hv: sched: Add sched_params struct for thread parameters

Abstract out schedulers config data for vCPU threads and other hypervisor
threads to sched_params structure. And it's used to initialize per
thread scheduler private data. The sched_params for vCPU threads come
from vm_config generated by config tools while other hypervisor threads
need give them explicitly.

Tracked-On: #8500
Signed-off-by: Qiang Zhang <qiang4.zhang@intel.com>

hypervisor/arch/x86/guest/vcpu.c

@@ -986,8 +986,7 @@ int32_t prepare_vcpu(struct acrn_vm *vm, uint16_t pcpu_id)
 		vcpu->thread_obj.host_sp = build_stack_frame(vcpu);
 		vcpu->thread_obj.switch_out = context_switch_out;
 		vcpu->thread_obj.switch_in = context_switch_in;
-		vcpu->thread_obj.priority = get_vm_config(vm->vm_id)->vm_prio;
-		init_thread_data(&vcpu->thread_obj);
+		init_thread_data(&vcpu->thread_obj, &get_vm_config(vm->vm_id)->sched_params);
 		for (i = 0; i < VCPU_EVENT_NUM; i++) {
 			init_event(&vcpu->events[i]);
 		}

hypervisor/common/hv_main.c

@@ -95,6 +95,7 @@ void run_idle_thread(void)
 {
 	uint16_t pcpu_id = get_pcpu_id();
 	struct thread_object *idle = &per_cpu(idle, pcpu_id);
+	struct sched_params idle_params = {0};
 	char idle_name[16];
 
 	snprintf(idle_name, 16U, "idle%hu", pcpu_id);
@@ -103,7 +104,8 @@ void run_idle_thread(void)
 	idle->thread_entry = default_idle;
 	idle->switch_out = NULL;
 	idle->switch_in = NULL;
-	idle->priority = PRIO_IDLE;
+	idle_params.prio = PRIO_IDLE;
+	init_thread_data(idle, &idle_params);
 
 	run_thread(idle);
 

hypervisor/common/sched_bvt.c

@@ -168,7 +168,7 @@ static void sched_bvt_deinit(struct sched_control *ctl)
 	del_timer(&bvt_ctl->tick_timer);
 }
 
-static void sched_bvt_init_data(struct thread_object *obj)
+static void sched_bvt_init_data(struct thread_object *obj, __unused struct sched_params * params)
 {
 	struct sched_bvt_data *data;
 

hypervisor/common/sched_iorr.c

@@ -132,7 +132,7 @@ void sched_iorr_deinit(struct sched_control *ctl)
 	del_timer(&iorr_ctl->tick_timer);
 }
 
-void sched_iorr_init_data(struct thread_object *obj)
+void sched_iorr_init_data(struct thread_object *obj, __unused struct sched_params * params)
 {
 	struct sched_iorr_data *data;
 

hypervisor/common/sched_prio.c

@@ -11,6 +11,7 @@
 struct sched_prio_data {
 	/* keep list as the first item */
 	struct list_head list;
+	int priority;
 };
 
 static int sched_prio_init(struct sched_control *ctl)
@@ -25,12 +26,13 @@ static int sched_prio_init(struct sched_control *ctl)
 	return 0;
 }
 
-static void sched_prio_init_data(struct thread_object *obj)
+static void sched_prio_init_data(struct thread_object *obj, struct sched_params *params)
 {
 	struct sched_prio_data *data;
 
 	data = (struct sched_prio_data *)obj->data;
 	INIT_LIST_HEAD(&data->list);
+	data->priority = params->priority;
 }
 
 static struct thread_object *sched_prio_pick_next(struct sched_control *ctl)
@@ -52,15 +54,15 @@ static void prio_queue_add(struct thread_object *obj)
 	struct sched_prio_control *prio_ctl =
 		(struct sched_prio_control *)obj->sched_ctl->priv;
 	struct sched_prio_data *data = (struct sched_prio_data *)obj->data;
-	struct thread_object *iter_obj;
+	struct sched_prio_data *iter_data;
 	struct list_head *pos;
 
 	if (list_empty(&prio_ctl->prio_queue)) {
 		list_add(&data->list, &prio_ctl->prio_queue);
 	} else {
 		list_for_each(pos, &prio_ctl->prio_queue) {
-			iter_obj = container_of(pos, struct thread_object, data);
-			if (iter_obj->priority < obj->priority) {
+			iter_data = container_of(pos, struct sched_prio_data, list);
+			if (iter_data->priority < data->priority) {
 				list_add_node(&data->list, pos->prev, pos);
 				break;
 			}

hypervisor/common/schedule.c

@@ -98,14 +98,14 @@ void deinit_sched(uint16_t pcpu_id)
 	}
 }
 
-void init_thread_data(struct thread_object *obj)
+void init_thread_data(struct thread_object *obj, struct sched_params *params)
 {
 	struct acrn_scheduler *scheduler = get_scheduler(obj->pcpu_id);
 	uint64_t rflag;
 
 	obtain_schedule_lock(obj->pcpu_id, &rflag);
 	if (scheduler->init_data != NULL) {
-		scheduler->init_data(obj);
+		scheduler->init_data(obj, params);
 	}
 	/* initial as BLOCKED status, so we can wake it up to run */
 	set_thread_status(obj, THREAD_STS_BLOCKED);
@@ -241,7 +241,6 @@ void run_thread(struct thread_object *obj)
 {
 	uint64_t rflag;
 
