[dpdk-dev] [PATCH v2 02/10] VM Power Management CLI(Host).

[Alan Carew <alan.carew@intel.com>]

The CLI is used for administrating the channel monitor and manager and
manually setting the CPU frequency on the host.

Supports the following commands:
 add_vm [Mul-choice STRING]: add_vm|rm_vm <name>, add a VM for subsequent
  operations with the CLI or remove a previously added VM from the VM Power
  Manager

 rm_vm [Mul-choice STRING]: add_vm|rm_vm <name>, add a VM for subsequent
  operations with the CLI or remove a previously added VM from the VM Power
  Manager

 add_channels [Fixed STRING]: add_channels <vm_name> <list>|all, add
  communication channels for the specified VM, the virtio channels must be
  enabled in the VM configuration(qemu/libvirt) and the associated VM must be
  active. <list> is a comma-separated list of channel numbers to add, using the
  keyword 'all' will attempt to add all channels for the VM

 set_channel_status [Fixed STRING]:
  set_channel_status <vm_name> <list>|all enabled|disabled,  enable or disable
  the communication channels in list(comma-seperated) for the specified VM,
  alternatively list can be replaced with keyword 'all'. Disabled channels will
  still receive packets on the host, however the commands they specify will be
  ignored. Set status to 'enabled' to begin processing requests again.

 show_vm [Fixed STRING]: show_vm <vm_name>, prints the information on the
  specified VM(s), the information lists the number of vCPUS, the pinning to
  pCPU(s) as a bit mask, along with any communication channels associated with
  each VM

 show_cpu_freq_mask [Fixed STRING]: show_cpu_freq_mask <mask>, Get the current
  frequency for each core specified in the mask

 set_cpu_freq_mask [Fixed STRING]: set_cpu_freq <core_mask> <up|down|min|max>,
  Set the current frequency for the cores specified in <core_mask> by scaling
  each up/down/min/max.

 show_cpu_freq [Fixed STRING]: Get the current frequency for the specified core

 set_cpu_freq [Fixed STRING]: set_cpu_freq <core_num> <up|down|min|max>,
  Set the current frequency for the specified core by scaling up/down/min/max

 quit [Fixed STRING]: close the application

Signed-off-by: Alan Carew <alan.carew@intel.com>
---
 examples/vm_power_manager/vm_power_cli.c | 568 +++++++++++++++++++++++++++++++
 examples/vm_power_manager/vm_power_cli.h |  47 +++
 2 files changed, 615 insertions(+)
 create mode 100644 examples/vm_power_manager/vm_power_cli.c
 create mode 100644 examples/vm_power_manager/vm_power_cli.h

