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KVM: Add kvm_free_lapic() to pair with kvm_create_lapic()

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Instead of the asymetry of kvm_free_apic, implement kvm_free_lapic().
And guess what?  I found a minor bug: we don't need to hrtimer_cancel()
from kvm_main.c, because we do that in kvm_free_apic().

Also:
1) kvm_vcpu_uninit should be the reverse order from kvm_vcpu_init.
2) Don't set apic->regs_page to zero before freeing apic.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Rusty Russell 2007-10-08 10:48:30 +10:00 committed by Avi Kivity
parent 82ce2c9683
commit d589444e92
3 changed files with 11 additions and 14 deletions
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2
drivers/kvm/irq.h
View File

@ -139,7 +139,7 @@ int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
int kvm_create_lapic(struct kvm_vcpu *vcpu);
void kvm_lapic_reset(struct kvm_vcpu *vcpu);
void kvm_free_apic(struct kvm_lapic *apic);
void kvm_free_lapic(struct kvm_vcpu *vcpu);
u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);

4
drivers/kvm/kvm_main.c
View File

@ -268,10 +268,8 @@ EXPORT_SYMBOL_GPL(kvm_vcpu_init);
void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
{
kvm_free_lapic(vcpu);
kvm_mmu_destroy(vcpu);
if (vcpu->apic)
hrtimer_cancel(&vcpu->apic->timer.dev);
kvm_free_apic(vcpu->apic);
free_page((unsigned long)vcpu->pio_data);
free_page((unsigned long)vcpu->run);
}

19
drivers/kvm/lapic.c
View File

@ -762,19 +762,17 @@ static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr)
return ret;
}
void kvm_free_apic(struct kvm_lapic *apic)
void kvm_free_lapic(struct kvm_vcpu *vcpu)
{
if (!apic)
if (!vcpu->apic)
return;
hrtimer_cancel(&apic->timer.dev);
hrtimer_cancel(&vcpu->apic->timer.dev);
if (apic->regs_page) {
__free_page(apic->regs_page);
apic->regs_page = 0;
}
if (vcpu->apic->regs_page)
__free_page(vcpu->apic->regs_page);
kfree(apic);
kfree(vcpu->apic);
}
/*
@ -962,7 +960,7 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
if (apic->regs_page == NULL) {
printk(KERN_ERR "malloc apic regs error for vcpu %x\n",
vcpu->vcpu_id);
goto nomem;
goto nomem_free_apic;
}
apic->regs = page_address(apic->regs_page);
memset(apic->regs, 0, PAGE_SIZE);
@ -980,8 +978,9 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
apic->dev.private = apic;
return 0;
nomem_free_apic:
kfree(apic);
nomem:
kvm_free_apic(apic);
return -ENOMEM;
}
EXPORT_SYMBOL_GPL(kvm_create_lapic);