DM: add function of get px count and data

The px count and data is per-cpu so we should query them for specific
vm and specific vcpu, for px data we need to specify px num also.

Signed-off-by: Victor Sun <victor.sun@intel.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>

devicemodel/Makefile

@@ -78,6 +78,7 @@ SRCS += hw/pci/virtio/virtio_hyper_dmabuf.c
 SRCS += hw/pci/irq.c
 SRCS += hw/pci/uart.c
 SRCS += hw/acpi/acpi.c
+SRCS += hw/acpi/acpi_pm.c
 
 # core
 #SRCS += core/bootrom.c

devicemodel/hw/acpi/acpi_pm.c

@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. 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 <string.h>
+#include <stdbool.h>
+
+#include "vmm.h"
+#include "vmmapi.h"
+#include "dm.h"
+#include "acpi.h"
+
+uint8_t get_vcpu_px_cnt(struct vmctx *ctx, int vcpu_id)
+{
+	uint64_t pm_ioctl_buf = 0;
+	enum pm_cmd_type cmd_type = PMCMD_GET_PX_CNT;
+
+	pm_ioctl_buf = ((ctx->vmid << PMCMD_VMID_SHIFT) & PMCMD_VMID_MASK)
+			| ((vcpu_id << PMCMD_VCPUID_SHIFT) & PMCMD_VCPUID_MASK)
+			| cmd_type;
+
+	if (vm_get_cpu_state(ctx, &pm_ioctl_buf)) {
+		return 0;
+	}
+
+	return (uint8_t)pm_ioctl_buf;
+}
+
+int get_vcpu_px_data(struct vmctx *ctx, int vcpu_id,
+			int px_num, struct cpu_px_data *vcpu_px_data)
+{
+	uint64_t *pm_ioctl_buf;
+	enum pm_cmd_type cmd_type = PMCMD_GET_PX_DATA;
+
+	pm_ioctl_buf = malloc(sizeof(struct cpu_px_data));
+	if (!pm_ioctl_buf) {
+		return -1;
+	}
+
+	*pm_ioctl_buf = ((ctx->vmid << PMCMD_VMID_SHIFT) & PMCMD_VMID_MASK)
+		| ((vcpu_id << PMCMD_VCPUID_SHIFT) & PMCMD_VCPUID_MASK)
+		| ((px_num << PMCMD_STATE_NUM_SHIFT) & PMCMD_STATE_NUM_MASK)
+		| cmd_type;
+
+	/* get and validate px data */
+	if (vm_get_cpu_state(ctx, pm_ioctl_buf)) {
+		free(pm_ioctl_buf);
+		return -1;
+	}
+
+	memcpy(vcpu_px_data, pm_ioctl_buf,
+			sizeof(struct cpu_px_data));
+
+	free(pm_ioctl_buf);
+	return 0;
+}