diff --git a/examples/vm_power_manager/vm_power_cli.c b/examples/vm_power_manager/vm_power_cli.c
new file mode 100644
index 0000000..33a4bcf
--- /dev/null
+++ b/examples/vm_power_manager/vm_power_cli.c
@@ -0,0 +1,568 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <termios.h>
+#include <errno.h>
+
+#include <cmdline_rdline.h>
+#include <cmdline_parse.h>
+#include <cmdline_parse_string.h>
+#include <cmdline_parse_num.h>
+#include <cmdline_socket.h>
+#include <cmdline.h>
+#include <rte_config.h>
+
+#include "vm_power_cli.h"
+#include "channel_manager.h"
+#include "channel_monitor.h"
+#include "power_manager.h"
+#include "channel_commands.h"
+
+struct cmd_quit_result {
+	cmdline_fixed_string_t quit;
+};
+
+static void cmd_quit_parsed(__attribute__((unused)) void *parsed_result,
+		struct cmdline *cl,
+		__attribute__((unused)) void *data)
+{
+	channel_monitor_exit();
+	channel_manager_exit();
+	power_manager_exit();
+	cmdline_quit(cl);
+}
+
+cmdline_parse_token_string_t cmd_quit_quit =
+	TOKEN_STRING_INITIALIZER(struct cmd_quit_result, quit, "quit");
+
+cmdline_parse_inst_t cmd_quit = {
+	.f = cmd_quit_parsed,  /* function to call */
+	.data = NULL,      /* 2nd arg of func */
+	.help_str = "close the application",
+	.tokens = {        /* token list, NULL terminated */
+		(void *)&cmd_quit_quit,
+		NULL,
+	},
+};
+
+/* *** VM operations *** */
+struct cmd_show_vm_result {
+	cmdline_fixed_string_t show_vm;
+	cmdline_fixed_string_t vm_name;
+};
+
+static void
+cmd_show_vm_parsed(void *parsed_result, struct cmdline *cl,
+		__attribute__((unused)) void *data)
+{
+	struct cmd_show_vm_result *res = parsed_result;
+	struct vm_info info;
+	unsigned i;
+
+	if (get_info_vm(res->vm_name, &info) != 0)
+		return;
+	cmdline_printf(cl, "VM: '%s', status = ", info.name);
+	if (info.status == VM_ACTIVE)
+		cmdline_printf(cl, "ACTIVE\n");
+	else
+		cmdline_printf(cl, "INACTIVE\n");
+	cmdline_printf(cl, "Channels %u\n", info.num_channels);
+	for (i = 0; i < info.num_channels; i++) {
+		cmdline_printf(cl, "  [%u]: %s, status = ", i,
+				info.channels[i].channel_path);
+		switch (info.channels[i].status) {
+		case CHANNEL_CONNECTED:
+			cmdline_printf(cl, "CONNECTED\n");
+			break;
+		case CHANNEL_DISCONNECTED:
+			cmdline_printf(cl, "DISCONNECTED\n");
+			break;
+		case CHANNEL_DISABLED:
+			cmdline_printf(cl, "DISABLED\n");
+			break;
+		case CHANNEL_PROCESSING:
+			cmdline_printf(cl, "PROCESSING\n");
+			break;
+		default:
+			cmdline_printf(cl, "UNKNOWN\n");
+			break;
+		}
+	}
+	cmdline_printf(cl, "Virtual CPU(s): %u\n", info.num_vcpus);
+	for (i = 0; i < info.num_vcpus; i++) {
+		cmdline_printf(cl, "  [%u]: Physical CPU Mask 0x%"PRIx64"\n", i,
+				info.pcpu_mask[i]);
+	}
+}
+
+cmdline_parse_token_string_t cmd_vm_show =
+	TOKEN_STRING_INITIALIZER(struct cmd_show_vm_result,
+				show_vm, "show_vm");
+cmdline_parse_token_string_t cmd_show_vm_name =
+	TOKEN_STRING_INITIALIZER(struct cmd_show_vm_result,
+			vm_name, NULL);
+
+cmdline_parse_inst_t cmd_show_vm_set = {
+	.f = cmd_show_vm_parsed,
+	.data = NULL,
+	.help_str = "show_vm <vm_name>, prints the information on the "
+			"specified VM(s), the information lists the number of vCPUS, the "
+			"pinning to pCPU(s) as a bit mask, along with any communication "
+			"channels associated with each VM",
+	.tokens = {
+		(void *)&cmd_vm_show,
+		(void *)&cmd_show_vm_name,
+		NULL,
+	},
+};
+
+struct cmd_vm_op_result {