-	init_thread_data(obj);
 	obtain_schedule_lock(obj->pcpu_id, &rflag);
 	get_cpu_var(sched_ctl).curr_obj = obj;
 	set_thread_status(obj, THREAD_STS_RUNNING);

hypervisor/include/arch/x86/asm/vm_config.h

@@ -15,6 +15,7 @@
 #include <vm_configurations.h>
 #include <asm/sgx.h>
 #include <acrn_hv_defs.h>
+#include <schedule.h>
 
 #define AFFINITY_CPU(n)		(1UL << (n))
 #define MAX_VCPUS_PER_VM	MAX_PCPU_NUM
@@ -170,7 +171,7 @@ struct acrn_vm_config {
 							 *	GUEST_FLAG_LAPIC_PASSTHROUGH
 							 * We could add more guest flags in future;
 							 */
-	uint32_t vm_prio;				/* The priority for VM vCPU scheduling */
+	struct sched_params sched_params;		/* Scheduler params for vCPUs of this VM */
 	uint16_t companion_vm_id;			/* The companion VM id for this VM */
 	struct acrn_vm_mem_config memory;		/* memory configuration of VM */
 	struct epc_section epc;				/* EPC memory configuration of VM */

hypervisor/include/common/schedule.h

@@ -34,6 +34,16 @@ enum thread_priority {
 	PRIO_MAX
 };
 
+/* 
+ * For now, we just have several parameters for all the schedulers. So we
+ * put them together here for simplicity. TODO When this structure grows big
+ * enough, we need to replace it with a union of parameters of different
+ * schedulers.
+ */
+struct sched_params {
+	uint32_t prio;		/* The priority of a thread */
+};
+
 struct thread_object;
 typedef void (*thread_entry_t)(struct thread_object *obj);
 typedef void (*switch_t)(struct thread_object *obj);
@@ -49,8 +59,6 @@ struct thread_object {
 	switch_t switch_out;
 	switch_t switch_in;
 
-	int priority;
-
 	uint8_t data[THREAD_DATA_SIZE];
 };
 
@@ -70,7 +78,7 @@ struct acrn_scheduler {
 	/* init scheduler */
 	int32_t	(*init)(struct sched_control *ctl);
 	/* init private data of scheduler */
-	void	(*init_data)(struct thread_object *obj);
+	void	(*init_data)(struct thread_object *obj, struct sched_params *params);
 	/* pick the next thread object */
 	struct thread_object* (*pick_next)(struct sched_control *ctl);
 	/* put thread object into sleep */
@@ -120,7 +128,7 @@ void deinit_sched(uint16_t pcpu_id);
 void obtain_schedule_lock(uint16_t pcpu_id, uint64_t *rflag);
 void release_schedule_lock(uint16_t pcpu_id, uint64_t rflag);
 
-void init_thread_data(struct thread_object *obj);
+void init_thread_data(struct thread_object *obj, struct sched_params *params);
 void deinit_thread_data(struct thread_object *obj);
 
 void make_reschedule_request(uint16_t pcpu_id);

