors, we do
+		 * support them.
 		 */
-#endif /* __powerpc64__ */
-		oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
-		oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
-
-#ifndef __powerpc64__
-		/* FIXME: Not sure if this is used */
-#endif /* ! __powerpc64__ */
-		oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
+		oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
+		oprofilefs_create_ulong(dir, "user", &ctr[i].user);
+
+		oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
 	}
 
-	oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
-	oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
-#ifdef __powerpc64__
-	oprofilefs_create_ulong(sb, root, "backtrace_spinlocks",
-				&sys.backtrace_spinlocks);
-#endif /* __powerpc64__ */
+	oprofilefs_create_ulong(root, "enable_kernel", &sys.enable_kernel);
+	oprofilefs_create_ulong(root, "enable_user", &sys.enable_user);
 
 	/* Default to tracing both kernel and user */
 	sys.enable_kernel = 1;
 	sys.enable_user = 1;
-#ifdef __powerpc64__
-	/* Turn on backtracing through spinlocks by default */
-	sys.backtrace_spinlocks = 1;
-#endif /* __powerpc64__ */
 
 	return 0;
 }
 
 int __init oprofile_arch_init(struct oprofile_operations *ops)
 {
-#ifndef __powerpc64__
-#ifdef CONFIG_FSL_BOOKE
-	model = &op_model_fsl_booke;
-#else
-	return -ENODEV;
-#endif
-
-	cpu_type = kmalloc(32, GFP_KERNEL);
-	if (NULL == cpu_type)
-		return -ENOMEM;
-
-	sprintf(cpu_type, "ppc/%s", cur_cpu_spec->cpu_name);
+	if (!cur_cpu_spec->oprofile_cpu_type)
+		return -ENODEV;
 
-	model->num_counters = cur_cpu_spec->num_pmcs;
+	switch (cur_cpu_spec->oprofile_type) {
+#ifdef CONFIG_PPC_BOOK3S_64
+#ifdef CONFIG_OPROFILE_CELL
+		case PPC_OPROFILE_CELL:
+			if (firmware_has_feature(FW_FEATURE_LPAR))
+				return -ENODEV;
+			model = &op_model_cell;
+			ops->sync_start = model->sync_start;
+			ops->sync_stop = model->sync_stop;
+			break;
+#endif
+		case PPC_OPROFILE_RS64:
+			model = &op_model_rs64;
+			break;
+		case PPC_OPROFILE_POWER4:
+			model = &op_model_power4;
+			break;
+		case PPC_OPROFILE_PA6T:
+			model = &op_model_pa6t;
+			break;
+#endif
+#ifdef CONFIG_6xx
+		case PPC_OPROFILE_G4:
+			model = &op_model_7450;
+			break;
+#endif
+#if defined(CONFIG_FSL_EMB_PERFMON)
+		case PPC_OPROFILE_FSL_EMB:
+			model = &op_model_fsl_emb;
+			break;
+#endif
+		default:
+			return -ENODEV;
+	}
 
-	ops->cpu_type = cpu_type;
-#else /* __powerpc64__ */
-	if (!cur_cpu_spec->oprofile_model || !cur_cpu_spec->oprofile_cpu_type)
-		return -ENODEV;
-	model = cur_cpu_spec->oprofile_model;
 	model->num_counters = cur_cpu_spec->num_pmcs;
 
 	ops->cpu_type = cur_cpu_spec->oprofile_cpu_type;
-#endif /* __powerpc64__ */
 	ops->create_files = op_powerpc_create_files;
 	ops->setup = op_powerpc_setup;
 	ops->shutdown = op_powerpc_shutdown;
 	ops->start = op_powerpc_start;
 	ops->stop = op_powerpc_stop;
+	ops->backtrace = op_powerpc_backtrace;
 
-	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+	printk(KERN_DEBUG "oprofile: using %s performance monitoring.\n",
 	       ops->cpu_type);
 
 	return 0;
@@ -188,8 +247,4 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
 
 void oprofile_arch_exit(void)
 {
-#ifndef __powerpc64__
-	kfree(cpu_type);
-	cpu_type = NULL;
-#endif /* ! __powerpc64__ */
 }