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Diffstat (limited to 'arch/powerpc/oprofile/common.c')
-rw-r--r--arch/powerpc/oprofile/common.c144
1 files changed, 107 insertions, 37 deletions
diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
index cc2535be3a7..c77348c5d46 100644
--- a/arch/powerpc/oprofile/common.c
+++ b/arch/powerpc/oprofile/common.c
@@ -18,37 +18,60 @@
#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;
+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);
+ op_per_cpu_rc = model->reg_setup(ctr, &sys, model->num_counters);
- /* Configure the registers on all cpus. */
- on_each_cpu(model->cpu_setup, NULL, 0, 1);
+ if (op_per_cpu_rc)
+ goto out;
- return 0;
+ /* 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)
@@ -58,13 +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)
@@ -74,10 +113,13 @@ 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;
@@ -86,21 +128,43 @@ static int op_powerpc_create_files(struct super_block *sb, struct dentry *root)
* 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);
+ 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(sb, dir, "enabled", &ctr[i].enabled);
- oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
- oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
+ oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
+ oprofilefs_create_ulong(dir, "event", &ctr[i].event);
+ oprofilefs_create_ulong(dir, "count", &ctr[i].count);
/*
* Classic PowerPC doesn't support per-counter
@@ -109,26 +173,18 @@ static int op_powerpc_create_files(struct super_block *sb, struct dentry *root)
* Book-E style performance monitors, we do
* support them.
*/
- oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
- oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
+ oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
+ oprofilefs_create_ulong(dir, "user", &ctr[i].user);
- oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
+ 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 CONFIG_PPC64
- oprofilefs_create_ulong(sb, root, "backtrace_spinlocks",
- &sys.backtrace_spinlocks);
-#endif
+ 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 CONFIG_PPC64
- /* Turn on backtracing through spinlocks by default */
- sys.backtrace_spinlocks = 1;
-#endif
return 0;
}
@@ -139,21 +195,34 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
return -ENODEV;
switch (cur_cpu_spec->oprofile_type) {
-#ifdef CONFIG_PPC64
+#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;
-#else
+ case PPC_OPROFILE_PA6T:
+ model = &op_model_pa6t;
+ break;
+#endif
+#ifdef CONFIG_6xx
case PPC_OPROFILE_G4:
model = &op_model_7450;
break;
#endif
-#ifdef CONFIG_FSL_BOOKE
- case PPC_OPROFILE_BOOKE:
- model = &op_model_fsl_booke;
+#if defined(CONFIG_FSL_EMB_PERFMON)
+ case PPC_OPROFILE_FSL_EMB:
+ model = &op_model_fsl_emb;
break;
#endif
default:
@@ -168,8 +237,9 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
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;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 17:24:34 +0000