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KVM: apic round robin cleanup

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If no apic is enabled in the bitmap of an interrupt delivery with delivery
mode of lowest priority, a warning should be reported rather than select
a fallback vcpu

Signed-off-by: Qing He <qing.he@intel.com>
Signed-off-by: Eddie (Yaozu) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Qing He
2007-09-24 17:39:41 +08:00
committed by Avi Kivity
parent 313a3dc75d
commit e4d47f404b
1 changed files with 3 additions and 10 deletions
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11
drivers/kvm/lapic.c
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@@ -395,10 +395,9 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
struct kvm_lapic *kvm_apic_round_robin(struct kvm *kvm, u8 vector, struct kvm_lapic *kvm_apic_round_robin(struct kvm *kvm, u8 vector,
unsigned long bitmap) unsigned long bitmap)
{ {
int vcpu_id;
int last; int last;
int next; int next;
struct kvm_lapic *apic; struct kvm_lapic *apic = NULL;
last = kvm->round_robin_prev_vcpu; last = kvm->round_robin_prev_vcpu;
next = last; next = last;
@@ -415,14 +414,8 @@ struct kvm_lapic *kvm_apic_round_robin(struct kvm *kvm, u8 vector,
} while (next != last); } while (next != last);
kvm->round_robin_prev_vcpu = next; kvm->round_robin_prev_vcpu = next;
if (!apic) { if (!apic)
vcpu_id = ffs(bitmap) - 1;
if (vcpu_id < 0) {
vcpu_id = 0;
printk(KERN_DEBUG "vcpu not ready for apic_round_robin\n"); printk(KERN_DEBUG "vcpu not ready for apic_round_robin\n");
}
apic = kvm->vcpus[vcpu_id]->apic;
}
return apic; return apic;
} }