+	cmdline_fixed_string_t op_vm;
+	cmdline_fixed_string_t vm_name;
+};
+
+static void
+cmd_vm_op_parsed(void *parsed_result, struct cmdline *cl,
+		__attribute__((unused)) void *data)
+{
+	struct cmd_vm_op_result *res = parsed_result;
+
+	if (!strcmp(res->op_vm, "add_vm")) {
+		if (add_vm(res->vm_name) < 0)
+			cmdline_printf(cl, "Unable to add VM '%s'\n", res->vm_name);
+	} else if (remove_vm(res->vm_name) < 0)
+		cmdline_printf(cl, "Unable to remove VM '%s'\n", res->vm_name);
+}
+
+cmdline_parse_token_string_t cmd_vm_op =
+	TOKEN_STRING_INITIALIZER(struct cmd_vm_op_result,
+			op_vm, "add_vm#rm_vm");
+cmdline_parse_token_string_t cmd_vm_name =
+	TOKEN_STRING_INITIALIZER(struct cmd_vm_op_result,
+			vm_name, NULL);
+
+cmdline_parse_inst_t cmd_vm_op_set = {
+	.f = cmd_vm_op_parsed,
+	.data = NULL,
+	.help_str = "add_vm|rm_vm <name>, add a VM for "
+			"subsequent operations with the CLI or remove a previously added "
+			"VM from the VM Power Manager",
+	.tokens = {
+		(void *)&cmd_vm_op,
+		(void *)&cmd_vm_name,
+	NULL,
+	},
+};
+
+/* *** VM channel operations *** */
+struct cmd_channels_op_result {
+	cmdline_fixed_string_t op;
+	cmdline_fixed_string_t vm_name;
+	cmdline_fixed_string_t channel_list;
+};
+static void
+cmd_channels_op_parsed(void *parsed_result, struct cmdline *cl,
+			__attribute__((unused)) void *data)
+{
+	unsigned num_channels = 0, channel_num, i;
+	int channels_added;
+	unsigned channel_list[MAX_VM_CHANNELS];
+	char *token, *remaining, *tail_ptr;
+	struct cmd_channels_op_result *res = parsed_result;
+
+	if (!strcmp(res->channel_list, "all")) {
+		channels_added = add_all_channels(res->vm_name);
+		cmdline_printf(cl, "Added %d channels for VM '%s'\n",
+				channels_added, res->vm_name);
+		return;
+	}
+
+	remaining = res->channel_list;
+	while (1) {
+		if (remaining == NULL || remaining[0] == '\0')
+			break;
+
+		token = strsep(&remaining, ",");
+		if (token == NULL)
+			break;
+		errno = 0;
+		channel_num = (unsigned)strtol(token, &tail_ptr, 10);
+		if ((errno != 0) || (*tail_ptr != '\0') || tail_ptr == NULL)
+			break;
+
+		if (channel_num == MAX_VM_CHANNELS) {
+			cmdline_printf(cl, "Channel number '%u' exceeds the maximum number "
+					"of allowable channels(%u) for VM '%s'\n", channel_num,
+					MAX_VM_CHANNELS, res->vm_name);
+			return;
+		}
+		channel_list[num_channels++] = channel_num;
+	}
+	for (i = 0; i < num_channels; i++)
+		cmdline_printf(cl, "[%u]: Adding channel %u\n", i, channel_list[i]);
+
+	channels_added = add_channels(res->vm_name, channel_list,
+			num_channels);
+	cmdline_printf(cl, "Enabled %d channels for '%s'\n", channels_added,
+			res->vm_name);
+}
+
+cmdline_parse_token_string_t cmd_channels_op =
+	TOKEN_STRING_INITIALIZER(struct cmd_channels_op_result,
+				op, "add_channels");
+cmdline_parse_token_string_t cmd_channels_vm_name =
+	TOKEN_STRING_INITIALIZER(struct cmd_channels_op_result,
+			vm_name, NULL);
+cmdline_parse_token_string_t cmd_channels_list =
+	TOKEN_STRING_INITIALIZER(struct cmd_channels_op_result,
+			channel_list, NULL);
+
+cmdline_parse_inst_t cmd_channels_op_set = {
+	.f = cmd_channels_op_parsed,
+	.data = NULL,
+	.help_str = "add_channels <vm_name> <list>|all, add "
+			"communication channels for the specified VM, the "
+			"virtio channels must be enabled in the VM "
+			"configuration(qemu/libvirt) and the associated VM must be active. "
+			"<list> is a comma-seperated list of channel numbers to add, using "
