135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#include <errno.h>
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#include <string.h>
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#include <rte_log.h>
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#include "guest_channel.h"
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#include "channel_commands.h"
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#include "power_kvm_vm.h"
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#include "power_common.h"
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#define FD_PATH "/dev/virtio-ports/virtio.serial.port.poweragent"
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static struct channel_packet pkt[CHANNEL_CMDS_MAX_VM_CHANNELS];
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int
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power_kvm_vm_init(unsigned int lcore_id)
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{
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if (lcore_id >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
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RTE_LOG(ERR, POWER, "Core(%u) is out of range 0...%d\n",
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lcore_id, CHANNEL_CMDS_MAX_VM_CHANNELS-1);
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return -1;
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}
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pkt[lcore_id].command = CPU_POWER;
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pkt[lcore_id].resource_id = lcore_id;
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return guest_channel_host_connect(FD_PATH, lcore_id);
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}
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int
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power_kvm_vm_exit(unsigned int lcore_id)
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{
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guest_channel_host_disconnect(lcore_id);
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return 0;
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}
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uint32_t
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power_kvm_vm_freqs(__attribute__((unused)) unsigned int lcore_id,
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__attribute__((unused)) uint32_t *freqs,
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__attribute__((unused)) uint32_t num)
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{
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RTE_LOG(ERR, POWER, "rte_power_freqs is not implemented "
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"for Virtual Machine Power Management\n");
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return -ENOTSUP;
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}
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uint32_t
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power_kvm_vm_get_freq(__attribute__((unused)) unsigned int lcore_id)
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{
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RTE_LOG(ERR, POWER, "rte_power_get_freq is not implemented "
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"for Virtual Machine Power Management\n");
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return -ENOTSUP;
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}
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int
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power_kvm_vm_set_freq(__attribute__((unused)) unsigned int lcore_id,
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__attribute__((unused)) uint32_t index)
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{
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RTE_LOG(ERR, POWER, "rte_power_set_freq is not implemented "
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"for Virtual Machine Power Management\n");
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return -ENOTSUP;
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}
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static inline int
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send_msg(unsigned int lcore_id, uint32_t scale_direction)
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{
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int ret;
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if (lcore_id >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
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RTE_LOG(ERR, POWER, "Core(%u) is out of range 0...%d\n",
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lcore_id, CHANNEL_CMDS_MAX_VM_CHANNELS-1);
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return -1;
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}
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pkt[lcore_id].unit = scale_direction;
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ret = guest_channel_send_msg(&pkt[lcore_id], lcore_id);
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if (ret == 0)
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return 1;
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RTE_LOG(DEBUG, POWER, "Error sending message: %s\n",
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ret > 0 ? strerror(ret) : "channel not connected");
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return -1;
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}
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int
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power_kvm_vm_freq_up(unsigned int lcore_id)
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{
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return send_msg(lcore_id, CPU_POWER_SCALE_UP);
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}
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int
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power_kvm_vm_freq_down(unsigned int lcore_id)
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{
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return send_msg(lcore_id, CPU_POWER_SCALE_DOWN);
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}
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int
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power_kvm_vm_freq_max(unsigned int lcore_id)
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{
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return send_msg(lcore_id, CPU_POWER_SCALE_MAX);
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}
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int
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power_kvm_vm_freq_min(unsigned int lcore_id)
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{
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return send_msg(lcore_id, CPU_POWER_SCALE_MIN);
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}
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int
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power_kvm_vm_turbo_status(__attribute__((unused)) unsigned int lcore_id)
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{
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RTE_LOG(ERR, POWER, "rte_power_turbo_status is not implemented for Virtual Machine Power Management\n");
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return -ENOTSUP;
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}
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int
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power_kvm_vm_enable_turbo(unsigned int lcore_id)
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{
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return send_msg(lcore_id, CPU_POWER_ENABLE_TURBO);
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}
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int
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power_kvm_vm_disable_turbo(unsigned int lcore_id)
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{
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return send_msg(lcore_id, CPU_POWER_DISABLE_TURBO);
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}
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struct rte_power_core_capabilities;
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int power_kvm_vm_get_capabilities(__rte_unused unsigned int lcore_id,
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__rte_unused struct rte_power_core_capabilities *caps)
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{
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RTE_LOG(ERR, POWER, "rte_power_get_capabilities is not implemented for Virtual Machine Power Management\n");
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return -ENOTSUP;
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}
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