hv: Boot multiple OS for Partitioning mode ACRN

ACRN in partitioning mode boots multiple OS. Adding code to parse
VM description structure and a reference description structure for
booting 2 OSes.

Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>

Author: Sainath Grandhi

hypervisor/arch/x86/cpu.c

@@ -639,6 +639,10 @@ static void cpu_secondary_post(void)
 
 	exec_vmxon_instr(get_cpu_id());
 
+#ifdef CONFIG_PARTITION_MODE
+	prepare_vm(get_cpu_id());
+#endif
+
 	default_idle();
 
 	/* Control will only come here for secondary

hypervisor/arch/x86/guest/vm.c

@@ -404,6 +404,40 @@ void resume_vm_from_s3(struct vm *vm, uint32_t wakeup_vec)
 	schedule_vcpu(bsp);
 }
 
+#ifdef CONFIG_PARTITION_MODE
+/* Create vm/vcpu for vm */
+int prepare_vm(uint16_t pcpu_id)
+{
+	int ret = 0;
+	uint16_t i;
+	struct vm *vm = NULL;
+	const struct vm_description *vm_desc = NULL;
+	bool is_vm_bsp;
+
+	vm_desc = pcpu_vm_desc_map[pcpu_id].vm_desc_ptr;
+	is_vm_bsp = pcpu_vm_desc_map[pcpu_id].is_bsp;
+
+	if (is_vm_bsp) {
+		ret = create_vm(vm_desc, &vm);
+		ASSERT(ret == 0, "VM creation failed!");
+
+		prepare_vcpu(vm, vm_desc->vm_pcpu_ids[0]);
+
+		/* Prepare the AP for vm */
+		for (i = 1U; i < vm_desc->vm_hw_num_cores; i++)
+			prepare_vcpu(vm, vm_desc->vm_pcpu_ids[i]);
+
+		/* start vm BSP automatically */
+		start_vm(vm);
+
+		pr_acrnlog("Start VM%x", vm_desc->vm_id);
+	}
+
+	return ret;
+}
+
+#else
+
 /* Create vm/vcpu for vm0 */
 int prepare_vm0(void)
 {
@@ -448,6 +482,7 @@ int prepare_vm(uint16_t pcpu_id)
 
 	return err;
 }
+#endif
 
 #ifdef CONFIG_VM0_DESC
 static inline bool vcpu_in_vm_desc(struct vcpu *vcpu,

hypervisor/bsp/sbl/vm_description.c

@@ -6,7 +6,7 @@
 
 #include <hypervisor.h>
 
-#ifdef CONFIG_VM0_DESC
+#if defined(CONFIG_VM0_DESC) && !defined(CONFIG_PARTITION_MODE)
 
 /* Number of CPUs in VM0 */
 #define VM0_NUM_CPUS    1
@@ -24,3 +24,79 @@ struct vm_description vm0_desc = {
 struct vm_description vm0_desc;
 
 #endif // CONFIG_VM0_DESC
+
+#ifdef CONFIG_PARTITION_MODE
+
+#define NUM_USER_VMS    2U
+
+/**********************/
+/* VIRTUAL MACHINE 0 */
+/*********************/
+
+/* Number of CPUs in this VM*/
+#define VM1_NUM_CPUS    2U
+
+/* Logical CPU IDs assigned to this VM */
+int VM1_CPUS[VM1_NUM_CPUS] = {0U, 2U};
+
+/*********************/
+/* VIRTUAL MACHINE 1 */
+/*********************/
+
+/* Number of CPUs in this VM*/
+#define VM2_NUM_CPUS    2U
+
+/* Logical CPU IDs assigned with this VM */
+int VM2_CPUS[VM2_NUM_CPUS] = {3U, 1U};
+
+
+/*******************************/
+/* User Defined VM definitions */
+/*******************************/
+const struct vm_description_array vm_desc_mrb = {
+		/* Number of user virtual machines */
+		.num_vm_desc = NUM_USER_VMS,
+
+		/* Virtual Machine descriptions */
+		.vm_desc_array = {
+			{
+				/* Internal variable, MUSTBE init to -1 */
+				.vm_hw_num_cores = VM1_NUM_CPUS,
+				.vm_pcpu_ids = &VM1_CPUS[0],
+				.vm_id = 1U,
+				.bootargs = "root=/dev/sda rw rootwait noxsave maxcpus=2 nohpet console=hvc0 \
+						console=ttyS0 no_timer_check ignore_loglevel log_buf_len=16M \
+						consoleblank=0 tsc=reliable"
+			},
+
+			{
+				/* Internal variable, MUSTBE init to -1 */
+				.vm_hw_num_cores = VM2_NUM_CPUS,
+				.vm_pcpu_ids = &VM2_CPUS[0],
+				.vm_id = 2U,
+				.bootargs = "root=/dev/sda rw rootwait noxsave maxcpus=2 nohpet console=hvc0 \
+						console=ttyS0 no_timer_check ignore_loglevel log_buf_len=16M \
+						consoleblank=0 tsc=reliable"
+			},
+		}
+};
+
+const struct pcpu_vm_desc_mapping pcpu_vm_desc_map[] = {
+	{
+		.vm_desc_ptr = &vm_desc_mrb.vm_desc_array[0],
+		.is_bsp = true,
+	},
+	{
+		.vm_desc_ptr = &vm_desc_mrb.vm_desc_array[1],
+		.is_bsp = false,
+	},
+	{
+		.vm_desc_ptr = &vm_desc_mrb.vm_desc_array[0],
+		.is_bsp = false,
+	},
+	{
+		.vm_desc_ptr = &vm_desc_mrb.vm_desc_array[1],
+		.is_bsp = true,
+	},
+};
+#endif

hypervisor/include/arch/x86/guest/vm.h

@@ -170,7 +170,9 @@ struct vm_description {
 	/* Whether secure world is enabled for current VM. */
 	bool                   sworld_enabled;
 #ifdef CONFIG_PARTITION_MODE
+	uint8_t			vm_id;
 	struct mptable_info	*mptable;
+	const char		*bootargs;
 #endif
 };
 
@@ -191,4 +193,16 @@ struct vm *get_vm_from_vmid(uint16_t vm_id);
 extern struct list_head vm_list;
 extern spinlock_t vm_list_lock;
 
+#ifdef CONFIG_PARTITION_MODE
+struct vm_description_array {
+	int                     num_vm_desc;
+	const struct vm_description   vm_desc_array[];
+};
+
+struct pcpu_vm_desc_mapping {
+	const struct vm_descriptin *vm_desc_ptr;
+	bool is_bsp;
+};
+extern const struct pcpu_vm_desc_mapping pcpu_vm_desc_map[];
+#endif
 #endif /* VM_H_ */