+			"the keyword 'all' will attempt to add all channels for the VM",
+	.tokens = {
+		(void *)&cmd_channels_op,
+		(void *)&cmd_channels_vm_name,
+		(void *)&cmd_channels_list,
+		NULL,
+	},
+};
+
+struct cmd_channels_status_op_result {
+	cmdline_fixed_string_t op;
+	cmdline_fixed_string_t vm_name;
+	cmdline_fixed_string_t channel_list;
+	cmdline_fixed_string_t status;
+};
+
+static void
+cmd_channels_status_op_parsed(void *parsed_result, struct cmdline *cl,
+		       __attribute__((unused)) void *data)
+{
+	unsigned num_channels = 0, channel_num;
+	int changed;
+	unsigned channel_list[MAX_VM_CHANNELS];
+	char *token, *remaining, *tail_ptr;
+	struct cmd_channels_status_op_result *res = parsed_result;
+	enum channel_status status;
+
+	if (!strcmp(res->status, "enabled"))
+		status = CHANNEL_CONNECTED;
+	else
+		status = CHANNEL_DISABLED;
+
+	if (!strcmp(res->channel_list, "all")) {
+		changed = set_channel_status_all(res->vm_name, status);
+		cmdline_printf(cl, "Updated status of %d channels "
+				"for VM '%s'\n", changed, res->vm_name);
+		return;
+	}
+	remaining = res->channel_list;
+	while (1) {
+		if (remaining == NULL || remaining[0] == '\0')
+			break;
+		token = strsep(&remaining, ",");
+		if (token == NULL)
+			break;
+		errno = 0;
+		channel_num = (unsigned)strtol(token, &tail_ptr, 10);
+		if ((errno != 0) || (*tail_ptr != '\0') || tail_ptr == NULL)
+			break;
+
+		if (channel_num == MAX_VM_CHANNELS) {
+			cmdline_printf(cl, "%u exceeds the maximum number of allowable "
+					"channels(%u) for VM '%s'\n", channel_num, MAX_VM_CHANNELS,
+					res->vm_name);
+			return;
+		}
+		channel_list[num_channels++] = channel_num;
+	}
+	changed = set_channel_status(res->vm_name, channel_list, num_channels,
+			status);
+	cmdline_printf(cl, "Updated status of %d channels "
+					"for VM '%s'\n", changed, res->vm_name);
+}
+
+cmdline_parse_token_string_t cmd_channels_status_op =
+	TOKEN_STRING_INITIALIZER(struct cmd_channels_status_op_result,
+				op, "set_channel_status");
+cmdline_parse_token_string_t cmd_channels_status_vm_name =
+	TOKEN_STRING_INITIALIZER(struct cmd_channels_status_op_result,
+			vm_name, NULL);
+cmdline_parse_token_string_t cmd_channels_status_list =
+	TOKEN_STRING_INITIALIZER(struct cmd_channels_status_op_result,
+			channel_list, NULL);
+cmdline_parse_token_string_t cmd_channels_status =
+	TOKEN_STRING_INITIALIZER(struct cmd_channels_status_op_result,
+			status, "enabled#disabled");
+
+cmdline_parse_inst_t cmd_channels_status_op_set = {
+	.f = cmd_channels_status_op_parsed,
+	.data = NULL,
+	.help_str = "set_channel_status <vm_name> <list>|all enabled|disabled, "
+			" enable or disable the communication channels in "
+			"list(comma-seperated) for the specified VM, alternatively list can"
+			" be replaced with keyword 'all'. Disabled channels will still "
+			"receive packets on the host, however the commands they specify "
+			"will be ignored. Set status to 'enabled' to begin processing "
+			"requests again.",
+	.tokens = {
+		(void *)&cmd_channels_status_op,
+		(void *)&cmd_channels_status_vm_name,
+		(void *)&cmd_channels_status_list,
+		(void *)&cmd_channels_status,
+		NULL,
+	},
+};
+
+/* *** CPU Frequency operations *** */
+struct cmd_show_cpu_freq_mask_result {
+	cmdline_fixed_string_t show_cpu_freq_mask;
+	uint64_t core_mask;
+};
+
+static void
+cmd_show_cpu_freq_mask_parsed(void *parsed_result, struct cmdline *cl,