misc/config_tools/data/generic_board/generic_code/hybrid/vm_configurations.c

@@ -22,7 +22,10 @@ struct acrn_vm_config
 			 /* Static configured VM0 */
 			 CONFIG_PRE_STD_VM,
 			 .name = "SAFETY_VM0",
-			 .vm_prio = PRIO_LOW,
+			 .sched_params =
+			 	 {
+					 .prio = PRIO_LOW,
+				 },
 			 .companion_vm_id = 65535U,
 			 .guest_flags = (GUEST_FLAG_STATIC_VM),
 			 .cpu_affinity = VM0_CONFIG_CPU_AFFINITY,
@@ -106,7 +109,10 @@ struct acrn_vm_config
 				CONFIG_SERVICE_VM,
 				.name = "ACRN_Service_VM",
 				/* Allow Service VM to reboot the system since it is the highest priority VM. */
-				.vm_prio = PRIO_LOW,
+				.sched_params =
+					{
+						.prio = PRIO_LOW,
+					},
 				.companion_vm_id = 65535U,
 				.guest_flags = (GUEST_FLAG_STATIC_VM),
 				.cpu_affinity = SERVICE_VM_CONFIG_CPU_AFFINITY,
@@ -163,7 +169,10 @@ struct acrn_vm_config
 				/* Static configured VM2 */
 				CONFIG_POST_STD_VM,
 				.name = "POST_STD_VM1",
-				.vm_prio = PRIO_LOW,
+				.sched_params =
+					{
+						.prio = PRIO_LOW,
+					},
 				.companion_vm_id = 65535U,
 				.guest_flags = (GUEST_FLAG_STATIC_VM),
 				.cpu_affinity = VM2_CONFIG_CPU_AFFINITY,
@@ -186,7 +195,10 @@ struct acrn_vm_config
 				/* Static configured VM3 */
 				CONFIG_POST_STD_VM,
 				.name = "POST_STD_VM2",
-				.vm_prio = PRIO_LOW,
+				.sched_params =
+					{
+						.prio = PRIO_LOW,
+					},
 				.companion_vm_id = 65535U,
 				.guest_flags = (GUEST_FLAG_STATIC_VM),
 				.cpu_affinity = VM3_CONFIG_CPU_AFFINITY,

misc/config_tools/data/generic_board/generic_code/partitioned/vm_configurations.c

@@ -25,7 +25,10 @@ struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 		/* Static configured VM0 */
 		CONFIG_PRE_STD_VM,
 		.name = "PRE_STD_VM0",
-		.vm_prio = PRIO_LOW,
+		.sched_params =
+			{
+				.prio = PRIO_LOW,
+			},
 		.companion_vm_id = 65535U,
 		.guest_flags = (GUEST_FLAG_STATIC_VM),
 		.cpu_affinity = VM0_CONFIG_CPU_AFFINITY,
@@ -102,7 +105,10 @@ struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 		/* Static configured VM1 */
 		CONFIG_PRE_STD_VM,
 		.name = "PRE_STD_VM1",
-		.vm_prio = PRIO_LOW,
+		.sched_params =
+			{
+				.prio = PRIO_LOW,
+			},
 		.companion_vm_id = 65535U,
 		.guest_flags = (GUEST_FLAG_STATIC_VM),
 		.cpu_affinity = VM1_CONFIG_CPU_AFFINITY,

misc/config_tools/data/generic_board/generic_code/shared/vm_configurations.c

@@ -17,7 +17,10 @@ struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 		CONFIG_SERVICE_VM,
 		.name = "ACRN_Service_VM",
 		/* Allow Service VM to reboot the system since it is the highest priority VM. */
-		.vm_prio = PRIO_LOW,
+		.sched_params =
+			{
+				.prio = PRIO_LOW,
+			},
 		.companion_vm_id = 65535U,
 		.guest_flags = (GUEST_FLAG_STATIC_VM),
 		.cpu_affinity = SERVICE_VM_CONFIG_CPU_AFFINITY,
@@ -74,7 +77,10 @@ struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 		/* Static configured VM1 */
 		CONFIG_POST_STD_VM,
 		.name = "POST_STD_VM1",
-		.vm_prio = PRIO_LOW,
+		.sched_params =
+			{
+				.prio = PRIO_LOW,
+			},
 		.companion_vm_id = 65535U,
 		.guest_flags = (GUEST_FLAG_STATIC_VM),
 		.cpu_affinity = VM1_CONFIG_CPU_AFFINITY,
@@ -105,7 +111,10 @@ struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 		/* Static configured VM2 */
 		CONFIG_POST_RT_VM,
 		.name = "POST_RT_VM1",
-		.vm_prio = PRIO_LOW,
+		.sched_params =
+			{
+				.prio = PRIO_LOW,
+			},
 		.companion_vm_id = 65535U,
 		.guest_flags = (GUEST_FLAG_LAPIC_PASSTHROUGH | GUEST_FLAG_RT | GUEST_FLAG_STATIC_VM),
 		.cpu_affinity = VM2_CONFIG_CPU_AFFINITY,

misc/config_tools/xforms/vm_configurations.c.xsl

@@ -110,7 +110,10 @@
       <xsl:value-of select="acrn:comment('Allow Service VM to reboot the system since it is the highest priority VM.')" />
       <xsl:value-of select="$newline" />
     </xsl:if>
-    <xsl:value-of select="acrn:initializer('vm_prio', priority)" />
+    <xsl:value-of select="acrn:initializer('sched_params', '{', true())" />
+    <xsl:value-of select="acrn:initializer('prio', priority)" />
+    <xsl:text>},</xsl:text>
+    <xsl:value-of select="$newline" />
     <xsl:value-of select="acrn:initializer('companion_vm_id', concat(companion_vmid, 'U'))" />
     <xsl:call-template name="guest_flags" />