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KVM: s390: remove the tasklet used by the hrtimer 

We can get rid of the tasklet used for waking up a VCPU in the hrtimer
code but wakeup the VCPU directly.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2014-05-16 12:08:29 +02:00 committed by Christian Borntraeger
parent 0e9c85a5a3
commit ea74c0ea1b
4 changed files with 1 additions and 16 deletions
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1
arch/s390/include/asm/kvm_host.h
View File

@ -366,7 +366,6 @@ struct kvm_vcpu_arch {
s390_fp_regs guest_fpregs;
struct kvm_s390_local_interrupt local_int;
struct hrtimer ckc_timer;
struct tasklet_struct tasklet;
struct kvm_s390_pgm_info pgm;
union {
struct cpuid cpu_id;

13
arch/s390/kvm/interrupt.c
View File

@ -629,23 +629,12 @@ void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
}
}
void kvm_s390_tasklet(unsigned long parm)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm;
kvm_s390_vcpu_wakeup(vcpu);
}
/*
* low level hrtimer wake routine. Because this runs in hardirq context
* we schedule a tasklet to do the real work.
*/
enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
{
struct kvm_vcpu *vcpu;
vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
vcpu->preempted = true;
tasklet_schedule(&vcpu->arch.tasklet);
kvm_s390_vcpu_wakeup(vcpu);
return HRTIMER_NORESTART;
}

2
arch/s390/kvm/kvm-s390.c
View File

@ -649,8 +649,6 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
return rc;
}
hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet,
(unsigned long) vcpu);
vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
get_cpu_id(&vcpu->arch.cpu_id);
vcpu->arch.cpu_id.version = 0xff;

1
arch/s390/kvm/kvm-s390.h
View File

@ -138,7 +138,6 @@ static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
void kvm_s390_tasklet(unsigned long parm);
void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu);
void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);