+		       __attribute__((unused)) void *data)
+{
+	struct cmd_show_cpu_freq_mask_result *res = parsed_result;
+	unsigned i;
+	uint64_t mask = res->core_mask;
+	uint32_t freq;
+	for (i = 0; mask; mask &= ~(1ULL << i++)) {
+		if ((mask >> i) & 1) {
+			freq = power_manager_get_current_frequency(i);
+			if (freq > 0)
+				cmdline_printf(cl, "Core %u: %"PRId32"\n", i, freq);
+		}
+	}
+}
+
+cmdline_parse_token_string_t cmd_show_cpu_freq_mask =
+	TOKEN_STRING_INITIALIZER(struct cmd_show_cpu_freq_mask_result,
+			show_cpu_freq_mask, "show_cpu_freq_mask");
+cmdline_parse_token_num_t cmd_show_cpu_freq_mask_core_mask =
+	TOKEN_NUM_INITIALIZER(struct cmd_show_cpu_freq_mask_result,
+			core_mask, UINT64);
+
+cmdline_parse_inst_t cmd_show_cpu_freq_mask_set = {
+	.f = cmd_show_cpu_freq_mask_parsed,
+	.data = NULL,
+	.help_str = "show_cpu_freq_mask <mask>, Get the current frequency for each "
+			"core specified in the mask",
+	.tokens = {
+		(void *)&cmd_show_cpu_freq_mask,
+		(void *)&cmd_show_cpu_freq_mask_core_mask,
+		NULL,
+	},
+};
+
+struct cmd_set_cpu_freq_mask_result {
+	cmdline_fixed_string_t set_cpu_freq_mask;
+	uint64_t core_mask;
+	cmdline_fixed_string_t cmd;
+};
+
+static void
+cmd_set_cpu_freq_mask_parsed(void *parsed_result, struct cmdline *cl,
+			__attribute__((unused)) void *data)
+{
+	struct cmd_set_cpu_freq_mask_result *res = parsed_result;
+	int ret = -1;
+
+	if (!strcmp(res->cmd , "up"))
+		ret = power_manager_scale_mask_up(res->core_mask);
+	else if (!strcmp(res->cmd , "down"))
+		ret = power_manager_scale_mask_down(res->core_mask);
+	else if (!strcmp(res->cmd , "min"))
+		ret = power_manager_scale_mask_min(res->core_mask);
+	else if (!strcmp(res->cmd , "max"))
+		ret = power_manager_scale_mask_max(res->core_mask);
+	if (ret != 0) {
+		cmdline_printf(cl, "Error scaling core_mask(0x%"PRIx64") '%s' , not "
+				"all cores specified have been scaled\n",
+				res->core_mask, res->cmd);
+	};
+}
+
+cmdline_parse_token_string_t cmd_set_cpu_freq_mask =
+	TOKEN_STRING_INITIALIZER(struct cmd_set_cpu_freq_mask_result,
+			set_cpu_freq_mask, "set_cpu_freq_mask");
+cmdline_parse_token_num_t cmd_set_cpu_freq_mask_core_mask =
+	TOKEN_NUM_INITIALIZER(struct cmd_set_cpu_freq_mask_result,
+			core_mask, UINT64);
+cmdline_parse_token_string_t cmd_set_cpu_freq_mask_result =
+	TOKEN_STRING_INITIALIZER(struct cmd_set_cpu_freq_mask_result,
+			cmd, "up#down#min#max");
+
+cmdline_parse_inst_t cmd_set_cpu_freq_mask_set = {
+	.f = cmd_set_cpu_freq_mask_parsed,
+	.data = NULL,
+	.help_str = "set_cpu_freq <core_mask> <up|down|min|max>, Set the current "
+			"frequency for the cores specified in <core_mask> by scaling "
+			"each up/down/min/max.",
+	.tokens = {
+		(void *)&cmd_set_cpu_freq_mask,
+		(void *)&cmd_set_cpu_freq_mask_core_mask,
+		(void *)&cmd_set_cpu_freq_mask_result,
+		NULL,
+	},
+};
+
+
+
+struct cmd_show_cpu_freq_result {
+	cmdline_fixed_string_t show_cpu_freq;
+	uint8_t core_num;
+};
+
+static void
+cmd_show_cpu_freq_parsed(void *parsed_result, struct cmdline *cl,
+		       __attribute__((unused)) void *data)
+{
+	struct cmd_show_cpu_freq_result *res = parsed_result;
+	uint32_t curr_freq = power_manager_get_current_frequency(res->core_num);
+	if (curr_freq == 0) {
+		cmdline_printf(cl, "Unable to get frequency for core %u\n",
+				res->core_num);
+		return;
+	}
+	cmdline_printf(cl, "Core %u frequency: %"PRId32"\n", res->core_num,
