v4.19.13 snapshot.
diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
new file mode 100644
index 0000000..bf094c5
--- /dev/null
+++ b/arch/powerpc/oprofile/common.c
@@ -0,0 +1,247 @@
+/*
+ * PPC 64 oprofile support:
+ * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
+ * PPC 32 oprofile support: (based on PPC 64 support)
+ * Copyright (C) Freescale Semiconductor, Inc 2004
+ * Author: Andy Fleming
+ *
+ * Based on alpha version.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/oprofile.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/errno.h>
+#include <asm/ptrace.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. */
+ op_per_cpu_rc = model->reg_setup(ctr, &sys, model->num_counters);
+
+ 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)
+{
+ release_pmc_hardware();
+}
+
+static void op_powerpc_cpu_start(void *dummy)
+{
+ /* 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)
+{
+ 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)
+{
+ model->stop();
+}
+
+static void op_powerpc_stop(void)
+{
+ 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 dentry *root)
+{
+ int i;
+
+#ifdef CONFIG_PPC64
+ /*
+ * There is one mmcr0, mmcr1 and mmcra for setting the events for
+ * all of the counters.
+ */
+ 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[4];
+
+ snprintf(buf, sizeof buf, "%d", i);
+ 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);
+
+ /*
+ * 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.
+ */
+ 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(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;
+
+ return 0;
+}
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+ if (!cur_cpu_spec->oprofile_cpu_type)
+ return -ENODEV;
+
+ 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_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;
+ }
+
+ model->num_counters = cur_cpu_spec->num_pmcs;
+
+ ops->cpu_type = cur_cpu_spec->oprofile_cpu_type;
+ 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_DEBUG "oprofile: using %s performance monitoring.\n",
+ ops->cpu_type);
+
+ return 0;
+}
+
+void oprofile_arch_exit(void)
+{
+}