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add lock for vcpu state access

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keep the global variables access exclusive in vcpu pause & resume.

Signed-]off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Minggui Cao 2018-06-05 15:05:47 +08:00 committed by lijinxia
parent 9f1faa69fd
commit 66d283d0c4
1 changed files with 2 additions and 2 deletions
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4
hypervisor/arch/x86/guest/vcpu.c
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@ -280,10 +280,10 @@ void pause_vcpu(struct vcpu *vcpu, enum vcpu_state new_state)
pr_dbg("vcpu%d paused, new state: %d", pr_dbg("vcpu%d paused, new state: %d",
vcpu->vcpu_id, new_state); vcpu->vcpu_id, new_state);
get_schedule_lock(vcpu->pcpu_id);
vcpu->prev_state = vcpu->state; vcpu->prev_state = vcpu->state;
vcpu->state = new_state; vcpu->state = new_state;
get_schedule_lock(vcpu->pcpu_id);
if (atomic_load(&vcpu->running) == 1) { if (atomic_load(&vcpu->running) == 1) {
remove_vcpu_from_runqueue(vcpu); remove_vcpu_from_runqueue(vcpu);
make_reschedule_request(vcpu); make_reschedule_request(vcpu);
@ -303,9 +303,9 @@ void resume_vcpu(struct vcpu *vcpu)
{ {
pr_dbg("vcpu%d resumed", vcpu->vcpu_id); pr_dbg("vcpu%d resumed", vcpu->vcpu_id);
get_schedule_lock(vcpu->pcpu_id);
vcpu->state = vcpu->prev_state; vcpu->state = vcpu->prev_state;
get_schedule_lock(vcpu->pcpu_id);
if (vcpu->state == VCPU_RUNNING) { if (vcpu->state == VCPU_RUNNING) {
add_vcpu_to_runqueue(vcpu); add_vcpu_to_runqueue(vcpu);
make_reschedule_request(vcpu); make_reschedule_request(vcpu);