+			curr_freq);
+}
+
+cmdline_parse_token_string_t cmd_show_cpu_freq =
+	TOKEN_STRING_INITIALIZER(struct cmd_show_cpu_freq_result,
+			show_cpu_freq, "show_cpu_freq");
+
+cmdline_parse_token_num_t cmd_show_cpu_freq_core_num =
+	TOKEN_NUM_INITIALIZER(struct cmd_show_cpu_freq_result,
+			core_num, UINT8);
+
+cmdline_parse_inst_t cmd_show_cpu_freq_set = {
+	.f = cmd_show_cpu_freq_parsed,
+	.data = NULL,
+	.help_str = "Get the current frequency for the specified core",
+	.tokens = {
+		(void *)&cmd_show_cpu_freq,
+		(void *)&cmd_show_cpu_freq_core_num,
+		NULL,
+	},
+};
+
+struct cmd_set_cpu_freq_result {
+	cmdline_fixed_string_t set_cpu_freq;
+	uint8_t core_num;
+	cmdline_fixed_string_t cmd;
+};
+
+static void
+cmd_set_cpu_freq_parsed(void *parsed_result, struct cmdline *cl,
+		       __attribute__((unused)) void *data)
+{
+	int ret = -1;
+	struct cmd_set_cpu_freq_result *res = parsed_result;
+
+	if (!strcmp(res->cmd , "up"))
+		ret = power_manager_scale_core_up(res->core_num);
+	else if (!strcmp(res->cmd , "down"))
+		ret = power_manager_scale_core_down(res->core_num);
+	else if (!strcmp(res->cmd , "min"))
+		ret = power_manager_scale_core_min(res->core_num);
+	else if (!strcmp(res->cmd , "max"))
+		ret = power_manager_scale_core_max(res->core_num);
+	if (ret != 0) {
+		cmdline_printf(cl, "Error scaling core(%u) '%s'\n", res->core_num,
+				res->cmd);
+	}
+}
+
+cmdline_parse_token_string_t cmd_set_cpu_freq =
+	TOKEN_STRING_INITIALIZER(struct cmd_set_cpu_freq_result,
+			set_cpu_freq, "set_cpu_freq");
+cmdline_parse_token_string_t cmd_set_cpu_freq_core_num =
+	TOKEN_NUM_INITIALIZER(struct cmd_set_cpu_freq_result,
+			core_num, UINT8);
+cmdline_parse_token_string_t cmd_set_cpu_freq_cmd_cmd =
+	TOKEN_STRING_INITIALIZER(struct cmd_set_cpu_freq_result,
+			cmd, "up#down#min#max");
+
+cmdline_parse_inst_t cmd_set_cpu_freq_set = {
+	.f = cmd_set_cpu_freq_parsed,
+	.data = NULL,
+	.help_str = "set_cpu_freq <core_num> <up|down|min|max>, Set the current "
+			"frequency for the specified core by scaling up/down/min/max",
+	.tokens = {
+		(void *)&cmd_set_cpu_freq,
+		(void *)&cmd_set_cpu_freq_core_num,
+		(void *)&cmd_set_cpu_freq_cmd_cmd,
+		NULL,
+	},
+};
+
+cmdline_parse_ctx_t main_ctx[] = {
+		(cmdline_parse_inst_t *)&cmd_quit,
+		(cmdline_parse_inst_t *)&cmd_vm_op_set,
+		(cmdline_parse_inst_t *)&cmd_channels_op_set,
+		(cmdline_parse_inst_t *)&cmd_channels_status_op_set,
+		(cmdline_parse_inst_t *)&cmd_show_vm_set,
+		(cmdline_parse_inst_t *)&cmd_show_cpu_freq_mask_set,
+		(cmdline_parse_inst_t *)&cmd_set_cpu_freq_mask_set,
+		(cmdline_parse_inst_t *)&cmd_show_cpu_freq_set,
+		(cmdline_parse_inst_t *)&cmd_set_cpu_freq_set,
+		NULL,
+};
+
+void
+run_cli(__attribute__((unused)) void *arg)
+{
+	struct cmdline *cl;
+	power_manager_init();
+	cl = cmdline_stdin_new(main_ctx, "vmpower> ");
+	if (cl == NULL)
+		return;
+
+	cmdline_interact(cl);
+	cmdline_stdin_exit(cl);
+}
diff --git a/examples/vm_power_manager/vm_power_cli.h b/examples/vm_power_manager/vm_power_cli.h
new file mode 100644
index 0000000..deccd51
--- /dev/null
+++ b/examples/vm_power_manager/vm_power_cli.h
@@ -0,0 +1,47 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef VM_POWER_CLI_H_
+#define VM_POWER_CLI_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void run_cli(__attribute__((unused)) void *arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* VM_POWER_CLI_H_ */
-- 
1.9.3