From 44944d4d28948c71b110b09a2e924e505cd39e8b Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Sun, 7 Apr 2013 08:25:18 +0800 Subject: [PATCH] KVM: Call kvm_apic_match_dest() to check destination vcpu For a given vcpu, kvm_apic_match_dest() will tell you whether the vcpu in the destination list quickly. Drop kvm_calculate_eoi_exitmap() and use kvm_apic_match_dest() instead. Signed-off-by: Yang Zhang Signed-off-by: Gleb Natapov --- arch/x86/kvm/lapic.c | 47 -------------------------------------------- arch/x86/kvm/lapic.h | 4 ---- virt/kvm/ioapic.c | 9 +++------ 3 files changed, 3 insertions(+), 57 deletions(-) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index a8e9369f41c5..e2274745ab3d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -145,53 +145,6 @@ static inline int kvm_apic_id(struct kvm_lapic *apic) return (kvm_apic_get_reg(apic, APIC_ID) >> 24) & 0xff; } -void kvm_calculate_eoi_exitmap(struct kvm_vcpu *vcpu, - struct kvm_lapic_irq *irq, - u64 *eoi_exit_bitmap) -{ - struct kvm_lapic **dst; - struct kvm_apic_map *map; - unsigned long bitmap = 1; - int i; - - rcu_read_lock(); - map = rcu_dereference(vcpu->kvm->arch.apic_map); - - if (unlikely(!map)) { - __set_bit(irq->vector, (unsigned long *)eoi_exit_bitmap); - goto out; - } - - if (irq->dest_mode == 0) { /* physical mode */ - if (irq->delivery_mode == APIC_DM_LOWEST || - irq->dest_id == 0xff) { - __set_bit(irq->vector, - (unsigned long *)eoi_exit_bitmap); - goto out; - } - dst = &map->phys_map[irq->dest_id & 0xff]; - } else { - u32 mda = irq->dest_id << (32 - map->ldr_bits); - - dst = map->logical_map[apic_cluster_id(map, mda)]; - - bitmap = apic_logical_id(map, mda); - } - - for_each_set_bit(i, &bitmap, 16) { - if (!dst[i]) - continue; - if (dst[i]->vcpu == vcpu) { - __set_bit(irq->vector, - (unsigned long *)eoi_exit_bitmap); - break; - } - } - -out: - rcu_read_unlock(); -} - static void recalculate_apic_map(struct kvm *kvm) { struct kvm_apic_map *new, *old = NULL; diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h index 2c721b986eec..baa20cfb95ae 100644 --- a/arch/x86/kvm/lapic.h +++ b/arch/x86/kvm/lapic.h @@ -160,10 +160,6 @@ static inline u16 apic_logical_id(struct kvm_apic_map *map, u32 ldr) return ldr & map->lid_mask; } -void kvm_calculate_eoi_exitmap(struct kvm_vcpu *vcpu, - struct kvm_lapic_irq *irq, - u64 *eoi_bitmap); - static inline bool kvm_apic_has_events(struct kvm_vcpu *vcpu) { return vcpu->arch.apic->pending_events; diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index 5ba005c00e2f..914cbe027d06 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c @@ -124,7 +124,6 @@ void kvm_ioapic_calculate_eoi_exitmap(struct kvm_vcpu *vcpu, { struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic; union kvm_ioapic_redirect_entry *e; - struct kvm_lapic_irq irqe; int index; spin_lock(&ioapic->lock); @@ -135,11 +134,9 @@ void kvm_ioapic_calculate_eoi_exitmap(struct kvm_vcpu *vcpu, (e->fields.trig_mode == IOAPIC_LEVEL_TRIG || kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index))) { - irqe.dest_id = e->fields.dest_id; - irqe.vector = e->fields.vector; - irqe.dest_mode = e->fields.dest_mode; - irqe.delivery_mode = e->fields.delivery_mode << 8; - kvm_calculate_eoi_exitmap(vcpu, &irqe, eoi_exit_bitmap); + if (kvm_apic_match_dest(vcpu, NULL, 0, + e->fields.dest_id, e->fields.dest_mode)) + __set_bit(e->fields.vector, (unsigned long *)eoi_exit_bitmap); } } spin_unlock(&ioapic->lock); -- 2.39.5