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scheduler: make scheduling based on struct sched_object

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use struct sched_object as the main interface of scheduling, then
make scheduler as an independent module to vcpu:
- add struct sched_object as one field in struct vcpu
- define sched_object.thread for switch_to thread
- define sched_object.prepare_switch_out/in for prepare_switch before
  switch_to
- move context_switch_out/context_switch_in into vcpu.c as
  vcpu.sched_obj.prepare_switch_out/in
- make default_idle as global idle.thread for idle_thread
- make vcpu_thread as vcpu.sched_obj.thread for each vcpu thread
- simplify switch_to based on sched_object

Tracked-On: #1842
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <edide.dong@intel.com>
This commit is contained in:
Jason Chen CJ
2018-12-20 15:15:20 +08:00
committed by wenlingz
parent 8aae0dff87
commit ff0703dd40
6 changed files with 116 additions and 104 deletions
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31
hypervisor/arch/x86/guest/vcpu.c
View File

@@ -600,6 +600,34 @@ void resume_vcpu(struct acrn_vcpu *vcpu)
release_schedule_lock(vcpu->pcpu_id);
}
static void context_switch_out(struct sched_object *prev)
{
struct acrn_vcpu *vcpu = list_entry(prev, struct acrn_vcpu, sched_obj);
/* cancel event(int, gp, nmi and exception) injection */
cancel_event_injection(vcpu);
atomic_store32(&vcpu->running, 0U);
/* do prev vcpu context switch out */
/* For now, we don't need to invalid ept.
* But if we have more than one vcpu on one pcpu,
* we need add ept invalid operation here.
*/
}
static void context_switch_in(struct sched_object *next)
{
struct acrn_vcpu *vcpu = list_entry(next, struct acrn_vcpu, sched_obj);
atomic_store32(&vcpu->running, 1U);
/* FIXME:
* Now, we don't need to load new vcpu VMCS because
* we only do switch between vcpu loop and idle loop.
* If we have more than one vcpu on on pcpu, need to
* add VMCS load operation here.
*/
}
void schedule_vcpu(struct acrn_vcpu *vcpu)
{
vcpu->state = VCPU_RUNNING;
@@ -625,6 +653,9 @@ int32_t prepare_vcpu(struct acrn_vm *vm, uint16_t pcpu_id)
set_pcpu_used(pcpu_id);
INIT_LIST_HEAD(&vcpu->sched_obj.run_list);
vcpu->sched_obj.thread = vcpu_thread;
vcpu->sched_obj.prepare_switch_out = context_switch_out;
vcpu->sched_obj.prepare_switch_in = context_switch_in;
return ret;
}

2
hypervisor/arch/x86/init.c
View File

@@ -69,7 +69,7 @@ static void enter_guest_mode(uint16_t pcpu_id)
}
#endif
default_idle();
switch_to_idle(default_idle);
/* Control should not come here */
cpu_dead();