1 files changed, 126 insertions, 0 deletions
diff --git a/lib/librte_power/power_kvm_vm.c b/lib/librte_power/power_kvm_vm.c
new file mode 100644
index 00000000..38e9066f
--- /dev/null
+++ b/lib/librte_power/power_kvm_vm.c
@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
+ */
+#include <errno.h>
+#include <string.h>
+
+#include <rte_log.h>
+
+#include "guest_channel.h"
+#include "channel_commands.h"
+#include "power_kvm_vm.h"
+#include "power_common.h"
+
+#define FD_PATH "/dev/virtio-ports/virtio.serial.port.poweragent"
+
+static struct channel_packet pkt[CHANNEL_CMDS_MAX_VM_CHANNELS];
+
+
+int
+power_kvm_vm_init(unsigned int lcore_id)
+{
+	if (lcore_id >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
+		RTE_LOG(ERR, POWER, "Core(%u) is out of range 0...%d\n",
+				lcore_id, CHANNEL_CMDS_MAX_VM_CHANNELS-1);
+		return -1;
+	}
+	pkt[lcore_id].command = CPU_POWER;
+	pkt[lcore_id].resource_id = lcore_id;
+	return guest_channel_host_connect(FD_PATH, lcore_id);
+}
+
+int
+power_kvm_vm_exit(unsigned int lcore_id)
+{
+	guest_channel_host_disconnect(lcore_id);
+	return 0;
+}
+
+uint32_t
+power_kvm_vm_freqs(__attribute__((unused)) unsigned int lcore_id,
+		__attribute__((unused)) uint32_t *freqs,
+		__attribute__((unused)) uint32_t num)
+{
+	RTE_LOG(ERR, POWER, "rte_power_freqs is not implemented "
+			"for Virtual Machine Power Management\n");
+	return -ENOTSUP;
+}
+
+uint32_t
+power_kvm_vm_get_freq(__attribute__((unused)) unsigned int lcore_id)
+{
+	RTE_LOG(ERR, POWER, "rte_power_get_freq is not implemented "
+			"for Virtual Machine Power Management\n");
+	return -ENOTSUP;
+}
+
+int
+power_kvm_vm_set_freq(__attribute__((unused)) unsigned int lcore_id,
+		__attribute__((unused)) uint32_t index)
+{
+	RTE_LOG(ERR, POWER, "rte_power_set_freq is not implemented "
+			"for Virtual Machine Power Management\n");
+	return -ENOTSUP;
+}
+
+static inline int
+send_msg(unsigned int lcore_id, uint32_t scale_direction)
+{
+	int ret;
+
+	if (lcore_id >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
+		RTE_LOG(ERR, POWER, "Core(%u) is out of range 0...%d\n",
+				lcore_id, CHANNEL_CMDS_MAX_VM_CHANNELS-1);
+		return -1;
+	}
+	pkt[lcore_id].unit = scale_direction;
+	ret = guest_channel_send_msg(&pkt[lcore_id], lcore_id);
+	if (ret == 0)
+		return 1;
+	RTE_LOG(DEBUG, POWER, "Error sending message: %s\n",
+			ret > 0 ? strerror(ret) : "channel not connected");
+	return -1;
+}
+
+int
+power_kvm_vm_freq_up(unsigned int lcore_id)
+{
+	return send_msg(lcore_id, CPU_POWER_SCALE_UP);
+}
+
+int
+power_kvm_vm_freq_down(unsigned int lcore_id)
+{
+	return send_msg(lcore_id, CPU_POWER_SCALE_DOWN);
+}
+
+int
+power_kvm_vm_freq_max(unsigned int lcore_id)
+{
+	return send_msg(lcore_id, CPU_POWER_SCALE_MAX);
+}
+
+int
+power_kvm_vm_freq_min(unsigned int lcore_id)
+{
+	return send_msg(lcore_id, CPU_POWER_SCALE_MIN);
+}
+
+int
+power_kvm_vm_turbo_status(__attribute__((unused)) unsigned int lcore_id)
+{
+	RTE_LOG(ERR, POWER, "rte_power_turbo_status is not implemented for Virtual Machine Power Management\n");
+	return -ENOTSUP;
+}
+
+int
+power_kvm_vm_enable_turbo(unsigned int lcore_id)
+{
+	return send_msg(lcore_id, CPU_POWER_ENABLE_TURBO);
+}
+
+int
+power_kvm_vm_disable_turbo(unsigned int lcore_id)
+{
+	return send_msg(lcore_id, CPU_POWER_DISABLE_TURBO);
+}